1 /* This is the Linux kernel elf-loading code, ported into user space */
2 #include "qemu/osdep.h"
5 #include <sys/resource.h>
9 #include "user-internals.h"
10 #include "signal-common.h"
12 #include "user-mmap.h"
13 #include "disas/disas.h"
14 #include "qemu/bitops.h"
15 #include "qemu/path.h"
16 #include "qemu/queue.h"
17 #include "qemu/guest-random.h"
18 #include "qemu/units.h"
19 #include "qemu/selfmap.h"
20 #include "qapi/error.h"
21 #include "target_signal.h"
33 #define ELF_OSABI ELFOSABI_SYSV
35 /* from personality.h */
38 * Flags for bug emulation.
40 * These occupy the top three bytes.
43 ADDR_NO_RANDOMIZE
= 0x0040000, /* disable randomization of VA space */
44 FDPIC_FUNCPTRS
= 0x0080000, /* userspace function ptrs point to
45 descriptors (signal handling) */
46 MMAP_PAGE_ZERO
= 0x0100000,
47 ADDR_COMPAT_LAYOUT
= 0x0200000,
48 READ_IMPLIES_EXEC
= 0x0400000,
49 ADDR_LIMIT_32BIT
= 0x0800000,
50 SHORT_INODE
= 0x1000000,
51 WHOLE_SECONDS
= 0x2000000,
52 STICKY_TIMEOUTS
= 0x4000000,
53 ADDR_LIMIT_3GB
= 0x8000000,
59 * These go in the low byte. Avoid using the top bit, it will
60 * conflict with error returns.
64 PER_LINUX_32BIT
= 0x0000 | ADDR_LIMIT_32BIT
,
65 PER_LINUX_FDPIC
= 0x0000 | FDPIC_FUNCPTRS
,
66 PER_SVR4
= 0x0001 | STICKY_TIMEOUTS
| MMAP_PAGE_ZERO
,
67 PER_SVR3
= 0x0002 | STICKY_TIMEOUTS
| SHORT_INODE
,
68 PER_SCOSVR3
= 0x0003 | STICKY_TIMEOUTS
| WHOLE_SECONDS
| SHORT_INODE
,
69 PER_OSR5
= 0x0003 | STICKY_TIMEOUTS
| WHOLE_SECONDS
,
70 PER_WYSEV386
= 0x0004 | STICKY_TIMEOUTS
| SHORT_INODE
,
71 PER_ISCR4
= 0x0005 | STICKY_TIMEOUTS
,
73 PER_SUNOS
= 0x0006 | STICKY_TIMEOUTS
,
74 PER_XENIX
= 0x0007 | STICKY_TIMEOUTS
| SHORT_INODE
,
76 PER_LINUX32_3GB
= 0x0008 | ADDR_LIMIT_3GB
,
77 PER_IRIX32
= 0x0009 | STICKY_TIMEOUTS
,/* IRIX5 32-bit */
78 PER_IRIXN32
= 0x000a | STICKY_TIMEOUTS
,/* IRIX6 new 32-bit */
79 PER_IRIX64
= 0x000b | STICKY_TIMEOUTS
,/* IRIX6 64-bit */
81 PER_SOLARIS
= 0x000d | STICKY_TIMEOUTS
,
82 PER_UW7
= 0x000e | STICKY_TIMEOUTS
| MMAP_PAGE_ZERO
,
83 PER_OSF4
= 0x000f, /* OSF/1 v4 */
89 * Return the base personality without flags.
91 #define personality(pers) (pers & PER_MASK)
93 int info_is_fdpic(struct image_info
*info
)
95 return info
->personality
== PER_LINUX_FDPIC
;
98 /* this flag is uneffective under linux too, should be deleted */
100 #define MAP_DENYWRITE 0
103 /* should probably go in elf.h */
108 #if TARGET_BIG_ENDIAN
109 #define ELF_DATA ELFDATA2MSB
111 #define ELF_DATA ELFDATA2LSB
114 #ifdef TARGET_ABI_MIPSN32
115 typedef abi_ullong target_elf_greg_t
;
116 #define tswapreg(ptr) tswap64(ptr)
118 typedef abi_ulong target_elf_greg_t
;
119 #define tswapreg(ptr) tswapal(ptr)
123 typedef abi_ushort target_uid_t
;
124 typedef abi_ushort target_gid_t
;
126 typedef abi_uint target_uid_t
;
127 typedef abi_uint target_gid_t
;
129 typedef abi_int target_pid_t
;
133 #define ELF_PLATFORM get_elf_platform()
135 static const char *get_elf_platform(void)
137 static char elf_platform
[] = "i386";
138 int family
= object_property_get_int(OBJECT(thread_cpu
), "family", NULL
);
142 elf_platform
[1] = '0' + family
;
146 #define ELF_HWCAP get_elf_hwcap()
148 static uint32_t get_elf_hwcap(void)
150 X86CPU
*cpu
= X86_CPU(thread_cpu
);
152 return cpu
->env
.features
[FEAT_1_EDX
];
156 #define ELF_START_MMAP 0x2aaaaab000ULL
158 #define ELF_CLASS ELFCLASS64
159 #define ELF_ARCH EM_X86_64
161 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
164 regs
->rsp
= infop
->start_stack
;
165 regs
->rip
= infop
->entry
;
169 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
172 * Note that ELF_NREG should be 29 as there should be place for
173 * TRAPNO and ERR "registers" as well but linux doesn't dump
176 * See linux kernel: arch/x86/include/asm/elf.h
178 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUX86State
*env
)
180 (*regs
)[0] = tswapreg(env
->regs
[15]);
181 (*regs
)[1] = tswapreg(env
->regs
[14]);
182 (*regs
)[2] = tswapreg(env
->regs
[13]);
183 (*regs
)[3] = tswapreg(env
->regs
[12]);
184 (*regs
)[4] = tswapreg(env
->regs
[R_EBP
]);
185 (*regs
)[5] = tswapreg(env
->regs
[R_EBX
]);
186 (*regs
)[6] = tswapreg(env
->regs
[11]);
187 (*regs
)[7] = tswapreg(env
->regs
[10]);
188 (*regs
)[8] = tswapreg(env
->regs
[9]);
189 (*regs
)[9] = tswapreg(env
->regs
[8]);
190 (*regs
)[10] = tswapreg(env
->regs
[R_EAX
]);
191 (*regs
)[11] = tswapreg(env
->regs
[R_ECX
]);
192 (*regs
)[12] = tswapreg(env
->regs
[R_EDX
]);
193 (*regs
)[13] = tswapreg(env
->regs
[R_ESI
]);
194 (*regs
)[14] = tswapreg(env
->regs
[R_EDI
]);
195 (*regs
)[15] = tswapreg(env
->regs
[R_EAX
]); /* XXX */
196 (*regs
)[16] = tswapreg(env
->eip
);
197 (*regs
)[17] = tswapreg(env
->segs
[R_CS
].selector
& 0xffff);
198 (*regs
)[18] = tswapreg(env
->eflags
);
199 (*regs
)[19] = tswapreg(env
->regs
[R_ESP
]);
200 (*regs
)[20] = tswapreg(env
->segs
[R_SS
].selector
& 0xffff);
201 (*regs
)[21] = tswapreg(env
->segs
[R_FS
].selector
& 0xffff);
202 (*regs
)[22] = tswapreg(env
->segs
[R_GS
].selector
& 0xffff);
203 (*regs
)[23] = tswapreg(env
->segs
[R_DS
].selector
& 0xffff);
204 (*regs
)[24] = tswapreg(env
->segs
[R_ES
].selector
& 0xffff);
205 (*regs
)[25] = tswapreg(env
->segs
[R_FS
].selector
& 0xffff);
206 (*regs
)[26] = tswapreg(env
->segs
[R_GS
].selector
& 0xffff);
211 #define ELF_START_MMAP 0x80000000
214 * This is used to ensure we don't load something for the wrong architecture.
216 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
219 * These are used to set parameters in the core dumps.
221 #define ELF_CLASS ELFCLASS32
222 #define ELF_ARCH EM_386
224 static inline void init_thread(struct target_pt_regs
*regs
,
225 struct image_info
*infop
)
227 regs
->esp
= infop
->start_stack
;
228 regs
->eip
= infop
->entry
;
230 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
231 starts %edx contains a pointer to a function which might be
232 registered using `atexit'. This provides a mean for the
233 dynamic linker to call DT_FINI functions for shared libraries
234 that have been loaded before the code runs.
236 A value of 0 tells we have no such handler. */
241 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
244 * Note that ELF_NREG should be 19 as there should be place for
245 * TRAPNO and ERR "registers" as well but linux doesn't dump
248 * See linux kernel: arch/x86/include/asm/elf.h
250 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUX86State
*env
)
252 (*regs
)[0] = tswapreg(env
->regs
[R_EBX
]);
253 (*regs
)[1] = tswapreg(env
->regs
[R_ECX
]);
254 (*regs
)[2] = tswapreg(env
->regs
[R_EDX
]);
255 (*regs
)[3] = tswapreg(env
->regs
[R_ESI
]);
256 (*regs
)[4] = tswapreg(env
->regs
[R_EDI
]);
257 (*regs
)[5] = tswapreg(env
->regs
[R_EBP
]);
258 (*regs
)[6] = tswapreg(env
->regs
[R_EAX
]);
259 (*regs
)[7] = tswapreg(env
->segs
[R_DS
].selector
& 0xffff);
260 (*regs
)[8] = tswapreg(env
->segs
[R_ES
].selector
& 0xffff);
261 (*regs
)[9] = tswapreg(env
->segs
[R_FS
].selector
& 0xffff);
262 (*regs
)[10] = tswapreg(env
->segs
[R_GS
].selector
& 0xffff);
263 (*regs
)[11] = tswapreg(env
->regs
[R_EAX
]); /* XXX */
264 (*regs
)[12] = tswapreg(env
->eip
);
265 (*regs
)[13] = tswapreg(env
->segs
[R_CS
].selector
& 0xffff);
266 (*regs
)[14] = tswapreg(env
->eflags
);
267 (*regs
)[15] = tswapreg(env
->regs
[R_ESP
]);
268 (*regs
)[16] = tswapreg(env
->segs
[R_SS
].selector
& 0xffff);
272 #define USE_ELF_CORE_DUMP
273 #define ELF_EXEC_PAGESIZE 4096
279 #ifndef TARGET_AARCH64
280 /* 32 bit ARM definitions */
282 #define ELF_START_MMAP 0x80000000
284 #define ELF_ARCH EM_ARM
285 #define ELF_CLASS ELFCLASS32
287 static inline void init_thread(struct target_pt_regs
*regs
,
288 struct image_info
*infop
)
290 abi_long stack
= infop
->start_stack
;
291 memset(regs
, 0, sizeof(*regs
));
293 regs
->uregs
[16] = ARM_CPU_MODE_USR
;
294 if (infop
->entry
& 1) {
295 regs
->uregs
[16] |= CPSR_T
;
297 regs
->uregs
[15] = infop
->entry
& 0xfffffffe;
298 regs
->uregs
[13] = infop
->start_stack
;
299 /* FIXME - what to for failure of get_user()? */
300 get_user_ual(regs
->uregs
[2], stack
+ 8); /* envp */
301 get_user_ual(regs
->uregs
[1], stack
+ 4); /* envp */
302 /* XXX: it seems that r0 is zeroed after ! */
304 /* For uClinux PIC binaries. */
305 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
306 regs
->uregs
[10] = infop
->start_data
;
308 /* Support ARM FDPIC. */
309 if (info_is_fdpic(infop
)) {
310 /* As described in the ABI document, r7 points to the loadmap info
311 * prepared by the kernel. If an interpreter is needed, r8 points
312 * to the interpreter loadmap and r9 points to the interpreter
313 * PT_DYNAMIC info. If no interpreter is needed, r8 is zero, and
314 * r9 points to the main program PT_DYNAMIC info.
316 regs
->uregs
[7] = infop
->loadmap_addr
;
317 if (infop
->interpreter_loadmap_addr
) {
318 /* Executable is dynamically loaded. */
319 regs
->uregs
[8] = infop
->interpreter_loadmap_addr
;
320 regs
->uregs
[9] = infop
->interpreter_pt_dynamic_addr
;
323 regs
->uregs
[9] = infop
->pt_dynamic_addr
;
329 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
331 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUARMState
*env
)
333 (*regs
)[0] = tswapreg(env
->regs
[0]);
334 (*regs
)[1] = tswapreg(env
->regs
[1]);
335 (*regs
)[2] = tswapreg(env
->regs
[2]);
336 (*regs
)[3] = tswapreg(env
->regs
[3]);
337 (*regs
)[4] = tswapreg(env
->regs
[4]);
338 (*regs
)[5] = tswapreg(env
->regs
[5]);
339 (*regs
)[6] = tswapreg(env
->regs
[6]);
340 (*regs
)[7] = tswapreg(env
->regs
[7]);
341 (*regs
)[8] = tswapreg(env
->regs
[8]);
342 (*regs
)[9] = tswapreg(env
->regs
[9]);
343 (*regs
)[10] = tswapreg(env
->regs
[10]);
344 (*regs
)[11] = tswapreg(env
->regs
[11]);
345 (*regs
)[12] = tswapreg(env
->regs
[12]);
346 (*regs
)[13] = tswapreg(env
->regs
[13]);
347 (*regs
)[14] = tswapreg(env
->regs
[14]);
348 (*regs
)[15] = tswapreg(env
->regs
[15]);
350 (*regs
)[16] = tswapreg(cpsr_read((CPUARMState
*)env
));
351 (*regs
)[17] = tswapreg(env
->regs
[0]); /* XXX */
354 #define USE_ELF_CORE_DUMP
355 #define ELF_EXEC_PAGESIZE 4096
359 ARM_HWCAP_ARM_SWP
= 1 << 0,
360 ARM_HWCAP_ARM_HALF
= 1 << 1,
361 ARM_HWCAP_ARM_THUMB
= 1 << 2,
362 ARM_HWCAP_ARM_26BIT
= 1 << 3,
363 ARM_HWCAP_ARM_FAST_MULT
= 1 << 4,
364 ARM_HWCAP_ARM_FPA
= 1 << 5,
365 ARM_HWCAP_ARM_VFP
= 1 << 6,
366 ARM_HWCAP_ARM_EDSP
= 1 << 7,
367 ARM_HWCAP_ARM_JAVA
= 1 << 8,
368 ARM_HWCAP_ARM_IWMMXT
= 1 << 9,
369 ARM_HWCAP_ARM_CRUNCH
= 1 << 10,
370 ARM_HWCAP_ARM_THUMBEE
= 1 << 11,
371 ARM_HWCAP_ARM_NEON
= 1 << 12,
372 ARM_HWCAP_ARM_VFPv3
= 1 << 13,
373 ARM_HWCAP_ARM_VFPv3D16
= 1 << 14,
374 ARM_HWCAP_ARM_TLS
= 1 << 15,
375 ARM_HWCAP_ARM_VFPv4
= 1 << 16,
376 ARM_HWCAP_ARM_IDIVA
= 1 << 17,
377 ARM_HWCAP_ARM_IDIVT
= 1 << 18,
378 ARM_HWCAP_ARM_VFPD32
= 1 << 19,
379 ARM_HWCAP_ARM_LPAE
= 1 << 20,
380 ARM_HWCAP_ARM_EVTSTRM
= 1 << 21,
384 ARM_HWCAP2_ARM_AES
= 1 << 0,
385 ARM_HWCAP2_ARM_PMULL
= 1 << 1,
386 ARM_HWCAP2_ARM_SHA1
= 1 << 2,
387 ARM_HWCAP2_ARM_SHA2
= 1 << 3,
388 ARM_HWCAP2_ARM_CRC32
= 1 << 4,
391 /* The commpage only exists for 32 bit kernels */
393 #define HI_COMMPAGE (intptr_t)0xffff0f00u
395 static bool init_guest_commpage(void)
397 void *want
= g2h_untagged(HI_COMMPAGE
& -qemu_host_page_size
);
398 void *addr
= mmap(want
, qemu_host_page_size
, PROT_READ
| PROT_WRITE
,
399 MAP_ANONYMOUS
| MAP_PRIVATE
| MAP_FIXED
, -1, 0);
401 if (addr
== MAP_FAILED
) {
402 perror("Allocating guest commpage");
409 /* Set kernel helper versions; rest of page is 0. */
410 __put_user(5, (uint32_t *)g2h_untagged(0xffff0ffcu
));
412 if (mprotect(addr
, qemu_host_page_size
, PROT_READ
)) {
413 perror("Protecting guest commpage");
419 #define ELF_HWCAP get_elf_hwcap()
420 #define ELF_HWCAP2 get_elf_hwcap2()
422 static uint32_t get_elf_hwcap(void)
424 ARMCPU
*cpu
= ARM_CPU(thread_cpu
);
427 hwcaps
|= ARM_HWCAP_ARM_SWP
;
428 hwcaps
|= ARM_HWCAP_ARM_HALF
;
429 hwcaps
|= ARM_HWCAP_ARM_THUMB
;
430 hwcaps
|= ARM_HWCAP_ARM_FAST_MULT
;
432 /* probe for the extra features */
433 #define GET_FEATURE(feat, hwcap) \
434 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
436 #define GET_FEATURE_ID(feat, hwcap) \
437 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
439 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
440 GET_FEATURE(ARM_FEATURE_V5
, ARM_HWCAP_ARM_EDSP
);
441 GET_FEATURE(ARM_FEATURE_IWMMXT
, ARM_HWCAP_ARM_IWMMXT
);
442 GET_FEATURE(ARM_FEATURE_THUMB2EE
, ARM_HWCAP_ARM_THUMBEE
);
443 GET_FEATURE(ARM_FEATURE_NEON
, ARM_HWCAP_ARM_NEON
);
444 GET_FEATURE(ARM_FEATURE_V6K
, ARM_HWCAP_ARM_TLS
);
445 GET_FEATURE(ARM_FEATURE_LPAE
, ARM_HWCAP_ARM_LPAE
);
446 GET_FEATURE_ID(aa32_arm_div
, ARM_HWCAP_ARM_IDIVA
);
447 GET_FEATURE_ID(aa32_thumb_div
, ARM_HWCAP_ARM_IDIVT
);
448 GET_FEATURE_ID(aa32_vfp
