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 "disas/disas.h"
10 #include "qemu/bitops.h"
11 #include "qemu/path.h"
12 #include "qemu/queue.h"
13 #include "qemu/guest-random.h"
14 #include "qemu/units.h"
15 #include "qemu/selfmap.h"
16 #include "qapi/error.h"
28 #define ELF_OSABI ELFOSABI_SYSV
30 /* from personality.h */
33 * Flags for bug emulation.
35 * These occupy the top three bytes.
38 ADDR_NO_RANDOMIZE
= 0x0040000, /* disable randomization of VA space */
39 FDPIC_FUNCPTRS
= 0x0080000, /* userspace function ptrs point to
40 descriptors (signal handling) */
41 MMAP_PAGE_ZERO
= 0x0100000,
42 ADDR_COMPAT_LAYOUT
= 0x0200000,
43 READ_IMPLIES_EXEC
= 0x0400000,
44 ADDR_LIMIT_32BIT
= 0x0800000,
45 SHORT_INODE
= 0x1000000,
46 WHOLE_SECONDS
= 0x2000000,
47 STICKY_TIMEOUTS
= 0x4000000,
48 ADDR_LIMIT_3GB
= 0x8000000,
54 * These go in the low byte. Avoid using the top bit, it will
55 * conflict with error returns.
59 PER_LINUX_32BIT
= 0x0000 | ADDR_LIMIT_32BIT
,
60 PER_LINUX_FDPIC
= 0x0000 | FDPIC_FUNCPTRS
,
61 PER_SVR4
= 0x0001 | STICKY_TIMEOUTS
| MMAP_PAGE_ZERO
,
62 PER_SVR3
= 0x0002 | STICKY_TIMEOUTS
| SHORT_INODE
,
63 PER_SCOSVR3
= 0x0003 | STICKY_TIMEOUTS
| WHOLE_SECONDS
| SHORT_INODE
,
64 PER_OSR5
= 0x0003 | STICKY_TIMEOUTS
| WHOLE_SECONDS
,
65 PER_WYSEV386
= 0x0004 | STICKY_TIMEOUTS
| SHORT_INODE
,
66 PER_ISCR4
= 0x0005 | STICKY_TIMEOUTS
,
68 PER_SUNOS
= 0x0006 | STICKY_TIMEOUTS
,
69 PER_XENIX
= 0x0007 | STICKY_TIMEOUTS
| SHORT_INODE
,
71 PER_LINUX32_3GB
= 0x0008 | ADDR_LIMIT_3GB
,
72 PER_IRIX32
= 0x0009 | STICKY_TIMEOUTS
,/* IRIX5 32-bit */
73 PER_IRIXN32
= 0x000a | STICKY_TIMEOUTS
,/* IRIX6 new 32-bit */
74 PER_IRIX64
= 0x000b | STICKY_TIMEOUTS
,/* IRIX6 64-bit */
76 PER_SOLARIS
= 0x000d | STICKY_TIMEOUTS
,
77 PER_UW7
= 0x000e | STICKY_TIMEOUTS
| MMAP_PAGE_ZERO
,
78 PER_OSF4
= 0x000f, /* OSF/1 v4 */
84 * Return the base personality without flags.
86 #define personality(pers) (pers & PER_MASK)
88 int info_is_fdpic(struct image_info
*info
)
90 return info
->personality
== PER_LINUX_FDPIC
;
93 /* this flag is uneffective under linux too, should be deleted */
95 #define MAP_DENYWRITE 0
98 /* should probably go in elf.h */
103 #ifdef TARGET_WORDS_BIGENDIAN
104 #define ELF_DATA ELFDATA2MSB
106 #define ELF_DATA ELFDATA2LSB
109 #ifdef TARGET_ABI_MIPSN32
110 typedef abi_ullong target_elf_greg_t
;
111 #define tswapreg(ptr) tswap64(ptr)
113 typedef abi_ulong target_elf_greg_t
;
114 #define tswapreg(ptr) tswapal(ptr)
118 typedef abi_ushort target_uid_t
;
119 typedef abi_ushort target_gid_t
;
121 typedef abi_uint target_uid_t
;
122 typedef abi_uint target_gid_t
;
124 typedef abi_int target_pid_t
;
128 #define ELF_PLATFORM get_elf_platform()
130 static const char *get_elf_platform(void)
132 static char elf_platform
[] = "i386";
133 int family
= object_property_get_int(OBJECT(thread_cpu
), "family", NULL
);
137 elf_platform
[1] = '0' + family
;
141 #define ELF_HWCAP get_elf_hwcap()
143 static uint32_t get_elf_hwcap(void)
145 X86CPU
*cpu
= X86_CPU(thread_cpu
);
147 return cpu
->env
.features
[FEAT_1_EDX
];
151 #define ELF_START_MMAP 0x2aaaaab000ULL
153 #define ELF_CLASS ELFCLASS64
154 #define ELF_ARCH EM_X86_64
156 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
159 regs
->rsp
= infop
->start_stack
;
160 regs
->rip
= infop
->entry
;
164 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
167 * Note that ELF_NREG should be 29 as there should be place for
168 * TRAPNO and ERR "registers" as well but linux doesn't dump
171 * See linux kernel: arch/x86/include/asm/elf.h
173 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUX86State
*env
)
175 (*regs
)[0] = env
->regs
[15];
176 (*regs
)[1] = env
->regs
[14];
177 (*regs
)[2] = env
->regs
[13];
178 (*regs
)[3] = env
->regs
[12];
179 (*regs
)[4] = env
->regs
[R_EBP
];
180 (*regs
)[5] = env
->regs
[R_EBX
];
181 (*regs
)[6] = env
->regs
[11];
182 (*regs
)[7] = env
->regs
[10];
183 (*regs
)[8] = env
->regs
[9];
184 (*regs
)[9] = env
->regs
[8];
185 (*regs
)[10] = env
->regs
[R_EAX
];
186 (*regs
)[11] = env
->regs
[R_ECX
];
187 (*regs
)[12] = env
->regs
[R_EDX
];
188 (*regs
)[13] = env
->regs
[R_ESI
];
189 (*regs
)[14] = env
->regs
[R_EDI
];
190 (*regs
)[15] = env
->regs
[R_EAX
]; /* XXX */
191 (*regs
)[16] = env
->eip
;
192 (*regs
)[17] = env
->segs
[R_CS
].selector
& 0xffff;
193 (*regs
)[18] = env
->eflags
;
194 (*regs
)[19] = env
->regs
[R_ESP
];
195 (*regs
)[20] = env
->segs
[R_SS
].selector
& 0xffff;
196 (*regs
)[21] = env
->segs
[R_FS
].selector
& 0xffff;
197 (*regs
)[22] = env
->segs
[R_GS
].selector
& 0xffff;
198 (*regs
)[23] = env
->segs
[R_DS
].selector
& 0xffff;
199 (*regs
)[24] = env
->segs
[R_ES
].selector
& 0xffff;
200 (*regs
)[25] = env
->segs
[R_FS
].selector
& 0xffff;
201 (*regs
)[26] = env
->segs
[R_GS
].selector
& 0xffff;
206 #define ELF_START_MMAP 0x80000000
209 * This is used to ensure we don't load something for the wrong architecture.
211 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
214 * These are used to set parameters in the core dumps.
216 #define ELF_CLASS ELFCLASS32
217 #define ELF_ARCH EM_386
219 static inline void init_thread(struct target_pt_regs
*regs
,
220 struct image_info
*infop
)
222 regs
->esp
= infop
->start_stack
;
223 regs
->eip
= infop
->entry
;
225 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
226 starts %edx contains a pointer to a function which might be
227 registered using `atexit'. This provides a mean for the
228 dynamic linker to call DT_FINI functions for shared libraries
229 that have been loaded before the code runs.
231 A value of 0 tells we have no such handler. */
236 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
239 * Note that ELF_NREG should be 19 as there should be place for
240 * TRAPNO and ERR "registers" as well but linux doesn't dump
243 * See linux kernel: arch/x86/include/asm/elf.h
245 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUX86State
*env
)
247 (*regs
)[0] = env
->regs
[R_EBX
];
248 (*regs
)[1] = env
->regs
[R_ECX
];
249 (*regs
)[2] = env
->regs
[R_EDX
];
250 (*regs
)[3] = env
->regs
[R_ESI
];
251 (*regs
)[4] = env
->regs
[R_EDI
];
252 (*regs
)[5] = env
->regs
[R_EBP
];
253 (*regs
)[6] = env
->regs
[R_EAX
];
254 (*regs
)[7] = env
->segs
[R_DS
].selector
& 0xffff;
255 (*regs
)[8] = env
->segs
[R_ES
].selector
& 0xffff;
256 (*regs
)[9] = env
->segs
[R_FS
].selector
& 0xffff;
257 (*regs
)[10] = env
->segs
[R_GS
].selector
& 0xffff;
258 (*regs
)[11] = env
->regs
[R_EAX
]; /* XXX */
259 (*regs
)[12] = env
->eip
;
260 (*regs
)[13] = env
->segs
[R_CS
].selector
& 0xffff;
261 (*regs
)[14] = env
->eflags
;
262 (*regs
)[15] = env
->regs
[R_ESP
];
263 (*regs
)[16] = env
->segs
[R_SS
].selector
& 0xffff;
267 #define USE_ELF_CORE_DUMP
268 #define ELF_EXEC_PAGESIZE 4096
274 #ifndef TARGET_AARCH64
275 /* 32 bit ARM definitions */
277 #define ELF_START_MMAP 0x80000000
279 #define ELF_ARCH EM_ARM
280 #define ELF_CLASS ELFCLASS32
282 static inline void init_thread(struct target_pt_regs
*regs
,
283 struct image_info
*infop
)
285 abi_long stack
= infop
->start_stack
;
286 memset(regs
, 0, sizeof(*regs
));
288 regs
->uregs
[16] = ARM_CPU_MODE_USR
;
289 if (infop
->entry
& 1) {
290 regs
->uregs
[16] |= CPSR_T
;
292 regs
->uregs
[15] = infop
->entry
& 0xfffffffe;
293 regs
->uregs
[13] = infop
->start_stack
;
294 /* FIXME - what to for failure of get_user()? */
295 get_user_ual(regs
->uregs
[2], stack
+ 8); /* envp */
296 get_user_ual(regs
->uregs
[1], stack
+ 4); /* envp */
297 /* XXX: it seems that r0 is zeroed after ! */
299 /* For uClinux PIC binaries. */
300 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
301 regs
->uregs
[10] = infop
->start_data
;
303 /* Support ARM FDPIC. */
304 if (info_is_fdpic(infop
)) {
305 /* As described in the ABI document, r7 points to the loadmap info
306 * prepared by the kernel. If an interpreter is needed, r8 points
307 * to the interpreter loadmap and r9 points to the interpreter
308 * PT_DYNAMIC info. If no interpreter is needed, r8 is zero, and
309 * r9 points to the main program PT_DYNAMIC info.
311 regs
->uregs
[7] = infop
->loadmap_addr
;
312 if (infop
->interpreter_loadmap_addr
) {
313 /* Executable is dynamically loaded. */
314 regs
->uregs
[8] = infop
->interpreter_loadmap_addr
;
315 regs
->uregs
[9] = infop
->interpreter_pt_dynamic_addr
;
318 regs
->uregs
[9] = infop
->pt_dynamic_addr
;
324 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
326 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUARMState
*env
)
328 (*regs
)[0] = tswapreg(env
->regs
[0]);
329 (*regs
)[1] = tswapreg(env
->regs
[1]);
330 (*regs
)[2] = tswapreg(env
->regs
[2]);
331 (*regs
)[3] = tswapreg(env
->regs
[3]);
332 (*regs
)[4] = tswapreg(env
->regs
[4]);
333 (*regs
)[5] = tswapreg(env
->regs
[5]);
334 (*regs
)[6] = tswapreg(env
->regs
[6]);
335 (*regs
)[7] = tswapreg(env
->regs
[7]);
336 (*regs
)[8] = tswapreg(env
->regs
[8]);
337 (*regs
)[9] = tswapreg(env
->regs
[9]);
338 (*regs
)[10] = tswapreg(env
->regs
[10]);
339 (*regs
)[11] = tswapreg(env
->regs
[11]);
340 (*regs
)[12] = tswapreg(env
->regs
[12]);
341 (*regs
)[13] = tswapreg(env
->regs
[13]);
342 (*regs
)[14] = tswapreg(env
->regs
[14]);
343 (*regs
)[15] = tswapreg(env
->regs
[15]);
345 (*regs
)[16] = tswapreg(cpsr_read((CPUARMState
*)env
));
346 (*regs
)[17] = tswapreg(env
->regs
[0]); /* XXX */
349 #define USE_ELF_CORE_DUMP
350 #define ELF_EXEC_PAGESIZE 4096
354 ARM_HWCAP_ARM_SWP
= 1 << 0,
355 ARM_HWCAP_ARM_HALF
= 1 << 1,
356 ARM_HWCAP_ARM_THUMB
= 1 << 2,
357 ARM_HWCAP_ARM_26BIT
= 1 << 3,
358 ARM_HWCAP_ARM_FAST_MULT
= 1 << 4,
359 ARM_HWCAP_ARM_FPA
= 1 << 5,
360 ARM_HWCAP_ARM_VFP
= 1 << 6,
361 ARM_HWCAP_ARM_EDSP
= 1 << 7,
362 ARM_HWCAP_ARM_JAVA
= 1 << 8,
363 ARM_HWCAP_ARM_IWMMXT
= 1 << 9,
364 ARM_HWCAP_ARM_CRUNCH
= 1 << 10,
365 ARM_HWCAP_ARM_THUMBEE
= 1 << 11,
366 ARM_HWCAP_ARM_NEON
= 1 << 12,
367 ARM_HWCAP_ARM_VFPv3
= 1 << 13,
368 ARM_HWCAP_ARM_VFPv3D16
= 1 << 14,
369 ARM_HWCAP_ARM_TLS
= 1 << 15,
370 ARM_HWCAP_ARM_VFPv4
= 1 << 16,
371 ARM_HWCAP_ARM_IDIVA
= 1 << 17,
372 ARM_HWCAP_ARM_IDIVT
= 1 << 18,
373 ARM_HWCAP_ARM_VFPD32
= 1 << 19,
374 ARM_HWCAP_ARM_LPAE
= 1 << 20,
375 ARM_HWCAP_ARM_EVTSTRM
= 1 << 21,
379 ARM_HWCAP2_ARM_AES
= 1 << 0,
380 ARM_HWCAP2_ARM_PMULL
= 1 << 1,
381 ARM_HWCAP2_ARM_SHA1
= 1 << 2,
382 ARM_HWCAP2_ARM_SHA2
= 1 << 3,
383 ARM_HWCAP2_ARM_CRC32
= 1 << 4,
386 /* The commpage only exists for 32 bit kernels */
388 #define ARM_COMMPAGE (intptr_t)0xffff0f00u
390 static bool init_guest_commpage(void)
392 void *want
= g2h_untagged(ARM_COMMPAGE
& -qemu_host_page_size
);
393 void *addr
= mmap(want
, qemu_host_page_size
, PROT_READ
| PROT_WRITE
,
394 MAP_ANONYMOUS
| MAP_PRIVATE
| MAP_FIXED
, -1, 0);
396 if (addr
== MAP_FAILED
) {
397 perror("Allocating guest commpage");
404 /* Set kernel helper versions; rest of page is 0. */
405 __put_user(5, (uint32_t *)g2h_untagged(0xffff0ffcu
));
407 if (mprotect(addr
, qemu_host_page_size
, PROT_READ
)) {
408 perror("Protecting guest commpage");
414 #define ELF_HWCAP get_elf_hwcap()
415 #define ELF_HWCAP2 get_elf_hwcap2()
417 static uint32_t get_elf_hwcap(void)
419 ARMCPU
*cpu
= ARM_CPU(thread_cpu
);
422 hwcaps
|= ARM_HWCAP_ARM_SWP
;
423 hwcaps
|= ARM_HWCAP_ARM_HALF
;
424 hwcaps
|= ARM_HWCAP_ARM_THUMB
;
425 hwcaps
|= ARM_HWCAP_ARM_FAST_MULT
;
427 /* probe for the extra features */
428 #define GET_FEATURE(feat, hwcap) \
429 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
431 #define GET_FEATURE_ID(feat, hwcap) \
432 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
434 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
435 GET_FEATURE(ARM_FEATURE_V5
, ARM_HWCAP_ARM_EDSP
);
436 GET_FEATURE(ARM_FEATURE_IWMMXT
, ARM_HWCAP_ARM_IWMMXT
);
437 GET_FEATURE(ARM_FEATURE_THUMB2EE
, ARM_HWCAP_ARM_THUMBEE
);
438 GET_FEATURE(ARM_FEATURE_NEON
, ARM_HWCAP_ARM_NEON
);
439 GET_FEATURE(ARM_FEATURE_V6K
, ARM_HWCAP_ARM_TLS
);
440 GET_FEATURE(ARM_FEATURE_LPAE
, ARM_HWCAP_ARM_LPAE
);
441 GET_FEATURE_ID(aa32_arm_div
, ARM_HWCAP_ARM_IDIVA
);
442 GET_FEATURE_ID(aa32_thumb_div
, ARM_HWCAP_ARM_IDIVT
);
443 GET_FEATURE_ID(aa32_vfp
, ARM_HWCAP_ARM_VFP
);
445 if (cpu_isar_feature(aa32_fpsp_v3
, cpu
) ||
446 cpu_isar_feature(aa32_fpdp_v3
, cpu
)) {
447 hwcaps
|= ARM_HWCAP_ARM_VFPv3
;
448 if (cpu_isar_feature(aa32_simd_r32
, cpu
)) {
449 hwcaps
|= ARM_HWCAP_ARM_VFPD32
