1 /* This is the Linux kernel elf-loading code, ported into user space */
11 #include <sys/resource.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 descriptors
42 MMAP_PAGE_ZERO
= 0x0100000,
43 ADDR_COMPAT_LAYOUT
= 0x0200000,
44 READ_IMPLIES_EXEC
= 0x0400000,
45 ADDR_LIMIT_32BIT
= 0x0800000,
46 SHORT_INODE
= 0x1000000,
47 WHOLE_SECONDS
= 0x2000000,
48 STICKY_TIMEOUTS
= 0x4000000,
49 ADDR_LIMIT_3GB
= 0x8000000,
55 * These go in the low byte. Avoid using the top bit, it will
56 * conflict with error returns.
60 PER_LINUX_32BIT
= 0x0000 | ADDR_LIMIT_32BIT
,
61 PER_LINUX_FDPIC
= 0x0000 | FDPIC_FUNCPTRS
,
62 PER_SVR4
= 0x0001 | STICKY_TIMEOUTS
| MMAP_PAGE_ZERO
,
63 PER_SVR3
= 0x0002 | STICKY_TIMEOUTS
| SHORT_INODE
,
64 PER_SCOSVR3
= 0x0003 | STICKY_TIMEOUTS
|
65 WHOLE_SECONDS
| SHORT_INODE
,
66 PER_OSR5
= 0x0003 | STICKY_TIMEOUTS
| WHOLE_SECONDS
,
67 PER_WYSEV386
= 0x0004 | STICKY_TIMEOUTS
| SHORT_INODE
,
68 PER_ISCR4
= 0x0005 | STICKY_TIMEOUTS
,
70 PER_SUNOS
= 0x0006 | STICKY_TIMEOUTS
,
71 PER_XENIX
= 0x0007 | STICKY_TIMEOUTS
| SHORT_INODE
,
73 PER_LINUX32_3GB
= 0x0008 | ADDR_LIMIT_3GB
,
74 PER_IRIX32
= 0x0009 | STICKY_TIMEOUTS
,/* IRIX5 32-bit */
75 PER_IRIXN32
= 0x000a | STICKY_TIMEOUTS
,/* IRIX6 new 32-bit */
76 PER_IRIX64
= 0x000b | STICKY_TIMEOUTS
,/* IRIX6 64-bit */
78 PER_SOLARIS
= 0x000d | STICKY_TIMEOUTS
,
79 PER_UW7
= 0x000e | STICKY_TIMEOUTS
| MMAP_PAGE_ZERO
,
80 PER_OSF4
= 0x000f, /* OSF/1 v4 */
86 * Return the base personality without flags.
88 #define personality(pers) (pers & PER_MASK)
90 /* this flag is uneffective under linux too, should be deleted */
92 #define MAP_DENYWRITE 0
95 /* should probably go in elf.h */
100 typedef target_ulong target_elf_greg_t
;
102 typedef uint16_t target_uid_t
;
103 typedef uint16_t target_gid_t
;
105 typedef uint32_t target_uid_t
;
106 typedef uint32_t target_gid_t
;
108 typedef int32_t target_pid_t
;
112 #define ELF_PLATFORM get_elf_platform()
114 static const char *get_elf_platform(void)
116 static char elf_platform
[] = "i386";
117 int family
= (thread_env
->cpuid_version
>> 8) & 0xff;
121 elf_platform
[1] = '0' + family
;
125 #define ELF_HWCAP get_elf_hwcap()
127 static uint32_t get_elf_hwcap(void)
129 return thread_env
->cpuid_features
;
133 #define ELF_START_MMAP 0x2aaaaab000ULL
134 #define elf_check_arch(x) ( ((x) == ELF_ARCH) )
136 #define ELF_CLASS ELFCLASS64
137 #define ELF_DATA ELFDATA2LSB
138 #define ELF_ARCH EM_X86_64
140 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
143 regs
->rsp
= infop
->start_stack
;
144 regs
->rip
= infop
->entry
;
148 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
151 * Note that ELF_NREG should be 29 as there should be place for
152 * TRAPNO and ERR "registers" as well but linux doesn't dump
155 * See linux kernel: arch/x86/include/asm/elf.h
157 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUState
*env
)
159 (*regs
)[0] = env
->regs
[15];
160 (*regs
)[1] = env
->regs
[14];
161 (*regs
)[2] = env
->regs
[13];
162 (*regs
)[3] = env
->regs
[12];
163 (*regs
)[4] = env
->regs
[R_EBP
];
164 (*regs
)[5] = env
->regs
[R_EBX
];
165 (*regs
)[6] = env