, ARM_HWCAP_ARM_VFP
);
450 if (cpu_isar_feature(aa32_fpsp_v3
, cpu
) ||
451 cpu_isar_feature(aa32_fpdp_v3
, cpu
)) {
452 hwcaps
|= ARM_HWCAP_ARM_VFPv3
;
453 if (cpu_isar_feature(aa32_simd_r32
, cpu
)) {
454 hwcaps
|= ARM_HWCAP_ARM_VFPD32
;
456 hwcaps
|= ARM_HWCAP_ARM_VFPv3D16
;
459 GET_FEATURE_ID(aa32_simdfmac
, ARM_HWCAP_ARM_VFPv4
);
464 static uint32_t get_elf_hwcap2(void)
466 ARMCPU
*cpu
= ARM_CPU(thread_cpu
);
469 GET_FEATURE_ID(aa32_aes
, ARM_HWCAP2_ARM_AES
);
470 GET_FEATURE_ID(aa32_pmull
, ARM_HWCAP2_ARM_PMULL
);
471 GET_FEATURE_ID(aa32_sha1
, ARM_HWCAP2_ARM_SHA1
);
472 GET_FEATURE_ID(aa32_sha2
, ARM_HWCAP2_ARM_SHA2
);
473 GET_FEATURE_ID(aa32_crc32
, ARM_HWCAP2_ARM_CRC32
);
478 #undef GET_FEATURE_ID
480 #define ELF_PLATFORM get_elf_platform()
482 static const char *get_elf_platform(void)
484 CPUARMState
*env
= thread_cpu
->env_ptr
;
486 #if TARGET_BIG_ENDIAN
492 if (arm_feature(env
, ARM_FEATURE_V8
)) {
494 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
495 if (arm_feature(env
, ARM_FEATURE_M
)) {
500 } else if (arm_feature(env
, ARM_FEATURE_V6
)) {
502 } else if (arm_feature(env
, ARM_FEATURE_V5
)) {
512 /* 64 bit ARM definitions */
513 #define ELF_START_MMAP 0x80000000
515 #define ELF_ARCH EM_AARCH64
516 #define ELF_CLASS ELFCLASS64
517 #if TARGET_BIG_ENDIAN
518 # define ELF_PLATFORM "aarch64_be"
520 # define ELF_PLATFORM "aarch64"
523 static inline void init_thread(struct target_pt_regs
*regs
,
524 struct image_info
*infop
)
526 abi_long stack
= infop
->start_stack
;
527 memset(regs
, 0, sizeof(*regs
));
529 regs
->pc
= infop
->entry
& ~0x3ULL
;
534 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
536 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
537 const CPUARMState
*env
)
541 for (i
= 0; i
< 32; i
++) {
542 (*regs
)[i
] = tswapreg(env
->xregs
[i
]);
544 (*regs
)[32] = tswapreg(env
->pc
);
545 (*regs
)[33] = tswapreg(pstate_read((CPUARMState
*)env
));
548 #define USE_ELF_CORE_DUMP
549 #define ELF_EXEC_PAGESIZE 4096
552 ARM_HWCAP_A64_FP
= 1 << 0,
553 ARM_HWCAP_A64_ASIMD
= 1 << 1,
554 ARM_HWCAP_A64_EVTSTRM
= 1 << 2,
555 ARM_HWCAP_A64_AES
= 1 << 3,
556 ARM_HWCAP_A64_PMULL
= 1 << 4,
557 ARM_HWCAP_A64_SHA1
= 1 << 5,
558 ARM_HWCAP_A64_SHA2
= 1 << 6,
559 ARM_HWCAP_A64_CRC32
= 1 << 7,
560 ARM_HWCAP_A64_ATOMICS
= 1 << 8,
561 ARM_HWCAP_A64_FPHP
= 1 << 9,
562 ARM_HWCAP_A64_ASIMDHP
= 1 << 10,
563 ARM_HWCAP_A64_CPUID
= 1 << 11,
564 ARM_HWCAP_A64_ASIMDRDM
= 1 << 12,
565 ARM_HWCAP_A64_JSCVT
= 1 << 13,
566 ARM_HWCAP_A64_FCMA
= 1 << 14,
567 ARM_HWCAP_A64_LRCPC
= 1 << 15,
568 ARM_HWCAP_A64_DCPOP
= 1 << 16,
569 ARM_HWCAP_A64_SHA3
= 1 << 17,
570 ARM_HWCAP_A64_SM3
= 1 << 18,
571 ARM_HWCAP_A64_SM4
= 1 << 19,
572 ARM_HWCAP_A64_ASIMDDP
= 1 << 20,
573 ARM_HWCAP_A64_SHA512
= 1 << 21,
574 ARM_HWCAP_A64_SVE
= 1 << 22,
575 ARM_HWCAP_A64_ASIMDFHM
= 1 << 23,
576 ARM_HWCAP_A64_DIT
= 1 << 24,
577 ARM_HWCAP_A64_USCAT
= 1 << 25,
578 ARM_HWCAP_A64_ILRCPC
= 1 << 26,
579 ARM_HWCAP_A64_FLAGM
= 1 << 27,
580 ARM_HWCAP_A64_SSBS
= 1 << 28,
581 ARM_HWCAP_A64_SB
= 1 << 29,
582 ARM_HWCAP_A64_PACA
= 1 << 30,
583 ARM_HWCAP_A64_PACG
= 1UL << 31,
585 ARM_HWCAP2_A64_DCPODP
= 1 << 0,
586 ARM_HWCAP2_A64_SVE2
= 1 << 1,
587 ARM_HWCAP2_A64_SVEAES
= 1 << 2,
588 ARM_HWCAP2_A64_SVEPMULL
= 1 << 3,
589 ARM_HWCAP2_A64_SVEBITPERM
= 1 << 4,
590 ARM_HWCAP2_A64_SVESHA3
= 1 << 5,
591 ARM_HWCAP2_A64_SVESM4
= 1 << 6,
592 ARM_HWCAP2_A64_FLAGM2
= 1 << 7,
593 ARM_HWCAP2_A64_FRINT
= 1 << 8,
594 ARM_HWCAP2_A64_SVEI8MM
= 1 << 9,
595 ARM_HWCAP2_A64_SVEF32MM
= 1 << 10,
596 ARM_HWCAP2_A64_SVEF64MM
= 1 << 11,
597 ARM_HWCAP2_A64_SVEBF16
= 1 << 12,
598 ARM_HWCAP2_A64_I8MM
= 1 << 13,
599 ARM_HWCAP2_A64_BF16
= 1 << 14,
600 ARM_HWCAP2_A64_DGH
= 1 << 15,
601 ARM_HWCAP2_A64_RNG
= 1 << 16,
602 ARM_HWCAP2_A64_BTI
= 1 << 17,
603 ARM_HWCAP2_A64_MTE
= 1 << 18,
606 #define ELF_HWCAP get_elf_hwcap()
607 #define ELF_HWCAP2 get_elf_hwcap2()
609 #define GET_FEATURE_ID(feat, hwcap) \
610 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
612 static uint32_t get_elf_hwcap(void)
614 ARMCPU
*cpu
= ARM_CPU(thread_cpu
);
617 hwcaps
|= ARM_HWCAP_A64_FP
;
618 hwcaps
|= ARM_HWCAP_A64_ASIMD
;
619 hwcaps
|= ARM_HWCAP_A64_CPUID
;
621 /* probe for the extra features */
623 GET_FEATURE_ID(aa64_aes
, ARM_HWCAP_A64_AES
);
624 GET_FEATURE_ID(aa64_pmull
, ARM_HWCAP_A64_PMULL
);
625 GET_FEATURE_ID(aa64_sha1
, ARM_HWCAP_A64_SHA1
);
626 GET_FEATURE_ID(aa64_sha256
, ARM_HWCAP_A64_SHA2
);
627 GET_FEATURE_ID(aa64_sha512
, ARM_HWCAP_A64_SHA512
);
628 GET_FEATURE_ID(aa64_crc32
, ARM_HWCAP_A64_CRC32
);
629 GET_FEATURE_ID(aa64_sha3
, ARM_HWCAP_A64_SHA3
);
630 GET_FEATURE_ID(aa64_sm3
, ARM_HWCAP_A64_SM3
);
631 GET_FEATURE_ID(aa64_sm4
, ARM_HWCAP_A64_SM4
);
632 GET_FEATURE_ID(aa64_fp16
, ARM_HWCAP_A64_FPHP
| ARM_HWCAP_A64_ASIMDHP
);
633 GET_FEATURE_ID(aa64_atomics
, ARM_HWCAP_A64_ATOMICS
);
634 GET_FEATURE_ID(aa64_rdm
, ARM_HWCAP_A64_ASIMDRDM
);
635 GET_FEATURE_ID(aa64_dp
, ARM_HWCAP_A64_ASIMDDP
);
636 GET_FEATURE_ID(aa64_fcma
, ARM_HWCAP_A64_FCMA
);
637 GET_FEATURE_ID(aa64_sve
, ARM_HWCAP_A64_SVE
);
638 GET_FEATURE_ID(aa64_pauth
, ARM_HWCAP_A64_PACA
| ARM_HWCAP_A64_PACG
);
639 GET_FEATURE_ID(aa64_fhm
, ARM_HWCAP_A64_ASIMDFHM
);
640 GET_FEATURE_ID(aa64_jscvt
, ARM_HWCAP_A64_JSCVT
);
641 GET_FEATURE_ID(aa64_sb
, ARM_HWCAP_A64_SB
);
642 GET_FEATURE_ID(aa64_condm_4
, ARM_HWCAP_A64_FLAGM
);
643 GET_FEATURE_ID(aa64_dcpop
, ARM_HWCAP_A64_DCPOP
);
644 GET_FEATURE_ID(aa64_rcpc_8_3
, ARM_HWCAP_A64_LRCPC
);
645 GET_FEATURE_ID(aa64_rcpc_8_4
, ARM_HWCAP_A64_ILRCPC
);
650 static uint32_t get_elf_hwcap2(void)
652 ARMCPU
*cpu
= ARM_CPU(thread_cpu
);
655 GET_FEATURE_ID(aa64_dcpodp
, ARM_HWCAP2_A64_DCPODP
);
656 GET_FEATURE_ID(aa64_sve2
, ARM_HWCAP2_A64_SVE2
);
657 GET_FEATURE_ID(aa64_sve2_aes
, ARM_HWCAP2_A64_SVEAES
);
658 GET_FEATURE_ID(aa64_sve2_pmull128
, ARM_HWCAP2_A64_SVEPMULL
);
659 GET_FEATURE_ID(aa64_sve2_bitperm
, ARM_HWCAP2_A64_SVEBITPERM
);
660 GET_FEATURE_ID(aa64_sve2_sha3
, ARM_HWCAP2_A64_SVESHA3
);
661 GET_FEATURE_ID(aa64_sve2_sm4
, ARM_HWCAP2_A64_SVESM4
);
662 GET_FEATURE_ID(aa64_condm_5
, ARM_HWCAP2_A64_FLAGM2
);
663 GET_FEATURE_ID(aa64_frint
, ARM_HWCAP2_A64_FRINT
);
664 GET_FEATURE_ID(aa64_sve_i8mm
, ARM_HWCAP2_A64_SVEI8MM
);
665 GET_FEATURE_ID(aa64_sve_f32mm
, ARM_HWCAP2_A64_SVEF32MM
);
666 GET_FEATURE_ID(aa64_sve_f64mm
, ARM_HWCAP2_A64_SVEF64MM
);
667 GET_FEATURE_ID(aa64_sve_bf16
, ARM_HWCAP2_A64_SVEBF16
);
668 GET_FEATURE_ID(aa64_i8mm
, ARM_HWCAP2_A64_I8MM
);
669 GET_FEATURE_ID(aa64_bf16
, ARM_HWCAP2_A64_BF16
);
670 GET_FEATURE_ID(aa64_rndr
, ARM_HWCAP2_A64_RNG
);
671 GET_FEATURE_ID(aa64_bti
, ARM_HWCAP2_A64_BTI
);
672 GET_FEATURE_ID(aa64_mte
, ARM_HWCAP2_A64_MTE
);
677 #undef GET_FEATURE_ID
679 #endif /* not TARGET_AARCH64 */
680 #endif /* TARGET_ARM */
683 #ifdef TARGET_SPARC64
685 #define ELF_START_MMAP 0x80000000
686 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
687 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
689 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
691 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
694 #define ELF_CLASS ELFCLASS64
695 #define ELF_ARCH EM_SPARCV9
697 #define ELF_START_MMAP 0x80000000
698 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
699 | HWCAP_SPARC_MULDIV)
700 #define ELF_CLASS ELFCLASS32
701 #define ELF_ARCH EM_SPARC
702 #endif /* TARGET_SPARC64 */
704 static inline void init_thread(struct target_pt_regs
*regs
,
705 struct image_info
*infop
)
707 /* Note that target_cpu_copy_regs does not read psr/tstate. */
708 regs
->pc
= infop
->entry
;
709 regs
->npc
= regs
->pc
+ 4;
711 regs
->u_regs
[14] = (infop
->start_stack
- 16 * sizeof(abi_ulong
)
712 - TARGET_STACK_BIAS
);
714 #endif /* TARGET_SPARC */
718 #define ELF_MACHINE PPC_ELF_MACHINE
719 #define ELF_START_MMAP 0x80000000
721 #if defined(TARGET_PPC64)
723 #define elf_check_arch(x) ( (x) == EM_PPC64 )
725 #define ELF_CLASS ELFCLASS64
729 #define ELF_CLASS ELFCLASS32
733 #define ELF_ARCH EM_PPC
735 /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
736 See arch/powerpc/include/asm/cputable.h. */
738 QEMU_PPC_FEATURE_32
= 0x80000000,
739 QEMU_PPC_FEATURE_64
= 0x40000000,
740 QEMU_PPC_FEATURE_601_INSTR
= 0x20000000,
741 QEMU_PPC_FEATURE_HAS_ALTIVEC
= 0x10000000,
742 QEMU_PPC_FEATURE_HAS_FPU
= 0x08000000,
743 QEMU_PPC_FEATURE_HAS_MMU
= 0x04000000,
744 QEMU_PPC_FEATURE_HAS_4xxMAC
= 0x02000000,
745 QEMU_PPC_FEATURE_UNIFIED_CACHE
= 0x01000000,
746 QEMU_PPC_FEATURE_HAS_SPE
= 0x00800000,
747 QEMU_PPC_FEATURE_HAS_EFP_SINGLE
= 0x00400000,
748 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE
= 0x00200000,
749 QEMU_PPC_FEATURE_NO_TB
= 0x00100000,
750 QEMU_PPC_FEATURE_POWER4
= 0x00080000,
751 QEMU_PPC_FEATURE_POWER5
= 0x00040000,
752 QEMU_PPC_FEATURE_POWER5_PLUS
= 0x00020000,
753 QEMU_PPC_FEATURE_CELL
= 0x00010000,
754 QEMU_PPC_FEATURE_BOOKE
= 0x00008000,
755 QEMU_PPC_FEATURE_SMT
= 0x00004000,
756 QEMU_PPC_FEATURE_ICACHE_SNOOP
= 0x00002000,
757 QEMU_PPC_FEATURE_ARCH_2_05
= 0x00001000,
758 QEMU_PPC_FEATURE_PA6T
= 0x00000800,
759 QEMU_PPC_FEATURE_HAS_DFP
= 0x00000400,
760 QEMU_PPC_FEATURE_POWER6_EXT
= 0x00000200,
761 QEMU_PPC_FEATURE_ARCH_2_06
= 0x00000100,
762 QEMU_PPC_FEATURE_HAS_VSX
= 0x00000080,
763 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT
= 0x00000040,
765 QEMU_PPC_FEATURE_TRUE_LE
= 0x00000002,
766 QEMU_PPC_FEATURE_PPC_LE
= 0x00000001,
768 /* Feature definitions in AT_HWCAP2. */
769 QEMU_PPC_FEATURE2_ARCH_2_07
= 0x80000000, /* ISA 2.07 */
770 QEMU_PPC_FEATURE2_HAS_HTM
= 0x40000000, /* Hardware Transactional Memory */
771 QEMU_PPC_FEATURE2_HAS_DSCR
= 0x20000000, /* Data Stream Control Register */
772 QEMU_PPC_FEATURE2_HAS_EBB
= 0x10000000, /* Event Base Branching */
773 QEMU_PPC_FEATURE2_HAS_ISEL
= 0x08000000, /* Integer Select */
774 QEMU_PPC_FEATURE2_HAS_TAR
= 0x04000000, /* Target Address Register */
775 QEMU_PPC_FEATURE2_VEC_CRYPTO
= 0x02000000,
776 QEMU_PPC_FEATURE2_HTM_NOSC
= 0x01000000,
777 QEMU_PPC_FEATURE2_ARCH_3_00
= 0x00800000, /* ISA 3.00 */
778 QEMU_PPC_FEATURE2_HAS_IEEE128
= 0x00400000, /* VSX IEEE Bin Float 128-bit */
779 QEMU_PPC_FEATURE2_DARN
= 0x00200000, /* darn random number insn */
780 QEMU_PPC_FEATURE2_SCV
= 0x00100000, /* scv syscall */
781 QEMU_PPC_FEATURE2_HTM_NO_SUSPEND
= 0x00080000, /* TM w/o suspended state */
782 QEMU_PPC_FEATURE2_ARCH_3_1
= 0x00040000, /* ISA 3.1 */
783 QEMU_PPC_FEATURE2_MMA
= 0x00020000, /* Matrix-Multiply Assist */
786 #define ELF_HWCAP get_elf_hwcap()
788 static uint32_t get_elf_hwcap(void)
790 PowerPCCPU
*cpu
= POWERPC_CPU(thread_cpu
);
791 uint32_t features
= 0;
793 /* We don't have to be terribly complete here; the high points are
794 Altivec/FP/SPE support. Anything else is just a bonus. */
795 #define GET_FEATURE(flag, feature) \
796 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
797 #define GET_FEATURE2(flags, feature) \
799 if ((cpu->env.insns_flags2 & flags) == flags) { \
800 features |= feature; \
803 GET_FEATURE(PPC_64B
, QEMU_PPC_FEATURE_64
);
804 GET_FEATURE(PPC_FLOAT
, QEMU_PPC_FEATURE_HAS_FPU
);
805 GET_FEATURE(PPC_ALTIVEC
, QEMU_PPC_FEATURE_HAS_ALTIVEC
);
806 GET_FEATURE(PPC_SPE
, QEMU_PPC_FEATURE_HAS_SPE
);
807 GET_FEATURE(PPC_SPE_SINGLE
, QEMU_PPC_FEATURE_HAS_EFP_SINGLE
);
808 GET_FEATURE(PPC_SPE_DOUBLE
, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE
);
809 GET_FEATURE(PPC_BOOKE
, QEMU_PPC_FEATURE_BOOKE
);
810 GET_FEATURE(PPC_405_MAC
, QEMU_PPC_FEATURE_HAS_4xxMAC
);
811 GET_FEATURE2(PPC2_DFP
, QEMU_PPC_FEATURE_HAS_DFP
);
812 GET_FEATURE2(PPC2_VSX
, QEMU_PPC_FEATURE_HAS_VSX
);
813 GET_FEATURE2((PPC2_PERM_ISA206
| PPC2_DIVE_ISA206
| PPC2_ATOMIC_ISA206
|
814 PPC2_FP_CVT_ISA206
| PPC2_FP_TST_ISA206
),
815 QEMU_PPC_FEATURE_ARCH_2_06
);
822 #define ELF_HWCAP2 get_elf_hwcap2()
824 static uint32_t get_elf_hwcap2(void)
826 PowerPCCPU
*cpu
= POWERPC_CPU(thread_cpu
);
827 uint32_t features
= 0;
829 #define GET_FEATURE(flag, feature) \
830 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
831 #define GET_FEATURE2(flag, feature) \
832 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
834 GET_FEATURE(PPC_ISEL
, QEMU_PPC_FEATURE2_HAS_ISEL
);
835 GET_FEATURE2(PPC2_BCTAR_ISA207
, QEMU_PPC_FEATURE2_HAS_TAR
);
836 GET_FEATURE2((PPC2_BCTAR_ISA207
| PPC2_LSQ_ISA207
| PPC2_ALTIVEC_207
|
837 PPC2_ISA207S
), QEMU_PPC_FEATURE2_ARCH_2_07
|
838 QEMU_PPC_FEATURE2_VEC_CRYPTO
);
839 GET_FEATURE2(PPC2_ISA300
, QEMU_PPC_FEATURE2_ARCH_3_00
|
840 QEMU_PPC_FEATURE2_DARN
| QEMU_PPC_FEATURE2_HAS_IEEE128
);
841 GET_FEATURE2(PPC2_ISA310
, QEMU_PPC_FEATURE2_ARCH_3_1
|
842 QEMU_PPC_FEATURE2_MMA
);
851 * The requirements here are:
852 * - keep the final alignment of sp (sp & 0xf)
853 * - make sure the 32-bit value at the first 16 byte aligned position of
854 * AUXV is greater than 16 for glibc compatibility.