;
451 hwcaps
|= ARM_HWCAP_ARM_VFPv3D16
;
454 GET_FEATURE_ID(aa32_simdfmac
, ARM_HWCAP_ARM_VFPv4
);
459 static uint32_t get_elf_hwcap2(void)
461 ARMCPU
*cpu
= ARM_CPU(thread_cpu
);
464 GET_FEATURE_ID(aa32_aes
, ARM_HWCAP2_ARM_AES
);
465 GET_FEATURE_ID(aa32_pmull
, ARM_HWCAP2_ARM_PMULL
);
466 GET_FEATURE_ID(aa32_sha1
, ARM_HWCAP2_ARM_SHA1
);
467 GET_FEATURE_ID(aa32_sha2
, ARM_HWCAP2_ARM_SHA2
);
468 GET_FEATURE_ID(aa32_crc32
, ARM_HWCAP2_ARM_CRC32
);
473 #undef GET_FEATURE_ID
475 #define ELF_PLATFORM get_elf_platform()
477 static const char *get_elf_platform(void)
479 CPUARMState
*env
= thread_cpu
->env_ptr
;
481 #ifdef TARGET_WORDS_BIGENDIAN
487 if (arm_feature(env
, ARM_FEATURE_V8
)) {
489 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
490 if (arm_feature(env
, ARM_FEATURE_M
)) {
495 } else if (arm_feature(env
, ARM_FEATURE_V6
)) {
497 } else if (arm_feature(env
, ARM_FEATURE_V5
)) {
507 /* 64 bit ARM definitions */
508 #define ELF_START_MMAP 0x80000000
510 #define ELF_ARCH EM_AARCH64
511 #define ELF_CLASS ELFCLASS64
512 #ifdef TARGET_WORDS_BIGENDIAN
513 # define ELF_PLATFORM "aarch64_be"
515 # define ELF_PLATFORM "aarch64"
518 static inline void init_thread(struct target_pt_regs
*regs
,
519 struct image_info
*infop
)
521 abi_long stack
= infop
->start_stack
;
522 memset(regs
, 0, sizeof(*regs
));
524 regs
->pc
= infop
->entry
& ~0x3ULL
;
529 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
531 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
532 const CPUARMState
*env
)
536 for (i
= 0; i
< 32; i
++) {
537 (*regs
)[i
] = tswapreg(env
->xregs
[i
]);
539 (*regs
)[32] = tswapreg(env
->pc
);
540 (*regs
)[33] = tswapreg(pstate_read((CPUARMState
*)env
));
543 #define USE_ELF_CORE_DUMP
544 #define ELF_EXEC_PAGESIZE 4096
547 ARM_HWCAP_A64_FP
= 1 << 0,
548 ARM_HWCAP_A64_ASIMD
= 1 << 1,
549 ARM_HWCAP_A64_EVTSTRM
= 1 << 2,
550 ARM_HWCAP_A64_AES
= 1 << 3,
551 ARM_HWCAP_A64_PMULL
= 1 << 4,
552 ARM_HWCAP_A64_SHA1
= 1 << 5,
553 ARM_HWCAP_A64_SHA2
= 1 << 6,
554 ARM_HWCAP_A64_CRC32
= 1 << 7,
555 ARM_HWCAP_A64_ATOMICS
= 1 << 8,
556 ARM_HWCAP_A64_FPHP
= 1 << 9,
557 ARM_HWCAP_A64_ASIMDHP
= 1 << 10,
558 ARM_HWCAP_A64_CPUID
= 1 << 11,
559 ARM_HWCAP_A64_ASIMDRDM
= 1 << 12,
560 ARM_HWCAP_A64_JSCVT
= 1 << 13,
561 ARM_HWCAP_A64_FCMA
= 1 << 14,
562 ARM_HWCAP_A64_LRCPC
= 1 << 15,
563 ARM_HWCAP_A64_DCPOP
= 1 << 16,
564 ARM_HWCAP_A64_SHA3
= 1 << 17,
565 ARM_HWCAP_A64_SM3
= 1 << 18,
566 ARM_HWCAP_A64_SM4
= 1 << 19,
567 ARM_HWCAP_A64_ASIMDDP
= 1 << 20,
568 ARM_HWCAP_A64_SHA512
= 1 << 21,
569 ARM_HWCAP_A64_SVE
= 1 << 22,
570 ARM_HWCAP_A64_ASIMDFHM
= 1 << 23,
571 ARM_HWCAP_A64_DIT
= 1 << 24,
572 ARM_HWCAP_A64_USCAT
= 1 << 25,
573 ARM_HWCAP_A64_ILRCPC
= 1 << 26,
574 ARM_HWCAP_A64_FLAGM
= 1 << 27,
575 ARM_HWCAP_A64_SSBS
= 1 << 28,
576 ARM_HWCAP_A64_SB
= 1 << 29,
577 ARM_HWCAP_A64_PACA
= 1 << 30,
578 ARM_HWCAP_A64_PACG
= 1UL << 31,
580 ARM_HWCAP2_A64_DCPODP
= 1 << 0,
581 ARM_HWCAP2_A64_SVE2
= 1 << 1,
582 ARM_HWCAP2_A64_SVEAES
= 1 << 2,
583 ARM_HWCAP2_A64_SVEPMULL
= 1 << 3,
584 ARM_HWCAP2_A64_SVEBITPERM
= 1 << 4,
585 ARM_HWCAP2_A64_SVESHA3
= 1 << 5,
586 ARM_HWCAP2_A64_SVESM4
= 1 << 6,
587 ARM_HWCAP2_A64_FLAGM2
= 1 << 7,
588 ARM_HWCAP2_A64_FRINT
= 1 << 8,
589 ARM_HWCAP2_A64_SVEI8MM
= 1 << 9,
590 ARM_HWCAP2_A64_SVEF32MM
= 1 << 10,
591 ARM_HWCAP2_A64_SVEF64MM
= 1 << 11,
592 ARM_HWCAP2_A64_SVEBF16
= 1 << 12,
593 ARM_HWCAP2_A64_I8MM
= 1 << 13,
594 ARM_HWCAP2_A64_BF16
= 1 << 14,
595 ARM_HWCAP2_A64_DGH
= 1 << 15,
596 ARM_HWCAP2_A64_RNG
= 1 << 16,
597 ARM_HWCAP2_A64_BTI
= 1 << 17,
598 ARM_HWCAP2_A64_MTE
= 1 << 18,
601 #define ELF_HWCAP get_elf_hwcap()
602 #define ELF_HWCAP2 get_elf_hwcap2()
604 #define GET_FEATURE_ID(feat, hwcap) \
605 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
607 static uint32_t get_elf_hwcap(void)
609 ARMCPU
*cpu
= ARM_CPU(thread_cpu
);
612 hwcaps
|= ARM_HWCAP_A64_FP
;
613 hwcaps
|= ARM_HWCAP_A64_ASIMD
;
614 hwcaps
|= ARM_HWCAP_A64_CPUID
;
616 /* probe for the extra features */
618 GET_FEATURE_ID(aa64_aes
, ARM_HWCAP_A64_AES
);
619 GET_FEATURE_ID(aa64_pmull
, ARM_HWCAP_A64_PMULL
);
620 GET_FEATURE_ID(aa64_sha1
, ARM_HWCAP_A64_SHA1
);
621 GET_FEATURE_ID(aa64_sha256
, ARM_HWCAP_A64_SHA2
);
622 GET_FEATURE_ID(aa64_sha512
, ARM_HWCAP_A64_SHA512
);
623 GET_FEATURE_ID(aa64_crc32
, ARM_HWCAP_A64_CRC32
);
624 GET_FEATURE_ID(aa64_sha3
, ARM_HWCAP_A64_SHA3
);
625 GET_FEATURE_ID(aa64_sm3
, ARM_HWCAP_A64_SM3
);
626 GET_FEATURE_ID(aa64_sm4
, ARM_HWCAP_A64_SM4
);
627 GET_FEATURE_ID(aa64_fp16
, ARM_HWCAP_A64_FPHP
| ARM_HWCAP_A64_ASIMDHP
);
628 GET_FEATURE_ID(aa64_atomics
, ARM_HWCAP_A64_ATOMICS
);
629 GET_FEATURE_ID(aa64_rdm
, ARM_HWCAP_A64_ASIMDRDM
);
630 GET_FEATURE_ID(aa64_dp
, ARM_HWCAP_A64_ASIMDDP
);
631 GET_FEATURE_ID(aa64_fcma
, ARM_HWCAP_A64_FCMA
);
632 GET_FEATURE_ID(aa64_sve
, ARM_HWCAP_A64_SVE
);
633 GET_FEATURE_ID(aa64_pauth
, ARM_HWCAP_A64_PACA
| ARM_HWCAP_A64_PACG
);
634 GET_FEATURE_ID(aa64_fhm
, ARM_HWCAP_A64_ASIMDFHM
);
635 GET_FEATURE_ID(aa64_jscvt
, ARM_HWCAP_A64_JSCVT
);
636 GET_FEATURE_ID(aa64_sb
, ARM_HWCAP_A64_SB
);
637 GET_FEATURE_ID(aa64_condm_4
, ARM_HWCAP_A64_FLAGM
);
638 GET_FEATURE_ID(aa64_dcpop
, ARM_HWCAP_A64_DCPOP
);
639 GET_FEATURE_ID(aa64_rcpc_8_3
, ARM_HWCAP_A64_LRCPC
);
640 GET_FEATURE_ID(aa64_rcpc_8_4
, ARM_HWCAP_A64_ILRCPC
);
645 static uint32_t get_elf_hwcap2(void)
647 ARMCPU
*cpu
= ARM_CPU(thread_cpu
);
650 GET_FEATURE_ID(aa64_dcpodp
, ARM_HWCAP2_A64_DCPODP
);
651 GET_FEATURE_ID(aa64_sve2
, ARM_HWCAP2_A64_SVE2
);
652 GET_FEATURE_ID(aa64_sve2_aes
, ARM_HWCAP2_A64_SVEAES
);
653 GET_FEATURE_ID(aa64_sve2_pmull128
, ARM_HWCAP2_A64_SVEPMULL
);
654 GET_FEATURE_ID(aa64_sve2_bitperm
, ARM_HWCAP2_A64_SVEBITPERM
);
655 GET_FEATURE_ID(aa64_sve2_sha3
, ARM_HWCAP2_A64_SVESHA3
);
656 GET_FEATURE_ID(aa64_sve2_sm4
, ARM_HWCAP2_A64_SVESM4
);
657 GET_FEATURE_ID(aa64_condm_5
, ARM_HWCAP2_A64_FLAGM2
);
658 GET_FEATURE_ID(aa64_frint
, ARM_HWCAP2_A64_FRINT
);
659 GET_FEATURE_ID(aa64_sve_i8mm
, ARM_HWCAP2_A64_SVEI8MM
);
660 GET_FEATURE_ID(aa64_sve_f32mm
, ARM_HWCAP2_A64_SVEF32MM
);
661 GET_FEATURE_ID(aa64_sve_f64mm
, ARM_HWCAP2_A64_SVEF64MM
);
662 GET_FEATURE_ID(aa64_sve_bf16
, ARM_HWCAP2_A64_SVEBF16
);
663 GET_FEATURE_ID(aa64_i8mm
, ARM_HWCAP2_A64_I8MM
);
664 GET_FEATURE_ID(aa64_bf16
, ARM_HWCAP2_A64_BF16
);
665 GET_FEATURE_ID(aa64_rndr
, ARM_HWCAP2_A64_RNG
);
666 GET_FEATURE_ID(aa64_bti
, ARM_HWCAP2_A64_BTI
);
667 GET_FEATURE_ID(aa64_mte
, ARM_HWCAP2_A64_MTE
);
672 #undef GET_FEATURE_ID
674 #endif /* not TARGET_AARCH64 */
675 #endif /* TARGET_ARM */
678 #ifdef TARGET_SPARC64
680 #define ELF_START_MMAP 0x80000000
681 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
682 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
684 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
686 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
689 #define ELF_CLASS ELFCLASS64
690 #define ELF_ARCH EM_SPARCV9
692 #define ELF_START_MMAP 0x80000000
693 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
694 | HWCAP_SPARC_MULDIV)
695 #define ELF_CLASS ELFCLASS32
696 #define ELF_ARCH EM_SPARC
697 #endif /* TARGET_SPARC64 */
699 static inline void init_thread(struct target_pt_regs
*regs
,
700 struct image_info
*infop
)
702 /* Note that target_cpu_copy_regs does not read psr/tstate. */
703 regs
->pc
= infop
->entry
;
704 regs
->npc
= regs
->pc
+ 4;
706 regs
->u_regs
[14] = (infop
->start_stack
- 16 * sizeof(abi_ulong
)
707 - TARGET_STACK_BIAS
);
709 #endif /* TARGET_SPARC */
713 #define ELF_MACHINE PPC_ELF_MACHINE
714 #define ELF_START_MMAP 0x80000000
716 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
718 #define elf_check_arch(x) ( (x) == EM_PPC64 )
720 #define ELF_CLASS ELFCLASS64
724 #define ELF_CLASS ELFCLASS32
728 #define ELF_ARCH EM_PPC
730 /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
731 See arch/powerpc/include/asm/cputable.h. */
733 QEMU_PPC_FEATURE_32
= 0x80000000,
734 QEMU_PPC_FEATURE_64
= 0x40000000,
735 QEMU_PPC_FEATURE_601_INSTR
= 0x20000000,
736 QEMU_PPC_FEATURE_HAS_ALTIVEC
= 0x10000000,
737 QEMU_PPC_FEATURE_HAS_FPU
= 0x08000000,
738 QEMU_PPC_FEATURE_HAS_MMU
= 0x04000000,
739 QEMU_PPC_FEATURE_HAS_4xxMAC
= 0x02000000,
740 QEMU_PPC_FEATURE_UNIFIED_CACHE
= 0x01000000,
741 QEMU_PPC_FEATURE_HAS_SPE
= 0x00800000,
742 QEMU_PPC_FEATURE_HAS_EFP_SINGLE
= 0x00400000,
743 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE
= 0x00200000,
744 QEMU_PPC_FEATURE_NO_TB
= 0x00100000,
745 QEMU_PPC_FEATURE_POWER4
= 0x00080000,
746 QEMU_PPC_FEATURE_POWER5
= 0x00040000,
747 QEMU_PPC_FEATURE_POWER5_PLUS
= 0x00020000,
748 QEMU_PPC_FEATURE_CELL
= 0x00010000,
749 QEMU_PPC_FEATURE_BOOKE
= 0x00008000,
750 QEMU_PPC_FEATURE_SMT
= 0x00004000,
751 QEMU_PPC_FEATURE_ICACHE_SNOOP
= 0x00002000,
752 QEMU_PPC_FEATURE_ARCH_2_05
= 0x00001000,
753 QEMU_PPC_FEATURE_PA6T
= 0x00000800,
754 QEMU_PPC_FEATURE_HAS_DFP
= 0x00000400,
755 QEMU_PPC_FEATURE_POWER6_EXT
= 0x00000200,
756 QEMU_PPC_FEATURE_ARCH_2_06
= 0x00000100,
757 QEMU_PPC_FEATURE_HAS_VSX
= 0x00000080,
758 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT
= 0x00000040,
760 QEMU_PPC_FEATURE_TRUE_LE
= 0x00000002,
761 QEMU_PPC_FEATURE_PPC_LE
= 0x00000001,
763 /* Feature definitions in AT_HWCAP2. */
764 QEMU_PPC_FEATURE2_ARCH_2_07
= 0x80000000, /* ISA 2.07 */
765 QEMU_PPC_FEATURE2_HAS_HTM
= 0x40000000, /* Hardware Transactional Memory */
766 QEMU_PPC_FEATURE2_HAS_DSCR
= 0x20000000, /* Data Stream Control Register */
767 QEMU_PPC_FEATURE2_HAS_EBB
= 0x10000000, /* Event Base Branching */
768 QEMU_PPC_FEATURE2_HAS_ISEL
= 0x08000000, /* Integer Select */
769 QEMU_PPC_FEATURE2_HAS_TAR
= 0x04000000, /* Target Address Register */
770 QEMU_PPC_FEATURE2_VEC_CRYPTO
= 0x02000000,
771 QEMU_PPC_FEATURE2_HTM_NOSC
= 0x01000000,
772 QEMU_PPC_FEATURE2_ARCH_3_00
= 0x00800000, /* ISA 3.00 */
773 QEMU_PPC_FEATURE2_HAS_IEEE128
= 0x00400000, /* VSX IEEE Bin Float 128-bit */
774 QEMU_PPC_FEATURE2_DARN
= 0x00200000, /* darn random number insn */
775 QEMU_PPC_FEATURE2_SCV
= 0x00100000, /* scv syscall */
776 QEMU_PPC_FEATURE2_HTM_NO_SUSPEND
= 0x00080000, /* TM w/o suspended state */
779 #define ELF_HWCAP get_elf_hwcap()
781 static uint32_t get_elf_hwcap(void)
783 PowerPCCPU
*cpu
= POWERPC_CPU(thread_cpu
);
784 uint32_t features
= 0;
786 /* We don't have to be terribly complete here; the high points are
787 Altivec/FP/SPE support. Anything else is just a bonus. */
788 #define GET_FEATURE(flag, feature) \
789 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
790 #define GET_FEATURE2(flags, feature) \
792 if ((cpu->env.insns_flags2 & flags) == flags) { \
793 features |= feature; \
796 GET_FEATURE(PPC_64B
, QEMU_PPC_FEATURE_64
);
797 GET_FEATURE(PPC_FLOAT
, QEMU_PPC_FEATURE_HAS_FPU
);
798 GET_FEATURE(PPC_ALTIVEC
, QEMU_PPC_FEATURE_HAS_ALTIVEC
);
799 GET_FEATURE(PPC_SPE
, QEMU_PPC_FEATURE_HAS_SPE
);
800 GET_FEATURE(PPC_SPE_SINGLE
, QEMU_PPC_FEATURE_HAS_EFP_SINGLE
);
801 GET_FEATURE(PPC_SPE_DOUBLE
, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE
);
802 GET_FEATURE(PPC_BOOKE
, QEMU_PPC_FEATURE_BOOKE
);
803 GET_FEATURE(PPC_405_MAC
, QEMU_PPC_FEATURE_HAS_4xxMAC
);
804 GET_FEATURE2(PPC2_DFP
, QEMU_PPC_FEATURE_HAS_DFP
);
805 GET_FEATURE2(PPC2_VSX
, QEMU_PPC_FEATURE_HAS_VSX
);
806 GET_FEATURE2((PPC2_PERM_ISA206
| PPC2_DIVE_ISA206
| PPC2_ATOMIC_ISA206
|
807 PPC2_FP_CVT_ISA206
| PPC2_FP_TST_ISA206
),
808 QEMU_PPC_FEATURE_ARCH_2_06
);
815 #define ELF_HWCAP2 get_elf_hwcap2()
817 static uint32_t get_elf_hwcap2(void)
819 PowerPCCPU
*cpu
= POWERPC_CPU(thread_cpu
);
820 uint32_t features
= 0;
822 #define GET_FEATURE(flag, feature) \
823 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
824 #define GET_FEATURE2(flag, feature) \
825 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
827 GET_FEATURE(PPC_ISEL
, QEMU_PPC_FEATURE2_HAS_ISEL
);
828 GET_FEATURE2(PPC2_BCTAR_ISA207
, QEMU_PPC_FEATURE2_HAS_TAR
);
829 GET_FEATURE2((PPC2_BCTAR_ISA207
| PPC2_LSQ_ISA207
| PPC2_ALTIVEC_207
|
830 PPC2_ISA207S
), QEMU_PPC_FEATURE2_ARCH_2_07
|
831 QEMU_PPC_FEATURE2_VEC_CRYPTO
);
832 GET_FEATURE2(PPC2_ISA300
, QEMU_PPC_FEATURE2_ARCH_3_00
|
833 QEMU_PPC_FEATURE2_DARN
| QEMU_PPC_FEATURE2_HAS_IEEE128
);
842 * The requirements here are:
843 * - keep the final alignment of sp (sp & 0xf)
844 * - make sure the 32-bit value at the first 16 byte aligned position of
845 * AUXV is greater than 16 for glibc compatibility.