->regs
[11];
166 (*regs
)[7] = env
->regs
[10];
167 (*regs
)[8] = env
->regs
[9];
168 (*regs
)[9] = env
->regs
[8];
169 (*regs
)[10] = env
->regs
[R_EAX
];
170 (*regs
)[11] = env
->regs
[R_ECX
];
171 (*regs
)[12] = env
->regs
[R_EDX
];
172 (*regs
)[13] = env
->regs
[R_ESI
];
173 (*regs
)[14] = env
->regs
[R_EDI
];
174 (*regs
)[15] = env
->regs
[R_EAX
]; /* XXX */
175 (*regs
)[16] = env
->eip
;
176 (*regs
)[17] = env
->segs
[R_CS
].selector
& 0xffff;
177 (*regs
)[18] = env
->eflags
;
178 (*regs
)[19] = env
->regs
[R_ESP
];
179 (*regs
)[20] = env
->segs
[R_SS
].selector
& 0xffff;
180 (*regs
)[21] = env
->segs
[R_FS
].selector
& 0xffff;
181 (*regs
)[22] = env
->segs
[R_GS
].selector
& 0xffff;
182 (*regs
)[23] = env
->segs
[R_DS
].selector
& 0xffff;
183 (*regs
)[24] = env
->segs
[R_ES
].selector
& 0xffff;
184 (*regs
)[25] = env
->segs
[R_FS
].selector
& 0xffff;
185 (*regs
)[26] = env
->segs
[R_GS
].selector
& 0xffff;
190 #define ELF_START_MMAP 0x80000000
193 * This is used to ensure we don't load something for the wrong architecture.
195 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
198 * These are used to set parameters in the core dumps.
200 #define ELF_CLASS ELFCLASS32
201 #define ELF_DATA ELFDATA2LSB
202 #define ELF_ARCH EM_386
204 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
206 regs
->esp
= infop
->start_stack
;
207 regs
->eip
= infop
->entry
;
209 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
210 starts %edx contains a pointer to a function which might be
211 registered using `atexit'. This provides a mean for the
212 dynamic linker to call DT_FINI functions for shared libraries
213 that have been loaded before the code runs.
215 A value of 0 tells we have no such handler. */
220 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
223 * Note that ELF_NREG should be 19 as there should be place for
224 * TRAPNO and ERR "registers" as well but linux doesn't dump
227 * See linux kernel: arch/x86/include/asm/elf.h
229 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUState
*env
)
231 (*regs
)[0] = env
->regs
[R_EBX
];
232 (*regs
)[1] = env
->regs
[R_ECX
];
233 (*regs
)[2] = env
->regs
[R_EDX
];
234 (*regs
)[3] = env
->regs
[R_ESI
];
235 (*regs
)[4] = env
->regs
[R_EDI
];
236 (*regs
)[5] = env
->regs
[R_EBP
];
237 (*regs
)[6] = env
->regs
[R_EAX
];
238 (*regs
)[7] = env
->segs
[R_DS
].selector
& 0xffff;
239 (*regs
)[8] = env
->segs
[R_ES
].selector
& 0xffff;
240 (*regs
)[9] = env
->segs
[R_FS
].selector
& 0xffff;
241 (*regs
)[10] = env
->segs
[R_GS
].selector
& 0xffff;
242 (*regs
)[11] = env
->regs
[R_EAX
]; /* XXX */
243 (*regs
)[12] = env
->eip
;
244 (*regs
)[13] = env
->segs
[R_CS
].selector
& 0xffff;
245 (*regs
)[14] = env
->eflags
;
246 (*regs
)[15] = env
->regs
[R_ESP
];
247 (*regs
)[16] = env
->segs
[R_SS
].selector
& 0xffff;
251 #define USE_ELF_CORE_DUMP
252 #define ELF_EXEC_PAGESIZE 4096
258 #define ELF_START_MMAP 0x80000000
260 #define elf_check_arch(x) ( (x) == EM_ARM )
262 #define ELF_CLASS ELFCLASS32
263 #ifdef TARGET_WORDS_BIGENDIAN
264 #define ELF_DATA ELFDATA2MSB
266 #define ELF_DATA ELFDATA2LSB