855 * AT_IGNOREPPC is used for that.
856 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
857 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
859 #define DLINFO_ARCH_ITEMS 5
860 #define ARCH_DLINFO \
862 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
864 * Handle glibc compatibility: these magic entries must \
865 * be at the lowest addresses in the final auxv. \
867 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
868 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
869 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
870 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
871 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
874 static inline void init_thread(struct target_pt_regs
*_regs
, struct image_info
*infop
)
876 _regs
->gpr
[1] = infop
->start_stack
;
877 #if defined(TARGET_PPC64)
878 if (get_ppc64_abi(infop
) < 2) {
880 get_user_u64(val
, infop
->entry
+ 8);
881 _regs
->gpr
[2] = val
+ infop
->load_bias
;
882 get_user_u64(val
, infop
->entry
);
883 infop
->entry
= val
+ infop
->load_bias
;
885 _regs
->gpr
[12] = infop
->entry
; /* r12 set to global entry address */
888 _regs
->nip
= infop
->entry
;
891 /* See linux kernel: arch/powerpc/include/asm/elf.h. */
893 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
895 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUPPCState
*env
)
898 target_ulong ccr
= 0;
900 for (i
= 0; i
< ARRAY_SIZE(env
->gpr
); i
++) {
901 (*regs
)[i
] = tswapreg(env
->gpr
[i
]);
904 (*regs
)[32] = tswapreg(env
->nip
);
905 (*regs
)[33] = tswapreg(env
->msr
);
906 (*regs
)[35] = tswapreg(env
->ctr
);
907 (*regs
)[36] = tswapreg(env
->lr
);
908 (*regs
)[37] = tswapreg(cpu_read_xer(env
));
910 for (i
= 0; i
< ARRAY_SIZE(env
->crf
); i
++) {
911 ccr
|= env
->crf
[i
] << (32 - ((i
+ 1) * 4));
913 (*regs
)[38] = tswapreg(ccr
);
916 #define USE_ELF_CORE_DUMP
917 #define ELF_EXEC_PAGESIZE 4096
923 #define ELF_START_MMAP 0x80000000
926 #define ELF_CLASS ELFCLASS64
928 #define ELF_CLASS ELFCLASS32
930 #define ELF_ARCH EM_MIPS
932 #ifdef TARGET_ABI_MIPSN32
933 #define elf_check_abi(x) ((x) & EF_MIPS_ABI2)
935 #define elf_check_abi(x) (!((x) & EF_MIPS_ABI2))
938 static inline void init_thread(struct target_pt_regs
*regs
,
939 struct image_info
*infop
)
941 regs
->cp0_status
= 2 << CP0St_KSU
;
942 regs
->cp0_epc
= infop
->entry
;
943 regs
->regs
[29] = infop
->start_stack
;
946 /* See linux kernel: arch/mips/include/asm/elf.h. */
948 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
950 /* See linux kernel: arch/mips/include/asm/reg.h. */
957 TARGET_EF_R26
= TARGET_EF_R0
+ 26,
958 TARGET_EF_R27
= TARGET_EF_R0
+ 27,
959 TARGET_EF_LO
= TARGET_EF_R0
+ 32,
960 TARGET_EF_HI
= TARGET_EF_R0
+ 33,
961 TARGET_EF_CP0_EPC
= TARGET_EF_R0
+ 34,
962 TARGET_EF_CP0_BADVADDR
= TARGET_EF_R0
+ 35,
963 TARGET_EF_CP0_STATUS
= TARGET_EF_R0
+ 36,
964 TARGET_EF_CP0_CAUSE
= TARGET_EF_R0
+ 37
967 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
968 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUMIPSState
*env
)
972 for (i
= 0; i
< TARGET_EF_R0
; i
++) {
975 (*regs
)[TARGET_EF_R0
] = 0;
977 for (i
= 1; i
< ARRAY_SIZE(env
->active_tc
.gpr
); i
++) {
978 (*regs
)[TARGET_EF_R0
+ i
] = tswapreg(env
->active_tc
.gpr
[i
]);
981 (*regs
)[TARGET_EF_R26
] = 0;
982 (*regs
)[TARGET_EF_R27
] = 0;
983 (*regs
)[TARGET_EF_LO
] = tswapreg(env
->active_tc
.LO
[0]);
984 (*regs
)[TARGET_EF_HI
] = tswapreg(env
->active_tc
.HI
[0]);
985 (*regs
)[TARGET_EF_CP0_EPC
] = tswapreg(env
->active_tc
.PC
);
986 (*regs
)[TARGET_EF_CP0_BADVADDR
] = tswapreg(env
->CP0_BadVAddr
);
987 (*regs
)[TARGET_EF_CP0_STATUS
] = tswapreg(env
->CP0_Status
);
988 (*regs
)[TARGET_EF_CP0_CAUSE
] = tswapreg(env
->CP0_Cause
);
991 #define USE_ELF_CORE_DUMP
992 #define ELF_EXEC_PAGESIZE 4096
994 /* See arch/mips/include/uapi/asm/hwcap.h. */
996 HWCAP_MIPS_R6
= (1 << 0),
997 HWCAP_MIPS_MSA
= (1 << 1),
998 HWCAP_MIPS_CRC32
= (1 << 2),
999 HWCAP_MIPS_MIPS16
= (1 << 3),
1000 HWCAP_MIPS_MDMX
= (1 << 4),
1001 HWCAP_MIPS_MIPS3D
= (1 << 5),
1002 HWCAP_MIPS_SMARTMIPS
= (1 << 6),
1003 HWCAP_MIPS_DSP
= (1 << 7),
1004 HWCAP_MIPS_DSP2
= (1 << 8),
1005 HWCAP_MIPS_DSP3
= (1 << 9),
1006 HWCAP_MIPS_MIPS16E2
= (1 << 10),
1007 HWCAP_LOONGSON_MMI
= (1 << 11),
1008 HWCAP_LOONGSON_EXT
= (1 << 12),
1009 HWCAP_LOONGSON_EXT2
= (1 << 13),
1010 HWCAP_LOONGSON_CPUCFG
= (1 << 14),
1013 #define ELF_HWCAP get_elf_hwcap()
1015 #define GET_FEATURE_INSN(_flag, _hwcap) \
1016 do { if (cpu->env.insn_flags & (_flag)) { hwcaps |= _hwcap; } } while (0)
1018 #define GET_FEATURE_REG_SET(_reg, _mask, _hwcap) \
1019 do { if (cpu->env._reg & (_mask)) { hwcaps |= _hwcap; } } while (0)
1021 #define GET_FEATURE_REG_EQU(_reg, _start, _length, _val, _hwcap) \
1023 if (extract32(cpu->env._reg, (_start), (_length)) == (_val)) { \
1028 static uint32_t get_elf_hwcap(void)
1030 MIPSCPU
*cpu
= MIPS_CPU(thread_cpu
);
1031 uint32_t hwcaps
= 0;
1033 GET_FEATURE_REG_EQU(CP0_Config0
, CP0C0_AR
, CP0C0_AR_LENGTH
,
1035 GET_FEATURE_REG_SET(CP0_Config3
, 1 << CP0C3_MSAP
, HWCAP_MIPS_MSA
);
1036 GET_FEATURE_INSN(ASE_LMMI
, HWCAP_LOONGSON_MMI
);
1037 GET_FEATURE_INSN(ASE_LEXT
, HWCAP_LOONGSON_EXT
);
1042 #undef GET_FEATURE_REG_EQU
1043 #undef GET_FEATURE_REG_SET
1044 #undef GET_FEATURE_INSN
1046 #endif /* TARGET_MIPS */
1048 #ifdef TARGET_MICROBLAZE
1050 #define ELF_START_MMAP 0x80000000
1052 #define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
1054 #define ELF_CLASS ELFCLASS32
1055 #define ELF_ARCH EM_MICROBLAZE
1057 static inline void init_thread(struct target_pt_regs
*regs
,
1058 struct image_info
*infop
)
1060 regs
->pc
= infop
->entry
;
1061 regs
->r1
= infop
->start_stack
;
1065 #define ELF_EXEC_PAGESIZE 4096
1067 #define USE_ELF_CORE_DUMP
1069 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1071 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1072 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUMBState
*env
)
1076 for (i
= 0; i
< 32; i
++) {
1077 (*regs
)[pos
++] = tswapreg(env
->regs
[i
]);
1080 (*regs
)[pos
++] = tswapreg(env
->pc
);
1081 (*regs
)[pos
++] = tswapreg(mb_cpu_read_msr(env
));
1083 (*regs
)[pos
++] = tswapreg(env
->ear
);
1085 (*regs
)[pos
++] = tswapreg(env
->esr
);
1088 #endif /* TARGET_MICROBLAZE */
1092 #define ELF_START_MMAP 0x80000000
1094 #define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
1096 #define ELF_CLASS ELFCLASS32
1097 #define ELF_ARCH EM_ALTERA_NIOS2
1099 static void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
1101 regs
->ea
= infop
->entry
;
1102 regs
->sp
= infop
->start_stack
;
1105 #define LO_COMMPAGE TARGET_PAGE_SIZE
1107 static bool init_guest_commpage(void)
1109 static const uint8_t kuser_page
[4 + 2 * 64] = {
1110 /* __kuser_helper_version */
1111 [0x00] = 0x02, 0x00, 0x00, 0x00,
1113 /* __kuser_cmpxchg */
1114 [0x04] = 0x3a, 0x6c, 0x3b, 0x00, /* trap 16 */
1115 0x3a, 0x28, 0x00, 0xf8, /* ret */
1117 /* __kuser_sigtramp */
1118 [0x44] = 0xc4, 0x22, 0x80, 0x00, /* movi r2, __NR_rt_sigreturn */
1119 0x3a, 0x68, 0x3b, 0x00, /* trap 0 */
1122 void *want
= g2h_untagged(LO_COMMPAGE
& -qemu_host_page_size
);
1123 void *addr
= mmap(want
, qemu_host_page_size
, PROT_READ
| PROT_WRITE
,
1124 MAP_ANONYMOUS
| MAP_PRIVATE
| MAP_FIXED
, -1, 0);
1126 if (addr
== MAP_FAILED
) {
1127 perror("Allocating guest commpage");
1134 memcpy(addr
, kuser_page
, sizeof(kuser_page
));
1136 if (mprotect(addr
, qemu_host_page_size
, PROT_READ
)) {
1137 perror("Protecting guest commpage");
1141 page_set_flags(LO_COMMPAGE
, LO_COMMPAGE
+ TARGET_PAGE_SIZE
,
1142 PAGE_READ
| PAGE_EXEC
| PAGE_VALID
);
1146 #define ELF_EXEC_PAGESIZE 4096
1148 #define USE_ELF_CORE_DUMP
1150 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1152 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1153 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1154 const CPUNios2State
*env
)
1159 for (i
= 1; i
< 8; i
++) /* r0-r7 */
1160 (*regs
)[i
] = tswapreg(env
->regs
[i
+ 7]);
1162 for (i
= 8; i
< 16; i
++) /* r8-r15 */
1163 (*regs
)[i
] = tswapreg(env
->regs
[i
- 8]);
1165 for (i
= 16; i
< 24; i
++) /* r16-r23 */
1166 (*regs
)[i
] = tswapreg(env
->regs
[i
+ 7]);
1167 (*regs
)[24] = -1; /* R_ET */
1168 (*regs
)[25] = -1; /* R_BT */
1169 (*regs
)[26] = tswapreg(env
->regs
[R_GP
]);
1170 (*regs
)[27] = tswapreg(env
->regs
[R_SP
]);
1171 (*regs
)[28] = tswapreg(env
->regs
[R_FP
]);
1172 (*regs
)[29] = tswapreg(env
->regs
[R_EA
]);
1173 (*regs
)[30] = -1; /* R_SSTATUS */
1174 (*regs
)[31] = tswapreg(env
->regs
[R_RA
]);
1176 (*regs
)[32] = tswapreg(env
->pc
);
1178 (*regs
)[33] = -1; /* R_STATUS */
1179 (*regs
)[34] = tswapreg(env
->regs
[CR_ESTATUS
]);
1181 for (i
= 35; i
< 49; i
++) /* ... */
1185 #endif /* TARGET_NIOS2 */
1187 #ifdef TARGET_OPENRISC
1189 #define ELF_START_MMAP 0x08000000
1191 #define ELF_ARCH EM_OPENRISC
1192 #define ELF_CLASS ELFCLASS32
1193 #define ELF_DATA ELFDATA2MSB
1195 static inline void init_thread(struct target_pt_regs
*regs
,
1196 struct image_info
*infop
)
1198 regs
->pc
= infop
->entry
;
1199 regs
->gpr
[1] = infop
->start_stack
;
1202 #define USE_ELF_CORE_DUMP
1203 #define ELF_EXEC_PAGESIZE 8192
1205 /* See linux kernel arch/openrisc/include/asm/elf.h. */
1206 #define ELF_NREG 34 /* gprs and pc, sr */
1207 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1209 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1210 const CPUOpenRISCState
*env
)
1214 for (i
= 0; i
< 32; i
++) {
1215 (*regs
)[i
] = tswapreg(cpu_get_gpr(env
, i
));
1217 (*regs
)[32] = tswapreg(env
->pc
);
1218 (*regs
)[33] = tswapreg(cpu_get_sr(env
));
1221 #define ELF_PLATFORM NULL
1223 #endif /* TARGET_OPENRISC */
1227 #define ELF_START_MMAP 0x80000000
1229 #define ELF_CLASS ELFCLASS32
1230 #define ELF_ARCH EM_SH
1232 static inline void init_thread(struct target_pt_regs
*regs
,
1233 struct image_info
*infop
)
1235 /* Check other registers XXXXX */
1236 regs
->pc
= infop
->entry
;
1237 regs
->regs
[15] = infop
->start_stack
;
1240 /* See linux kernel: arch/sh/include/asm/elf.h. */
1242 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1244 /* See linux kernel: arch/sh/include/asm/ptrace.h. */
1249 TARGET_REG_GBR
= 19,
1250 TARGET_REG_MACH
= 20,
1251 TARGET_REG_MACL
= 21,
1252 TARGET_REG_SYSCALL
= 22
1255 static inline void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1256 const CPUSH4State
*env
)
1260 for (i
= 0; i
< 16; i
++) {
1261 (*regs
)[i
] = tswapreg(env
->gregs
[i
]);
1264 (*regs
)[TARGET_REG_PC
] = tswapreg(env
->pc
);
1265 (*regs
)[TARGET_REG_PR
] = tswapreg(env
->pr
);
1266 (*regs
)[TARGET_REG_SR
] = tswapreg(env
->sr
);
1267 (*regs
)[TARGET_REG_GBR
] = tswapreg(env
->gbr
);
1268 (*regs
)[TARGET_REG_MACH
] = tswapreg(env
->mach
);
1269 (*regs
)[TARGET_REG_MACL
] = tswapreg(env
->macl
);
1270 (*regs
)[TARGET_REG_SYSCALL
] = 0; /* FIXME */
1273 #define USE_ELF_CORE_DUMP
1274 #define ELF_EXEC_PAGESIZE 4096
1277 SH_CPU_HAS_FPU
= 0x0001, /* Hardware FPU support */
1278 SH_CPU_HAS_P2_FLUSH_BUG
= 0x0002, /* Need to flush the cache in P2 area */
1279 SH_CPU_HAS_MMU_PAGE_ASSOC
= 0x0004, /* SH3: TLB way selection bit support */
1280 SH_CPU_HAS_DSP
= 0x0008, /* SH-DSP: DSP support */
1281 SH_CPU_HAS_PERF_COUNTER
= 0x0010, /* Hardware performance counters */
1282 SH_CPU_HAS_PTEA
= 0x0020, /* PTEA register */
1283 SH_CPU_HAS_LLSC
= 0x0040, /* movli.l/movco.l */
1284 SH_CPU_HAS_L2_CACHE
= 0x0080, /* Secondary cache / URAM */
1285 SH_CPU_HAS_OP32
= 0x0100, /* 32-bit instruction support */
1286 SH_CPU_HAS_PTEAEX
= 0x0200, /* PTE ASID Extension support */
1289 #define ELF_HWCAP get_elf_hwcap()
1291 static uint32_t get_elf_hwcap(void)
1293 SuperHCPU
*cpu
= SUPERH_CPU(thread_cpu
);
1296 hwcap
|= SH_CPU_HAS_FPU
;
1298 if (cpu
->env
.features
& SH_FEATURE_SH4A
) {
1299 hwcap
|= SH_CPU_HAS_LLSC
;
1309 #define ELF_START_MMAP 0x80000000
1311 #define ELF_CLASS ELFCLASS32
1312 #define ELF_ARCH EM_CRIS
1314 static inline void init_thread(struct target_pt_regs
*regs
,
1315 struct image_info
*infop
)
1317 regs
->erp
= infop
->entry
;
1320 #define ELF_EXEC_PAGESIZE 8192
1326 #define ELF_START_MMAP 0x80000000
1328 #define ELF_CLASS ELFCLASS32
1329 #define ELF_ARCH EM_68K
1331 /* ??? Does this need to do anything?
1332 #define ELF_PLAT_INIT(_r) */
1334 static inline void init_thread(struct target_pt_regs
*regs
,
1335 struct image_info
*infop
)
1337 regs
->usp
= infop
->start_stack
;
1339 regs
->pc
= infop
->entry
;
1342 /* See linux kernel: arch/m68k/include/asm/elf.h. */
1344 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1346 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUM68KState
*env
)
1348 (*regs
)[0] = tswapreg(env
->dregs
[1]);
1349 (*regs
)[1] = tswapreg(env
->dregs
[2]);
1350 (*regs
)[2] = tswapreg(env
->dregs
[3]);
1351 (*regs
)[3] = tswapreg(env
->dregs
[4]);
1352 (*regs
)[4] = tswapreg(env
->dregs
[5]);
1353 (*regs
)[5] = tswapreg(env
->dregs
[6]);
1354 (*regs
)[6] = tswapreg(env
->dregs
[7]);
1355 (*regs
)[7] = tswapreg(env
->aregs
[0]);
1356 (*regs
)[8] = tswapreg(env
->aregs
[1]);
1357 (*regs
)[9] = tswapreg(env
->aregs
[2]);
1358 (*regs
)[10] = tswapreg(env
->aregs
[3]);
1359 (*regs
)[11] = tswapreg(env
->aregs
[4]);
1360 (*regs
)[12] = tswapreg(env
->aregs
[5]);
1361 (*regs
)[13] = tswapreg(env
->aregs
[6]);
1362 (*regs
)[14] = tswapreg(env
->dregs
[0]);
1363 (*regs
)[15] = tswapreg(env
->aregs
[7]);
1364 (*regs
)[16] = tswapreg(env
->dregs
[0]); /* FIXME: orig_d0 */
1365 (*regs
)[17] = tswapreg(env
->sr
);
1366 (*regs
)[18] = tswapreg(env
->pc
);
1367 (*regs
)[19] = 0; /* FIXME: regs->format | regs->vector */
1370 #define USE_ELF_CORE_DUMP
1371 #define ELF_EXEC_PAGESIZE 8192
1377 #define ELF_START_MMAP (0x30000000000ULL)
1379 #define ELF_CLASS ELFCLASS64
1380 #define ELF_ARCH EM_ALPHA
1382 static inline void init_thread(struct target_pt_regs
*regs
,
1383 struct image_info
*infop
)
1385 regs
->pc
= infop
->entry
;
1387 regs
->usp
= infop
->start_stack
;
1390 #define ELF_EXEC_PAGESIZE 8192
1392 #endif /* TARGET_ALPHA */
1396 #define ELF_START_MMAP (0x20000000000ULL)
1398 #define ELF_CLASS ELFCLASS64
1399 #define ELF_DATA ELFDATA2MSB
1400 #define ELF_ARCH EM_S390
1404 #define ELF_HWCAP get_elf_hwcap()
1406 #define GET_FEATURE(_feat, _hwcap) \
1407 do { if (s390_has_feat(_feat)) { hwcap |= _hwcap; } } while (0)
1409 static uint32_t get_elf_hwcap(void)
1412 * Let's assume we always have esan3 and zarch.