846 * AT_IGNOREPPC is used for that.
847 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
848 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
850 #define DLINFO_ARCH_ITEMS 5
851 #define ARCH_DLINFO \
853 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
855 * Handle glibc compatibility: these magic entries must \
856 * be at the lowest addresses in the final auxv. \
858 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
859 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
860 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
861 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
862 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
865 static inline void init_thread(struct target_pt_regs
*_regs
, struct image_info
*infop
)
867 _regs
->gpr
[1] = infop
->start_stack
;
868 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
869 if (get_ppc64_abi(infop
) < 2) {
871 get_user_u64(val
, infop
->entry
+ 8);
872 _regs
->gpr
[2] = val
+ infop
->load_bias
;
873 get_user_u64(val
, infop
->entry
);
874 infop
->entry
= val
+ infop
->load_bias
;
876 _regs
->gpr
[12] = infop
->entry
; /* r12 set to global entry address */
879 _regs
->nip
= infop
->entry
;
882 /* See linux kernel: arch/powerpc/include/asm/elf.h. */
884 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
886 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUPPCState
*env
)
889 target_ulong ccr
= 0;
891 for (i
= 0; i
< ARRAY_SIZE(env
->gpr
); i
++) {
892 (*regs
)[i
] = tswapreg(env
->gpr
[i
]);
895 (*regs
)[32] = tswapreg(env
->nip
);
896 (*regs
)[33] = tswapreg(env
->msr
);
897 (*regs
)[35] = tswapreg(env
->ctr
);
898 (*regs
)[36] = tswapreg(env
->lr
);
899 (*regs
)[37] = tswapreg(env
->xer
);
901 for (i
= 0; i
< ARRAY_SIZE(env
->crf
); i
++) {
902 ccr
|= env
->crf
[i
] << (32 - ((i
+ 1) * 4));
904 (*regs
)[38] = tswapreg(ccr
);
907 #define USE_ELF_CORE_DUMP
908 #define ELF_EXEC_PAGESIZE 4096
914 #define ELF_START_MMAP 0x80000000
917 #define ELF_CLASS ELFCLASS64
919 #define ELF_CLASS ELFCLASS32
921 #define ELF_ARCH EM_MIPS
923 #define elf_check_arch(x) ((x) == EM_MIPS || (x) == EM_NANOMIPS)
925 #ifdef TARGET_ABI_MIPSN32
926 #define elf_check_abi(x) ((x) & EF_MIPS_ABI2)
928 #define elf_check_abi(x) (!((x) & EF_MIPS_ABI2))
931 static inline void init_thread(struct target_pt_regs
*regs
,
932 struct image_info
*infop
)
934 regs
->cp0_status
= 2 << CP0St_KSU
;
935 regs
->cp0_epc
= infop
->entry
;
936 regs
->regs
[29] = infop
->start_stack
;
939 /* See linux kernel: arch/mips/include/asm/elf.h. */
941 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
943 /* See linux kernel: arch/mips/include/asm/reg.h. */
950 TARGET_EF_R26
= TARGET_EF_R0
+ 26,
951 TARGET_EF_R27
= TARGET_EF_R0
+ 27,
952 TARGET_EF_LO
= TARGET_EF_R0
+ 32,
953 TARGET_EF_HI
= TARGET_EF_R0
+ 33,
954 TARGET_EF_CP0_EPC
= TARGET_EF_R0
+ 34,
955 TARGET_EF_CP0_BADVADDR
= TARGET_EF_R0
+ 35,
956 TARGET_EF_CP0_STATUS
= TARGET_EF_R0
+ 36,
957 TARGET_EF_CP0_CAUSE
= TARGET_EF_R0
+ 37
960 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
961 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUMIPSState
*env
)
965 for (i
= 0; i
< TARGET_EF_R0
; i
++) {
968 (*regs
)[TARGET_EF_R0
] = 0;
970 for (i
= 1; i
< ARRAY_SIZE(env
->active_tc
.gpr
); i
++) {
971 (*regs
)[TARGET_EF_R0
+ i
] = tswapreg(env
->active_tc
.gpr
[i
]);
974 (*regs
)[TARGET_EF_R26
] = 0;
975 (*regs
)[TARGET_EF_R27
] = 0;
976 (*regs
)[TARGET_EF_LO
] = tswapreg(env
->active_tc
.LO
[0]);
977 (*regs
)[TARGET_EF_HI
] = tswapreg(env
->active_tc
.HI
[0]);
978 (*regs
)[TARGET_EF_CP0_EPC
] = tswapreg(env
->active_tc
.PC
);
979 (*regs
)[TARGET_EF_CP0_BADVADDR
] = tswapreg(env
->CP0_BadVAddr
);
980 (*regs
)[TARGET_EF_CP0_STATUS
] = tswapreg(env
->CP0_Status
);
981 (*regs
)[TARGET_EF_CP0_CAUSE
] = tswapreg(env
->CP0_Cause
);
984 #define USE_ELF_CORE_DUMP
985 #define ELF_EXEC_PAGESIZE 4096
987 /* See arch/mips/include/uapi/asm/hwcap.h. */
989 HWCAP_MIPS_R6
= (1 << 0),
990 HWCAP_MIPS_MSA
= (1 << 1),
991 HWCAP_MIPS_CRC32
= (1 << 2),
992 HWCAP_MIPS_MIPS16
= (1 << 3),
993 HWCAP_MIPS_MDMX
= (1 << 4),
994 HWCAP_MIPS_MIPS3D
= (1 << 5),
995 HWCAP_MIPS_SMARTMIPS
= (1 << 6),
996 HWCAP_MIPS_DSP
= (1 << 7),
997 HWCAP_MIPS_DSP2
= (1 << 8),
998 HWCAP_MIPS_DSP3
= (1 << 9),
999 HWCAP_MIPS_MIPS16E2
= (1 << 10),
1000 HWCAP_LOONGSON_MMI
= (1 << 11),
1001 HWCAP_LOONGSON_EXT
= (1 << 12),
1002 HWCAP_LOONGSON_EXT2
= (1 << 13),
1003 HWCAP_LOONGSON_CPUCFG
= (1 << 14),
1006 #define ELF_HWCAP get_elf_hwcap()
1008 #define GET_FEATURE_INSN(_flag, _hwcap) \
1009 do { if (cpu->env.insn_flags & (_flag)) { hwcaps |= _hwcap; } } while (0)
1011 #define GET_FEATURE_REG_SET(_reg, _mask, _hwcap) \
1012 do { if (cpu->env._reg & (_mask)) { hwcaps |= _hwcap; } } while (0)
1014 #define GET_FEATURE_REG_EQU(_reg, _start, _length, _val, _hwcap) \
1016 if (extract32(cpu->env._reg, (_start), (_length)) == (_val)) { \
1021 static uint32_t get_elf_hwcap(void)
1023 MIPSCPU
*cpu
= MIPS_CPU(thread_cpu
);
1024 uint32_t hwcaps
= 0;
1026 GET_FEATURE_REG_EQU(CP0_Config0
, CP0C0_AR
, CP0C0_AR_LENGTH
,
1028 GET_FEATURE_REG_SET(CP0_Config3
, 1 << CP0C3_MSAP
, HWCAP_MIPS_MSA
);
1029 GET_FEATURE_INSN(ASE_LMMI
, HWCAP_LOONGSON_MMI
);
1030 GET_FEATURE_INSN(ASE_LEXT
, HWCAP_LOONGSON_EXT
);
1035 #undef GET_FEATURE_REG_EQU
1036 #undef GET_FEATURE_REG_SET
1037 #undef GET_FEATURE_INSN
1039 #endif /* TARGET_MIPS */
1041 #ifdef TARGET_MICROBLAZE
1043 #define ELF_START_MMAP 0x80000000
1045 #define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
1047 #define ELF_CLASS ELFCLASS32
1048 #define ELF_ARCH EM_MICROBLAZE
1050 static inline void init_thread(struct target_pt_regs
*regs
,
1051 struct image_info
*infop
)
1053 regs
->pc
= infop
->entry
;
1054 regs
->r1
= infop
->start_stack
;
1058 #define ELF_EXEC_PAGESIZE 4096
1060 #define USE_ELF_CORE_DUMP
1062 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1064 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1065 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUMBState
*env
)
1069 for (i
= 0; i
< 32; i
++) {
1070 (*regs
)[pos
++] = tswapreg(env
->regs
[i
]);
1073 (*regs
)[pos
++] = tswapreg(env
->pc
);
1074 (*regs
)[pos
++] = tswapreg(mb_cpu_read_msr(env
));
1076 (*regs
)[pos
++] = tswapreg(env
->ear
);
1078 (*regs
)[pos
++] = tswapreg(env
->esr
);
1081 #endif /* TARGET_MICROBLAZE */
1085 #define ELF_START_MMAP 0x80000000
1087 #define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
1089 #define ELF_CLASS ELFCLASS32
1090 #define ELF_ARCH EM_ALTERA_NIOS2
1092 static void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
1094 regs
->ea
= infop
->entry
;
1095 regs
->sp
= infop
->start_stack
;
1096 regs
->estatus
= 0x3;
1099 #define ELF_EXEC_PAGESIZE 4096
1101 #define USE_ELF_CORE_DUMP
1103 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1105 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1106 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1107 const CPUNios2State
*env
)
1112 for (i
= 1; i
< 8; i
++) /* r0-r7 */
1113 (*regs
)[i
] = tswapreg(env
->regs
[i
+ 7]);
1115 for (i
= 8; i
< 16; i
++) /* r8-r15 */
1116 (*regs
)[i
] = tswapreg(env
->regs
[i
- 8]);
1118 for (i
= 16; i
< 24; i
++) /* r16-r23 */
1119 (*regs
)[i
] = tswapreg(env
->regs
[i
+ 7]);
1120 (*regs
)[24] = -1; /* R_ET */
1121 (*regs
)[25] = -1; /* R_BT */
1122 (*regs
)[26] = tswapreg(env
->regs
[R_GP
]);
1123 (*regs
)[27] = tswapreg(env
->regs
[R_SP
]);
1124 (*regs
)[28] = tswapreg(env
->regs
[R_FP
]);
1125 (*regs
)[29] = tswapreg(env
->regs
[R_EA
]);
1126 (*regs
)[30] = -1; /* R_SSTATUS */
1127 (*regs
)[31] = tswapreg(env
->regs
[R_RA
]);
1129 (*regs
)[32] = tswapreg(env
->regs
[R_PC
]);
1131 (*regs
)[33] = -1; /* R_STATUS */
1132 (*regs
)[34] = tswapreg(env
->regs
[CR_ESTATUS
]);
1134 for (i
= 35; i
< 49; i
++) /* ... */
1138 #endif /* TARGET_NIOS2 */
1140 #ifdef TARGET_OPENRISC
1142 #define ELF_START_MMAP 0x08000000
1144 #define ELF_ARCH EM_OPENRISC
1145 #define ELF_CLASS ELFCLASS32
1146 #define ELF_DATA ELFDATA2MSB
1148 static inline void init_thread(struct target_pt_regs
*regs
,
1149 struct image_info
*infop
)
1151 regs
->pc
= infop
->entry
;
1152 regs
->gpr
[1] = infop
->start_stack
;
1155 #define USE_ELF_CORE_DUMP
1156 #define ELF_EXEC_PAGESIZE 8192
1158 /* See linux kernel arch/openrisc/include/asm/elf.h. */
1159 #define ELF_NREG 34 /* gprs and pc, sr */
1160 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1162 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1163 const CPUOpenRISCState
*env
)
1167 for (i
= 0; i
< 32; i
++) {
1168 (*regs
)[i
] = tswapreg(cpu_get_gpr(env
, i
));
1170 (*regs
)[32] = tswapreg(env
->pc
);
1171 (*regs
)[33] = tswapreg(cpu_get_sr(env
));
1174 #define ELF_PLATFORM NULL
1176 #endif /* TARGET_OPENRISC */
1180 #define ELF_START_MMAP 0x80000000
1182 #define ELF_CLASS ELFCLASS32
1183 #define ELF_ARCH EM_SH
1185 static inline void init_thread(struct target_pt_regs
*regs
,
1186 struct image_info
*infop
)
1188 /* Check other registers XXXXX */
1189 regs
->pc
= infop
->entry
;
1190 regs
->regs
[15] = infop
->start_stack
;
1193 /* See linux kernel: arch/sh/include/asm/elf.h. */
1195 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1197 /* See linux kernel: arch/sh/include/asm/ptrace.h. */
1202 TARGET_REG_GBR
= 19,
1203 TARGET_REG_MACH
= 20,
1204 TARGET_REG_MACL
= 21,
1205 TARGET_REG_SYSCALL
= 22
1208 static inline void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1209 const CPUSH4State
*env
)
1213 for (i
= 0; i
< 16; i
++) {
1214 (*regs
)[i
] = tswapreg(env
->gregs
[i
]);
1217 (*regs
)[TARGET_REG_PC
] = tswapreg(env
->pc
);
1218 (*regs
)[TARGET_REG_PR
] = tswapreg(env
->pr
);
1219 (*regs
)[TARGET_REG_SR
] = tswapreg(env
->sr
);
1220 (*regs
)[TARGET_REG_GBR
] = tswapreg(env
->gbr
);
1221 (*regs
)[TARGET_REG_MACH
] = tswapreg(env
->mach
);
1222 (*regs
)[TARGET_REG_MACL
] = tswapreg(env
->macl
);
1223 (*regs
)[TARGET_REG_SYSCALL
] = 0; /* FIXME */
1226 #define USE_ELF_CORE_DUMP
1227 #define ELF_EXEC_PAGESIZE 4096
1230 SH_CPU_HAS_FPU
= 0x0001, /* Hardware FPU support */
1231 SH_CPU_HAS_P2_FLUSH_BUG
= 0x0002, /* Need to flush the cache in P2 area */
1232 SH_CPU_HAS_MMU_PAGE_ASSOC
= 0x0004, /* SH3: TLB way selection bit support */
1233 SH_CPU_HAS_DSP
= 0x0008, /* SH-DSP: DSP support */
1234 SH_CPU_HAS_PERF_COUNTER
= 0x0010, /* Hardware performance counters */
1235 SH_CPU_HAS_PTEA
= 0x0020, /* PTEA register */
1236 SH_CPU_HAS_LLSC
= 0x0040, /* movli.l/movco.l */
1237 SH_CPU_HAS_L2_CACHE
= 0x0080, /* Secondary cache / URAM */
1238 SH_CPU_HAS_OP32
= 0x0100, /* 32-bit instruction support */
1239 SH_CPU_HAS_PTEAEX
= 0x0200, /* PTE ASID Extension support */
1242 #define ELF_HWCAP get_elf_hwcap()
1244 static uint32_t get_elf_hwcap(void)
1246 SuperHCPU
*cpu
= SUPERH_CPU(thread_cpu
);
1249 hwcap
|= SH_CPU_HAS_FPU
;
1251 if (cpu
->env
.features
& SH_FEATURE_SH4A
) {
1252 hwcap
|= SH_CPU_HAS_LLSC
;
1262 #define ELF_START_MMAP 0x80000000
1264 #define ELF_CLASS ELFCLASS32
1265 #define ELF_ARCH EM_CRIS
1267 static inline void init_thread(struct target_pt_regs
*regs
,
1268 struct image_info
*infop
)
1270 regs
->erp
= infop
->entry
;
1273 #define ELF_EXEC_PAGESIZE 8192
1279 #define ELF_START_MMAP 0x80000000
1281 #define ELF_CLASS ELFCLASS32
1282 #define ELF_ARCH EM_68K
1284 /* ??? Does this need to do anything?
1285 #define ELF_PLAT_INIT(_r) */
1287 static inline void init_thread(struct target_pt_regs
*regs
,
1288 struct image_info
*infop
)
1290 regs
->usp
= infop
->start_stack
;
1292 regs
->pc
= infop
->entry
;
1295 /* See linux kernel: arch/m68k/include/asm/elf.h. */
1297 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1299 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUM68KState
*env
)
1301 (*regs
)[0] = tswapreg(env
->dregs
[1]);
1302 (*regs
)[1] = tswapreg(env
->dregs
[2]);
1303 (*regs
)[2] = tswapreg(env
->dregs
[3]);
1304 (*regs
)[3] = tswapreg(env
->dregs
[4]);
1305 (*regs
)[4] = tswapreg(env
->dregs
[5]);
1306 (*regs
)[5] = tswapreg(env
->dregs
[6]);
1307 (*regs
)[6] = tswapreg(env
->dregs
[7]);
1308 (*regs
)[7] = tswapreg(env
->aregs
[0]);
1309 (*regs
)[8] = tswapreg(env
->aregs
[1]);
1310 (*regs
)[9] = tswapreg(env
->aregs
[2]);
1311 (*regs
)[10] = tswapreg(env
->aregs
[3]);
1312 (*regs
)[11] = tswapreg(env
->aregs
[4]);
1313 (*regs
)[12] = tswapreg(env
->aregs
[5]);
1314 (*regs
)[13] = tswapreg(env
->aregs
[6]);
1315 (*regs
)[14] = tswapreg(env
->dregs
[0]);
1316 (*regs
)[15] = tswapreg(env
->aregs
[7]);
1317 (*regs
)[16] = tswapreg(env
->dregs
[0]); /* FIXME: orig_d0 */
1318 (*regs
)[17] = tswapreg(env
->sr
);
1319 (*regs
)[18] = tswapreg(env
->pc
);
1320 (*regs
)[19] = 0; /* FIXME: regs->format | regs->vector */
1323 #define USE_ELF_CORE_DUMP
1324 #define ELF_EXEC_PAGESIZE 8192
1330 #define ELF_START_MMAP (0x30000000000ULL)
1332 #define ELF_CLASS ELFCLASS64
1333 #define ELF_ARCH EM_ALPHA
1335 static inline void init_thread(struct target_pt_regs
*regs
,
1336 struct image_info
*infop
)
1338 regs
->pc
= infop
->entry
;
1340 regs
->usp
= infop
->start_stack
;
1343 #define ELF_EXEC_PAGESIZE 8192
1345 #endif /* TARGET_ALPHA */
1349 #define ELF_START_MMAP (0x20000000000ULL)
1351 #define ELF_CLASS ELFCLASS64
1352 #define ELF_DATA ELFDATA2MSB
1353 #define ELF_ARCH EM_S390
1357 #define ELF_HWCAP get_elf_hwcap()
1359 #define GET_FEATURE(_feat, _hwcap) \
1360 do { if (s390_has_feat(_feat)) { hwcap |= _hwcap; } } while (0)
1362 static uint32_t get_elf_hwcap(void)
1365 * Let's assume we always have esan3 and zarch.
1366 * 31-bit processes can use 64-bit registers (high gprs).