268 #define ELF_ARCH EM_ARM
270 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
272 abi_long stack
= infop
->start_stack
;
273 memset(regs
, 0, sizeof(*regs
));
274 regs
->ARM_cpsr
= 0x10;
275 if (infop
->entry
& 1)
276 regs
->ARM_cpsr
|= CPSR_T
;
277 regs
->ARM_pc
= infop
->entry
& 0xfffffffe;
278 regs
->ARM_sp
= infop
->start_stack
;
279 /* FIXME - what to for failure of get_user()? */
280 get_user_ual(regs
->ARM_r2
, stack
+ 8); /* envp */
281 get_user_ual(regs
->ARM_r1
, stack
+ 4); /* envp */
282 /* XXX: it seems that r0 is zeroed after ! */
284 /* For uClinux PIC binaries. */
285 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
286 regs
->ARM_r10
= infop
->start_data
;
290 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
292 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUState
*env
)
294 (*regs
)[0] = tswapl(env
->regs
[0]);
295 (*regs
)[1] = tswapl(env
->regs
[1]);
296 (*regs
)[2] = tswapl(env
->regs
[2]);
297 (*regs
)[3] = tswapl(env
->regs
[3]);
298 (*regs
)[4] = tswapl(env
->regs
[4]);
299 (*regs
)[5] = tswapl(env
->regs
[5]);
300 (*regs
)[6] = tswapl(env
->regs
[6]);
301 (*regs
)[7] = tswapl(env
->regs
[7]);
302 (*regs
)[8] = tswapl(env
->regs
[8]);
303 (*regs
)[9] = tswapl(env
->regs
[9]);
304 (*regs
)[10] = tswapl(env
->regs
[10]);
305 (*regs
)[11] = tswapl(env
->regs
[11]);
306 (*regs
)[12] = tswapl(env
->regs
[12]);
307 (*regs
)[13] = tswapl(env
->regs
[13]);
308 (*regs
)[14] = tswapl(env
->regs
[14]);
309 (*regs
)[15] = tswapl(env
->regs
[15]);
311 (*regs
)[16] = tswapl(cpsr_read((CPUState
*)env
));
312 (*regs
)[17] = tswapl(env
->regs
[0]); /* XXX */
315 #define USE_ELF_CORE_DUMP
316 #define ELF_EXEC_PAGESIZE 4096
320 ARM_HWCAP_ARM_SWP
= 1 << 0,
321 ARM_HWCAP_ARM_HALF
= 1 << 1,
322 ARM_HWCAP_ARM_THUMB
= 1 << 2,
323 ARM_HWCAP_ARM_26BIT
= 1 << 3,
324 ARM_HWCAP_ARM_FAST_MULT
= 1 << 4,
325 ARM_HWCAP_ARM_FPA
= 1 << 5,
326 ARM_HWCAP_ARM_VFP
= 1 << 6,
327 ARM_HWCAP_ARM_EDSP
= 1 << 7,
328 ARM_HWCAP_ARM_JAVA
= 1 << 8,
329 ARM_HWCAP_ARM_IWMMXT
= 1 << 9,
330 ARM_HWCAP_ARM_THUMBEE
= 1 << 10,
331 ARM_HWCAP_ARM_NEON
= 1 << 11,
332 ARM_HWCAP_ARM_VFPv3
= 1 << 12,
333 ARM_HWCAP_ARM_VFPv3D16
= 1 << 13,
336 #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
337 | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \
338 | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP \
339 | ARM_HWCAP_ARM_NEON | ARM_HWCAP_ARM_VFPv3 )
344 #ifdef TARGET_SPARC64
346 #define ELF_START_MMAP 0x80000000
349 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
351 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
354 #define ELF_CLASS ELFCLASS64
355 #define ELF_DATA ELFDATA2MSB
356 #define ELF_ARCH EM_SPARCV9
358 #define STACK_BIAS 2047
360 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
365 regs
->pc
= infop
->entry
;
366 regs
->npc
= regs
->pc
+ 4;
369 regs
->u_regs
[14] = infop
->start_stack
- 16 * 4;
371 if (personality(infop
->personality
) == PER_LINUX32
)
372 regs
->u_regs
[14] = infop
->start_stack
- 16 * 4;
374 regs
->u_regs
[14] = infop
->start_stack
- 16 * 8 - STACK_BIAS
;
379 #define ELF_START_MMAP 0x80000000