1413 * 31-bit processes can use 64-bit registers (high gprs).
1415 uint32_t hwcap
= HWCAP_S390_ESAN3
| HWCAP_S390_ZARCH
| HWCAP_S390_HIGH_GPRS
;
1417 GET_FEATURE(S390_FEAT_STFLE
, HWCAP_S390_STFLE
);
1418 GET_FEATURE(S390_FEAT_MSA
, HWCAP_S390_MSA
);
1419 GET_FEATURE(S390_FEAT_LONG_DISPLACEMENT
, HWCAP_S390_LDISP
);
1420 GET_FEATURE(S390_FEAT_EXTENDED_IMMEDIATE
, HWCAP_S390_EIMM
);
1421 if (s390_has_feat(S390_FEAT_EXTENDED_TRANSLATION_3
) &&
1422 s390_has_feat(S390_FEAT_ETF3_ENH
)) {
1423 hwcap
|= HWCAP_S390_ETF3EH
;
1425 GET_FEATURE(S390_FEAT_VECTOR
, HWCAP_S390_VXRS
);
1426 GET_FEATURE(S390_FEAT_VECTOR_ENH
, HWCAP_S390_VXRS_EXT
);
1431 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
1433 regs
->psw
.addr
= infop
->entry
;
1434 regs
->psw
.mask
= PSW_MASK_64
| PSW_MASK_32
;
1435 regs
->gprs
[15] = infop
->start_stack
;
1438 /* See linux kernel: arch/s390/include/uapi/asm/ptrace.h (s390_regs). */
1440 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1443 TARGET_REG_PSWM
= 0,
1444 TARGET_REG_PSWA
= 1,
1445 TARGET_REG_GPRS
= 2,
1446 TARGET_REG_ARS
= 18,
1447 TARGET_REG_ORIG_R2
= 26,
1450 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1451 const CPUS390XState
*env
)
1456 (*regs
)[TARGET_REG_PSWM
] = tswapreg(env
->psw
.mask
);
1457 (*regs
)[TARGET_REG_PSWA
] = tswapreg(env
->psw
.addr
);
1458 for (i
= 0; i
< 16; i
++) {
1459 (*regs
)[TARGET_REG_GPRS
+ i
] = tswapreg(env
->regs
[i
]);
1461 aregs
= (uint32_t *)&((*regs
)[TARGET_REG_ARS
]);
1462 for (i
= 0; i
< 16; i
++) {
1463 aregs
[i
] = tswap32(env
->aregs
[i
]);
1465 (*regs
)[TARGET_REG_ORIG_R2
] = 0;
1468 #define USE_ELF_CORE_DUMP
1469 #define ELF_EXEC_PAGESIZE 4096
1471 #endif /* TARGET_S390X */
1475 #define ELF_START_MMAP 0x80000000
1476 #define ELF_ARCH EM_RISCV
1478 #ifdef TARGET_RISCV32
1479 #define ELF_CLASS ELFCLASS32
1481 #define ELF_CLASS ELFCLASS64
1484 #define ELF_HWCAP get_elf_hwcap()
1486 static uint32_t get_elf_hwcap(void)
1488 #define MISA_BIT(EXT) (1 << (EXT - 'A'))
1489 RISCVCPU
*cpu
= RISCV_CPU(thread_cpu
);
1490 uint32_t mask
= MISA_BIT('I') | MISA_BIT('M') | MISA_BIT('A')
1491 | MISA_BIT('F') | MISA_BIT('D') | MISA_BIT('C');
1493 return cpu
->env
.misa_ext
& mask
;
1497 static inline void init_thread(struct target_pt_regs
*regs
,
1498 struct image_info
*infop
)
1500 regs
->sepc
= infop
->entry
;
1501 regs
->sp
= infop
->start_stack
;
1504 #define ELF_EXEC_PAGESIZE 4096
1506 #endif /* TARGET_RISCV */
1510 #define ELF_START_MMAP 0x80000000
1511 #define ELF_CLASS ELFCLASS32
1512 #define ELF_ARCH EM_PARISC
1513 #define ELF_PLATFORM "PARISC"
1514 #define STACK_GROWS_DOWN 0
1515 #define STACK_ALIGNMENT 64
1517 static inline void init_thread(struct target_pt_regs
*regs
,
1518 struct image_info
*infop
)
1520 regs
->iaoq
[0] = infop
->entry
;
1521 regs
->iaoq
[1] = infop
->entry
+ 4;
1523 regs
->gr
[24] = infop
->argv
;
1524 regs
->gr
[25] = infop
->argc
;
1525 /* The top-of-stack contains a linkage buffer. */
1526 regs
->gr
[30] = infop
->start_stack
+ 64;
1527 regs
->gr
[31] = infop
->entry
;
1530 #endif /* TARGET_HPPA */
1532 #ifdef TARGET_XTENSA
1534 #define ELF_START_MMAP 0x20000000
1536 #define ELF_CLASS ELFCLASS32
1537 #define ELF_ARCH EM_XTENSA
1539 static inline void init_thread(struct target_pt_regs
*regs
,
1540 struct image_info
*infop
)
1542 regs
->windowbase
= 0;
1543 regs
->windowstart
= 1;
1544 regs
->areg
[1] = infop
->start_stack
;
1545 regs
->pc
= infop
->entry
;
1548 /* See linux kernel: arch/xtensa/include/asm/elf.h. */
1549 #define ELF_NREG 128
1550 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1559 TARGET_REG_WINDOWSTART
,
1560 TARGET_REG_WINDOWBASE
,
1561 TARGET_REG_THREADPTR
,
1562 TARGET_REG_AR0
= 64,
1565 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1566 const CPUXtensaState
*env
)
1570 (*regs
)[TARGET_REG_PC
] = tswapreg(env
->pc
);
1571 (*regs
)[TARGET_REG_PS
] = tswapreg(env
->sregs
[PS
] & ~PS_EXCM
);
1572 (*regs
)[TARGET_REG_LBEG
] = tswapreg(env
->sregs
[LBEG
]);
1573 (*regs
)[TARGET_REG_LEND
] = tswapreg(env
->sregs
[LEND
]);
1574 (*regs
)[TARGET_REG_LCOUNT
] = tswapreg(env
->sregs
[LCOUNT
]);
1575 (*regs
)[TARGET_REG_SAR
] = tswapreg(env
->sregs
[SAR
]);
1576 (*regs
)[TARGET_REG_WINDOWSTART
] = tswapreg(env
->sregs
[WINDOW_START
]);
1577 (*regs
)[TARGET_REG_WINDOWBASE
] = tswapreg(env
->sregs
[WINDOW_BASE
]);
1578 (*regs
)[TARGET_REG_THREADPTR
] = tswapreg(env
->uregs
[THREADPTR
]);
1579 xtensa_sync_phys_from_window((CPUXtensaState
*)env
);
1580 for (i
= 0; i
< env
->config
->nareg
; ++i
) {
1581 (*regs
)[TARGET_REG_AR0
+ i
] = tswapreg(env
->phys_regs
[i
]);
1585 #define USE_ELF_CORE_DUMP
1586 #define ELF_EXEC_PAGESIZE 4096
1588 #endif /* TARGET_XTENSA */
1590 #ifdef TARGET_HEXAGON
1592 #define ELF_START_MMAP 0x20000000
1594 #define ELF_CLASS ELFCLASS32
1595 #define ELF_ARCH EM_HEXAGON
1597 static inline void init_thread(struct target_pt_regs
*regs
,
1598 struct image_info
*infop
)
1600 regs
->sepc
= infop
->entry
;
1601 regs
->sp
= infop
->start_stack
;
1604 #endif /* TARGET_HEXAGON */
1606 #ifndef ELF_PLATFORM
1607 #define ELF_PLATFORM (NULL)
1611 #define ELF_MACHINE ELF_ARCH
1614 #ifndef elf_check_arch
1615 #define elf_check_arch(x) ((x) == ELF_ARCH)
1618 #ifndef elf_check_abi
1619 #define elf_check_abi(x) (1)
1626 #ifndef STACK_GROWS_DOWN
1627 #define STACK_GROWS_DOWN 1
1630 #ifndef STACK_ALIGNMENT
1631 #define STACK_ALIGNMENT 16
1636 #define ELF_CLASS ELFCLASS32
1638 #define bswaptls(ptr) bswap32s(ptr)
1643 /* We must delay the following stanzas until after "elf.h". */
1644 #if defined(TARGET_AARCH64)
1646 static bool arch_parse_elf_property(uint32_t pr_type
, uint32_t pr_datasz
,
1647 const uint32_t *data
,
1648 struct image_info
*info
,
1651 if (pr_type
== GNU_PROPERTY_AARCH64_FEATURE_1_AND
) {
1652 if (pr_datasz
!= sizeof(uint32_t)) {
1653 error_setg(errp
, "Ill-formed GNU_PROPERTY_AARCH64_FEATURE_1_AND");
1656 /* We will extract GNU_PROPERTY_AARCH64_FEATURE_1_BTI later. */
1657 info
->note_flags
= *data
;
1661 #define ARCH_USE_GNU_PROPERTY 1
1665 static bool arch_parse_elf_property(uint32_t pr_type
, uint32_t pr_datasz
,
1666 const uint32_t *data
,
1667 struct image_info
*info
,
1670 g_assert_not_reached();
1672 #define ARCH_USE_GNU_PROPERTY 0
1678 unsigned int a_info
; /* Use macros N_MAGIC, etc for access */
1679 unsigned int a_text
; /* length of text, in bytes */
1680 unsigned int a_data
; /* length of data, in bytes */
1681 unsigned int a_bss
; /* length of uninitialized data area, in bytes */
1682 unsigned int a_syms
; /* length of symbol table data in file, in bytes */
1683 unsigned int a_entry
; /* start address */
1684 unsigned int a_trsize
; /* length of relocation info for text, in bytes */
1685 unsigned int a_drsize
; /* length of relocation info for data, in bytes */
1689 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
1695 /* Necessary parameters */
1696 #define TARGET_ELF_EXEC_PAGESIZE \
1697 (((eppnt->p_align & ~qemu_host_page_mask) != 0) ? \
1698 TARGET_PAGE_SIZE : MAX(qemu_host_page_size, TARGET_PAGE_SIZE))
1699 #define TARGET_ELF_PAGELENGTH(_v) ROUND_UP((_v), TARGET_ELF_EXEC_PAGESIZE)
1700 #define TARGET_ELF_PAGESTART(_v) ((_v) & \
1701 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
1702 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
1704 #define DLINFO_ITEMS 16
1706 static inline void memcpy_fromfs(void * to
, const void * from
, unsigned long n
)
1708 memcpy(to
, from
, n
);
1712 static void bswap_ehdr(struct elfhdr
*ehdr
)
1714 bswap16s(&ehdr
->e_type
); /* Object file type */
1715 bswap16s(&ehdr
->e_machine
); /* Architecture */
1716 bswap32s(&ehdr
->e_version
); /* Object file version */
1717 bswaptls(&ehdr
->e_entry
); /* Entry point virtual address */
1718 bswaptls(&ehdr
->e_phoff
); /* Program header table file offset */
1719 bswaptls(&ehdr
->e_shoff
); /* Section header table file offset */
1720 bswap32s(&ehdr
->e_flags
); /* Processor-specific flags */
1721 bswap16s(&ehdr
->e_ehsize
); /* ELF header size in bytes */
1722 bswap16s(&ehdr
->e_phentsize
); /* Program header table entry size */
1723 bswap16s(&ehdr
->e_phnum
); /* Program header table entry count */
1724 bswap16s(&ehdr
->e_shentsize
); /* Section header table entry size */
1725 bswap16s(&ehdr
->e_shnum
); /* Section header table entry count */
1726 bswap16s(&ehdr
->e_shstrndx
); /* Section header string table index */
1729 static void bswap_phdr(struct elf_phdr
*phdr
, int phnum
)
1732 for (i
= 0; i
< phnum
; ++i
, ++phdr
) {
1733 bswap32s(&phdr
->p_type
); /* Segment type */
1734 bswap32s(&phdr
->p_flags
); /* Segment flags */
1735 bswaptls(&phdr
->p_offset
); /* Segment file offset */
1736 bswaptls(&phdr
->p_vaddr
); /* Segment virtual address */
1737 bswaptls(&phdr
->p_paddr
); /* Segment physical address */
1738 bswaptls(&phdr
->p_filesz
); /* Segment size in file */
1739 bswaptls(&phdr
->p_memsz
); /* Segment size in memory */
1740 bswaptls(&phdr
->p_align
); /* Segment alignment */
1744 static void bswap_shdr(struct elf_shdr
*shdr
, int shnum
)
1747 for (i
= 0; i
< shnum
; ++i
, ++shdr
) {
1748 bswap32s(&shdr
->sh_name
);
1749 bswap32s(&shdr
->sh_type
);
1750 bswaptls(&shdr
->sh_flags
);
1751 bswaptls(&shdr
->sh_addr
);
1752 bswaptls(&shdr
->sh_offset
);
1753 bswaptls(&shdr
->sh_size
);
1754 bswap32s(&shdr
->sh_link
);
1755 bswap32s(&shdr
->sh_info
);
1756 bswaptls(&shdr
->sh_addralign
);
1757 bswaptls(&shdr
->sh_entsize
);
1761 static void bswap_sym(struct elf_sym
*sym
)
1763 bswap32s(&sym
->st_name
);
1764 bswaptls(&sym
->st_value
);
1765 bswaptls(&sym
->st_size
);
1766 bswap16s(&sym
->st_shndx
);
1770 static void bswap_mips_abiflags(Mips_elf_abiflags_v0
*abiflags
)
1772 bswap16s(&abiflags
->version
);
1773 bswap32s(&abiflags
->ases
);
1774 bswap32s(&abiflags
->isa_ext
);
1775 bswap32s(&abiflags
->flags1
);
1776 bswap32s(&abiflags
->flags2
);
1780 static inline void bswap_ehdr(struct elfhdr
*ehdr
) { }
1781 static inline void bswap_phdr(struct elf_phdr
*phdr
, int phnum
) { }
1782 static inline void bswap_shdr(struct elf_shdr
*shdr
, int shnum
) { }
1783 static inline void bswap_sym(struct elf_sym
*sym
) { }
1785 static inline void bswap_mips_abiflags(Mips_elf_abiflags_v0
*abiflags
) { }
1789 #ifdef USE_ELF_CORE_DUMP
1790 static int elf_core_dump(int, const CPUArchState
*);
1791 #endif /* USE_ELF_CORE_DUMP */
1792 static void load_symbols(struct elfhdr
*hdr
, int fd
, abi_ulong load_bias
);
1794 /* Verify the portions of EHDR within E_IDENT for the target.
1795 This can be performed before bswapping the entire header. */
1796 static bool elf_check_ident(struct elfhdr
*ehdr
)
1798 return (ehdr
->e_ident
[EI_MAG0
] == ELFMAG0
1799 && ehdr
->e_ident
[EI_MAG1
] == ELFMAG1
1800 && ehdr
->e_ident
[EI_MAG2
] == ELFMAG2
1801 && ehdr
->e_ident
[EI_MAG3
] == ELFMAG3
1802 && ehdr
->e_ident
[EI_CLASS
] == ELF_CLASS
1803 && ehdr
->e_ident
[EI_DATA
] == ELF_DATA
1804 && ehdr
->e_ident
[EI_VERSION
] == EV_CURRENT
);
1807 /* Verify the portions of EHDR outside of E_IDENT for the target.
1808 This has to wait until after bswapping the header. */
1809 static bool elf_check_ehdr(struct elfhdr
*ehdr
)
1811 return (elf_check_arch(ehdr
->e_machine
)
1812 && elf_check_abi(ehdr
->e_flags
)
1813 && ehdr
->e_ehsize
== sizeof(struct elfhdr
)
1814 && ehdr
->e_phentsize
== sizeof(struct elf_phdr
)
1815 && (ehdr
->e_type
== ET_EXEC
|| ehdr
->e_type
== ET_DYN
));
1819 * 'copy_elf_strings()' copies argument/envelope strings from user
1820 * memory to free pages in kernel mem. These are in a format ready
1821 * to be put directly into the top of new user memory.
1824 static abi_ulong
copy_elf_strings(int argc
, char **argv
, char *scratch
,
1825 abi_ulong p
, abi_ulong stack_limit
)
1832 return 0; /* bullet-proofing */
1835 if (STACK_GROWS_DOWN
) {
1836 int offset
= ((p
- 1) % TARGET_PAGE_SIZE
) + 1;
1837 for (i
= argc
- 1; i
>= 0; --i
) {
1840 fprintf(stderr
, "VFS: argc is wrong");
1843 len
= strlen(tmp
) + 1;
1846 if (len
> (p
- stack_limit
)) {
1850 int bytes_to_copy
= (len
> offset
) ? offset
: len
;
1851 tmp
-= bytes_to_copy
;
1853 offset
-= bytes_to_copy
;
1854 len
-= bytes_to_copy
;
1856 memcpy_fromfs(scratch
+ offset
, tmp
, bytes_to_copy
);
1859 memcpy_to_target(p
, scratch
, top
- p
);
1861 offset
= TARGET_PAGE_SIZE
;
1866 memcpy_to_target(p
, scratch
+ offset
, top
- p
);
1869 int remaining
= TARGET_PAGE_SIZE
- (p
% TARGET_PAGE_SIZE
);
1870 for (i
= 0; i
< argc
; ++i
) {
1873 fprintf(stderr
, "VFS: argc is wrong");
1876 len
= strlen(tmp
) + 1;
1877 if (len
> (stack_limit
- p
)) {
1881 int bytes_to_copy
= (len
> remaining
) ? remaining
: len
;
1883 memcpy_fromfs(scratch
+ (p
- top
), tmp
, bytes_to_copy
);
1885 tmp
+= bytes_to_copy
;
1886 remaining
-= bytes_to_copy
;
1888 len
-= bytes_to_copy
;
1890 if (remaining
== 0) {
1891 memcpy_to_target(top
, scratch
, p
- top
);
1893 remaining
= TARGET_PAGE_SIZE
;
1898 memcpy_to_target(top
, scratch
, p
- top
);
1905 /* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1906 * argument/environment space. Newer kernels (>2.6.33) allow more,
1907 * dependent on stack size, but guarantee at least 32 pages for
1908 * backwards compatibility.