1368 uint32_t hwcap
= HWCAP_S390_ESAN3
| HWCAP_S390_ZARCH
| HWCAP_S390_HIGH_GPRS
;
1370 GET_FEATURE(S390_FEAT_STFLE
, HWCAP_S390_STFLE
);
1371 GET_FEATURE(S390_FEAT_MSA
, HWCAP_S390_MSA
);
1372 GET_FEATURE(S390_FEAT_LONG_DISPLACEMENT
, HWCAP_S390_LDISP
);
1373 GET_FEATURE(S390_FEAT_EXTENDED_IMMEDIATE
, HWCAP_S390_EIMM
);
1374 if (s390_has_feat(S390_FEAT_EXTENDED_TRANSLATION_3
) &&
1375 s390_has_feat(S390_FEAT_ETF3_ENH
)) {
1376 hwcap
|= HWCAP_S390_ETF3EH
;
1378 GET_FEATURE(S390_FEAT_VECTOR
, HWCAP_S390_VXRS
);
1379 GET_FEATURE(S390_FEAT_VECTOR_ENH
, HWCAP_S390_VXRS_EXT
);
1384 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
1386 regs
->psw
.addr
= infop
->entry
;
1387 regs
->psw
.mask
= PSW_MASK_64
| PSW_MASK_32
;
1388 regs
->gprs
[15] = infop
->start_stack
;
1391 /* See linux kernel: arch/s390/include/uapi/asm/ptrace.h (s390_regs). */
1393 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1396 TARGET_REG_PSWM
= 0,
1397 TARGET_REG_PSWA
= 1,
1398 TARGET_REG_GPRS
= 2,
1399 TARGET_REG_ARS
= 18,
1400 TARGET_REG_ORIG_R2
= 26,
1403 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1404 const CPUS390XState
*env
)
1409 (*regs
)[TARGET_REG_PSWM
] = tswapreg(env
->psw
.mask
);
1410 (*regs
)[TARGET_REG_PSWA
] = tswapreg(env
->psw
.addr
);
1411 for (i
= 0; i
< 16; i
++) {
1412 (*regs
)[TARGET_REG_GPRS
+ i
] = tswapreg(env
->regs
[i
]);
1414 aregs
= (uint32_t *)&((*regs
)[TARGET_REG_ARS
]);
1415 for (i
= 0; i
< 16; i
++) {
1416 aregs
[i
] = tswap32(env
->aregs
[i
]);
1418 (*regs
)[TARGET_REG_ORIG_R2
] = 0;
1421 #define USE_ELF_CORE_DUMP
1422 #define ELF_EXEC_PAGESIZE 4096
1424 #endif /* TARGET_S390X */
1428 #define ELF_START_MMAP 0x80000000
1429 #define ELF_ARCH EM_RISCV
1431 #ifdef TARGET_RISCV32
1432 #define ELF_CLASS ELFCLASS32
1434 #define ELF_CLASS ELFCLASS64
1437 static inline void init_thread(struct target_pt_regs
*regs
,
1438 struct image_info
*infop
)
1440 regs
->sepc
= infop
->entry
;
1441 regs
->sp
= infop
->start_stack
;
1444 #define ELF_EXEC_PAGESIZE 4096
1446 #endif /* TARGET_RISCV */
1450 #define ELF_START_MMAP 0x80000000
1451 #define ELF_CLASS ELFCLASS32
1452 #define ELF_ARCH EM_PARISC
1453 #define ELF_PLATFORM "PARISC"
1454 #define STACK_GROWS_DOWN 0
1455 #define STACK_ALIGNMENT 64
1457 static inline void init_thread(struct target_pt_regs
*regs
,
1458 struct image_info
*infop
)
1460 regs
->iaoq
[0] = infop
->entry
;
1461 regs
->iaoq
[1] = infop
->entry
+ 4;
1463 regs
->gr
[24] = infop
->arg_start
;
1464 regs
->gr
[25] = (infop
->arg_end
- infop
->arg_start
) / sizeof(abi_ulong
);
1465 /* The top-of-stack contains a linkage buffer. */
1466 regs
->gr
[30] = infop
->start_stack
+ 64;
1467 regs
->gr
[31] = infop
->entry
;
1470 #endif /* TARGET_HPPA */
1472 #ifdef TARGET_XTENSA
1474 #define ELF_START_MMAP 0x20000000
1476 #define ELF_CLASS ELFCLASS32
1477 #define ELF_ARCH EM_XTENSA
1479 static inline void init_thread(struct target_pt_regs
*regs
,
1480 struct image_info
*infop
)
1482 regs
->windowbase
= 0;
1483 regs
->windowstart
= 1;
1484 regs
->areg
[1] = infop
->start_stack
;
1485 regs
->pc
= infop
->entry
;
1488 /* See linux kernel: arch/xtensa/include/asm/elf.h. */
1489 #define ELF_NREG 128
1490 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
1499 TARGET_REG_WINDOWSTART
,
1500 TARGET_REG_WINDOWBASE
,
1501 TARGET_REG_THREADPTR
,
1502 TARGET_REG_AR0
= 64,
1505 static void elf_core_copy_regs(target_elf_gregset_t
*regs
,
1506 const CPUXtensaState
*env
)
1510 (*regs
)[TARGET_REG_PC
] = tswapreg(env
->pc
);
1511 (*regs
)[TARGET_REG_PS
] = tswapreg(env
->sregs
[PS
] & ~PS_EXCM
);
1512 (*regs
)[TARGET_REG_LBEG
] = tswapreg(env
->sregs
[LBEG
]);
1513 (*regs
)[TARGET_REG_LEND
] = tswapreg(env
->sregs
[LEND
]);
1514 (*regs
)[TARGET_REG_LCOUNT
] = tswapreg(env
->sregs
[LCOUNT
]);
1515 (*regs
)[TARGET_REG_SAR
] = tswapreg(env
->sregs
[SAR
]);
1516 (*regs
)[TARGET_REG_WINDOWSTART
] = tswapreg(env
->sregs
[WINDOW_START
]);
1517 (*regs
)[TARGET_REG_WINDOWBASE
] = tswapreg(env
->sregs
[WINDOW_BASE
]);
1518 (*regs
)[TARGET_REG_THREADPTR
] = tswapreg(env
->uregs
[THREADPTR
]);
1519 xtensa_sync_phys_from_window((CPUXtensaState
*)env
);
1520 for (i
= 0; i
< env
->config
->nareg
; ++i
) {
1521 (*regs
)[TARGET_REG_AR0
+ i
] = tswapreg(env
->phys_regs
[i
]);
1525 #define USE_ELF_CORE_DUMP
1526 #define ELF_EXEC_PAGESIZE 4096
1528 #endif /* TARGET_XTENSA */
1530 #ifdef TARGET_HEXAGON
1532 #define ELF_START_MMAP 0x20000000
1534 #define ELF_CLASS ELFCLASS32
1535 #define ELF_ARCH EM_HEXAGON
1537 static inline void init_thread(struct target_pt_regs
*regs
,
1538 struct image_info
*infop
)
1540 regs
->sepc
= infop
->entry
;
1541 regs
->sp
= infop
->start_stack
;
1544 #endif /* TARGET_HEXAGON */
1546 #ifndef ELF_PLATFORM
1547 #define ELF_PLATFORM (NULL)
1551 #define ELF_MACHINE ELF_ARCH
1554 #ifndef elf_check_arch
1555 #define elf_check_arch(x) ((x) == ELF_ARCH)
1558 #ifndef elf_check_abi
1559 #define elf_check_abi(x) (1)
1566 #ifndef STACK_GROWS_DOWN
1567 #define STACK_GROWS_DOWN 1
1570 #ifndef STACK_ALIGNMENT
1571 #define STACK_ALIGNMENT 16
1576 #define ELF_CLASS ELFCLASS32
1578 #define bswaptls(ptr) bswap32s(ptr)
1583 /* We must delay the following stanzas until after "elf.h". */
1584 #if defined(TARGET_AARCH64)
1586 static bool arch_parse_elf_property(uint32_t pr_type
, uint32_t pr_datasz
,
1587 const uint32_t *data
,
1588 struct image_info
*info
,
1591 if (pr_type
== GNU_PROPERTY_AARCH64_FEATURE_1_AND
) {
1592 if (pr_datasz
!= sizeof(uint32_t)) {
1593 error_setg(errp
, "Ill-formed GNU_PROPERTY_AARCH64_FEATURE_1_AND");
1596 /* We will extract GNU_PROPERTY_AARCH64_FEATURE_1_BTI later. */
1597 info
->note_flags
= *data
;
1601 #define ARCH_USE_GNU_PROPERTY 1
1605 static bool arch_parse_elf_property(uint32_t pr_type
, uint32_t pr_datasz
,
1606 const uint32_t *data
,
1607 struct image_info
*info
,
1610 g_assert_not_reached();
1612 #define ARCH_USE_GNU_PROPERTY 0
1618 unsigned int a_info
; /* Use macros N_MAGIC, etc for access */
1619 unsigned int a_text
; /* length of text, in bytes */
1620 unsigned int a_data
; /* length of data, in bytes */
1621 unsigned int a_bss
; /* length of uninitialized data area, in bytes */
1622 unsigned int a_syms
; /* length of symbol table data in file, in bytes */
1623 unsigned int a_entry
; /* start address */
1624 unsigned int a_trsize
; /* length of relocation info for text, in bytes */
1625 unsigned int a_drsize
; /* length of relocation info for data, in bytes */
1629 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
1635 /* Necessary parameters */
1636 #define TARGET_ELF_EXEC_PAGESIZE \
1637 (((eppnt->p_align & ~qemu_host_page_mask) != 0) ? \
1638 TARGET_PAGE_SIZE : MAX(qemu_host_page_size, TARGET_PAGE_SIZE))
1639 #define TARGET_ELF_PAGELENGTH(_v) ROUND_UP((_v), TARGET_ELF_EXEC_PAGESIZE)
1640 #define TARGET_ELF_PAGESTART(_v) ((_v) & \
1641 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
1642 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
1644 #define DLINFO_ITEMS 16
1646 static inline void memcpy_fromfs(void * to
, const void * from
, unsigned long n
)
1648 memcpy(to
, from
, n
);
1652 static void bswap_ehdr(struct elfhdr
*ehdr
)
1654 bswap16s(&ehdr
->e_type
); /* Object file type */
1655 bswap16s(&ehdr
->e_machine
); /* Architecture */
1656 bswap32s(&ehdr
->e_version
); /* Object file version */
1657 bswaptls(&ehdr
->e_entry
); /* Entry point virtual address */
1658 bswaptls(&ehdr
->e_phoff
); /* Program header table file offset */
1659 bswaptls(&ehdr
->e_shoff
); /* Section header table file offset */
1660 bswap32s(&ehdr
->e_flags
); /* Processor-specific flags */
1661 bswap16s(&ehdr
->e_ehsize
); /* ELF header size in bytes */
1662 bswap16s(&ehdr
->e_phentsize
); /* Program header table entry size */
1663 bswap16s(&ehdr
->e_phnum
); /* Program header table entry count */
1664 bswap16s(&ehdr
->e_shentsize
); /* Section header table entry size */
1665 bswap16s(&ehdr
->e_shnum
); /* Section header table entry count */
1666 bswap16s(&ehdr
->e_shstrndx
); /* Section header string table index */
1669 static void bswap_phdr(struct elf_phdr
*phdr
, int phnum
)
1672 for (i
= 0; i
< phnum
; ++i
, ++phdr
) {
1673 bswap32s(&phdr
->p_type
); /* Segment type */
1674 bswap32s(&phdr
->p_flags
); /* Segment flags */
1675 bswaptls(&phdr
->p_offset
); /* Segment file offset */
1676 bswaptls(&phdr
->p_vaddr
); /* Segment virtual address */
1677 bswaptls(&phdr
->p_paddr
); /* Segment physical address */
1678 bswaptls(&phdr
->p_filesz
); /* Segment size in file */
1679 bswaptls(&phdr
->p_memsz
); /* Segment size in memory */
1680 bswaptls(&phdr
->p_align
); /* Segment alignment */
1684 static void bswap_shdr(struct elf_shdr
*shdr
, int shnum
)
1687 for (i
= 0; i
< shnum
; ++i
, ++shdr
) {
1688 bswap32s(&shdr
->sh_name
);
1689 bswap32s(&shdr
->sh_type
);
1690 bswaptls(&shdr
->sh_flags
);
1691 bswaptls(&shdr
->sh_addr
);
1692 bswaptls(&shdr
->sh_offset
);
1693 bswaptls(&shdr
->sh_size
);
1694 bswap32s(&shdr
->sh_link
);
1695 bswap32s(&shdr
->sh_info
);
1696 bswaptls(&shdr
->sh_addralign
);
1697 bswaptls(&shdr
->sh_entsize
);
1701 static void bswap_sym(struct elf_sym
*sym
)
1703 bswap32s(&sym
->st_name
);
1704 bswaptls(&sym
->st_value
);
1705 bswaptls(&sym
->st_size
);
1706 bswap16s(&sym
->st_shndx
);
1710 static void bswap_mips_abiflags(Mips_elf_abiflags_v0
*abiflags
)
1712 bswap16s(&abiflags
->version
);
1713 bswap32s(&abiflags
->ases
);
1714 bswap32s(&abiflags
->isa_ext
);
1715 bswap32s(&abiflags
->flags1
);
1716 bswap32s(&abiflags
->flags2
);
1720 static inline void bswap_ehdr(struct elfhdr
*ehdr
) { }
1721 static inline void bswap_phdr(struct elf_phdr
*phdr
, int phnum
) { }
1722 static inline void bswap_shdr(struct elf_shdr
*shdr
, int shnum
) { }
1723 static inline void bswap_sym(struct elf_sym
*sym
) { }
1725 static inline void bswap_mips_abiflags(Mips_elf_abiflags_v0
*abiflags
) { }
1729 #ifdef USE_ELF_CORE_DUMP
1730 static int elf_core_dump(int, const CPUArchState
*);
1731 #endif /* USE_ELF_CORE_DUMP */
1732 static void load_symbols(struct elfhdr
*hdr
, int fd
, abi_ulong load_bias
);
1734 /* Verify the portions of EHDR within E_IDENT for the target.
1735 This can be performed before bswapping the entire header. */
1736 static bool elf_check_ident(struct elfhdr
*ehdr
)
1738 return (ehdr
->e_ident
[EI_MAG0
] == ELFMAG0
1739 && ehdr
->e_ident
[EI_MAG1
] == ELFMAG1
1740 && ehdr
->e_ident
[EI_MAG2
] == ELFMAG2
1741 && ehdr
->e_ident
[EI_MAG3
] == ELFMAG3
1742 && ehdr
->e_ident
[EI_CLASS
] == ELF_CLASS
1743 && ehdr
->e_ident
[EI_DATA
] == ELF_DATA
1744 && ehdr
->e_ident
[EI_VERSION
] == EV_CURRENT
);
1747 /* Verify the portions of EHDR outside of E_IDENT for the target.
1748 This has to wait until after bswapping the header. */
1749 static bool elf_check_ehdr(struct elfhdr
*ehdr
)
1751 return (elf_check_arch(ehdr
->e_machine
)
1752 && elf_check_abi(ehdr
->e_flags
)
1753 && ehdr
->e_ehsize
== sizeof(struct elfhdr
)
1754 && ehdr
->e_phentsize
== sizeof(struct elf_phdr
)
1755 && (ehdr
->e_type
== ET_EXEC
|| ehdr
->e_type
== ET_DYN
));
1759 * 'copy_elf_strings()' copies argument/envelope strings from user
1760 * memory to free pages in kernel mem. These are in a format ready
1761 * to be put directly into the top of new user memory.
1764 static abi_ulong
copy_elf_strings(int argc
, char **argv
, char *scratch
,
1765 abi_ulong p
, abi_ulong stack_limit
)
1772 return 0; /* bullet-proofing */
1775 if (STACK_GROWS_DOWN
) {
1776 int offset
= ((p
- 1) % TARGET_PAGE_SIZE
) + 1;
1777 for (i
= argc
- 1; i
>= 0; --i
) {
1780 fprintf(stderr
, "VFS: argc is wrong");
1783 len
= strlen(tmp
) + 1;
1786 if (len
> (p
- stack_limit
)) {
1790 int bytes_to_copy
= (len
> offset
) ? offset
: len
;
1791 tmp
-= bytes_to_copy
;
1793 offset
-= bytes_to_copy
;
1794 len
-= bytes_to_copy
;
1796 memcpy_fromfs(scratch
+ offset
, tmp
, bytes_to_copy
);
1799 memcpy_to_target(p
, scratch
, top
- p
);
1801 offset
= TARGET_PAGE_SIZE
;
1806 memcpy_to_target(p
, scratch
+ offset
, top
- p
);
1809 int remaining
= TARGET_PAGE_SIZE
- (p
% TARGET_PAGE_SIZE
);
1810 for (i
= 0; i
< argc
; ++i
) {
1813 fprintf(stderr
, "VFS: argc is wrong");
1816 len
= strlen(tmp
) + 1;
1817 if (len
> (stack_limit
- p
)) {
1821 int bytes_to_copy
= (len
> remaining
) ? remaining
: len
;
1823 memcpy_fromfs(scratch
+ (p
- top
), tmp
, bytes_to_copy
);
1825 tmp
+= bytes_to_copy
;
1826 remaining
-= bytes_to_copy
;
1828 len
-= bytes_to_copy
;
1830 if (remaining
== 0) {
1831 memcpy_to_target(top
, scratch
, p
- top
);
1833 remaining
= TARGET_PAGE_SIZE
;
1838 memcpy_to_target(top
, scratch
, p
- top
);
1845 /* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1846 * argument/environment space. Newer kernels (>2.6.33) allow more,
1847 * dependent on stack size, but guarantee at least 32 pages for
1848 * backwards compatibility.