381 #define elf_check_arch(x) ( (x) == EM_SPARC )
383 #define ELF_CLASS ELFCLASS32
384 #define ELF_DATA ELFDATA2MSB
385 #define ELF_ARCH EM_SPARC
387 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
390 regs
->pc
= infop
->entry
;
391 regs
->npc
= regs
->pc
+ 4;
393 regs
->u_regs
[14] = infop
->start_stack
- 16 * 4;
401 #define ELF_START_MMAP 0x80000000
403 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
405 #define elf_check_arch(x) ( (x) == EM_PPC64 )
407 #define ELF_CLASS ELFCLASS64
411 #define elf_check_arch(x) ( (x) == EM_PPC )
413 #define ELF_CLASS ELFCLASS32
417 #ifdef TARGET_WORDS_BIGENDIAN
418 #define ELF_DATA ELFDATA2MSB
420 #define ELF_DATA ELFDATA2LSB
422 #define ELF_ARCH EM_PPC
424 /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
425 See arch/powerpc/include/asm/cputable.h. */
427 QEMU_PPC_FEATURE_32
= 0x80000000,
428 QEMU_PPC_FEATURE_64
= 0x40000000,
429 QEMU_PPC_FEATURE_601_INSTR
= 0x20000000,
430 QEMU_PPC_FEATURE_HAS_ALTIVEC
= 0x10000000,
431 QEMU_PPC_FEATURE_HAS_FPU
= 0x08000000,
432 QEMU_PPC_FEATURE_HAS_MMU
= 0x04000000,
433 QEMU_PPC_FEATURE_HAS_4xxMAC
= 0x02000000,
434 QEMU_PPC_FEATURE_UNIFIED_CACHE
= 0x01000000,
435 QEMU_PPC_FEATURE_HAS_SPE
= 0x00800000,
436 QEMU_PPC_FEATURE_HAS_EFP_SINGLE
= 0x00400000,
437 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE
= 0x00200000,
438 QEMU_PPC_FEATURE_NO_TB
= 0x00100000,
439 QEMU_PPC_FEATURE_POWER4
= 0x00080000,
440 QEMU_PPC_FEATURE_POWER5
= 0x00040000,
441 QEMU_PPC_FEATURE_POWER5_PLUS
= 0x00020000,
442 QEMU_PPC_FEATURE_CELL
= 0x00010000,
443 QEMU_PPC_FEATURE_BOOKE
= 0x00008000,
444 QEMU_PPC_FEATURE_SMT
= 0x00004000,
445 QEMU_PPC_FEATURE_ICACHE_SNOOP
= 0x00002000,
446 QEMU_PPC_FEATURE_ARCH_2_05
= 0x00001000,
447 QEMU_PPC_FEATURE_PA6T
= 0x00000800,
448 QEMU_PPC_FEATURE_HAS_DFP
= 0x00000400,
449 QEMU_PPC_FEATURE_POWER6_EXT
= 0x00000200,
450 QEMU_PPC_FEATURE_ARCH_2_06
= 0x00000100,
451 QEMU_PPC_FEATURE_HAS_VSX
= 0x00000080,
452 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT
= 0x00000040,
454 QEMU_PPC_FEATURE_TRUE_LE
= 0x00000002,
455 QEMU_PPC_FEATURE_PPC_LE
= 0x00000001,
458 #define ELF_HWCAP get_elf_hwcap()
460 static uint32_t get_elf_hwcap(void)
462 CPUState
*e
= thread_env
;
463 uint32_t features
= 0;
465 /* We don't have to be terribly complete here; the high points are
466 Altivec/FP/SPE support. Anything else is just a bonus. */
467 #define GET_FEATURE(flag, feature) \
468 do {if (e->insns_flags & flag) features |= feature; } while(0)
469 GET_FEATURE(PPC_64B
, QEMU_PPC_FEATURE_64
);
470 GET_FEATURE(PPC_FLOAT
, QEMU_PPC_FEATURE_HAS_FPU
);
471 GET_FEATURE(PPC_ALTIVEC
, QEMU_PPC_FEATURE_HAS_ALTIVEC
);
472 GET_FEATURE(PPC_SPE
, QEMU_PPC_FEATURE_HAS_SPE
);
473 GET_FEATURE(PPC_SPE_SINGLE
, QEMU_PPC_FEATURE_HAS_EFP_SINGLE
);
474 GET_FEATURE(PPC_SPE_DOUBLE
, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE
);
475 GET_FEATURE(PPC_BOOKE
, QEMU_PPC_FEATURE_BOOKE
);
476 GET_FEATURE(PPC_405_MAC
, QEMU_PPC_FEATURE_HAS_4xxMAC
);
483 * We need to put in some extra aux table entries to tell glibc what
484 * the cache block size is, so it can use the dcbz instruction safely.