1910 #define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1912 static abi_ulong
setup_arg_pages(struct linux_binprm
*bprm
,
1913 struct image_info
*info
)
1915 abi_ulong size
, error
, guard
;
1917 size
= guest_stack_size
;
1918 if (size
< STACK_LOWER_LIMIT
) {
1919 size
= STACK_LOWER_LIMIT
;
1921 guard
= TARGET_PAGE_SIZE
;
1922 if (guard
< qemu_real_host_page_size()) {
1923 guard
= qemu_real_host_page_size();
1926 error
= target_mmap(0, size
+ guard
, PROT_READ
| PROT_WRITE
,
1927 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
1929 perror("mmap stack");
1933 /* We reserve one extra page at the top of the stack as guard. */
1934 if (STACK_GROWS_DOWN
) {
1935 target_mprotect(error
, guard
, PROT_NONE
);
1936 info
->stack_limit
= error
+ guard
;
1937 return info
->stack_limit
+ size
- sizeof(void *);
1939 target_mprotect(error
+ size
, guard
, PROT_NONE
);
1940 info
->stack_limit
= error
+ size
;
1945 /* Map and zero the bss. We need to explicitly zero any fractional pages
1946 after the data section (i.e. bss). */
1947 static void zero_bss(abi_ulong elf_bss
, abi_ulong last_bss
, int prot
)
1949 uintptr_t host_start
, host_map_start
, host_end
;
1951 last_bss
= TARGET_PAGE_ALIGN(last_bss
);
1953 /* ??? There is confusion between qemu_real_host_page_size and
1954 qemu_host_page_size here and elsewhere in target_mmap, which
1955 may lead to the end of the data section mapping from the file
1956 not being mapped. At least there was an explicit test and
1957 comment for that here, suggesting that "the file size must
1958 be known". The comment probably pre-dates the introduction
1959 of the fstat system call in target_mmap which does in fact
1960 find out the size. What isn't clear is if the workaround
1961 here is still actually needed. For now, continue with it,
1962 but merge it with the "normal" mmap that would allocate the bss. */
1964 host_start
= (uintptr_t) g2h_untagged(elf_bss
);
1965 host_end
= (uintptr_t) g2h_untagged(last_bss
);
1966 host_map_start
= REAL_HOST_PAGE_ALIGN(host_start
);
1968 if (host_map_start
< host_end
) {
1969 void *p
= mmap((void *)host_map_start
, host_end
- host_map_start
,
1970 prot
, MAP_FIXED
| MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
1971 if (p
== MAP_FAILED
) {
1972 perror("cannot mmap brk");
1977 /* Ensure that the bss page(s) are valid */
1978 if ((page_get_flags(last_bss
-1) & prot
) != prot
) {
1979 page_set_flags(elf_bss
& TARGET_PAGE_MASK
, last_bss
, prot
| PAGE_VALID
);
1982 if (host_start
< host_map_start
) {
1983 memset((void *)host_start
, 0, host_map_start
- host_start
);
1988 static int elf_is_fdpic(struct elfhdr
*exec
)
1990 return exec
->e_ident
[EI_OSABI
] == ELFOSABI_ARM_FDPIC
;
1993 /* Default implementation, always false. */
1994 static int elf_is_fdpic(struct elfhdr
*exec
)
2000 static abi_ulong
loader_build_fdpic_loadmap(struct image_info
*info
, abi_ulong sp
)
2003 struct elf32_fdpic_loadseg
*loadsegs
= info
->loadsegs
;
2005 /* elf32_fdpic_loadseg */
2009 put_user_u32(loadsegs
[n
].addr
, sp
+0);
2010 put_user_u32(loadsegs
[n
].p_vaddr
, sp
+4);
2011 put_user_u32(loadsegs
[n
].p_memsz
, sp
+8);
2014 /* elf32_fdpic_loadmap */
2016 put_user_u16(0, sp
+0); /* version */
2017 put_user_u16(info
->nsegs
, sp
+2); /* nsegs */
2019 info
->personality
= PER_LINUX_FDPIC
;
2020 info
->loadmap_addr
= sp
;
2025 static abi_ulong
create_elf_tables(abi_ulong p
, int argc
, int envc
,
2026 struct elfhdr
*exec
,
2027 struct image_info
*info
,
2028 struct image_info
*interp_info
)
2031 abi_ulong u_argc
, u_argv
, u_envp
, u_auxv
;
2034 abi_ulong u_rand_bytes
;
2035 uint8_t k_rand_bytes
[16];
2036 abi_ulong u_platform
;
2037 const char *k_platform
;
2038 const int n
= sizeof(elf_addr_t
);
2042 /* Needs to be before we load the env/argc/... */
2043 if (elf_is_fdpic(exec
)) {
2044 /* Need 4 byte alignment for these structs */
2046 sp
= loader_build_fdpic_loadmap(info
, sp
);
2047 info
->other_info
= interp_info
;
2049 interp_info
->other_info
= info
;
2050 sp
= loader_build_fdpic_loadmap(interp_info
, sp
);
2051 info
->interpreter_loadmap_addr
= interp_info
->loadmap_addr
;
2052 info
->interpreter_pt_dynamic_addr
= interp_info
->pt_dynamic_addr
;
2054 info
->interpreter_loadmap_addr
= 0;
2055 info
->interpreter_pt_dynamic_addr
= 0;
2060 k_platform
= ELF_PLATFORM
;
2062 size_t len
= strlen(k_platform
) + 1;
2063 if (STACK_GROWS_DOWN
) {
2064 sp
-= (len
+ n
- 1) & ~(n
- 1);
2066 /* FIXME - check return value of memcpy_to_target() for failure */
2067 memcpy_to_target(sp
, k_platform
, len
);
2069 memcpy_to_target(sp
, k_platform
, len
);
2075 /* Provide 16 byte alignment for the PRNG, and basic alignment for
2076 * the argv and envp pointers.
2078 if (STACK_GROWS_DOWN
) {
2079 sp
= QEMU_ALIGN_DOWN(sp
, 16);
2081 sp
= QEMU_ALIGN_UP(sp
, 16);
2085 * Generate 16 random bytes for userspace PRNG seeding.
2087 qemu_guest_getrandom_nofail(k_rand_bytes
, sizeof(k_rand_bytes
));
2088 if (STACK_GROWS_DOWN
) {
2091 /* FIXME - check return value of memcpy_to_target() for failure */
2092 memcpy_to_target(sp
, k_rand_bytes
, 16);
2094 memcpy_to_target(sp
, k_rand_bytes
, 16);
2099 size
= (DLINFO_ITEMS
+ 1) * 2;
2102 #ifdef DLINFO_ARCH_ITEMS
2103 size
+= DLINFO_ARCH_ITEMS
* 2;
2108 info
->auxv_len
= size
* n
;
2110 size
+= envc
+ argc
+ 2;
2111 size
+= 1; /* argc itself */
2114 /* Allocate space and finalize stack alignment for entry now. */
2115 if (STACK_GROWS_DOWN
) {
2116 u_argc
= QEMU_ALIGN_DOWN(sp
- size
, STACK_ALIGNMENT
);
2120 sp
= QEMU_ALIGN_UP(sp
+ size
, STACK_ALIGNMENT
);
2123 u_argv
= u_argc
+ n
;
2124 u_envp
= u_argv
+ (argc
+ 1) * n
;
2125 u_auxv
= u_envp
+ (envc
+ 1) * n
;
2126 info
->saved_auxv
= u_auxv
;
2129 info
->argv
= u_argv
;
2130 info
->envp
= u_envp
;
2132 /* This is correct because Linux defines
2133 * elf_addr_t as Elf32_Off / Elf64_Off
2135 #define NEW_AUX_ENT(id, val) do { \
2136 put_user_ual(id, u_auxv); u_auxv += n; \
2137 put_user_ual(val, u_auxv); u_auxv += n; \
2142 * ARCH_DLINFO must come first so platform specific code can enforce
2143 * special alignment requirements on the AUXV if necessary (eg. PPC).
2147 /* There must be exactly DLINFO_ITEMS entries here, or the assert
2148 * on info->auxv_len will trigger.
2150 NEW_AUX_ENT(AT_PHDR
, (abi_ulong
)(info
->load_addr
+ exec
->e_phoff
));
2151 NEW_AUX_ENT(AT_PHENT
, (abi_ulong
)(sizeof (struct elf_phdr
)));
2152 NEW_AUX_ENT(AT_PHNUM
, (abi_ulong
)(exec
->e_phnum
));
2153 if ((info
->alignment
& ~qemu_host_page_mask
) != 0) {
2154 /* Target doesn't support host page size alignment */
2155 NEW_AUX_ENT(AT_PAGESZ
, (abi_ulong
)(TARGET_PAGE_SIZE
));
2157 NEW_AUX_ENT(AT_PAGESZ
, (abi_ulong
)(MAX(TARGET_PAGE_SIZE
,
2158 qemu_host_page_size
)));
2160 NEW_AUX_ENT(AT_BASE
, (abi_ulong
)(interp_info
? interp_info
->load_addr
: 0));
2161 NEW_AUX_ENT(AT_FLAGS
, (abi_ulong
)0);
2162 NEW_AUX_ENT(AT_ENTRY
, info
->entry
);
2163 NEW_AUX_ENT(AT_UID
, (abi_ulong
) getuid());
2164 NEW_AUX_ENT(AT_EUID
, (abi_ulong
) geteuid());
2165 NEW_AUX_ENT(AT_GID
, (abi_ulong
) getgid());
2166 NEW_AUX_ENT(AT_EGID
, (abi_ulong
) getegid());
2167 NEW_AUX_ENT(AT_HWCAP
, (abi_ulong
) ELF_HWCAP
);
2168 NEW_AUX_ENT(AT_CLKTCK
, (abi_ulong
) sysconf(_SC_CLK_TCK
));
2169 NEW_AUX_ENT(AT_RANDOM
, (abi_ulong
) u_rand_bytes
);
2170 NEW_AUX_ENT(AT_SECURE
, (abi_ulong
) qemu_getauxval(AT_SECURE
));
2171 NEW_AUX_ENT(AT_EXECFN
, info
->file_string
);
2174 NEW_AUX_ENT(AT_HWCAP2
, (abi_ulong
) ELF_HWCAP2
);
2178 NEW_AUX_ENT(AT_PLATFORM
, u_platform
);
2180 NEW_AUX_ENT (AT_NULL
, 0);
2183 /* Check that our initial calculation of the auxv length matches how much
2184 * we actually put into it.
2186 assert(info
->auxv_len
== u_auxv
- info
->saved_auxv
);
2188 put_user_ual(argc
, u_argc
);
2190 p
= info
->arg_strings
;
2191 for (i
= 0; i
< argc
; ++i
) {
2192 put_user_ual(p
, u_argv
);
2194 p
+= target_strlen(p
) + 1;
2196 put_user_ual(0, u_argv
);
2198 p
= info
->env_strings
;
2199 for (i
= 0; i
< envc
; ++i
) {
2200 put_user_ual(p
, u_envp
);
2202 p
+= target_strlen(p
) + 1;
2204 put_user_ual(0, u_envp
);
2209 #if defined(HI_COMMPAGE)
2210 #define LO_COMMPAGE 0
2211 #elif defined(LO_COMMPAGE)
2212 #define HI_COMMPAGE 0
2214 #define HI_COMMPAGE 0
2215 #define LO_COMMPAGE 0
2216 #define init_guest_commpage() true
2219 static void pgb_fail_in_use(const char *image_name
)
2221 error_report("%s: requires virtual address space that is in use "
2222 "(omit the -B option or choose a different value)",
2227 static void pgb_have_guest_base(const char *image_name
, abi_ulong guest_loaddr
,
2228 abi_ulong guest_hiaddr
, long align
)
2230 const int flags
= MAP_ANONYMOUS
| MAP_PRIVATE
| MAP_NORESERVE
;
2233 if (!QEMU_IS_ALIGNED(guest_base
, align
)) {
2234 fprintf(stderr
, "Requested guest base %p does not satisfy "
2235 "host minimum alignment (0x%lx)\n",
2236 (void *)guest_base
, align
);
2240 /* Sanity check the guest binary. */
2242 if (guest_hiaddr
> reserved_va
) {
2243 error_report("%s: requires more than reserved virtual "
2244 "address space (0x%" PRIx64
" > 0x%lx)",
2245 image_name
, (uint64_t)guest_hiaddr
, reserved_va
);
2249 #if HOST_LONG_BITS < TARGET_ABI_BITS
2250 if ((guest_hiaddr
- guest_base
) > ~(uintptr_t)0) {
2251 error_report("%s: requires more virtual address space "
2252 "than the host can provide (0x%" PRIx64
")",
2253 image_name
, (uint64_t)guest_hiaddr
- guest_base
);
2260 * Expand the allocation to the entire reserved_va.
2261 * Exclude the mmap_min_addr hole.
2264 guest_loaddr
= (guest_base
>= mmap_min_addr
? 0
2265 : mmap_min_addr
- guest_base
);
2266 guest_hiaddr
= reserved_va
;
2269 /* Reserve the address space for the binary, or reserved_va. */
2270 test
= g2h_untagged(guest_loaddr
);
2271 addr
= mmap(test
, guest_hiaddr
- guest_loaddr
, PROT_NONE
, flags
, -1, 0);
2273 pgb_fail_in_use(image_name
);
2275 qemu_log_mask(CPU_LOG_PAGE
,
2276 "%s: base @ %p for " TARGET_ABI_FMT_ld
" bytes\n",
2277 __func__
, addr
, guest_hiaddr
- guest_loaddr
);
2281 * pgd_find_hole_fallback: potential mmap address
2282 * @guest_size: size of available space
2283 * @brk: location of break
2284 * @align: memory alignment
2286 * This is a fallback method for finding a hole in the host address
2287 * space if we don't have the benefit of being able to access
2288 * /proc/self/map. It can potentially take a very long time as we can
2289 * only dumbly iterate up the host address space seeing if the
2290 * allocation would work.
2292 static uintptr_t pgd_find_hole_fallback(uintptr_t guest_size
, uintptr_t brk
,
2293 long align
, uintptr_t offset
)
2297 /* Start (aligned) at the bottom and work our way up */
2298 base
= ROUND_UP(mmap_min_addr
, align
);
2301 uintptr_t align_start
, end
;
2302 align_start
= ROUND_UP(base
, align
);
2303 end
= align_start
+ guest_size
+ offset
;
2305 /* if brk is anywhere in the range give ourselves some room to grow. */
2306 if (align_start
<= brk
&& brk
< end
) {
2307 base
= brk
+ (16 * MiB
);
2309 } else if (align_start
+ guest_size
< align_start
) {
2310 /* we have run out of space */
2313 int flags
= MAP_ANONYMOUS
| MAP_PRIVATE
| MAP_NORESERVE
|
2314 MAP_FIXED_NOREPLACE
;
2315 void * mmap_start
= mmap((void *) align_start
, guest_size
,
2316 PROT_NONE
, flags
, -1, 0);
2317 if (mmap_start
!= MAP_FAILED
) {
2318 munmap(mmap_start
, guest_size
);
2319 if (mmap_start
== (void *) align_start
) {
2320 qemu_log_mask(CPU_LOG_PAGE
,
2321 "%s: base @ %p for %" PRIdPTR
" bytes\n",
2322 __func__
, mmap_start
+ offset
, guest_size
);
2323 return (uintptr_t) mmap_start
+ offset
;
2326 base
+= qemu_host_page_size
;
2331 /* Return value for guest_base, or -1 if no hole found. */
2332 static uintptr_t pgb_find_hole(uintptr_t guest_loaddr
, uintptr_t guest_size
,
2333 long align
, uintptr_t offset
)
2335 GSList
*maps
, *iter
;
2336 uintptr_t this_start
, this_end
, next_start
, brk
;
2339 assert(QEMU_IS_ALIGNED(guest_loaddr
, align
));
2341 maps
= read_self_maps();
2343 /* Read brk after we've read the maps, which will malloc. */
2344 brk
= (uintptr_t)sbrk(0);
2347 return pgd_find_hole_fallback(guest_size
, brk
, align
, offset
);
2350 /* The first hole is before the first map entry. */
2351 this_start
= mmap_min_addr
;
2353 for (iter
= maps
; iter
;
2354 this_start
= next_start
, iter
= g_slist_next(iter
)) {
2355 uintptr_t align_start
, hole_size
;
2357 this_end
= ((MapInfo
*)iter
->data
)->start
;
2358 next_start
= ((MapInfo
*)iter
->data
)->end
;
2359 align_start
= ROUND_UP(this_start
+ offset
, align
);
2361 /* Skip holes that are too small. */
2362 if (align_start
>= this_end
) {
2365 hole_size
= this_end
- align_start
;
2366 if (hole_size
< guest_size
) {
2370 /* If this hole contains brk, give ourselves some room to grow. */
2371 if (this_start
<= brk
&& brk
< this_end
) {
2372 hole_size
-= guest_size
;
2373 if (sizeof(uintptr_t) == 8 && hole_size
>= 1 * GiB
) {
2374 align_start
+= 1 * GiB
;
2375 } else if (hole_size
>= 16 * MiB
) {
2376 align_start
+= 16 * MiB
;
2378 align_start
= (this_end
- guest_size
) & -align
;
2379 if (align_start
< this_start
) {
2385 /* Record the lowest successful match. */
2389 /* If this hole contains the identity map, select it. */
2390 if (align_start
<= guest_loaddr
&&
2391 guest_loaddr
+ guest_size
<= this_end
) {
2394 /* If this hole ends above the identity map, stop looking. */
2395 if (this_end
>= guest_loaddr
) {
2399 free_self_maps(maps
);
2402 qemu_log_mask(CPU_LOG_PAGE
, "%s: base @ %" PRIxPTR
2403 " for %" PRIuPTR
" bytes\n",
2404 __func__
, ret
, guest_size
);
2410 static void pgb_static(const char *image_name
, abi_ulong orig_loaddr
,
2411 abi_ulong orig_hiaddr
, long align
)
2413 uintptr_t loaddr
= orig_loaddr
;
2414 uintptr_t hiaddr
= orig_hiaddr
;
2415 uintptr_t offset
= 0;
2418 if (hiaddr
!= orig_hiaddr
) {
2419 error_report("%s: requires virtual address space that the "
2420 "host cannot provide (0x%" PRIx64
")",
2421 image_name
, (uint64_t)orig_hiaddr
);
2428 * Extend the allocation to include the commpage.
2429 * For a 64-bit host, this is just 4GiB; for a 32-bit host we
2430 * need to ensure there is space bellow the guest_base so we
2431 * can map the commpage in the place needed when the address
2432 * arithmetic wraps around.
2434 if (sizeof(uintptr_t) == 8 || loaddr
>= 0x80000000u
) {
2435 hiaddr
= (uintptr_t) 4 << 30;
2437 offset
= -(HI_COMMPAGE
& -align
);
2439 } else if (LO_COMMPAGE
!= 0) {
2440 loaddr
= MIN(loaddr
, LO_COMMPAGE
& -align
);
2443 addr
= pgb_find_hole(loaddr
, hiaddr
- loaddr
, align
, offset
);
2446 * If HI_COMMPAGE, there *might* be a non-consecutive allocation
2447 * that can satisfy both. But as the normal arm32 link base address
2448 * is ~32k, and we extend down to include the commpage, making the
2449 * overhead only ~96k, this is unlikely.
2451 error_report("%s: Unable to allocate %#zx bytes of "
2452 "virtual address space", image_name
,
2453 (size_t)(hiaddr
- loaddr
));
2459 qemu_log_mask(CPU_LOG_PAGE
, "%s: base @ %"PRIxPTR
" for %" PRIuPTR
" bytes\n",
2460 __func__
, addr
, hiaddr
- loaddr
);
2463 static void pgb_dynamic(const char *image_name
, long align
)
2466 * The executable is dynamic and does not require a fixed address.
2467 * All we need is a commpage that satisfies align.
2468 * If we do not need a commpage, leave guest_base == 0.
2471 uintptr_t addr
, commpage
;
2473 /* 64-bit hosts should have used reserved_va. */
2474 assert(sizeof(uintptr_t) == 4);
2477 * By putting the commpage at the first hole, that puts guest_base
2478 * just above that, and maximises the positive guest addresses.