1850 #define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1852 static abi_ulong
setup_arg_pages(struct linux_binprm
*bprm
,
1853 struct image_info
*info
)
1855 abi_ulong size
, error
, guard
;
1857 size
= guest_stack_size
;
1858 if (size
< STACK_LOWER_LIMIT
) {
1859 size
= STACK_LOWER_LIMIT
;
1861 guard
= TARGET_PAGE_SIZE
;
1862 if (guard
< qemu_real_host_page_size
) {
1863 guard
= qemu_real_host_page_size
;
1866 error
= target_mmap(0, size
+ guard
, PROT_READ
| PROT_WRITE
,
1867 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
1869 perror("mmap stack");
1873 /* We reserve one extra page at the top of the stack as guard. */
1874 if (STACK_GROWS_DOWN
) {
1875 target_mprotect(error
, guard
, PROT_NONE
);
1876 info
->stack_limit
= error
+ guard
;
1877 return info
->stack_limit
+ size
- sizeof(void *);
1879 target_mprotect(error
+ size
, guard
, PROT_NONE
);
1880 info
->stack_limit
= error
+ size
;
1885 /* Map and zero the bss. We need to explicitly zero any fractional pages
1886 after the data section (i.e. bss). */
1887 static void zero_bss(abi_ulong elf_bss
, abi_ulong last_bss
, int prot
)
1889 uintptr_t host_start
, host_map_start
, host_end
;
1891 last_bss
= TARGET_PAGE_ALIGN(last_bss
);
1893 /* ??? There is confusion between qemu_real_host_page_size and
1894 qemu_host_page_size here and elsewhere in target_mmap, which
1895 may lead to the end of the data section mapping from the file
1896 not being mapped. At least there was an explicit test and
1897 comment for that here, suggesting that "the file size must
1898 be known". The comment probably pre-dates the introduction
1899 of the fstat system call in target_mmap which does in fact
1900 find out the size. What isn't clear is if the workaround
1901 here is still actually needed. For now, continue with it,
1902 but merge it with the "normal" mmap that would allocate the bss. */
1904 host_start
= (uintptr_t) g2h_untagged(elf_bss
);
1905 host_end
= (uintptr_t) g2h_untagged(last_bss
);
1906 host_map_start
= REAL_HOST_PAGE_ALIGN(host_start
);
1908 if (host_map_start
< host_end
) {
1909 void *p
= mmap((void *)host_map_start
, host_end
- host_map_start
,
1910 prot
, MAP_FIXED
| MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
1911 if (p
== MAP_FAILED
) {
1912 perror("cannot mmap brk");
1917 /* Ensure that the bss page(s) are valid */
1918 if ((page_get_flags(last_bss
-1) & prot
) != prot
) {
1919 page_set_flags(elf_bss
& TARGET_PAGE_MASK
, last_bss
, prot
| PAGE_VALID
);
1922 if (host_start
< host_map_start
) {
1923 memset((void *)host_start
, 0, host_map_start
- host_start
);
1928 static int elf_is_fdpic(struct elfhdr
*exec
)
1930 return exec
->e_ident
[EI_OSABI
] == ELFOSABI_ARM_FDPIC
;
1933 /* Default implementation, always false. */
1934 static int elf_is_fdpic(struct elfhdr
*exec
)
1940 static abi_ulong
loader_build_fdpic_loadmap(struct image_info
*info
, abi_ulong sp
)
1943 struct elf32_fdpic_loadseg
*loadsegs
= info
->loadsegs
;
1945 /* elf32_fdpic_loadseg */
1949 put_user_u32(loadsegs
[n
].addr
, sp
+0);
1950 put_user_u32(loadsegs
[n
].p_vaddr
, sp
+4);
1951 put_user_u32(loadsegs
[n
].p_memsz
, sp
+8);
1954 /* elf32_fdpic_loadmap */
1956 put_user_u16(0, sp
+0); /* version */
1957 put_user_u16(info
->nsegs
, sp
+2); /* nsegs */
1959 info
->personality
= PER_LINUX_FDPIC
;
1960 info
->loadmap_addr
= sp
;
1965 static abi_ulong
create_elf_tables(abi_ulong p
, int argc
, int envc
,
1966 struct elfhdr
*exec
,
1967 struct image_info
*info
,
1968 struct image_info
*interp_info
)
1971 abi_ulong u_argc
, u_argv
, u_envp
, u_auxv
;
1974 abi_ulong u_rand_bytes
;
1975 uint8_t k_rand_bytes
[16];
1976 abi_ulong u_platform
;
1977 const char *k_platform
;
1978 const int n
= sizeof(elf_addr_t
);
1982 /* Needs to be before we load the env/argc/... */
1983 if (elf_is_fdpic(exec
)) {
1984 /* Need 4 byte alignment for these structs */
1986 sp
= loader_build_fdpic_loadmap(info
, sp
);
1987 info
->other_info
= interp_info
;
1989 interp_info
->other_info
= info
;
1990 sp
= loader_build_fdpic_loadmap(interp_info
, sp
);
1991 info
->interpreter_loadmap_addr
= interp_info
->loadmap_addr
;
1992 info
->interpreter_pt_dynamic_addr
= interp_info
->pt_dynamic_addr
;
1994 info
->interpreter_loadmap_addr
= 0;
1995 info
->interpreter_pt_dynamic_addr
= 0;
2000 k_platform
= ELF_PLATFORM
;
2002 size_t len
= strlen(k_platform
) + 1;
2003 if (STACK_GROWS_DOWN
) {
2004 sp
-= (len
+ n
- 1) & ~(n
- 1);
2006 /* FIXME - check return value of memcpy_to_target() for failure */
2007 memcpy_to_target(sp
, k_platform
, len
);
2009 memcpy_to_target(sp
, k_platform
, len
);
2015 /* Provide 16 byte alignment for the PRNG, and basic alignment for
2016 * the argv and envp pointers.
2018 if (STACK_GROWS_DOWN
) {
2019 sp
= QEMU_ALIGN_DOWN(sp
, 16);
2021 sp
= QEMU_ALIGN_UP(sp
, 16);
2025 * Generate 16 random bytes for userspace PRNG seeding.
2027 qemu_guest_getrandom_nofail(k_rand_bytes
, sizeof(k_rand_bytes
));
2028 if (STACK_GROWS_DOWN
) {
2031 /* FIXME - check return value of memcpy_to_target() for failure */
2032 memcpy_to_target(sp
, k_rand_bytes
, 16);
2034 memcpy_to_target(sp
, k_rand_bytes
, 16);
2039 size
= (DLINFO_ITEMS
+ 1) * 2;
2042 #ifdef DLINFO_ARCH_ITEMS
2043 size
+= DLINFO_ARCH_ITEMS
* 2;
2048 info
->auxv_len
= size
* n
;
2050 size
+= envc
+ argc
+ 2;
2051 size
+= 1; /* argc itself */
2054 /* Allocate space and finalize stack alignment for entry now. */
2055 if (STACK_GROWS_DOWN
) {
2056 u_argc
= QEMU_ALIGN_DOWN(sp
- size
, STACK_ALIGNMENT
);
2060 sp
= QEMU_ALIGN_UP(sp
+ size
, STACK_ALIGNMENT
);
2063 u_argv
= u_argc
+ n
;
2064 u_envp
= u_argv
+ (argc
+ 1) * n
;
2065 u_auxv
= u_envp
+ (envc
+ 1) * n
;
2066 info
->saved_auxv
= u_auxv
;
2067 info
->arg_start
= u_argv
;
2068 info
->arg_end
= u_argv
+ argc
* n
;
2070 /* This is correct because Linux defines
2071 * elf_addr_t as Elf32_Off / Elf64_Off
2073 #define NEW_AUX_ENT(id, val) do { \
2074 put_user_ual(id, u_auxv); u_auxv += n; \
2075 put_user_ual(val, u_auxv); u_auxv += n; \
2080 * ARCH_DLINFO must come first so platform specific code can enforce
2081 * special alignment requirements on the AUXV if necessary (eg. PPC).
2085 /* There must be exactly DLINFO_ITEMS entries here, or the assert
2086 * on info->auxv_len will trigger.
2088 NEW_AUX_ENT(AT_PHDR
, (abi_ulong
)(info
->load_addr
+ exec
->e_phoff
));
2089 NEW_AUX_ENT(AT_PHENT
, (abi_ulong
)(sizeof (struct elf_phdr
)));
2090 NEW_AUX_ENT(AT_PHNUM
, (abi_ulong
)(exec
->e_phnum
));
2091 if ((info
->alignment
& ~qemu_host_page_mask
) != 0) {
2092 /* Target doesn't support host page size alignment */
2093 NEW_AUX_ENT(AT_PAGESZ
, (abi_ulong
)(TARGET_PAGE_SIZE
));
2095 NEW_AUX_ENT(AT_PAGESZ
, (abi_ulong
)(MAX(TARGET_PAGE_SIZE
,
2096 qemu_host_page_size
)));
2098 NEW_AUX_ENT(AT_BASE
, (abi_ulong
)(interp_info
? interp_info
->load_addr
: 0));
2099 NEW_AUX_ENT(AT_FLAGS
, (abi_ulong
)0);
2100 NEW_AUX_ENT(AT_ENTRY
, info
->entry
);
2101 NEW_AUX_ENT(AT_UID
, (abi_ulong
) getuid());
2102 NEW_AUX_ENT(AT_EUID
, (abi_ulong
) geteuid());
2103 NEW_AUX_ENT(AT_GID
, (abi_ulong
) getgid());
2104 NEW_AUX_ENT(AT_EGID
, (abi_ulong
) getegid());
2105 NEW_AUX_ENT(AT_HWCAP
, (abi_ulong
) ELF_HWCAP
);
2106 NEW_AUX_ENT(AT_CLKTCK
, (abi_ulong
) sysconf(_SC_CLK_TCK
));
2107 NEW_AUX_ENT(AT_RANDOM
, (abi_ulong
) u_rand_bytes
);
2108 NEW_AUX_ENT(AT_SECURE
, (abi_ulong
) qemu_getauxval(AT_SECURE
));
2109 NEW_AUX_ENT(AT_EXECFN
, info
->file_string
);
2112 NEW_AUX_ENT(AT_HWCAP2
, (abi_ulong
) ELF_HWCAP2
);
2116 NEW_AUX_ENT(AT_PLATFORM
, u_platform
);
2118 NEW_AUX_ENT (AT_NULL
, 0);
2121 /* Check that our initial calculation of the auxv length matches how much
2122 * we actually put into it.
2124 assert(info
->auxv_len
== u_auxv
- info
->saved_auxv
);
2126 put_user_ual(argc
, u_argc
);
2128 p
= info
->arg_strings
;
2129 for (i
= 0; i
< argc
; ++i
) {
2130 put_user_ual(p
, u_argv
);
2132 p
+= target_strlen(p
) + 1;
2134 put_user_ual(0, u_argv
);
2136 p
= info
->env_strings
;
2137 for (i
= 0; i
< envc
; ++i
) {
2138 put_user_ual(p
, u_envp
);
2140 p
+= target_strlen(p
) + 1;
2142 put_user_ual(0, u_envp
);
2147 #ifndef ARM_COMMPAGE
2148 #define ARM_COMMPAGE 0
2149 #define init_guest_commpage() true
2152 static void pgb_fail_in_use(const char *image_name
)
2154 error_report("%s: requires virtual address space that is in use "
2155 "(omit the -B option or choose a different value)",
2160 static void pgb_have_guest_base(const char *image_name
, abi_ulong guest_loaddr
,
2161 abi_ulong guest_hiaddr
, long align
)
2163 const int flags
= MAP_ANONYMOUS
| MAP_PRIVATE
| MAP_NORESERVE
;
2166 if (!QEMU_IS_ALIGNED(guest_base
, align
)) {
2167 fprintf(stderr
, "Requested guest base %p does not satisfy "
2168 "host minimum alignment (0x%lx)\n",
2169 (void *)guest_base
, align
);
2173 /* Sanity check the guest binary. */
2175 if (guest_hiaddr
> reserved_va
) {
2176 error_report("%s: requires more than reserved virtual "
2177 "address space (0x%" PRIx64
" > 0x%lx)",
2178 image_name
, (uint64_t)guest_hiaddr
, reserved_va
);
2182 #if HOST_LONG_BITS < TARGET_ABI_BITS
2183 if ((guest_hiaddr
- guest_base
) > ~(uintptr_t)0) {
2184 error_report("%s: requires more virtual address space "
2185 "than the host can provide (0x%" PRIx64
")",
2186 image_name
, (uint64_t)guest_hiaddr
- guest_base
);
2193 * Expand the allocation to the entire reserved_va.
2194 * Exclude the mmap_min_addr hole.
2197 guest_loaddr
= (guest_base
>= mmap_min_addr
? 0
2198 : mmap_min_addr
- guest_base
);
2199 guest_hiaddr
= reserved_va
;
2202 /* Reserve the address space for the binary, or reserved_va. */
2203 test
= g2h_untagged(guest_loaddr
);
2204 addr
= mmap(test
, guest_hiaddr
- guest_loaddr
, PROT_NONE
, flags
, -1, 0);
2206 pgb_fail_in_use(image_name
);
2211 * pgd_find_hole_fallback: potential mmap address
2212 * @guest_size: size of available space
2213 * @brk: location of break
2214 * @align: memory alignment
2216 * This is a fallback method for finding a hole in the host address
2217 * space if we don't have the benefit of being able to access
2218 * /proc/self/map. It can potentially take a very long time as we can
2219 * only dumbly iterate up the host address space seeing if the
2220 * allocation would work.
2222 static uintptr_t pgd_find_hole_fallback(uintptr_t guest_size
, uintptr_t brk
,
2223 long align
, uintptr_t offset
)
2227 /* Start (aligned) at the bottom and work our way up */
2228 base
= ROUND_UP(mmap_min_addr
, align
);
2231 uintptr_t align_start
, end
;
2232 align_start
= ROUND_UP(base
, align
);
2233 end
= align_start
+ guest_size
+ offset
;
2235 /* if brk is anywhere in the range give ourselves some room to grow. */
2236 if (align_start
<= brk
&& brk
< end
) {
2237 base
= brk
+ (16 * MiB
);
2239 } else if (align_start
+ guest_size
< align_start
) {
2240 /* we have run out of space */
2243 int flags
= MAP_ANONYMOUS
| MAP_PRIVATE
| MAP_NORESERVE
|
2244 MAP_FIXED_NOREPLACE
;
2245 void * mmap_start
= mmap((void *) align_start
, guest_size
,
2246 PROT_NONE
, flags
, -1, 0);
2247 if (mmap_start
!= MAP_FAILED
) {
2248 munmap(mmap_start
, guest_size
);
2249 if (mmap_start
== (void *) align_start
) {
2250 return (uintptr_t) mmap_start
+ offset
;
2253 base
+= qemu_host_page_size
;
2258 /* Return value for guest_base, or -1 if no hole found. */
2259 static uintptr_t pgb_find_hole(uintptr_t guest_loaddr
, uintptr_t guest_size
,
2260 long align
, uintptr_t offset
)
2262 GSList
*maps
, *iter
;
2263 uintptr_t this_start
, this_end
, next_start
, brk
;
2266 assert(QEMU_IS_ALIGNED(guest_loaddr
, align
));
2268 maps
= read_self_maps();
2270 /* Read brk after we've read the maps, which will malloc. */
2271 brk
= (uintptr_t)sbrk(0);
2274 ret
= pgd_find_hole_fallback(guest_size
, brk
, align
, offset
);
2275 return ret
== -1 ? -1 : ret
- guest_loaddr
;
2278 /* The first hole is before the first map entry. */
2279 this_start
= mmap_min_addr
;
2281 for (iter
= maps
; iter
;
2282 this_start
= next_start
, iter
= g_slist_next(iter
)) {
2283 uintptr_t align_start
, hole_size
;
2285 this_end
= ((MapInfo
*)iter
->data
)->start
;
2286 next_start
= ((MapInfo
*)iter
->data
)->end
;
2287 align_start
= ROUND_UP(this_start
+ offset
, align
);
2289 /* Skip holes that are too small. */
2290 if (align_start
>= this_end
) {
2293 hole_size
= this_end
- align_start
;
2294 if (hole_size
< guest_size
) {
2298 /* If this hole contains brk, give ourselves some room to grow. */
2299 if (this_start
<= brk
&& brk
< this_end
) {
2300 hole_size
-= guest_size
;
2301 if (sizeof(uintptr_t) == 8 && hole_size
>= 1 * GiB
) {
2302 align_start
+= 1 * GiB
;
2303 } else if (hole_size
>= 16 * MiB
) {
2304 align_start
+= 16 * MiB
;
2306 align_start
= (this_end
- guest_size
) & -align
;
2307 if (align_start
< this_start
) {
2313 /* Record the lowest successful match. */
2315 ret
= align_start
- guest_loaddr
;
2317 /* If this hole contains the identity map, select it. */
2318 if (align_start
<= guest_loaddr
&&
2319 guest_loaddr
+ guest_size
<= this_end
) {
2322 /* If this hole ends above the identity map, stop looking. */
2323 if (this_end
>= guest_loaddr
) {
2327 free_self_maps(maps
);
2332 static void pgb_static(const char *image_name
, abi_ulong orig_loaddr
,
2333 abi_ulong orig_hiaddr
, long align
)
2335 uintptr_t loaddr
= orig_loaddr
;
2336 uintptr_t hiaddr
= orig_hiaddr
;
2337 uintptr_t offset
= 0;
2340 if (hiaddr
!= orig_hiaddr
) {
2341 error_report("%s: requires virtual address space that the "
2342 "host cannot provide (0x%" PRIx64
")",
2343 image_name
, (uint64_t)orig_hiaddr
);
2350 * Extend the allocation to include the commpage.
2351 * For a 64-bit host, this is just 4GiB; for a 32-bit host we
2352 * need to ensure there is space bellow the guest_base so we
2353 * can map the commpage in the place needed when the address
2354 * arithmetic wraps around.
2356 if (sizeof(uintptr_t) == 8 || loaddr
>= 0x80000000u
) {
2357 hiaddr
= (uintptr_t) 4 << 30;
2359 offset
= -(ARM_COMMPAGE
& -align
);
2363 addr
= pgb_find_hole(loaddr
, hiaddr
- loaddr
, align
, offset
);
2366 * If ARM_COMMPAGE, there *might* be a non-consecutive allocation
2367 * that can satisfy both. But as the normal arm32 link base address
2368 * is ~32k, and we extend down to include the commpage, making the
2369 * overhead only ~96k, this is unlikely.
2371 error_report("%s: Unable to allocate %#zx bytes of "
2372 "virtual address space", image_name
,
2373 (size_t)(hiaddr
- loaddr
));
2380 static void pgb_dynamic(const char *image_name
, long align
)
2383 * The executable is dynamic and does not require a fixed address.
2384 * All we need is a commpage that satisfies align.
2385 * If we do not need a commpage, leave guest_base == 0.
2388 uintptr_t addr
, commpage
;
2390 /* 64-bit hosts should have used reserved_va. */
2391 assert(sizeof(uintptr_t) == 4);
2394 * By putting the commpage at the first hole, that puts guest_base
2395 * just above that, and maximises the positive guest addresses.