2480 commpage
= HI_COMMPAGE
& -align
;
2481 addr
= pgb_find_hole(commpage
, -commpage
, align
, 0);
2487 static void pgb_reserved_va(const char *image_name
, abi_ulong guest_loaddr
,
2488 abi_ulong guest_hiaddr
, long align
)
2490 int flags
= MAP_ANONYMOUS
| MAP_PRIVATE
| MAP_NORESERVE
;
2493 if (guest_hiaddr
> reserved_va
) {
2494 error_report("%s: requires more than reserved virtual "
2495 "address space (0x%" PRIx64
" > 0x%lx)",
2496 image_name
, (uint64_t)guest_hiaddr
, reserved_va
);
2500 /* Widen the "image" to the entire reserved address space. */
2501 pgb_static(image_name
, 0, reserved_va
, align
);
2503 /* osdep.h defines this as 0 if it's missing */
2504 flags
|= MAP_FIXED_NOREPLACE
;
2506 /* Reserve the memory on the host. */
2507 assert(guest_base
!= 0);
2508 test
= g2h_untagged(0);
2509 addr
= mmap(test
, reserved_va
, PROT_NONE
, flags
, -1, 0);
2510 if (addr
== MAP_FAILED
|| addr
!= test
) {
2511 error_report("Unable to reserve 0x%lx bytes of virtual address "
2512 "space at %p (%s) for use as guest address space (check your "
2513 "virtual memory ulimit setting, min_mmap_addr or reserve less "
2514 "using -R option)", reserved_va
, test
, strerror(errno
));
2518 qemu_log_mask(CPU_LOG_PAGE
, "%s: base @ %p for %lu bytes\n",
2519 __func__
, addr
, reserved_va
);
2522 void probe_guest_base(const char *image_name
, abi_ulong guest_loaddr
,
2523 abi_ulong guest_hiaddr
)
2525 /* In order to use host shmat, we must be able to honor SHMLBA. */
2526 uintptr_t align
= MAX(SHMLBA
, qemu_host_page_size
);
2528 if (have_guest_base
) {
2529 pgb_have_guest_base(image_name
, guest_loaddr
, guest_hiaddr
, align
);
2530 } else if (reserved_va
) {
2531 pgb_reserved_va(image_name
, guest_loaddr
, guest_hiaddr
, align
);
2532 } else if (guest_loaddr
) {
2533 pgb_static(image_name
, guest_loaddr
, guest_hiaddr
, align
);
2535 pgb_dynamic(image_name
, align
);
2538 /* Reserve and initialize the commpage. */
2539 if (!init_guest_commpage()) {
2541 * With have_guest_base, the user has selected the address and
2542 * we are trying to work with that. Otherwise, we have selected
2543 * free space and init_guest_commpage must succeeded.
2545 assert(have_guest_base
);
2546 pgb_fail_in_use(image_name
);
2549 assert(QEMU_IS_ALIGNED(guest_base
, align
));
2550 qemu_log_mask(CPU_LOG_PAGE
, "Locating guest address space "
2551 "@ 0x%" PRIx64
"\n", (uint64_t)guest_base
);
2555 /* The string "GNU\0" as a magic number. */
2556 GNU0_MAGIC
= const_le32('G' | 'N' << 8 | 'U' << 16),
2557 NOTE_DATA_SZ
= 1 * KiB
,
2559 ELF_GNU_PROPERTY_ALIGN
= ELF_CLASS
== ELFCLASS32
? 4 : 8,
2563 * Process a single gnu_property entry.
2564 * Return false for error.
2566 static bool parse_elf_property(const uint32_t *data
, int *off
, int datasz
,
2567 struct image_info
*info
, bool have_prev_type
,
2568 uint32_t *prev_type
, Error
**errp
)
2570 uint32_t pr_type
, pr_datasz
, step
;
2572 if (*off
> datasz
|| !QEMU_IS_ALIGNED(*off
, ELF_GNU_PROPERTY_ALIGN
)) {
2576 data
+= *off
/ sizeof(uint32_t);
2578 if (datasz
< 2 * sizeof(uint32_t)) {
2582 pr_datasz
= data
[1];
2584 datasz
-= 2 * sizeof(uint32_t);
2585 step
= ROUND_UP(pr_datasz
, ELF_GNU_PROPERTY_ALIGN
);
2586 if (step
> datasz
) {
2590 /* Properties are supposed to be unique and sorted on pr_type. */
2591 if (have_prev_type
&& pr_type
<= *prev_type
) {
2592 if (pr_type
== *prev_type
) {
2593 error_setg(errp
, "Duplicate property in PT_GNU_PROPERTY");
2595 error_setg(errp
, "Unsorted property in PT_GNU_PROPERTY");
2599 *prev_type
= pr_type
;
2601 if (!arch_parse_elf_property(pr_type
, pr_datasz
, data
, info
, errp
)) {
2605 *off
+= 2 * sizeof(uint32_t) + step
;
2609 error_setg(errp
, "Ill-formed property in PT_GNU_PROPERTY");
2613 /* Process NT_GNU_PROPERTY_TYPE_0. */
2614 static bool parse_elf_properties(int image_fd
,
2615 struct image_info
*info
,
2616 const struct elf_phdr
*phdr
,
2617 char bprm_buf
[BPRM_BUF_SIZE
],
2621 struct elf_note nhdr
;
2622 uint32_t data
[NOTE_DATA_SZ
/ sizeof(uint32_t)];
2626 bool have_prev_type
;
2629 /* Unless the arch requires properties, ignore them. */
2630 if (!ARCH_USE_GNU_PROPERTY
) {
2634 /* If the properties are crazy large, that's too bad. */
2636 if (n
> sizeof(note
)) {
2637 error_setg(errp
, "PT_GNU_PROPERTY too large");
2640 if (n
< sizeof(note
.nhdr
)) {
2641 error_setg(errp
, "PT_GNU_PROPERTY too small");
2645 if (phdr
->p_offset
+ n
<= BPRM_BUF_SIZE
) {
2646 memcpy(¬e
, bprm_buf
+ phdr
->p_offset
, n
);
2648 ssize_t len
= pread(image_fd
, ¬e
, n
, phdr
->p_offset
);
2650 error_setg_errno(errp
, errno
, "Error reading file header");
2656 * The contents of a valid PT_GNU_PROPERTY is a sequence
2657 * of uint32_t -- swap them all now.
2660 for (int i
= 0; i
< n
/ 4; i
++) {
2661 bswap32s(note
.data
+ i
);
2666 * Note that nhdr is 3 words, and that the "name" described by namesz
2667 * immediately follows nhdr and is thus at the 4th word. Further, all
2668 * of the inputs to the kernel's round_up are multiples of 4.
2670 if (note
.nhdr
.n_type
!= NT_GNU_PROPERTY_TYPE_0
||
2671 note
.nhdr
.n_namesz
!= NOTE_NAME_SZ
||
2672 note
.data
[3] != GNU0_MAGIC
) {
2673 error_setg(errp
, "Invalid note in PT_GNU_PROPERTY");
2676 off
= sizeof(note
.nhdr
) + NOTE_NAME_SZ
;
2678 datasz
= note
.nhdr
.n_descsz
+ off
;
2680 error_setg(errp
, "Invalid note size in PT_GNU_PROPERTY");
2684 have_prev_type
= false;
2687 if (off
== datasz
) {
2688 return true; /* end, exit ok */
2690 if (!parse_elf_property(note
.data
, &off
, datasz
, info
,
2691 have_prev_type
, &prev_type
, errp
)) {
2694 have_prev_type
= true;
2698 /* Load an ELF image into the address space.
2700 IMAGE_NAME is the filename of the image, to use in error messages.
2701 IMAGE_FD is the open file descriptor for the image.
2703 BPRM_BUF is a copy of the beginning of the file; this of course
2704 contains the elf file header at offset 0. It is assumed that this
2705 buffer is sufficiently aligned to present no problems to the host
2706 in accessing data at aligned offsets within the buffer.
2708 On return: INFO values will be filled in, as necessary or available. */
2710 static void load_elf_image(const char *image_name
, int image_fd
,
2711 struct image_info
*info
, char **pinterp_name
,
2712 char bprm_buf
[BPRM_BUF_SIZE
])
2714 struct elfhdr
*ehdr
= (struct elfhdr
*)bprm_buf
;
2715 struct elf_phdr
*phdr
;
2716 abi_ulong load_addr
, load_bias
, loaddr
, hiaddr
, error
;
2717 int i
, retval
, prot_exec
;
2720 /* First of all, some simple consistency checks */
2721 if (!elf_check_ident(ehdr
)) {
2722 error_setg(&err
, "Invalid ELF image for this architecture");
2726 if (!elf_check_ehdr(ehdr
)) {
2727 error_setg(&err
, "Invalid ELF image for this architecture");
2731 i
= ehdr
->e_phnum
* sizeof(struct elf_phdr
);
2732 if (ehdr
->e_phoff
+ i
<= BPRM_BUF_SIZE
) {
2733 phdr
= (struct elf_phdr
*)(bprm_buf
+ ehdr
->e_phoff
);
2735 phdr
= (struct elf_phdr
*) alloca(i
);
2736 retval
= pread(image_fd
, phdr
, i
, ehdr
->e_phoff
);
2741 bswap_phdr(phdr
, ehdr
->e_phnum
);
2744 info
->pt_dynamic_addr
= 0;
2749 * Find the maximum size of the image and allocate an appropriate
2750 * amount of memory to handle that. Locate the interpreter, if any.
2752 loaddr
= -1, hiaddr
= 0;
2753 info
->alignment
= 0;
2754 for (i
= 0; i
< ehdr
->e_phnum
; ++i
) {
2755 struct elf_phdr
*eppnt
= phdr
+ i
;
2756 if (eppnt
->p_type
== PT_LOAD
) {
2757 abi_ulong a
= eppnt
->p_vaddr
- eppnt
->p_offset
;
2761 a
= eppnt
->p_vaddr
+ eppnt
->p_memsz
;
2766 info
->alignment
|= eppnt
->p_align
;
2767 } else if (eppnt
->p_type
== PT_INTERP
&& pinterp_name
) {
2768 g_autofree
char *interp_name
= NULL
;
2770 if (*pinterp_name
) {
2771 error_setg(&err
, "Multiple PT_INTERP entries");
2775 interp_name
= g_malloc(eppnt
->p_filesz
);
2777 if (eppnt
->p_offset
+ eppnt
->p_filesz
<= BPRM_BUF_SIZE
) {
2778 memcpy(interp_name
, bprm_buf
+ eppnt
->p_offset
,
2781 retval
= pread(image_fd
, interp_name
, eppnt
->p_filesz
,
2783 if (retval
!= eppnt
->p_filesz
) {
2787 if (interp_name
[eppnt
->p_filesz
- 1] != 0) {
2788 error_setg(&err
, "Invalid PT_INTERP entry");
2791 *pinterp_name
= g_steal_pointer(&interp_name
);
2792 } else if (eppnt
->p_type
== PT_GNU_PROPERTY
) {
2793 if (!parse_elf_properties(image_fd
, info
, eppnt
, bprm_buf
, &err
)) {
2799 if (pinterp_name
!= NULL
) {
2801 * This is the main executable.
2803 * Reserve extra space for brk.
2804 * We hold on to this space while placing the interpreter
2805 * and the stack, lest they be placed immediately after
2806 * the data segment and block allocation from the brk.
2808 * 16MB is chosen as "large enough" without being so large as
2809 * to allow the result to not fit with a 32-bit guest on a
2810 * 32-bit host. However some 64 bit guests (e.g. s390x)
2811 * attempt to place their heap further ahead and currently
2812 * nothing stops them smashing into QEMUs address space.
2814 #if TARGET_LONG_BITS == 64
2815 info
->reserve_brk
= 32 * MiB
;
2817 info
->reserve_brk
= 16 * MiB
;
2819 hiaddr
+= info
->reserve_brk
;
2821 if (ehdr
->e_type
== ET_EXEC
) {
2823 * Make sure that the low address does not conflict with
2824 * MMAP_MIN_ADDR or the QEMU application itself.
2826 probe_guest_base(image_name
, loaddr
, hiaddr
);
2829 * The binary is dynamic, but we still need to
2830 * select guest_base. In this case we pass a size.
2832 probe_guest_base(image_name
, 0, hiaddr
- loaddr
);
2837 * Reserve address space for all of this.
2839 * In the case of ET_EXEC, we supply MAP_FIXED so that we get
2840 * exactly the address range that is required.
2842 * Otherwise this is ET_DYN, and we are searching for a location
2843 * that can hold the memory space required. If the image is
2844 * pre-linked, LOADDR will be non-zero, and the kernel should
2845 * honor that address if it happens to be free.
2847 * In both cases, we will overwrite pages in this range with mappings
2848 * from the executable.
2850 load_addr
= target_mmap(loaddr
, hiaddr
- loaddr
, PROT_NONE
,
2851 MAP_PRIVATE
| MAP_ANON
| MAP_NORESERVE
|
2852 (ehdr
->e_type
== ET_EXEC
? MAP_FIXED
: 0),
2854 if (load_addr
== -1) {
2857 load_bias
= load_addr
- loaddr
;
2859 if (elf_is_fdpic(ehdr
)) {
2860 struct elf32_fdpic_loadseg
*loadsegs
= info
->loadsegs
=
2861 g_malloc(sizeof(*loadsegs
) * info
->nsegs
);
2863 for (i
= 0; i
< ehdr
->e_phnum
; ++i
) {
2864 switch (phdr
[i
].p_type
) {
2866 info
->pt_dynamic_addr
= phdr
[i
].p_vaddr
+ load_bias
;
2869 loadsegs
->addr
= phdr
[i
].p_vaddr
+ load_bias
;
2870 loadsegs
->p_vaddr
= phdr
[i
].p_vaddr
;
2871 loadsegs
->p_memsz
= phdr
[i
].p_memsz
;
2878 info
->load_bias
= load_bias
;
2879 info
->code_offset
= load_bias
;
2880 info
->data_offset
= load_bias
;
2881 info
->load_addr
= load_addr
;
2882 info
->entry
= ehdr
->e_entry
+ load_bias
;
2883 info
->start_code
= -1;
2885 info
->start_data
= -1;
2888 info
->elf_flags
= ehdr
->e_flags
;
2890 prot_exec
= PROT_EXEC
;
2891 #ifdef TARGET_AARCH64
2893 * If the BTI feature is present, this indicates that the executable
2894 * pages of the startup binary should be mapped with PROT_BTI, so that
2895 * branch targets are enforced.
2897 * The startup binary is either the interpreter or the static executable.
2898 * The interpreter is responsible for all pages of a dynamic executable.
2900 * Elf notes are backward compatible to older cpus.
2901 * Do not enable BTI unless it is supported.
2903 if ((info
->note_flags
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
)
2904 && (pinterp_name
== NULL
|| *pinterp_name
== 0)
2905 && cpu_isar_feature(aa64_bti
, ARM_CPU(thread_cpu
))) {
2906 prot_exec
|= TARGET_PROT_BTI
;
2910 for (i
= 0; i
< ehdr
->e_phnum
; i
++) {
2911 struct elf_phdr
*eppnt
= phdr
+ i
;
2912 if (eppnt
->p_type
== PT_LOAD
) {
2913 abi_ulong vaddr
, vaddr_po
, vaddr_ps
, vaddr_ef
, vaddr_em
, vaddr_len
;
2916 if (eppnt
->p_flags
& PF_R
) {
2917 elf_prot
|= PROT_READ
;
2919 if (eppnt
->p_flags
& PF_W
) {
2920 elf_prot
|= PROT_WRITE
;
2922 if (eppnt
->p_flags
& PF_X
) {
2923 elf_prot
|= prot_exec
;
2926 vaddr
= load_bias
+ eppnt
->p_vaddr
;
2927 vaddr_po
= TARGET_ELF_PAGEOFFSET(vaddr
);
2928 vaddr_ps
= TARGET_ELF_PAGESTART(vaddr
);
2930 vaddr_ef
= vaddr
+ eppnt
->p_filesz
;
2931 vaddr_em
= vaddr
+ eppnt
->p_memsz
;
2934 * Some segments may be completely empty, with a non-zero p_memsz
2935 * but no backing file segment.
2937 if (eppnt
->p_filesz
!= 0) {
2938 vaddr_len
= TARGET_ELF_PAGELENGTH(eppnt
->p_filesz
+ vaddr_po
);
2939 error
= target_mmap(vaddr_ps
, vaddr_len
, elf_prot
,
2940 MAP_PRIVATE
| MAP_FIXED
,
2941 image_fd
, eppnt
->p_offset
- vaddr_po
);
2948 * If the load segment requests extra zeros (e.g. bss), map it.
2950 if (eppnt
->p_filesz
< eppnt
->p_memsz
) {
2951 zero_bss(vaddr_ef
, vaddr_em
, elf_prot
);
2953 } else if (eppnt
->p_memsz
!= 0) {
2954 vaddr_len
= TARGET_ELF_PAGELENGTH(eppnt
->p_memsz
+ vaddr_po
);
2955 error
= target_mmap(vaddr_ps
, vaddr_len
, elf_prot
,
2956 MAP_PRIVATE
| MAP_FIXED
| MAP_ANONYMOUS
,
2964 /* Find the full program boundaries. */
2965 if (elf_prot
& PROT_EXEC
) {
2966 if (vaddr
< info
->start_code
) {
2967 info
->start_code
= vaddr
;
2969 if (vaddr_ef
> info
->end_code
) {
2970 info
->end_code
= vaddr_ef
;
2973 if (elf_prot
& PROT_WRITE
) {
2974 if (vaddr
< info
->start_data
) {
2975 info
->start_data
= vaddr
;
2977 if (vaddr_ef
> info
->end_data
) {
2978 info
->end_data
= vaddr_ef
;
2981 if (vaddr_em
> info
->brk
) {
2982 info
->brk
= vaddr_em
;
2985 } else if (eppnt
->p_type
== PT_MIPS_ABIFLAGS
) {
2986 Mips_elf_abiflags_v0 abiflags
;
2987 if (eppnt
->p_filesz
< sizeof(Mips_elf_abiflags_v0
)) {
2988 error_setg(&err
, "Invalid PT_MIPS_ABIFLAGS entry");
2991 if (eppnt
->p_offset
+ eppnt
->p_filesz
<= BPRM_BUF_SIZE
) {
2992 memcpy(&abiflags
, bprm_buf
+ eppnt
->p_offset
,
2993 sizeof(Mips_elf_abiflags_v0
));
2995 retval
= pread(image_fd
, &abiflags
, sizeof(Mips_elf_abiflags_v0
),
2997 if (retval
!= sizeof(Mips_elf_abiflags_v0
)) {
3001 bswap_mips_abiflags(&abiflags
);
3002 info
->fp_abi
= abiflags
.fp_abi
;
3007 if (info
->end_data
== 0) {
3008 info
->start_data
= info
->end_code
;
3009 info
->end_data
= info
->end_code
;
3012 if (qemu_log_enabled()) {
3013 load_symbols(ehdr
, image_fd
, load_bias
);
3023 error_setg(&err
, "Incomplete read of file header");
3025 error_setg_errno(&err
, errno
, "Error reading file header");
3029 error_setg_errno(&err
, errno
, "Error mapping file");
3032 error_reportf_err(err
, "%s: ", image_name
);
3036 static void load_elf_interp(const char *filename
, struct image_info
*info
,
3037 char bprm_buf
[BPRM_BUF_SIZE
])
3042 fd
= open(path(filename
), O_RDONLY
);
3044 error_setg_file_open(&err
, errno
, filename
);
3045 error_report_err(err
);
3049 retval
= read(fd
, bprm_buf
, BPRM_BUF_SIZE
);
3051 error_setg_errno(&err
, errno
, "Error reading file header");
3052 error_reportf_err(err
, "%s: ", filename
);
3056 if (retval
< BPRM_BUF_SIZE
) {
3057 memset(bprm_buf
+ retval
, 0, BPRM_BUF_SIZE
- retval
);
3060 load_elf_image(filename
, fd
, info
, NULL
, bprm_buf
);
3063 static int symfind(const void *s0
, const void *s1
)
3065 target_ulong addr
= *(target_ulong
*)s0
;
3066 struct elf_sym
*sym
= (struct elf_sym
*)s1
;
3068 if (addr
< sym
->st_value
) {
3070 } else if (addr
>= sym
->st_value
+ sym
->st_size
) {
3076 static const char *lookup_symbolxx(struct syminfo
*s
, target_ulong orig_addr
)
3078 #if ELF_CLASS == ELFCLASS32
3079 struct elf_sym
*syms
= s
->disas_symtab
.elf32
;
3081 struct elf_sym
*syms
= s
->disas_symtab
.elf64
;
3085 struct elf_sym
*sym
;
3087 sym
= bsearch(&orig_addr
, syms
, s
->disas_num_syms
, sizeof(*syms
), symfind
);
3089 return s
->disas_strtab
+ sym
->st_name
;
3095 /* FIXME: This should use elf_ops.h */
3096 static int symcmp(const void *s0
, const void *s1
)
3098 struct elf_sym
*sym0
= (struct elf_sym
*)s0
;
3099 struct elf_sym
*sym1
= (struct elf_sym
*)s1
;
3100 return (sym0
->st_value
< sym1
->st_value
)
3102 : ((sym0
->st_value
> sym1
->st_value
) ? 1 : 0);
3105 /* Best attempt to load symbols from this ELF object. */
3106 static void load_symbols(struct elfhdr
*hdr
, int fd
, abi_ulong load_bias
)
3108 int i
, shnum
, nsyms
, sym_idx
= 0, str_idx
= 0;
3110 struct elf_shdr
*shdr
;
3111 char *strings
= NULL
;
3112 struct syminfo
*s
= NULL
;
3113 struct elf_sym
*new_syms
, *syms
= NULL
;
3115 shnum
= hdr
->e_shnum
;
3116 i
= shnum
* sizeof(struct elf_shdr
);
3117 shdr
= (struct elf_shdr
*)alloca(i
);
3118 if (pread(fd
, shdr
, i
, hdr
->e_shoff
) != i
) {
3122 bswap_shdr(shdr
, shnum
);
3123 for (i
= 0; i
< shnum
; ++i
) {
3124 if (shdr
[i
].sh_type
== SHT_SYMTAB
) {
3126 str_idx
= shdr
[i
].sh_link
;
3131 /* There will be no symbol table if the file was stripped. */
3135 /* Now know where the strtab and symtab are. Snarf them. */
3136 s
= g_try_new(struct syminfo
, 1);
3141 segsz
= shdr
[str_idx
].sh_size
;
3142 s
->disas_strtab
= strings
= g_try_malloc(segsz
);
3144 pread(fd
, strings
, segsz
, shdr
[str_idx
].sh_offset
) != segsz
) {
3148 segsz
= shdr
[sym_idx
].sh_size
;
3149 syms
= g_try_malloc(segsz
);
3150 if (!syms
|| pread(fd
, syms
, segsz
, shdr
[sym_idx
].sh_offset
) != segsz
) {
3154 if (segsz
/ sizeof(struct elf_sym
) > INT_MAX
) {
3155 /* Implausibly large symbol table: give up rather than ploughing
3156 * on with the number of symbols calculation overflowing
3160 nsyms
= segsz
/ sizeof(struct elf_sym
);
3161 for (i
= 0; i
< nsyms
; ) {
3162 bswap_sym(syms
+ i
);
3163 /* Throw away entries which we do not need. */
3164 if (syms
[i
].st_shndx
== SHN_UNDEF
3165 || syms
[i
].st_shndx
>= SHN_LORESERVE
3166 || ELF_ST_TYPE(syms
[i
].st_info
) != STT_FUNC
) {
3168 syms
[i
] = syms
[nsyms
];
3171 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
3172 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
3173 syms
[i
].st_value
&= ~(target_ulong
)1;
3175 syms
[i
].st_value
+= load_bias
;
3180 /* No "useful" symbol. */
3185 /* Attempt to free the storage associated with the local symbols
3186 that we threw away. Whether or not this has any effect on the
3187 memory allocation depends on the malloc implementation and how
3188 many symbols we managed to discard. */
3189 new_syms
= g_try_renew(struct elf_sym
, syms
, nsyms
);
3190 if (new_syms
== NULL
) {
3195 qsort(syms
, nsyms
, sizeof(*syms
), symcmp
);
3197 s
->disas_num_syms
= nsyms
;
3198 #if ELF_CLASS == ELFCLASS32
3199 s
->disas_symtab
.elf32
= syms
;
3201 s
->disas_symtab
.elf64
= syms
;
3203 s
->lookup_symbol
= lookup_symbolxx
;
3215 uint32_t get_elf_eflags(int fd
)
3221 /* Read ELF header */
3222 offset
= lseek(fd
, 0, SEEK_SET
);
3223 if (offset
== (off_t
) -1) {
3226 ret
= read(fd
, &ehdr
, sizeof(ehdr
));
3227 if (ret
< sizeof(ehdr
)) {
3230 offset
= lseek(fd
, offset
, SEEK_SET
);
3231 if (offset
== (off_t
) -1) {
3235 /* Check ELF signature */
3236 if (!elf_check_ident(&ehdr
)) {
3242 if (!elf_check_ehdr(&ehdr
)) {
3246 /* return architecture id */
3247 return ehdr
.e_flags
;
3250 int load_elf_binary(struct linux_binprm
*bprm
, struct image_info
*info
)
3252 struct image_info interp_info
;
3253 struct elfhdr elf_ex
;
3254 char *elf_interpreter
= NULL
;
3257 memset(&interp_info
, 0, sizeof(interp_info
));
3259 interp_info
.fp_abi
= MIPS_ABI_FP_UNKNOWN
;
3262 info
->start_mmap
= (abi_ulong
)ELF_START_MMAP
;
3264 load_elf_image(bprm
->filename
, bprm
->fd
, info
,
3265 &elf_interpreter
, bprm
->buf
);
3267 /* ??? We need a copy of the elf header for passing to create_elf_tables.
3268 If we do nothing, we'll have overwritten this when we re-use bprm->buf
3269 when we load the interpreter. */
3270 elf_ex
= *(struct elfhdr
*)bprm
->buf
;
3272 /* Do this so that we can load the interpreter, if need be. We will
3273 change some of these later */
3274 bprm
->p
= setup_arg_pages(bprm
, info
);
3276 scratch
= g_new0(char, TARGET_PAGE_SIZE
);
3277 if (STACK_GROWS_DOWN
) {
3278 bprm
->p
= copy_elf_strings(1, &bprm
->filename
, scratch
,
3279 bprm
->p
, info
->stack_limit
);
3280 info
->file_string
= bprm
->p
;
3281 bprm
->p
= copy_elf_strings(bprm
->envc
, bprm
->envp
, scratch
,
3282 bprm
->p
, info
->stack_limit
);
3283 info
->env_strings
= bprm
->p
;
3284 bprm
->p
= copy_elf_strings(bprm
->argc
, bprm
->argv
, scratch
,
3285 bprm
->p
, info
->stack_limit
);
3286 info
->arg_strings
= bprm
->p
;
3288 info
->arg_strings
= bprm
->p
;
3289 bprm
->p
= copy_elf_strings(bprm
->argc
, bprm
->argv
, scratch
,
3290 bprm
->p
, info
->stack_limit
);
3291 info
->env_strings
= bprm
->p
;
3292 bprm
->p
= copy_elf_strings(bprm
->envc
, bprm
->envp
, scratch
,
3293 bprm
->p
, info
->stack_limit
);
3294 info
->file_string
= bprm
->p
;
3295 bprm
->p
= copy_elf_strings(1, &bprm
->filename
, scratch
,
3296 bprm
->p
, info
->stack_limit
);
3302 fprintf(stderr
, "%s: %s\n", bprm
->filename
, strerror(E2BIG
));
3306 if (elf_interpreter
) {
3307 load_elf_interp(elf_interpreter
, &interp_info
, bprm
->buf
);
3309 /* If the program interpreter is one of these two, then assume
3310 an iBCS2 image. Otherwise assume a native linux image. */
3312 if (strcmp(elf_interpreter
, "/usr/lib/libc.so.1") == 0
3313 || strcmp(elf_interpreter
, "/usr/lib/ld.so.1") == 0) {
3314 info
->personality
= PER_SVR4
;
3316 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
3317 and some applications "depend" upon this behavior. Since
3318 we do not have the power to recompile these, we emulate
3319 the SVr4 behavior. Sigh. */
3320 target_mmap(0, qemu_host_page_size
, PROT_READ
| PROT_EXEC
,
3321 MAP_FIXED
| MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
3324 info
->interp_fp_abi
= interp_info
.fp_abi
;
3329 * TODO: load a vdso, which would also contain the signal trampolines.
3330 * Otherwise, allocate a private page to hold them.
3332 if (TARGET_ARCH_HAS_SIGTRAMP_PAGE
) {
3333 abi_long tramp_page
= target_mmap(0, TARGET_PAGE_SIZE
,
3334 PROT_READ
| PROT_WRITE
,
3335 MAP_PRIVATE
| MAP_ANON
, -1, 0);
3336 if (tramp_page
== -1) {
3340 setup_sigtramp(tramp_page
);
3341 target_mprotect(tramp_page
, TARGET_PAGE_SIZE
, PROT_READ
| PROT_EXEC
);
3344 bprm
->p
= create_elf_tables(bprm
->p
, bprm
->argc
, bprm
->envc
, &elf_ex
,
3345 info
, (elf_interpreter
? &interp_info
: NULL
));
3346 info
->start_stack
= bprm
->p
;
3348 /* If we have an interpreter, set that as the program's entry point.
3349 Copy the load_bias as well, to help PPC64 interpret the entry
3350 point as a function descriptor. Do this after creating elf tables
3351 so that we copy the original program entry point into the AUXV. */
3352 if (elf_interpreter
) {
3353 info
->load_bias
= interp_info
.load_bias
;
3354 info
->entry
= interp_info
.entry
;
3355 g_free(elf_interpreter
);
3358 #ifdef USE_ELF_CORE_DUMP
3359 bprm
->core_dump
= &elf_core_dump
;
3363 * If we reserved extra space for brk, release it now.
3364 * The implementation of do_brk in syscalls.c expects to be able
3365 * to mmap pages in this space.
3367 if (info
->reserve_brk
) {
3368 abi_ulong start_brk
= HOST_PAGE_ALIGN(info
->brk
);
3369 abi_ulong end_brk
= HOST_PAGE_ALIGN(info
->brk
+ info
->reserve_brk
);
3370 target_munmap(start_brk
, end_brk
- start_brk
);
3376 #ifdef USE_ELF_CORE_DUMP
3378 * Definitions to generate Intel SVR4-like core files.
3379 * These mostly have the same names as the SVR4 types with "target_elf_"
3380 * tacked on the front to prevent clashes with linux definitions,
3381 * and the typedef forms have been avoided. This is mostly like
3382 * the SVR4 structure, but more Linuxy, with things that Linux does
3383 * not support and which gdb doesn't really use excluded.
3385 * Fields we don't dump (their contents is zero) in linux-user qemu
3386 * are marked with XXX.
3388 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
3390 * Porting ELF coredump for target is (quite) simple process. First you
3391 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
3392 * the target resides):
3394 * #define USE_ELF_CORE_DUMP
3396 * Next you define type of register set used for dumping. ELF specification
3397 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
3399 * typedef <target_regtype> target_elf_greg_t;
3400 * #define ELF_NREG <number of registers>
3401 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
3403 * Last step is to implement target specific function that copies registers
3404 * from given cpu into just specified register set. Prototype is:
3406 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
3407 * const CPUArchState *env);
3410 * regs - copy register values into here (allocated and zeroed by caller)
3411 * env - copy registers from here
3413 * Example for ARM target is provided in this file.
3416 /* An ELF note in memory */
3420 size_t namesz_rounded
;
3423 size_t datasz_rounded
;
3428 struct target_elf_siginfo
{
3429 abi_int si_signo
; /* signal number */
3430 abi_int si_code
; /* extra code */
3431 abi_int si_errno
; /* errno */
3434 struct target_elf_prstatus
{
3435 struct target_elf_siginfo pr_info
; /* Info associated with signal */
3436 abi_short pr_cursig
; /* Current signal */
3437 abi_ulong pr_sigpend
; /* XXX */
3438 abi_ulong pr_sighold
; /* XXX */
3439 target_pid_t pr_pid
;
3440 target_pid_t pr_ppid
;
3441 target_pid_t pr_pgrp
;
3442 target_pid_t pr_sid
;
3443 struct target_timeval pr_utime
; /* XXX User time */
3444 struct target_timeval pr_stime
; /* XXX System time */
3445 struct target_timeval pr_cutime
; /* XXX Cumulative user time */
3446 struct target_timeval pr_cstime
; /* XXX Cumulative system time */
3447 target_elf_gregset_t pr_reg
; /* GP registers */
3448 abi_int pr_fpvalid
; /* XXX */
3451 #define ELF_PRARGSZ (80) /* Number of chars for args */
3453 struct target_elf_prpsinfo
{
3454 char pr_state
; /* numeric process state */
3455 char pr_sname
; /* char for pr_state */
3456 char pr_zomb
; /* zombie */
3457 char pr_nice
; /* nice val */
3458 abi_ulong pr_flag
; /* flags */
3459 target_uid_t pr_uid
;
3460 target_gid_t pr_gid
;
3461 target_pid_t pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
3463 char pr_fname
[16] QEMU_NONSTRING
; /* filename of executable */
3464 char pr_psargs
[ELF_PRARGSZ
]; /* initial part of arg list */
3467 /* Here is the structure in which status of each thread is captured. */
3468 struct elf_thread_status
{
3469 QTAILQ_ENTRY(elf_thread_status
) ets_link
;
3470 struct target_elf_prstatus prstatus
; /* NT_PRSTATUS */
3472 elf_fpregset_t fpu
; /* NT_PRFPREG */
3473 struct task_struct
*thread
;
3474 elf_fpxregset_t xfpu
; /* ELF_CORE_XFPREG_TYPE */
3476 struct memelfnote notes
[1];
3480 struct elf_note_info
{
3481 struct memelfnote
*notes
;
3482 struct target_elf_prstatus
*prstatus
; /* NT_PRSTATUS */
3483 struct target_elf_prpsinfo
*psinfo
; /* NT_PRPSINFO */
3485 QTAILQ_HEAD(, elf_thread_status
) thread_list
;
3488 * Current version of ELF coredump doesn't support
3489 * dumping fp regs etc.
3491 elf_fpregset_t
*fpu
;
3492 elf_fpxregset_t
*xfpu
;
3493 int thread_status_size
;
3499 struct vm_area_struct
{
3500 target_ulong vma_start
; /* start vaddr of memory region */
3501 target_ulong vma_end
; /* end vaddr of memory region */
3502 abi_ulong vma_flags
; /* protection etc. flags for the region */
3503 QTAILQ_ENTRY(vm_area_struct
) vma_link
;
3507 QTAILQ_HEAD(, vm_area_struct
) mm_mmap
;
3508 int mm_count
; /* number of mappings */
3511 static struct mm_struct
*vma_init(void);
3512 static void vma_delete(struct mm_struct
*);
3513 static int vma_add_mapping(struct mm_struct
*, target_ulong
,
3514 target_ulong
, abi_ulong
);
3515 static int vma_get_mapping_count(const struct mm_struct
*);
3516 static struct vm_area_struct
*vma_first(const struct mm_struct
*);
3517 static struct vm_area_struct
*vma_next(struct vm_area_struct
*);
3518 static abi_ulong
vma_dump_size(const struct vm_area_struct
*);
3519 static int vma_walker(void *priv
, target_ulong start
, target_ulong end
,
3520 unsigned long flags
);
3522 static void fill_elf_header(struct elfhdr
*, int, uint16_t, uint32_t);
3523 static void fill_note(struct memelfnote
*, const char *, int,
3524 unsigned int, void *);
3525 static void fill_prstatus(struct target_elf_prstatus
*, const TaskState
*, int);
3526 static int fill_psinfo(struct target_elf_prpsinfo
*, const TaskState
*);
3527 static void fill_auxv_note(struct memelfnote
*, const TaskState
*);
3528 static void fill_elf_note_phdr(struct elf_phdr
*, int, off_t
);
3529 static size_t note_size(const struct memelfnote
*);
3530 static void free_note_info(struct elf_note_info
*);
3531 static int fill_note_info(struct elf_note_info
*, long, const CPUArchState
*);
3532 static void fill_thread_info(struct elf_note_info
*, const CPUArchState
*);
3534 static int dump_write(int, const void *, size_t);
3535 static int write_note(struct memelfnote
*, int);
3536 static int write_note_info(struct elf_note_info
*, int);
3539 static void bswap_prstatus(struct target_elf_prstatus
*prstatus
)
3541 prstatus
->pr_info
.si_signo
= tswap32(prstatus
->pr_info
.si_signo
);
3542 prstatus
->pr_info
.si_code
= tswap32(prstatus
->pr_info
.si_code
);
3543 prstatus
->pr_info
.si_errno
= tswap32(prstatus
->pr_info
.si_errno
);
3544 prstatus
->pr_cursig
= tswap16(prstatus
->pr_cursig
);
3545 prstatus
->pr_sigpend
= tswapal(prstatus
->pr_sigpend
);
3546 prstatus
->pr_sighold
= tswapal(prstatus
->pr_sighold
);
3547 prstatus
->pr_pid
= tswap32(prstatus
->pr_pid
);
3548 prstatus
->pr_ppid
= tswap32(prstatus
->pr_ppid
);
3549 prstatus
->pr_pgrp
= tswap32(prstatus
->pr_pgrp
);
3550 prstatus
->pr_sid
= tswap32(prstatus
->pr_sid
);
3551 /* cpu times are not filled, so we skip them */
3552 /* regs should be in correct format already */
3553 prstatus
->pr_fpvalid
= tswap32(prstatus
->pr_fpvalid
);
3556 static void bswap_psinfo(struct target_elf_prpsinfo
*psinfo
)
3558 psinfo
->pr_flag
= tswapal(psinfo
->pr_flag
);
3559 psinfo
->pr_uid
= tswap16(psinfo
->pr_uid
);
3560 psinfo
->pr_gid
= tswap16(psinfo
->pr_gid
);
3561 psinfo
->pr_pid
= tswap32(psinfo
->pr_pid
);
3562 psinfo
->pr_ppid
= tswap32(psinfo
->pr_ppid
);
3563 psinfo
->pr_pgrp
= tswap32(psinfo
->pr_pgrp
);
3564 psinfo
->pr_sid
= tswap32(psinfo
->pr_sid
);
3567 static void bswap_note(struct elf_note
*en
)
3569 bswap32s(&en
->n_namesz
);
3570 bswap32s(&en
->n_descsz
);
3571 bswap32s(&en
->n_type
);
3574 static inline void bswap_prstatus(struct target_elf_prstatus
*p
) { }
3575 static inline void bswap_psinfo(struct target_elf_prpsinfo
*p
) {}
3576 static inline void bswap_note(struct elf_note
*en
) { }
3577 #endif /* BSWAP_NEEDED */
3580 * Minimal support for linux memory regions. These are needed
3581 * when we are finding out what memory exactly belongs to
3582 * emulated process. No locks needed here, as long as
3583 * thread that received the signal is stopped.