2397 commpage
= ARM_COMMPAGE
& -align
;
2398 addr
= pgb_find_hole(commpage
, -commpage
, align
, 0);
2404 static void pgb_reserved_va(const char *image_name
, abi_ulong guest_loaddr
,
2405 abi_ulong guest_hiaddr
, long align
)
2407 int flags
= MAP_ANONYMOUS
| MAP_PRIVATE
| MAP_NORESERVE
;
2410 if (guest_hiaddr
> reserved_va
) {
2411 error_report("%s: requires more than reserved virtual "
2412 "address space (0x%" PRIx64
" > 0x%lx)",
2413 image_name
, (uint64_t)guest_hiaddr
, reserved_va
);
2417 /* Widen the "image" to the entire reserved address space. */
2418 pgb_static(image_name
, 0, reserved_va
, align
);
2420 /* osdep.h defines this as 0 if it's missing */
2421 flags
|= MAP_FIXED_NOREPLACE
;
2423 /* Reserve the memory on the host. */
2424 assert(guest_base
!= 0);
2425 test
= g2h_untagged(0);
2426 addr
= mmap(test
, reserved_va
, PROT_NONE
, flags
, -1, 0);
2427 if (addr
== MAP_FAILED
|| addr
!= test
) {
2428 error_report("Unable to reserve 0x%lx bytes of virtual address "
2429 "space at %p (%s) for use as guest address space (check your"
2430 "virtual memory ulimit setting, min_mmap_addr or reserve less "
2431 "using -R option)", reserved_va
, test
, strerror(errno
));
2436 void probe_guest_base(const char *image_name
, abi_ulong guest_loaddr
,
2437 abi_ulong guest_hiaddr
)
2439 /* In order to use host shmat, we must be able to honor SHMLBA. */
2440 uintptr_t align
= MAX(SHMLBA
, qemu_host_page_size
);
2442 if (have_guest_base
) {
2443 pgb_have_guest_base(image_name
, guest_loaddr
, guest_hiaddr
, align
);
2444 } else if (reserved_va
) {
2445 pgb_reserved_va(image_name
, guest_loaddr
, guest_hiaddr
, align
);
2446 } else if (guest_loaddr
) {
2447 pgb_static(image_name
, guest_loaddr
, guest_hiaddr
, align
);
2449 pgb_dynamic(image_name
, align
);
2452 /* Reserve and initialize the commpage. */
2453 if (!init_guest_commpage()) {
2455 * With have_guest_base, the user has selected the address and
2456 * we are trying to work with that. Otherwise, we have selected
2457 * free space and init_guest_commpage must succeeded.
2459 assert(have_guest_base
);
2460 pgb_fail_in_use(image_name
);
2463 assert(QEMU_IS_ALIGNED(guest_base
, align
));
2464 qemu_log_mask(CPU_LOG_PAGE
, "Locating guest address space "
2465 "@ 0x%" PRIx64
"\n", (uint64_t)guest_base
);
2469 /* The string "GNU\0" as a magic number. */
2470 GNU0_MAGIC
= const_le32('G' | 'N' << 8 | 'U' << 16),
2471 NOTE_DATA_SZ
= 1 * KiB
,
2473 ELF_GNU_PROPERTY_ALIGN
= ELF_CLASS
== ELFCLASS32
? 4 : 8,
2477 * Process a single gnu_property entry.
2478 * Return false for error.
2480 static bool parse_elf_property(const uint32_t *data
, int *off
, int datasz
,
2481 struct image_info
*info
, bool have_prev_type
,
2482 uint32_t *prev_type
, Error
**errp
)
2484 uint32_t pr_type
, pr_datasz
, step
;
2486 if (*off
> datasz
|| !QEMU_IS_ALIGNED(*off
, ELF_GNU_PROPERTY_ALIGN
)) {
2490 data
+= *off
/ sizeof(uint32_t);
2492 if (datasz
< 2 * sizeof(uint32_t)) {
2496 pr_datasz
= data
[1];
2498 datasz
-= 2 * sizeof(uint32_t);
2499 step
= ROUND_UP(pr_datasz
, ELF_GNU_PROPERTY_ALIGN
);
2500 if (step
> datasz
) {
2504 /* Properties are supposed to be unique and sorted on pr_type. */
2505 if (have_prev_type
&& pr_type
<= *prev_type
) {
2506 if (pr_type
== *prev_type
) {
2507 error_setg(errp
, "Duplicate property in PT_GNU_PROPERTY");
2509 error_setg(errp
, "Unsorted property in PT_GNU_PROPERTY");
2513 *prev_type
= pr_type
;
2515 if (!arch_parse_elf_property(pr_type
, pr_datasz
, data
, info
, errp
)) {
2519 *off
+= 2 * sizeof(uint32_t) + step
;
2523 error_setg(errp
, "Ill-formed property in PT_GNU_PROPERTY");
2527 /* Process NT_GNU_PROPERTY_TYPE_0. */
2528 static bool parse_elf_properties(int image_fd
,
2529 struct image_info
*info
,
2530 const struct elf_phdr
*phdr
,
2531 char bprm_buf
[BPRM_BUF_SIZE
],
2535 struct elf_note nhdr
;
2536 uint32_t data
[NOTE_DATA_SZ
/ sizeof(uint32_t)];
2540 bool have_prev_type
;
2543 /* Unless the arch requires properties, ignore them. */
2544 if (!ARCH_USE_GNU_PROPERTY
) {
2548 /* If the properties are crazy large, that's too bad. */
2550 if (n
> sizeof(note
)) {
2551 error_setg(errp
, "PT_GNU_PROPERTY too large");
2554 if (n
< sizeof(note
.nhdr
)) {
2555 error_setg(errp
, "PT_GNU_PROPERTY too small");
2559 if (phdr
->p_offset
+ n
<= BPRM_BUF_SIZE
) {
2560 memcpy(¬e
, bprm_buf
+ phdr
->p_offset
, n
);
2562 ssize_t len
= pread(image_fd
, ¬e
, n
, phdr
->p_offset
);
2564 error_setg_errno(errp
, errno
, "Error reading file header");
2570 * The contents of a valid PT_GNU_PROPERTY is a sequence
2571 * of uint32_t -- swap them all now.
2574 for (int i
= 0; i
< n
/ 4; i
++) {
2575 bswap32s(note
.data
+ i
);
2580 * Note that nhdr is 3 words, and that the "name" described by namesz
2581 * immediately follows nhdr and is thus at the 4th word. Further, all
2582 * of the inputs to the kernel's round_up are multiples of 4.
2584 if (note
.nhdr
.n_type
!= NT_GNU_PROPERTY_TYPE_0
||
2585 note
.nhdr
.n_namesz
!= NOTE_NAME_SZ
||
2586 note
.data
[3] != GNU0_MAGIC
) {
2587 error_setg(errp
, "Invalid note in PT_GNU_PROPERTY");
2590 off
= sizeof(note
.nhdr
) + NOTE_NAME_SZ
;
2592 datasz
= note
.nhdr
.n_descsz
+ off
;
2594 error_setg(errp
, "Invalid note size in PT_GNU_PROPERTY");
2598 have_prev_type
= false;
2601 if (off
== datasz
) {
2602 return true; /* end, exit ok */
2604 if (!parse_elf_property(note
.data
, &off
, datasz
, info
,
2605 have_prev_type
, &prev_type
, errp
)) {
2608 have_prev_type
= true;
2612 /* Load an ELF image into the address space.
2614 IMAGE_NAME is the filename of the image, to use in error messages.
2615 IMAGE_FD is the open file descriptor for the image.
2617 BPRM_BUF is a copy of the beginning of the file; this of course
2618 contains the elf file header at offset 0. It is assumed that this
2619 buffer is sufficiently aligned to present no problems to the host
2620 in accessing data at aligned offsets within the buffer.
2622 On return: INFO values will be filled in, as necessary or available. */
2624 static void load_elf_image(const char *image_name
, int image_fd
,
2625 struct image_info
*info
, char **pinterp_name
,
2626 char bprm_buf
[BPRM_BUF_SIZE
])
2628 struct elfhdr
*ehdr
= (struct elfhdr
*)bprm_buf
;
2629 struct elf_phdr
*phdr
;
2630 abi_ulong load_addr
, load_bias
, loaddr
, hiaddr
, error
;
2631 int i
, retval
, prot_exec
;
2634 /* First of all, some simple consistency checks */
2635 if (!elf_check_ident(ehdr
)) {
2636 error_setg(&err
, "Invalid ELF image for this architecture");
2640 if (!elf_check_ehdr(ehdr
)) {
2641 error_setg(&err
, "Invalid ELF image for this architecture");
2645 i
= ehdr
->e_phnum
* sizeof(struct elf_phdr
);
2646 if (ehdr
->e_phoff
+ i
<= BPRM_BUF_SIZE
) {
2647 phdr
= (struct elf_phdr
*)(bprm_buf
+ ehdr
->e_phoff
);
2649 phdr
= (struct elf_phdr
*) alloca(i
);
2650 retval
= pread(image_fd
, phdr
, i
, ehdr
->e_phoff
);
2655 bswap_phdr(phdr
, ehdr
->e_phnum
);
2658 info
->pt_dynamic_addr
= 0;
2663 * Find the maximum size of the image and allocate an appropriate
2664 * amount of memory to handle that. Locate the interpreter, if any.
2666 loaddr
= -1, hiaddr
= 0;
2667 info
->alignment
= 0;
2668 for (i
= 0; i
< ehdr
->e_phnum
; ++i
) {
2669 struct elf_phdr
*eppnt
= phdr
+ i
;
2670 if (eppnt
->p_type
== PT_LOAD
) {
2671 abi_ulong a
= eppnt
->p_vaddr
- eppnt
->p_offset
;
2675 a
= eppnt
->p_vaddr
+ eppnt
->p_memsz
;
2680 info
->alignment
|= eppnt
->p_align
;
2681 } else if (eppnt
->p_type
== PT_INTERP
&& pinterp_name
) {
2682 g_autofree
char *interp_name
= NULL
;
2684 if (*pinterp_name
) {
2685 error_setg(&err
, "Multiple PT_INTERP entries");
2689 interp_name
= g_malloc(eppnt
->p_filesz
);
2691 if (eppnt
->p_offset
+ eppnt
->p_filesz
<= BPRM_BUF_SIZE
) {
2692 memcpy(interp_name
, bprm_buf
+ eppnt
->p_offset
,
2695 retval
= pread(image_fd
, interp_name
, eppnt
->p_filesz
,
2697 if (retval
!= eppnt
->p_filesz
) {
2701 if (interp_name
[eppnt
->p_filesz
- 1] != 0) {
2702 error_setg(&err
, "Invalid PT_INTERP entry");
2705 *pinterp_name
= g_steal_pointer(&interp_name
);
2706 } else if (eppnt
->p_type
== PT_GNU_PROPERTY
) {
2707 if (!parse_elf_properties(image_fd
, info
, eppnt
, bprm_buf
, &err
)) {
2713 if (pinterp_name
!= NULL
) {
2715 * This is the main executable.
2717 * Reserve extra space for brk.
2718 * We hold on to this space while placing the interpreter
2719 * and the stack, lest they be placed immediately after
2720 * the data segment and block allocation from the brk.
2722 * 16MB is chosen as "large enough" without being so large
2723 * as to allow the result to not fit with a 32-bit guest on
2726 info
->reserve_brk
= 16 * MiB
;
2727 hiaddr
+= info
->reserve_brk
;
2729 if (ehdr
->e_type
== ET_EXEC
) {
2731 * Make sure that the low address does not conflict with
2732 * MMAP_MIN_ADDR or the QEMU application itself.
2734 probe_guest_base(image_name
, loaddr
, hiaddr
);
2737 * The binary is dynamic, but we still need to
2738 * select guest_base. In this case we pass a size.
2740 probe_guest_base(image_name
, 0, hiaddr
- loaddr
);
2745 * Reserve address space for all of this.
2747 * In the case of ET_EXEC, we supply MAP_FIXED so that we get
2748 * exactly the address range that is required.
2750 * Otherwise this is ET_DYN, and we are searching for a location
2751 * that can hold the memory space required. If the image is
2752 * pre-linked, LOADDR will be non-zero, and the kernel should
2753 * honor that address if it happens to be free.
2755 * In both cases, we will overwrite pages in this range with mappings
2756 * from the executable.
2758 load_addr
= target_mmap(loaddr
, hiaddr
- loaddr
, PROT_NONE
,
2759 MAP_PRIVATE
| MAP_ANON
| MAP_NORESERVE
|
2760 (ehdr
->e_type
== ET_EXEC
? MAP_FIXED
: 0),
2762 if (load_addr
== -1) {
2765 load_bias
= load_addr
- loaddr
;
2767 if (elf_is_fdpic(ehdr
)) {
2768 struct elf32_fdpic_loadseg
*loadsegs
= info
->loadsegs
=
2769 g_malloc(sizeof(*loadsegs
) * info
->nsegs
);
2771 for (i
= 0; i
< ehdr
->e_phnum
; ++i
) {
2772 switch (phdr
[i
].p_type
) {
2774 info
->pt_dynamic_addr
= phdr
[i
].p_vaddr
+ load_bias
;
2777 loadsegs
->addr
= phdr
[i
].p_vaddr
+ load_bias
;
2778 loadsegs
->p_vaddr
= phdr
[i
].p_vaddr
;
2779 loadsegs
->p_memsz
= phdr
[i
].p_memsz
;
2786 info
->load_bias
= load_bias
;
2787 info
->code_offset
= load_bias
;
2788 info
->data_offset
= load_bias
;
2789 info
->load_addr
= load_addr
;
2790 info
->entry
= ehdr
->e_entry
+ load_bias
;
2791 info
->start_code
= -1;
2793 info
->start_data
= -1;
2796 info
->elf_flags
= ehdr
->e_flags
;
2798 prot_exec
= PROT_EXEC
;
2799 #ifdef TARGET_AARCH64
2801 * If the BTI feature is present, this indicates that the executable
2802 * pages of the startup binary should be mapped with PROT_BTI, so that
2803 * branch targets are enforced.
2805 * The startup binary is either the interpreter or the static executable.
2806 * The interpreter is responsible for all pages of a dynamic executable.
2808 * Elf notes are backward compatible to older cpus.
2809 * Do not enable BTI unless it is supported.
2811 if ((info
->note_flags
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
)
2812 && (pinterp_name
== NULL
|| *pinterp_name
== 0)
2813 && cpu_isar_feature(aa64_bti
, ARM_CPU(thread_cpu
))) {
2814 prot_exec
|= TARGET_PROT_BTI
;
2818 for (i
= 0; i
< ehdr
->e_phnum
; i
++) {
2819 struct elf_phdr
*eppnt
= phdr
+ i
;
2820 if (eppnt
->p_type
== PT_LOAD
) {
2821 abi_ulong vaddr
, vaddr_po
, vaddr_ps
, vaddr_ef
, vaddr_em
, vaddr_len
;
2824 if (eppnt
->p_flags
& PF_R
) {
2825 elf_prot
|= PROT_READ
;
2827 if (eppnt
->p_flags
& PF_W
) {
2828 elf_prot
|= PROT_WRITE
;
2830 if (eppnt
->p_flags
& PF_X
) {
2831 elf_prot
|= prot_exec
;
2834 vaddr
= load_bias
+ eppnt
->p_vaddr
;
2835 vaddr_po
= TARGET_ELF_PAGEOFFSET(vaddr
);
2836 vaddr_ps
= TARGET_ELF_PAGESTART(vaddr
);
2838 vaddr_ef
= vaddr
+ eppnt
->p_filesz
;
2839 vaddr_em
= vaddr
+ eppnt
->p_memsz
;
2842 * Some segments may be completely empty, with a non-zero p_memsz
2843 * but no backing file segment.
2845 if (eppnt
->p_filesz
!= 0) {
2846 vaddr_len
= TARGET_ELF_PAGELENGTH(eppnt
->p_filesz
+ vaddr_po
);
2847 error
= target_mmap(vaddr_ps
, vaddr_len
, elf_prot
,
2848 MAP_PRIVATE
| MAP_FIXED
,
2849 image_fd
, eppnt
->p_offset
- vaddr_po
);
2856 * If the load segment requests extra zeros (e.g. bss), map it.
2858 if (eppnt
->p_filesz
< eppnt
->p_memsz
) {
2859 zero_bss(vaddr_ef
, vaddr_em
, elf_prot
);
2861 } else if (eppnt
->p_memsz
!= 0) {
2862 vaddr_len
= TARGET_ELF_PAGELENGTH(eppnt
->p_memsz
+ vaddr_po
);
2863 error
= target_mmap(vaddr_ps
, vaddr_len
, elf_prot
,
2864 MAP_PRIVATE
| MAP_FIXED
| MAP_ANONYMOUS
,
2872 /* Find the full program boundaries. */
2873 if (elf_prot
& PROT_EXEC
) {
2874 if (vaddr
< info
->start_code
) {
2875 info
->start_code
= vaddr
;
2877 if (vaddr_ef
> info
->end_code
) {
2878 info
->end_code
= vaddr_ef
;
2881 if (elf_prot
& PROT_WRITE
) {
2882 if (vaddr
< info
->start_data
) {
2883 info
->start_data
= vaddr
;
2885 if (vaddr_ef
> info
->end_data
) {
2886 info
->end_data
= vaddr_ef
;
2889 if (vaddr_em
> info
->brk
) {
2890 info
->brk
= vaddr_em
;
2893 } else if (eppnt
->p_type
== PT_MIPS_ABIFLAGS
) {
2894 Mips_elf_abiflags_v0 abiflags
;
2895 if (eppnt
->p_filesz
< sizeof(Mips_elf_abiflags_v0
)) {
2896 error_setg(&err
, "Invalid PT_MIPS_ABIFLAGS entry");
2899 if (eppnt
->p_offset
+ eppnt
->p_filesz
<= BPRM_BUF_SIZE
) {
2900 memcpy(&abiflags
, bprm_buf
+ eppnt
->p_offset
,
2901 sizeof(Mips_elf_abiflags_v0
));
2903 retval
= pread(image_fd
, &abiflags
, sizeof(Mips_elf_abiflags_v0
),
2905 if (retval
!= sizeof(Mips_elf_abiflags_v0
)) {
2909 bswap_mips_abiflags(&abiflags
);
2910 info
->fp_abi
= abiflags
.fp_abi
;
2915 if (info
->end_data
== 0) {
2916 info
->start_data
= info
->end_code
;
2917 info
->end_data
= info
->end_code
;
2920 if (qemu_log_enabled()) {
2921 load_symbols(ehdr
, image_fd
, load_bias
);
2931 error_setg(&err
, "Incomplete read of file header");
2933 error_setg_errno(&err
, errno
, "Error reading file header");
2937 error_setg_errno(&err
, errno
, "Error mapping file");
2940 error_reportf_err(err
, "%s: ", image_name
);
2944 static void load_elf_interp(const char *filename
, struct image_info
*info
,
2945 char bprm_buf
[BPRM_BUF_SIZE
])
2950 fd
= open(path(filename
), O_RDONLY
);
2952 error_setg_file_open(&err
, errno
, filename
);
2953 error_report_err(err
);
2957 retval
= read(fd
, bprm_buf
, BPRM_BUF_SIZE
);
2959 error_setg_errno(&err
, errno
, "Error reading file header");
2960 error_reportf_err(err
, "%s: ", filename
);
2964 if (retval
< BPRM_BUF_SIZE
) {
2965 memset(bprm_buf
+ retval
, 0, BPRM_BUF_SIZE
- retval
);
2968 load_elf_image(filename
, fd
, info
, NULL
, bprm_buf
);
2971 static int symfind(const void *s0
, const void *s1
)
2973 target_ulong addr
= *(target_ulong
*)s0
;
2974 struct elf_sym
*sym
= (struct elf_sym
*)s1
;
2976 if (addr
< sym
->st_value
) {
2978 } else if (addr
>= sym
->st_value
+ sym
->st_size
) {
2984 static const char *lookup_symbolxx(struct syminfo
*s
, target_ulong orig_addr
)
2986 #if ELF_CLASS == ELFCLASS32
2987 struct elf_sym
*syms
= s
->disas_symtab
.elf32
;
2989 struct elf_sym
*syms
= s
->disas_symtab
.elf64
;
2993 struct elf_sym
*sym
;
2995 sym
= bsearch(&orig_addr
, syms
, s
->disas_num_syms
, sizeof(*syms
), symfind
);
2997 return s
->disas_strtab
+ sym
->st_name
;
3003 /* FIXME: This should use elf_ops.h */
3004 static int symcmp(const void *s0
, const void *s1
)
3006 struct elf_sym
*sym0
= (struct elf_sym
*)s0
;
3007 struct elf_sym
*sym1
= (struct elf_sym
*)s1
;
3008 return (sym0
->st_value
< sym1
->st_value
)
3010 : ((sym0
->st_value
> sym1
->st_value
) ? 1 : 0);
3013 /* Best attempt to load symbols from this ELF object. */
3014 static void load_symbols(struct elfhdr
*hdr
, int fd
, abi_ulong load_bias
)
3016 int i
, shnum
, nsyms
, sym_idx
= 0, str_idx
= 0;
3018 struct elf_shdr
*shdr
;
3019 char *strings
= NULL
;
3020 struct syminfo
*s
= NULL
;
3021 struct elf_sym
*new_syms
, *syms
= NULL
;
3023 shnum
= hdr
->e_shnum
;
3024 i
= shnum
* sizeof(struct elf_shdr
);
3025 shdr
= (struct elf_shdr
*)alloca(i
);
3026 if (pread(fd
, shdr
, i
, hdr
->e_shoff
) != i
) {
3030 bswap_shdr(shdr
, shnum
);
3031 for (i
= 0; i
< shnum
; ++i
) {
3032 if (shdr
[i
].sh_type
== SHT_SYMTAB
) {
3034 str_idx
= shdr
[i
].sh_link
;
3039 /* There will be no symbol table if the file was stripped. */
3043 /* Now know where the strtab and symtab are. Snarf them. */
3044 s
= g_try_new(struct syminfo
, 1);
3049 segsz
= shdr
[str_idx
].sh_size
;
3050 s
->disas_strtab
= strings
= g_try_malloc(segsz
);
3052 pread(fd
, strings
, segsz
, shdr
[str_idx
].sh_offset
) != segsz
) {
3056 segsz
= shdr
[sym_idx
].sh_size
;
3057 syms
= g_try_malloc(segsz
);
3058 if (!syms
|| pread(fd
, syms
, segsz
, shdr
[sym_idx
].sh_offset
) != segsz
) {
3062 if (segsz
/ sizeof(struct elf_sym
) > INT_MAX
) {
3063 /* Implausibly large symbol table: give up rather than ploughing
3064 * on with the number of symbols calculation overflowing
3068 nsyms
= segsz
/ sizeof(struct elf_sym
);
3069 for (i
= 0; i
< nsyms
; ) {
3070 bswap_sym(syms
+ i
);
3071 /* Throw away entries which we do not need. */
3072 if (syms
[i
].st_shndx
== SHN_UNDEF
3073 || syms
[i
].st_shndx
>= SHN_LORESERVE
3074 || ELF_ST_TYPE(syms
[i
].st_info
) != STT_FUNC
) {
3076 syms
[i
] = syms
[nsyms
];
3079 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
3080 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
3081 syms
[i
].st_value
&= ~(target_ulong
)1;
3083 syms
[i
].st_value
+= load_bias
;
3088 /* No "useful" symbol. */
3093 /* Attempt to free the storage associated with the local symbols
3094 that we threw away. Whether or not this has any effect on the
3095 memory allocation depends on the malloc implementation and how
3096 many symbols we managed to discard. */
3097 new_syms
= g_try_renew(struct elf_sym
, syms
, nsyms
);
3098 if (new_syms
== NULL
) {
3103 qsort(syms
, nsyms
, sizeof(*syms
), symcmp
);
3105 s
->disas_num_syms
= nsyms
;
3106 #if ELF_CLASS == ELFCLASS32
3107 s
->disas_symtab
.elf32
= syms
;
3109 s
->disas_symtab
.elf64
= syms
;
3111 s
->lookup_symbol
= lookup_symbolxx
;
3123 uint32_t get_elf_eflags(int fd
)
3129 /* Read ELF header */
3130 offset
= lseek(fd
, 0, SEEK_SET
);
3131 if (offset
== (off_t
) -1) {
3134 ret
= read(fd
, &ehdr
, sizeof(ehdr
));
3135 if (ret
< sizeof(ehdr
)) {
3138 offset
= lseek(fd
, offset
, SEEK_SET
);
3139 if (offset
== (off_t
) -1) {
3143 /* Check ELF signature */
3144 if (!elf_check_ident(&ehdr
)) {
3150 if (!elf_check_ehdr(&ehdr
)) {
3154 /* return architecture id */
3155 return ehdr
.e_flags
;
3158 int load_elf_binary(struct linux_binprm
*bprm
, struct image_info
*info
)
3160 struct image_info interp_info
;
3161 struct elfhdr elf_ex
;
3162 char *elf_interpreter
= NULL
;
3165 memset(&interp_info
, 0, sizeof(interp_info
));
3167 interp_info
.fp_abi
= MIPS_ABI_FP_UNKNOWN
;
3170 info
->start_mmap
= (abi_ulong
)ELF_START_MMAP
;
3172 load_elf_image(bprm
->filename
, bprm
->fd
, info
,
3173 &elf_interpreter
, bprm
->buf
);
3175 /* ??? We need a copy of the elf header for passing to create_elf_tables.
3176 If we do nothing, we'll have overwritten this when we re-use bprm->buf
3177 when we load the interpreter. */
3178 elf_ex
= *(struct elfhdr
*)bprm
->buf
;
3180 /* Do this so that we can load the interpreter, if need be. We will
3181 change some of these later */
3182 bprm
->p
= setup_arg_pages(bprm
, info
);
3184 scratch
= g_new0(char, TARGET_PAGE_SIZE
);
3185 if (STACK_GROWS_DOWN
) {
3186 bprm
->p
= copy_elf_strings(1, &bprm
->filename
, scratch
,
3187 bprm
->p
, info
->stack_limit
);
3188 info
->file_string
= bprm
->p
;
3189 bprm
->p
= copy_elf_strings(bprm
->envc
, bprm
->envp
, scratch
,
3190 bprm
->p
, info
->stack_limit
);
3191 info
->env_strings
= bprm
->p
;
3192 bprm
->p
= copy_elf_strings(bprm
->argc
, bprm
->argv
, scratch
,
3193 bprm
->p
, info
->stack_limit
);
3194 info
->arg_strings
= bprm
->p
;
3196 info
->arg_strings
= bprm
->p
;
3197 bprm
->p
= copy_elf_strings(bprm
->argc
, bprm
->argv
, scratch
,
3198 bprm
->p
, info
->stack_limit
);
3199 info
->env_strings
= bprm
->p
;
3200 bprm
->p
= copy_elf_strings(bprm
->envc
, bprm
->envp
, scratch
,
3201 bprm
->p
, info
->stack_limit
);
3202 info
->file_string
= bprm
->p
;
3203 bprm
->p
= copy_elf_strings(1, &bprm
->filename
, scratch
,
3204 bprm
->p
, info
->stack_limit
);
3210 fprintf(stderr
, "%s: %s\n", bprm
->filename
, strerror(E2BIG
));
3214 if (elf_interpreter
) {
3215 load_elf_interp(elf_interpreter
, &interp_info
, bprm
->buf
);
3217 /* If the program interpreter is one of these two, then assume
3218 an iBCS2 image. Otherwise assume a native linux image. */
3220 if (strcmp(elf_interpreter
, "/usr/lib/libc.so.1") == 0
3221 || strcmp(elf_interpreter
, "/usr/lib/ld.so.1") == 0) {
3222 info
->personality
= PER_SVR4
;
3224 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
3225 and some applications "depend" upon this behavior. Since
3226 we do not have the power to recompile these, we emulate
3227 the SVr4 behavior. Sigh. */
3228 target_mmap(0, qemu_host_page_size
, PROT_READ
| PROT_EXEC
,
3229 MAP_FIXED
| MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
3232 info
->interp_fp_abi
= interp_info
.fp_abi
;
3236 bprm
->p
= create_elf_tables(bprm
->p
, bprm
->argc
, bprm
->envc
, &elf_ex
,
3237 info
, (elf_interpreter
? &interp_info
: NULL
));
3238 info
->start_stack
= bprm
->p
;
3240 /* If we have an interpreter, set that as the program's entry point.
3241 Copy the load_bias as well, to help PPC64 interpret the entry
3242 point as a function descriptor. Do this after creating elf tables
3243 so that we copy the original program entry point into the AUXV. */
3244 if (elf_interpreter
) {
3245 info
->load_bias
= interp_info
.load_bias
;
3246 info
->entry
= interp_info
.entry
;
3247 g_free(elf_interpreter
);
3250 #ifdef USE_ELF_CORE_DUMP
3251 bprm
->core_dump
= &elf_core_dump
;
3255 * If we reserved extra space for brk, release it now.
3256 * The implementation of do_brk in syscalls.c expects to be able
3257 * to mmap pages in this space.
3259 if (info
->reserve_brk
) {
3260 abi_ulong start_brk
= HOST_PAGE_ALIGN(info
->brk
);
3261 abi_ulong end_brk
= HOST_PAGE_ALIGN(info
->brk
+ info
->reserve_brk
);
3262 target_munmap(start_brk
, end_brk
- start_brk
);
3268 #ifdef USE_ELF_CORE_DUMP
3270 * Definitions to generate Intel SVR4-like core files.
3271 * These mostly have the same names as the SVR4 types with "target_elf_"
3272 * tacked on the front to prevent clashes with linux definitions,
3273 * and the typedef forms have been avoided. This is mostly like
3274 * the SVR4 structure, but more Linuxy, with things that Linux does
3275 * not support and which gdb doesn't really use excluded.
3277 * Fields we don't dump (their contents is zero) in linux-user qemu
3278 * are marked with XXX.
3280 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
3282 * Porting ELF coredump for target is (quite) simple process. First you
3283 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
3284 * the target resides):
3286 * #define USE_ELF_CORE_DUMP
3288 * Next you define type of register set used for dumping. ELF specification
3289 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
3291 * typedef <target_regtype> target_elf_greg_t;
3292 * #define ELF_NREG <number of registers>
3293 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
3295 * Last step is to implement target specific function that copies registers
3296 * from given cpu into just specified register set. Prototype is:
3298 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
3299 * const CPUArchState *env);
3302 * regs - copy register values into here (allocated and zeroed by caller)
3303 * env - copy registers from here
3305 * Example for ARM target is provided in this file.
3308 /* An ELF note in memory */
3312 size_t namesz_rounded
;
3315 size_t datasz_rounded
;
3320 struct target_elf_siginfo
{
3321 abi_int si_signo
; /* signal number */
3322 abi_int si_code
; /* extra code */
3323 abi_int si_errno
; /* errno */
3326 struct target_elf_prstatus
{
3327 struct target_elf_siginfo pr_info
; /* Info associated with signal */
3328 abi_short pr_cursig
; /* Current signal */
3329 abi_ulong pr_sigpend
; /* XXX */
3330 abi_ulong pr_sighold
; /* XXX */
3331 target_pid_t pr_pid
;
3332 target_pid_t pr_ppid
;
3333 target_pid_t pr_pgrp
;
3334 target_pid_t pr_sid
;
3335 struct target_timeval pr_utime
; /* XXX User time */
3336 struct target_timeval pr_stime
; /* XXX System time */
3337 struct target_timeval pr_cutime
; /* XXX Cumulative user time */
3338 struct target_timeval pr_cstime
; /* XXX Cumulative system time */
3339 target_elf_gregset_t pr_reg
; /* GP registers */
3340 abi_int pr_fpvalid
; /* XXX */
3343 #define ELF_PRARGSZ (80) /* Number of chars for args */
3345 struct target_elf_prpsinfo
{
3346 char pr_state
; /* numeric process state */
3347 char pr_sname
; /* char for pr_state */
3348 char pr_zomb
; /* zombie */
3349 char pr_nice
; /* nice val */
3350 abi_ulong pr_flag
; /* flags */
3351 target_uid_t pr_uid
;
3352 target_gid_t pr_gid
;
3353 target_pid_t pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
3355 char pr_fname
[16] QEMU_NONSTRING
; /* filename of executable */
3356 char pr_psargs
[ELF_PRARGSZ
]; /* initial part of arg list */
3359 /* Here is the structure in which status of each thread is captured. */
3360 struct elf_thread_status
{
3361 QTAILQ_ENTRY(elf_thread_status
) ets_link
;
3362 struct target_elf_prstatus prstatus
; /* NT_PRSTATUS */
3364 elf_fpregset_t fpu
; /* NT_PRFPREG */
3365 struct task_struct
*thread
;
3366 elf_fpxregset_t xfpu
; /* ELF_CORE_XFPREG_TYPE */
3368 struct memelfnote notes
[1];
3372 struct elf_note_info
{
3373 struct memelfnote
*notes
;
3374 struct target_elf_prstatus
*prstatus
; /* NT_PRSTATUS */
3375 struct target_elf_prpsinfo
*psinfo
; /* NT_PRPSINFO */
3377 QTAILQ_HEAD(, elf_thread_status
) thread_list
;
3380 * Current version of ELF coredump doesn't support
3381 * dumping fp regs etc.
3383 elf_fpregset_t
*fpu
;
3384 elf_fpxregset_t
*xfpu
;
3385 int thread_status_size
;
3391 struct vm_area_struct
{
3392 target_ulong vma_start
; /* start vaddr of memory region */
3393 target_ulong vma_end
; /* end vaddr of memory region */
3394 abi_ulong vma_flags
; /* protection etc. flags for the region */
3395 QTAILQ_ENTRY(vm_area_struct
) vma_link
;
3399 QTAILQ_HEAD(, vm_area_struct
) mm_mmap
;
3400 int mm_count
; /* number of mappings */
3403 static struct mm_struct
*vma_init(void);
3404 static void vma_delete(struct mm_struct
*);
3405 static int vma_add_mapping(struct mm_struct
*, target_ulong
,
3406 target_ulong
, abi_ulong
);
3407 static int vma_get_mapping_count(const struct mm_struct
*);
3408 static struct vm_area_struct
*vma_first(const struct mm_struct
*);
3409 static struct vm_area_struct
*vma_next(struct vm_area_struct
*);
3410 static abi_ulong
vma_dump_size(const struct vm_area_struct
*);
3411 static int vma_walker(void *priv
, target_ulong start
, target_ulong end
,
3412 unsigned long flags
);
3414 static void fill_elf_header(struct elfhdr
*, int, uint16_t, uint32_t);
3415 static void fill_note(struct memelfnote
*, const char *, int,
3416 unsigned int, void *);
3417 static void fill_prstatus(struct target_elf_prstatus
*, const TaskState
*, int);
3418 static int fill_psinfo(struct target_elf_prpsinfo
*, const TaskState
*);
3419 static void fill_auxv_note(struct memelfnote
*, const TaskState
*);
3420 static void fill_elf_note_phdr(struct elf_phdr
*, int, off_t
);
3421 static size_t note_size(const struct memelfnote
*);
3422 static void free_note_info(struct elf_note_info
*);
3423 static int fill_note_info(struct elf_note_info
*, long, const CPUArchState
*);
3424 static void fill_thread_info(struct elf_note_info
*, const CPUArchState
*);
3426 static int dump_write(int, const void *, size_t);
3427 static int write_note(struct memelfnote
*, int);
3428 static int write_note_info(struct elf_note_info
*, int);
3431 static void bswap_prstatus(struct target_elf_prstatus
*prstatus
)
3433 prstatus
->pr_info
.si_signo
= tswap32(prstatus
->pr_info
.si_signo
);
3434 prstatus
->pr_info
.si_code
= tswap32(prstatus
->pr_info
.si_code
);
3435 prstatus
->pr_info
.si_errno
= tswap32(prstatus
->pr_info
.si_errno
);
3436 prstatus
->pr_cursig
= tswap16(prstatus
->pr_cursig
);
3437 prstatus
->pr_sigpend
= tswapal(prstatus
->pr_sigpend
);
3438 prstatus
->pr_sighold
= tswapal(prstatus
->pr_sighold
);
3439 prstatus
->pr_pid
= tswap32(prstatus
->pr_pid
);
3440 prstatus
->pr_ppid
= tswap32(prstatus
->pr_ppid
);
3441 prstatus
->pr_pgrp
= tswap32(prstatus
->pr_pgrp
);
3442 prstatus
->pr_sid
= tswap32(prstatus
->pr_sid
);
3443 /* cpu times are not filled, so we skip them */
3444 /* regs should be in correct format already */
3445 prstatus
->pr_fpvalid
= tswap32(prstatus
->pr_fpvalid
);
3448 static void bswap_psinfo(struct target_elf_prpsinfo
*psinfo
)
3450 psinfo
->pr_flag
= tswapal(psinfo
->pr_flag
);
3451 psinfo
->pr_uid
= tswap16(psinfo
->pr_uid
);
3452 psinfo
->pr_gid
= tswap16(psinfo
->pr_gid
);
3453 psinfo
->pr_pid
= tswap32(psinfo
->pr_pid
);
3454 psinfo
->pr_ppid
= tswap32(psinfo
->pr_ppid
);
3455 psinfo
->pr_pgrp
= tswap32(psinfo
->pr_pgrp
);
3456 psinfo
->pr_sid
= tswap32(psinfo
->pr_sid
);
3459 static void bswap_note(struct elf_note
*en
)
3461 bswap32s(&en
->n_namesz
);
3462 bswap32s(&en
->n_descsz
);
3463 bswap32s(&en
->n_type
);
3466 static inline void bswap_prstatus(struct target_elf_prstatus
*p
) { }
3467 static inline void bswap_psinfo(struct target_elf_prpsinfo
*p
) {}
3468 static inline void bswap_note(struct elf_note
*en
) { }
3469 #endif /* BSWAP_NEEDED */
3472 * Minimal support for linux memory regions. These are needed
3473 * when we are finding out what memory exactly belongs to
3474 * emulated process. No locks needed here, as long as
3475 * thread that received the signal is stopped.