3586 static struct mm_struct
*vma_init(void)
3588 struct mm_struct
*mm
;
3590 if ((mm
= g_malloc(sizeof (*mm
))) == NULL
)
3594 QTAILQ_INIT(&mm
->mm_mmap
);
3599 static void vma_delete(struct mm_struct
*mm
)
3601 struct vm_area_struct
*vma
;
3603 while ((vma
= vma_first(mm
)) != NULL
) {
3604 QTAILQ_REMOVE(&mm
->mm_mmap
, vma
, vma_link
);
3610 static int vma_add_mapping(struct mm_struct
*mm
, target_ulong start
,
3611 target_ulong end
, abi_ulong flags
)
3613 struct vm_area_struct
*vma
;
3615 if ((vma
= g_malloc0(sizeof (*vma
))) == NULL
)
3618 vma
->vma_start
= start
;
3620 vma
->vma_flags
= flags
;
3622 QTAILQ_INSERT_TAIL(&mm
->mm_mmap
, vma
, vma_link
);
3628 static struct vm_area_struct
*vma_first(const struct mm_struct
*mm
)
3630 return (QTAILQ_FIRST(&mm
->mm_mmap
));
3633 static struct vm_area_struct
*vma_next(struct vm_area_struct
*vma
)
3635 return (QTAILQ_NEXT(vma
, vma_link
));
3638 static int vma_get_mapping_count(const struct mm_struct
*mm
)
3640 return (mm
->mm_count
);
3644 * Calculate file (dump) size of given memory region.
3646 static abi_ulong
vma_dump_size(const struct vm_area_struct
*vma
)
3648 /* if we cannot even read the first page, skip it */
3649 if (!access_ok_untagged(VERIFY_READ
, vma
->vma_start
, TARGET_PAGE_SIZE
))
3653 * Usually we don't dump executable pages as they contain
3654 * non-writable code that debugger can read directly from
3655 * target library etc. However, thread stacks are marked
3656 * also executable so we read in first page of given region
3657 * and check whether it contains elf header. If there is
3658 * no elf header, we dump it.
3660 if (vma
->vma_flags
& PROT_EXEC
) {
3661 char page
[TARGET_PAGE_SIZE
];
3663 if (copy_from_user(page
, vma
->vma_start
, sizeof (page
))) {
3666 if ((page
[EI_MAG0
] == ELFMAG0
) &&
3667 (page
[EI_MAG1
] == ELFMAG1
) &&
3668 (page
[EI_MAG2
] == ELFMAG2
) &&
3669 (page
[EI_MAG3
] == ELFMAG3
)) {
3671 * Mappings are possibly from ELF binary. Don't dump
3678 return (vma
->vma_end
- vma
->vma_start
);
3681 static int vma_walker(void *priv
, target_ulong start
, target_ulong end
,
3682 unsigned long flags
)
3684 struct mm_struct
*mm
= (struct mm_struct
*)priv
;
3686 vma_add_mapping(mm
, start
, end
, flags
);
3690 static void fill_note(struct memelfnote
*note
, const char *name
, int type
,
3691 unsigned int sz
, void *data
)
3693 unsigned int namesz
;
3695 namesz
= strlen(name
) + 1;
3697 note
->namesz
= namesz
;
3698 note
->namesz_rounded
= roundup(namesz
, sizeof (int32_t));
3701 note
->datasz_rounded
= roundup(sz
, sizeof (int32_t));
3706 * We calculate rounded up note size here as specified by
3709 note
->notesz
= sizeof (struct elf_note
) +
3710 note
->namesz_rounded
+ note
->datasz_rounded
;
3713 static void fill_elf_header(struct elfhdr
*elf
, int segs
, uint16_t machine
,
3716 (void) memset(elf
, 0, sizeof(*elf
));
3718 (void) memcpy(elf
->e_ident
, ELFMAG
, SELFMAG
);
3719 elf
->e_ident
[EI_CLASS
] = ELF_CLASS
;
3720 elf
->e_ident
[EI_DATA
] = ELF_DATA
;
3721 elf
->e_ident
[EI_VERSION
] = EV_CURRENT
;
3722 elf
->e_ident
[EI_OSABI
] = ELF_OSABI
;
3724 elf
->e_type
= ET_CORE
;
3725 elf
->e_machine
= machine
;
3726 elf
->e_version
= EV_CURRENT
;
3727 elf
->e_phoff
= sizeof(struct elfhdr
);
3728 elf
->e_flags
= flags
;
3729 elf
->e_ehsize
= sizeof(struct elfhdr
);
3730 elf
->e_phentsize
= sizeof(struct elf_phdr
);
3731 elf
->e_phnum
= segs
;
3736 static void fill_elf_note_phdr(struct elf_phdr
*phdr
, int sz
, off_t offset
)
3738 phdr
->p_type
= PT_NOTE
;
3739 phdr
->p_offset
= offset
;
3742 phdr
->p_filesz
= sz
;
3747 bswap_phdr(phdr
, 1);
3750 static size_t note_size(const struct memelfnote
*note
)
3752 return (note
->notesz
);
3755 static void fill_prstatus(struct target_elf_prstatus
*prstatus
,
3756 const TaskState
*ts
, int signr
)
3758 (void) memset(prstatus
, 0, sizeof (*prstatus
));
3759 prstatus
->pr_info
.si_signo
= prstatus
->pr_cursig
= signr
;
3760 prstatus
->pr_pid
= ts
->ts_tid
;
3761 prstatus
->pr_ppid
= getppid();
3762 prstatus
->pr_pgrp
= getpgrp();
3763 prstatus
->pr_sid
= getsid(0);
3765 bswap_prstatus(prstatus
);
3768 static int fill_psinfo(struct target_elf_prpsinfo
*psinfo
, const TaskState
*ts
)
3770 char *base_filename
;
3771 unsigned int i
, len
;
3773 (void) memset(psinfo
, 0, sizeof (*psinfo
));
3775 len
= ts
->info
->env_strings
- ts
->info
->arg_strings
;
3776 if (len
>= ELF_PRARGSZ
)
3777 len
= ELF_PRARGSZ
- 1;
3778 if (copy_from_user(&psinfo
->pr_psargs
, ts
->info
->arg_strings
, len
)) {
3781 for (i
= 0; i
< len
; i
++)
3782 if (psinfo
->pr_psargs
[i
] == 0)
3783 psinfo
->pr_psargs
[i
] = ' ';
3784 psinfo
->pr_psargs
[len
] = 0;
3786 psinfo
->pr_pid
= getpid();
3787 psinfo
->pr_ppid
= getppid();
3788 psinfo
->pr_pgrp
= getpgrp();
3789 psinfo
->pr_sid
= getsid(0);
3790 psinfo
->pr_uid
= getuid();
3791 psinfo
->pr_gid
= getgid();
3793 base_filename
= g_path_get_basename(ts
->bprm
->filename
);
3795 * Using strncpy here is fine: at max-length,
3796 * this field is not NUL-terminated.
3798 (void) strncpy(psinfo
->pr_fname
, base_filename
,
3799 sizeof(psinfo
->pr_fname
));
3801 g_free(base_filename
);
3802 bswap_psinfo(psinfo
);
3806 static void fill_auxv_note(struct memelfnote
*note
, const TaskState
*ts
)
3808 elf_addr_t auxv
= (elf_addr_t
)ts
->info
->saved_auxv
;
3809 elf_addr_t orig_auxv
= auxv
;
3811 int len
= ts
->info
->auxv_len
;
3814 * Auxiliary vector is stored in target process stack. It contains
3815 * {type, value} pairs that we need to dump into note. This is not
3816 * strictly necessary but we do it here for sake of completeness.
3819 /* read in whole auxv vector and copy it to memelfnote */
3820 ptr
= lock_user(VERIFY_READ
, orig_auxv
, len
, 0);
3822 fill_note(note
, "CORE", NT_AUXV
, len
, ptr
);
3823 unlock_user(ptr
, auxv
, len
);
3828 * Constructs name of coredump file. We have following convention
3830 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
3832 * Returns the filename
3834 static char *core_dump_filename(const TaskState
*ts
)
3836 g_autoptr(GDateTime
) now
= g_date_time_new_now_local();
3837 g_autofree
char *nowstr
= g_date_time_format(now
, "%Y%m%d-%H%M%S");
3838 g_autofree
char *base_filename
= g_path_get_basename(ts
->bprm
->filename
);
3840 return g_strdup_printf("qemu_%s_%s_%d.core",
3841 base_filename
, nowstr
, (int)getpid());
3844 static int dump_write(int fd
, const void *ptr
, size_t size
)
3846 const char *bufp
= (const char *)ptr
;
3847 ssize_t bytes_written
, bytes_left
;
3848 struct rlimit dumpsize
;
3852 getrlimit(RLIMIT_CORE
, &dumpsize
);
3853 if ((pos
= lseek(fd
, 0, SEEK_CUR
))==-1) {
3854 if (errno
== ESPIPE
) { /* not a seekable stream */
3860 if (dumpsize
.rlim_cur
<= pos
) {
3862 } else if (dumpsize
.rlim_cur
== RLIM_INFINITY
) {
3865 size_t limit_left
=dumpsize
.rlim_cur
- pos
;
3866 bytes_left
= limit_left
>= size
? size
: limit_left
;
3871 * In normal conditions, single write(2) should do but
3872 * in case of socket etc. this mechanism is more portable.
3875 bytes_written
= write(fd
, bufp
, bytes_left
);
3876 if (bytes_written
< 0) {
3880 } else if (bytes_written
== 0) { /* eof */
3883 bufp
+= bytes_written
;
3884 bytes_left
-= bytes_written
;
3885 } while (bytes_left
> 0);
3890 static int write_note(struct memelfnote
*men
, int fd
)
3894 en
.n_namesz
= men
->namesz
;
3895 en
.n_type
= men
->type
;
3896 en
.n_descsz
= men
->datasz
;
3900 if (dump_write(fd
, &en
, sizeof(en
)) != 0)
3902 if (dump_write(fd
, men
->name
, men
->namesz_rounded
) != 0)
3904 if (dump_write(fd
, men
->data
, men
->datasz_rounded
) != 0)
3910 static void fill_thread_info(struct elf_note_info
*info
, const CPUArchState
*env
)
3912 CPUState
*cpu
= env_cpu((CPUArchState
*)env
);
3913 TaskState
*ts
= (TaskState
*)cpu
->opaque
;
3914 struct elf_thread_status
*ets
;
3916 ets
= g_malloc0(sizeof (*ets
));
3917 ets
->num_notes
= 1; /* only prstatus is dumped */
3918 fill_prstatus(&ets
->prstatus
, ts
, 0);
3919 elf_core_copy_regs(&ets
->prstatus
.pr_reg
, env
);
3920 fill_note(&ets
->notes
[0], "CORE", NT_PRSTATUS
, sizeof (ets
->prstatus
),
3923 QTAILQ_INSERT_TAIL(&info
->thread_list
, ets
, ets_link
);
3925 info
->notes_size
+= note_size(&ets
->notes
[0]);
3928 static void init_note_info(struct elf_note_info
*info
)
3930 /* Initialize the elf_note_info structure so that it is at
3931 * least safe to call free_note_info() on it. Must be
3932 * called before calling fill_note_info().
3934 memset(info
, 0, sizeof (*info
));
3935 QTAILQ_INIT(&info
->thread_list
);
3938 static int fill_note_info(struct elf_note_info
*info
,
3939 long signr
, const CPUArchState
*env
)
3942 CPUState
*cpu
= env_cpu((CPUArchState
*)env
);
3943 TaskState
*ts
= (TaskState
*)cpu
->opaque
;
3946 info
->notes
= g_new0(struct memelfnote
, NUMNOTES
);
3947 if (info
->notes
== NULL
)
3949 info
->prstatus
= g_malloc0(sizeof (*info
->prstatus
));
3950 if (info
->prstatus
== NULL
)
3952 info
->psinfo
= g_malloc0(sizeof (*info
->psinfo
));
3953 if (info
->prstatus
== NULL
)
3957 * First fill in status (and registers) of current thread
3958 * including process info & aux vector.
3960 fill_prstatus(info
->prstatus
, ts
, signr
);
3961 elf_core_copy_regs(&info
->prstatus
->pr_reg
, env
);
3962 fill_note(&info
->notes
[0], "CORE", NT_PRSTATUS
,
3963 sizeof (*info
->prstatus
), info
->prstatus
);
3964 fill_psinfo(info
->psinfo
, ts
);
3965 fill_note(&info
->notes
[1], "CORE", NT_PRPSINFO
,
3966 sizeof (*info
->psinfo
), info
->psinfo
);
3967 fill_auxv_note(&info
->notes
[2], ts
);
3970 info
->notes_size
= 0;
3971 for (i
= 0; i
< info
->numnote
; i
++)
3972 info
->notes_size
+= note_size(&info
->notes
[i
]);
3974 /* read and fill status of all threads */
3977 if (cpu
== thread_cpu
) {
3980 fill_thread_info(info
, cpu
->env_ptr
);
3987 static void free_note_info(struct elf_note_info
*info
)
3989 struct elf_thread_status
*ets
;
3991 while (!QTAILQ_EMPTY(&info
->thread_list
)) {
3992 ets
= QTAILQ_FIRST(&info
->thread_list
);
3993 QTAILQ_REMOVE(&info
->thread_list
, ets
, ets_link
);
3997 g_free(info
->prstatus
);
3998 g_free(info
->psinfo
);
3999 g_free(info
->notes
);
4002 static int write_note_info(struct elf_note_info
*info
, int fd
)
4004 struct elf_thread_status
*ets
;
4007 /* write prstatus, psinfo and auxv for current thread */
4008 for (i
= 0; i
< info
->numnote
; i
++)
4009 if ((error
= write_note(&info
->notes
[i
], fd
)) != 0)
4012 /* write prstatus for each thread */
4013 QTAILQ_FOREACH(ets
, &info
->thread_list
, ets_link
) {
4014 if ((error
= write_note(&ets
->notes
[0], fd
)) != 0)
4022 * Write out ELF coredump.
4024 * See documentation of ELF object file format in:
4025 * http://www.caldera.com/developers/devspecs/gabi41.pdf
4027 * Coredump format in linux is following:
4029 * 0 +----------------------+ \
4030 * | ELF header | ET_CORE |
4031 * +----------------------+ |
4032 * | ELF program headers | |--- headers
4033 * | - NOTE section | |
4034 * | - PT_LOAD sections | |
4035 * +----------------------+ /
4040 * +----------------------+ <-- aligned to target page
4041 * | Process memory dump |
4046 * +----------------------+
4048 * NT_PRSTATUS -> struct elf_prstatus (per thread)
4049 * NT_PRSINFO -> struct elf_prpsinfo
4050 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
4052 * Format follows System V format as close as possible. Current
4053 * version limitations are as follows:
4054 * - no floating point registers are dumped
4056 * Function returns 0 in case of success, negative errno otherwise.
4058 * TODO: make this work also during runtime: it should be
4059 * possible to force coredump from running process and then
4060 * continue processing. For example qemu could set up SIGUSR2
4061 * handler (provided that target process haven't registered
4062 * handler for that) that does the dump when signal is received.
4064 static int elf_core_dump(int signr
, const CPUArchState
*env
)
4066 const CPUState
*cpu
= env_cpu((CPUArchState
*)env
);
4067 const TaskState
*ts
= (const TaskState
*)cpu
->opaque
;
4068 struct vm_area_struct
*vma
= NULL
;
4069 g_autofree
char *corefile
= NULL
;
4070 struct elf_note_info info
;
4072 struct elf_phdr phdr
;
4073 struct rlimit dumpsize
;
4074 struct mm_struct
*mm
= NULL
;
4075 off_t offset
= 0, data_offset
= 0;
4079 init_note_info(&info
);
4082 getrlimit(RLIMIT_CORE
, &dumpsize
);
4083 if (dumpsize
.rlim_cur
== 0)
4086 corefile
= core_dump_filename(ts
);
4088 if ((fd
= open(corefile
, O_WRONLY
| O_CREAT
,
4089 S_IRUSR
|S_IWUSR
|S_IRGRP
|S_IROTH
)) < 0)
4093 * Walk through target process memory mappings and
4094 * set up structure containing this information. After
4095 * this point vma_xxx functions can be used.
4097 if ((mm
= vma_init()) == NULL
)
4100 walk_memory_regions(mm
, vma_walker
);
4101 segs
= vma_get_mapping_count(mm
);
4104 * Construct valid coredump ELF header. We also
4105 * add one more segment for notes.
4107 fill_elf_header(&elf
, segs
+ 1, ELF_MACHINE
, 0);
4108 if (dump_write(fd
, &elf
, sizeof (elf
)) != 0)
4111 /* fill in the in-memory version of notes */
4112 if (fill_note_info(&info
, signr
, env
) < 0)
4115 offset
+= sizeof (elf
); /* elf header */
4116 offset
+= (segs
+ 1) * sizeof (struct elf_phdr
); /* program headers */
4118 /* write out notes program header */
4119 fill_elf_note_phdr(&phdr
, info
.notes_size
, offset
);
4121 offset
+= info
.notes_size
;
4122 if (dump_write(fd
, &phdr
, sizeof (phdr
)) != 0)
4126 * ELF specification wants data to start at page boundary so
4129 data_offset
= offset
= roundup(offset
, ELF_EXEC_PAGESIZE
);
4132 * Write program headers for memory regions mapped in
4133 * the target process.
4135 for (vma
= vma_first(mm
); vma
!= NULL
; vma
= vma_next(vma
)) {
4136 (void) memset(&phdr
, 0, sizeof (phdr
));
4138 phdr
.p_type
= PT_LOAD
;
4139 phdr
.p_offset
= offset
;
4140 phdr
.p_vaddr
= vma
->vma_start
;
4142 phdr
.p_filesz
= vma_dump_size(vma
);
4143 offset
+= phdr
.p_filesz
;
4144 phdr
.p_memsz
= vma
->vma_end
- vma
->vma_start
;
4145 phdr
.p_flags
= vma
->vma_flags
& PROT_READ
? PF_R
: 0;
4146 if (vma
->vma_flags
& PROT_WRITE
)
4147 phdr
.p_flags
|= PF_W
;
4148 if (vma
->vma_flags
& PROT_EXEC
)
4149 phdr
.p_flags
|= PF_X
;
4150 phdr
.p_align
= ELF_EXEC_PAGESIZE
;
4152 bswap_phdr(&phdr
, 1);
4153 if (dump_write(fd
, &phdr
, sizeof(phdr
)) != 0) {
4159 * Next we write notes just after program headers. No
4160 * alignment needed here.
4162 if (write_note_info(&info
, fd
) < 0)
4165 /* align data to page boundary */
4166 if (lseek(fd
, data_offset
, SEEK_SET
) != data_offset
)
4170 * Finally we can dump process memory into corefile as well.
4172 for (vma
= vma_first(mm
); vma
!= NULL
; vma
= vma_next(vma
)) {
4176 end
= vma
->vma_start
+ vma_dump_size(vma
);
4178 for (addr
= vma
->vma_start
; addr
< end
;
4179 addr
+= TARGET_PAGE_SIZE
) {
4180 char page
[TARGET_PAGE_SIZE
];
4184 * Read in page from target process memory and
4185 * write it to coredump file.
4187 error
= copy_from_user(page
, addr
, sizeof (page
));
4189 (void) fprintf(stderr
, "unable to dump " TARGET_ABI_FMT_lx
"\n",
4194 if (dump_write(fd
, page
, TARGET_PAGE_SIZE
) < 0)
4200 free_note_info(&info
);
4209 #endif /* USE_ELF_CORE_DUMP */
4211 void do_init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
4213 init_thread(regs
, infop
);