3478 static struct mm_struct
*vma_init(void)
3480 struct mm_struct
*mm
;
3482 if ((mm
= g_malloc(sizeof (*mm
))) == NULL
)
3486 QTAILQ_INIT(&mm
->mm_mmap
);
3491 static void vma_delete(struct mm_struct
*mm
)
3493 struct vm_area_struct
*vma
;
3495 while ((vma
= vma_first(mm
)) != NULL
) {
3496 QTAILQ_REMOVE(&mm
->mm_mmap
, vma
, vma_link
);
3502 static int vma_add_mapping(struct mm_struct
*mm
, target_ulong start
,
3503 target_ulong end
, abi_ulong flags
)
3505 struct vm_area_struct
*vma
;
3507 if ((vma
= g_malloc0(sizeof (*vma
))) == NULL
)
3510 vma
->vma_start
= start
;
3512 vma
->vma_flags
= flags
;
3514 QTAILQ_INSERT_TAIL(&mm
->mm_mmap
, vma
, vma_link
);
3520 static struct vm_area_struct
*vma_first(const struct mm_struct
*mm
)
3522 return (QTAILQ_FIRST(&mm
->mm_mmap
));
3525 static struct vm_area_struct
*vma_next(struct vm_area_struct
*vma
)
3527 return (QTAILQ_NEXT(vma
, vma_link
));
3530 static int vma_get_mapping_count(const struct mm_struct
*mm
)
3532 return (mm
->mm_count
);
3536 * Calculate file (dump) size of given memory region.
3538 static abi_ulong
vma_dump_size(const struct vm_area_struct
*vma
)
3540 /* if we cannot even read the first page, skip it */
3541 if (!access_ok_untagged(VERIFY_READ
, vma
->vma_start
, TARGET_PAGE_SIZE
))
3545 * Usually we don't dump executable pages as they contain
3546 * non-writable code that debugger can read directly from
3547 * target library etc. However, thread stacks are marked
3548 * also executable so we read in first page of given region
3549 * and check whether it contains elf header. If there is
3550 * no elf header, we dump it.
3552 if (vma
->vma_flags
& PROT_EXEC
) {
3553 char page
[TARGET_PAGE_SIZE
];
3555 if (copy_from_user(page
, vma
->vma_start
, sizeof (page
))) {
3558 if ((page
[EI_MAG0
] == ELFMAG0
) &&
3559 (page
[EI_MAG1
] == ELFMAG1
) &&
3560 (page
[EI_MAG2
] == ELFMAG2
) &&
3561 (page
[EI_MAG3
] == ELFMAG3
)) {
3563 * Mappings are possibly from ELF binary. Don't dump
3570 return (vma
->vma_end
- vma
->vma_start
);
3573 static int vma_walker(void *priv
, target_ulong start
, target_ulong end
,
3574 unsigned long flags
)
3576 struct mm_struct
*mm
= (struct mm_struct
*)priv
;
3578 vma_add_mapping(mm
, start
, end
, flags
);
3582 static void fill_note(struct memelfnote
*note
, const char *name
, int type
,
3583 unsigned int sz
, void *data
)
3585 unsigned int namesz
;
3587 namesz
= strlen(name
) + 1;
3589 note
->namesz
= namesz
;
3590 note
->namesz_rounded
= roundup(namesz
, sizeof (int32_t));
3593 note
->datasz_rounded
= roundup(sz
, sizeof (int32_t));
3598 * We calculate rounded up note size here as specified by
3601 note
->notesz
= sizeof (struct elf_note
) +
3602 note
->namesz_rounded
+ note
->datasz_rounded
;
3605 static void fill_elf_header(struct elfhdr
*elf
, int segs
, uint16_t machine
,
3608 (void) memset(elf
, 0, sizeof(*elf
));
3610 (void) memcpy(elf
->e_ident
, ELFMAG
, SELFMAG
);
3611 elf
->e_ident
[EI_CLASS
] = ELF_CLASS
;
3612 elf
->e_ident
[EI_DATA
] = ELF_DATA
;
3613 elf
->e_ident
[EI_VERSION
] = EV_CURRENT
;
3614 elf
->e_ident
[EI_OSABI
] = ELF_OSABI
;
3616 elf
->e_type
= ET_CORE
;
3617 elf
->e_machine
= machine
;
3618 elf
->e_version
= EV_CURRENT
;
3619 elf
->e_phoff
= sizeof(struct elfhdr
);
3620 elf
->e_flags
= flags
;
3621 elf
->e_ehsize
= sizeof(struct elfhdr
);
3622 elf
->e_phentsize
= sizeof(struct elf_phdr
);
3623 elf
->e_phnum
= segs
;
3628 static void fill_elf_note_phdr(struct elf_phdr
*phdr
, int sz
, off_t offset
)
3630 phdr
->p_type
= PT_NOTE
;
3631 phdr
->p_offset
= offset
;
3634 phdr
->p_filesz
= sz
;
3639 bswap_phdr(phdr
, 1);
3642 static size_t note_size(const struct memelfnote
*note
)
3644 return (note
->notesz
);
3647 static void fill_prstatus(struct target_elf_prstatus
*prstatus
,
3648 const TaskState
*ts
, int signr
)
3650 (void) memset(prstatus
, 0, sizeof (*prstatus
));
3651 prstatus
->pr_info
.si_signo
= prstatus
->pr_cursig
= signr
;
3652 prstatus
->pr_pid
= ts
->ts_tid
;
3653 prstatus
->pr_ppid
= getppid();
3654 prstatus
->pr_pgrp
= getpgrp();
3655 prstatus
->pr_sid
= getsid(0);
3657 bswap_prstatus(prstatus
);
3660 static int fill_psinfo(struct target_elf_prpsinfo
*psinfo
, const TaskState
*ts
)
3662 char *base_filename
;
3663 unsigned int i
, len
;
3665 (void) memset(psinfo
, 0, sizeof (*psinfo
));
3667 len
= ts
->info
->env_strings
- ts
->info
->arg_strings
;
3668 if (len
>= ELF_PRARGSZ
)
3669 len
= ELF_PRARGSZ
- 1;
3670 if (copy_from_user(&psinfo
->pr_psargs
, ts
->info
->arg_strings
, len
)) {
3673 for (i
= 0; i
< len
; i
++)
3674 if (psinfo
->pr_psargs
[i
] == 0)
3675 psinfo
->pr_psargs
[i
] = ' ';
3676 psinfo
->pr_psargs
[len
] = 0;
3678 psinfo
->pr_pid
= getpid();
3679 psinfo
->pr_ppid
= getppid();
3680 psinfo
->pr_pgrp
= getpgrp();
3681 psinfo
->pr_sid
= getsid(0);
3682 psinfo
->pr_uid
= getuid();
3683 psinfo
->pr_gid
= getgid();
3685 base_filename
= g_path_get_basename(ts
->bprm
->filename
);
3687 * Using strncpy here is fine: at max-length,
3688 * this field is not NUL-terminated.
3690 (void) strncpy(psinfo
->pr_fname
, base_filename
,
3691 sizeof(psinfo
->pr_fname
));
3693 g_free(base_filename
);
3694 bswap_psinfo(psinfo
);
3698 static void fill_auxv_note(struct memelfnote
*note
, const TaskState
*ts
)
3700 elf_addr_t auxv
= (elf_addr_t
)ts
->info
->saved_auxv
;
3701 elf_addr_t orig_auxv
= auxv
;
3703 int len
= ts
->info
->auxv_len
;
3706 * Auxiliary vector is stored in target process stack. It contains
3707 * {type, value} pairs that we need to dump into note. This is not
3708 * strictly necessary but we do it here for sake of completeness.
3711 /* read in whole auxv vector and copy it to memelfnote */
3712 ptr
= lock_user(VERIFY_READ
, orig_auxv
, len
, 0);
3714 fill_note(note
, "CORE", NT_AUXV
, len
, ptr
);
3715 unlock_user(ptr
, auxv
, len
);
3720 * Constructs name of coredump file. We have following convention
3722 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
3724 * Returns the filename
3726 static char *core_dump_filename(const TaskState
*ts
)
3728 g_autoptr(GDateTime
) now
= g_date_time_new_now_local();
3729 g_autofree
char *nowstr
= g_date_time_format(now
, "%Y%m%d-%H%M%S");
3730 g_autofree
char *base_filename
= g_path_get_basename(ts
->bprm
->filename
);
3732 return g_strdup_printf("qemu_%s_%s_%d.core",
3733 base_filename
, nowstr
, (int)getpid());
3736 static int dump_write(int fd
, const void *ptr
, size_t size
)
3738 const char *bufp
= (const char *)ptr
;
3739 ssize_t bytes_written
, bytes_left
;
3740 struct rlimit dumpsize
;
3744 getrlimit(RLIMIT_CORE
, &dumpsize
);
3745 if ((pos
= lseek(fd
, 0, SEEK_CUR
))==-1) {
3746 if (errno
== ESPIPE
) { /* not a seekable stream */
3752 if (dumpsize
.rlim_cur
<= pos
) {
3754 } else if (dumpsize
.rlim_cur
== RLIM_INFINITY
) {
3757 size_t limit_left
=dumpsize
.rlim_cur
- pos
;
3758 bytes_left
= limit_left
>= size
? size
: limit_left
;
3763 * In normal conditions, single write(2) should do but
3764 * in case of socket etc. this mechanism is more portable.
3767 bytes_written
= write(fd
, bufp
, bytes_left
);
3768 if (bytes_written
< 0) {
3772 } else if (bytes_written
== 0) { /* eof */
3775 bufp
+= bytes_written
;
3776 bytes_left
-= bytes_written
;
3777 } while (bytes_left
> 0);
3782 static int write_note(struct memelfnote
*men
, int fd
)
3786 en
.n_namesz
= men
->namesz
;
3787 en
.n_type
= men
->type
;
3788 en
.n_descsz
= men
->datasz
;
3792 if (dump_write(fd
, &en
, sizeof(en
)) != 0)
3794 if (dump_write(fd
, men
->name
, men
->namesz_rounded
) != 0)
3796 if (dump_write(fd
, men
->data
, men
->datasz_rounded
) != 0)
3802 static void fill_thread_info(struct elf_note_info
*info
, const CPUArchState
*env
)
3804 CPUState
*cpu
= env_cpu((CPUArchState
*)env
);
3805 TaskState
*ts
= (TaskState
*)cpu
->opaque
;
3806 struct elf_thread_status
*ets
;
3808 ets
= g_malloc0(sizeof (*ets
));
3809 ets
->num_notes
= 1; /* only prstatus is dumped */
3810 fill_prstatus(&ets
->prstatus
, ts
, 0);
3811 elf_core_copy_regs(&ets
->prstatus
.pr_reg
, env
);
3812 fill_note(&ets
->notes
[0], "CORE", NT_PRSTATUS
, sizeof (ets
->prstatus
),
3815 QTAILQ_INSERT_TAIL(&info
->thread_list
, ets
, ets_link
);
3817 info
->notes_size
+= note_size(&ets
->notes
[0]);
3820 static void init_note_info(struct elf_note_info
*info
)
3822 /* Initialize the elf_note_info structure so that it is at
3823 * least safe to call free_note_info() on it. Must be
3824 * called before calling fill_note_info().
3826 memset(info
, 0, sizeof (*info
));
3827 QTAILQ_INIT(&info
->thread_list
);
3830 static int fill_note_info(struct elf_note_info
*info
,
3831 long signr
, const CPUArchState
*env
)
3834 CPUState
*cpu
= env_cpu((CPUArchState
*)env
);
3835 TaskState
*ts
= (TaskState
*)cpu
->opaque
;
3838 info
->notes
= g_new0(struct memelfnote
, NUMNOTES
);
3839 if (info
->notes
== NULL
)
3841 info
->prstatus
= g_malloc0(sizeof (*info
->prstatus
));
3842 if (info
->prstatus
== NULL
)
3844 info
->psinfo
= g_malloc0(sizeof (*info
->psinfo
));
3845 if (info
->prstatus
== NULL
)
3849 * First fill in status (and registers) of current thread
3850 * including process info & aux vector.
3852 fill_prstatus(info
->prstatus
, ts
, signr
);
3853 elf_core_copy_regs(&info
->prstatus
->pr_reg
, env
);
3854 fill_note(&info
->notes
[0], "CORE", NT_PRSTATUS
,
3855 sizeof (*info
->prstatus
), info
->prstatus
);
3856 fill_psinfo(info
->psinfo
, ts
);
3857 fill_note(&info
->notes
[1], "CORE", NT_PRPSINFO
,
3858 sizeof (*info
->psinfo
), info
->psinfo
);
3859 fill_auxv_note(&info
->notes
[2], ts
);
3862 info
->notes_size
= 0;
3863 for (i
= 0; i
< info
->numnote
; i
++)
3864 info
->notes_size
+= note_size(&info
->notes
[i
]);
3866 /* read and fill status of all threads */
3869 if (cpu
== thread_cpu
) {
3872 fill_thread_info(info
, (CPUArchState
*)cpu
->env_ptr
);
3879 static void free_note_info(struct elf_note_info
*info
)
3881 struct elf_thread_status
*ets
;
3883 while (!QTAILQ_EMPTY(&info
->thread_list
)) {
3884 ets
= QTAILQ_FIRST(&info
->thread_list
);
3885 QTAILQ_REMOVE(&info
->thread_list
, ets
, ets_link
);
3889 g_free(info
->prstatus
);
3890 g_free(info
->psinfo
);
3891 g_free(info
->notes
);
3894 static int write_note_info(struct elf_note_info
*info
, int fd
)
3896 struct elf_thread_status
*ets
;
3899 /* write prstatus, psinfo and auxv for current thread */
3900 for (i
= 0; i
< info
->numnote
; i
++)
3901 if ((error
= write_note(&info
->notes
[i
], fd
)) != 0)
3904 /* write prstatus for each thread */
3905 QTAILQ_FOREACH(ets
, &info
->thread_list
, ets_link
) {
3906 if ((error
= write_note(&ets
->notes
[0], fd
)) != 0)
3914 * Write out ELF coredump.
3916 * See documentation of ELF object file format in:
3917 * http://www.caldera.com/developers/devspecs/gabi41.pdf
3919 * Coredump format in linux is following:
3921 * 0 +----------------------+ \
3922 * | ELF header | ET_CORE |
3923 * +----------------------+ |
3924 * | ELF program headers | |--- headers
3925 * | - NOTE section | |
3926 * | - PT_LOAD sections | |
3927 * +----------------------+ /
3932 * +----------------------+ <-- aligned to target page
3933 * | Process memory dump |
3938 * +----------------------+
3940 * NT_PRSTATUS -> struct elf_prstatus (per thread)
3941 * NT_PRSINFO -> struct elf_prpsinfo
3942 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
3944 * Format follows System V format as close as possible. Current
3945 * version limitations are as follows:
3946 * - no floating point registers are dumped
3948 * Function returns 0 in case of success, negative errno otherwise.
3950 * TODO: make this work also during runtime: it should be
3951 * possible to force coredump from running process and then
3952 * continue processing. For example qemu could set up SIGUSR2
3953 * handler (provided that target process haven't registered
3954 * handler for that) that does the dump when signal is received.
3956 static int elf_core_dump(int signr
, const CPUArchState
*env
)
3958 const CPUState
*cpu
= env_cpu((CPUArchState
*)env
);
3959 const TaskState
*ts
= (const TaskState
*)cpu
->opaque
;
3960 struct vm_area_struct
*vma
= NULL
;
3961 g_autofree
char *corefile
= NULL
;
3962 struct elf_note_info info
;
3964 struct elf_phdr phdr
;
3965 struct rlimit dumpsize
;
3966 struct mm_struct
*mm
= NULL
;
3967 off_t offset
= 0, data_offset
= 0;
3971 init_note_info(&info
);
3974 getrlimit(RLIMIT_CORE
, &dumpsize
);
3975 if (dumpsize
.rlim_cur
== 0)
3978 corefile
= core_dump_filename(ts
);
3980 if ((fd
= open(corefile
, O_WRONLY
| O_CREAT
,
3981 S_IRUSR
|S_IWUSR
|S_IRGRP
|S_IROTH
)) < 0)
3985 * Walk through target process memory mappings and
3986 * set up structure containing this information. After
3987 * this point vma_xxx functions can be used.
3989 if ((mm
= vma_init()) == NULL
)
3992 walk_memory_regions(mm
, vma_walker
);
3993 segs
= vma_get_mapping_count(mm
);
3996 * Construct valid coredump ELF header. We also
3997 * add one more segment for notes.
3999 fill_elf_header(&elf
, segs
+ 1, ELF_MACHINE
, 0);
4000 if (dump_write(fd
, &elf
, sizeof (elf
)) != 0)
4003 /* fill in the in-memory version of notes */
4004 if (fill_note_info(&info
, signr
, env
) < 0)
4007 offset
+= sizeof (elf
); /* elf header */
4008 offset
+= (segs
+ 1) * sizeof (struct elf_phdr
); /* program headers */
4010 /* write out notes program header */
4011 fill_elf_note_phdr(&phdr
, info
.notes_size
, offset
);
4013 offset
+= info
.notes_size
;
4014 if (dump_write(fd
, &phdr
, sizeof (phdr
)) != 0)
4018 * ELF specification wants data to start at page boundary so
4021 data_offset
= offset
= roundup(offset
, ELF_EXEC_PAGESIZE
);
4024 * Write program headers for memory regions mapped in
4025 * the target process.
4027 for (vma
= vma_first(mm
); vma
!= NULL
; vma
= vma_next(vma
)) {
4028 (void) memset(&phdr
, 0, sizeof (phdr
));
4030 phdr
.p_type
= PT_LOAD
;
4031 phdr
.p_offset
= offset
;
4032 phdr
.p_vaddr
= vma
->vma_start
;
4034 phdr
.p_filesz
= vma_dump_size(vma
);
4035 offset
+= phdr
.p_filesz
;
4036 phdr
.p_memsz
= vma
->vma_end
- vma
->vma_start
;
4037 phdr
.p_flags
= vma
->vma_flags
& PROT_READ
? PF_R
: 0;
4038 if (vma
->vma_flags
& PROT_WRITE
)
4039 phdr
.p_flags
|= PF_W
;
4040 if (vma
->vma_flags
& PROT_EXEC
)
4041 phdr
.p_flags
|= PF_X
;
4042 phdr
.p_align
= ELF_EXEC_PAGESIZE
;
4044 bswap_phdr(&phdr
, 1);
4045 if (dump_write(fd
, &phdr
, sizeof(phdr
)) != 0) {
4051 * Next we write notes just after program headers. No
4052 * alignment needed here.
4054 if (write_note_info(&info
, fd
) < 0)
4057 /* align data to page boundary */
4058 if (lseek(fd
, data_offset
, SEEK_SET
) != data_offset
)
4062 * Finally we can dump process memory into corefile as well.
4064 for (vma
= vma_first(mm
); vma
!= NULL
; vma
= vma_next(vma
)) {
4068 end
= vma
->vma_start
+ vma_dump_size(vma
);
4070 for (addr
= vma
->vma_start
; addr
< end
;
4071 addr
+= TARGET_PAGE_SIZE
) {
4072 char page
[TARGET_PAGE_SIZE
];
4076 * Read in page from target process memory and
4077 * write it to coredump file.
4079 error
= copy_from_user(page
, addr
, sizeof (page
));
4081 (void) fprintf(stderr
, "unable to dump " TARGET_ABI_FMT_lx
"\n",
4086 if (dump_write(fd
, page
, TARGET_PAGE_SIZE
) < 0)
4092 free_note_info(&info
);
4101 #endif /* USE_ELF_CORE_DUMP */
4103 void do_init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
4105 init_thread(regs
, infop
);