486 #define AT_DCACHEBSIZE 19
487 #define AT_ICACHEBSIZE 20
488 #define AT_UCACHEBSIZE 21
489 /* A special ignored type value for PPC, for glibc compatibility. */
490 #define AT_IGNOREPPC 22
492 * The requirements here are:
493 * - keep the final alignment of sp (sp & 0xf)
494 * - make sure the 32-bit value at the first 16 byte aligned position of
495 * AUXV is greater than 16 for glibc compatibility.
496 * AT_IGNOREPPC is used for that.
497 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
498 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
500 #define DLINFO_ARCH_ITEMS 5
501 #define ARCH_DLINFO \
503 NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
504 NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
505 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
507 * Now handle glibc compatibility. \
509 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
510 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
513 static inline void init_thread(struct target_pt_regs
*_regs
, struct image_info
*infop
)
515 abi_ulong pos
= infop
->start_stack
;
517 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
518 abi_ulong entry
, toc
;
521 _regs
->gpr
[1] = infop
->start_stack
;
522 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
523 entry
= ldq_raw(infop
->entry
) + infop
->load_addr
;
524 toc
= ldq_raw(infop
->entry
+ 8) + infop
->load_addr
;
526 infop
->entry
= entry
;
528 _regs
->nip
= infop
->entry
;
529 /* Note that isn't exactly what regular kernel does
530 * but this is what the ABI wants and is needed to allow
531 * execution of PPC BSD programs.
533 /* FIXME - what to for failure of get_user()? */
534 get_user_ual(_regs
->gpr
[3], pos
);
535 pos
+= sizeof(abi_ulong
);
537 for (tmp
= 1; tmp
!= 0; pos
+= sizeof(abi_ulong
))
542 /* See linux kernel: arch/powerpc/include/asm/elf.h. */
544 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
546 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUState
*env
)
549 target_ulong ccr
= 0;
551 for (i
= 0; i
< ARRAY_SIZE(env
->gpr
); i
++) {
552 (*regs
)[i
] = tswapl(env
->gpr
[i
]);
555 (*regs
)[32] = tswapl(env
->nip
);
556 (*regs
)[33] = tswapl(env
->msr
);
557 (*regs
)[35] = tswapl(env
->ctr
);
558 (*regs
)[36] = tswapl(env
->lr
);
559 (*regs
)[37] = tswapl(env
->xer
);
561 for (i
= 0; i
< ARRAY_SIZE(env
->crf
); i
++) {
562 ccr
|= env
->crf
[i
] << (32 - ((i
+ 1) * 4));
564 (*regs
)[38] = tswapl(ccr
);
567 #define USE_ELF_CORE_DUMP
568 #define ELF_EXEC_PAGESIZE 4096
574 #define ELF_START_MMAP 0x80000000
576 #define elf_check_arch(x) ( (x) == EM_MIPS )
579 #define ELF_CLASS ELFCLASS64
581 #define ELF_CLASS ELFCLASS32
583 #ifdef TARGET_WORDS_BIGENDIAN
584 #define ELF_DATA ELFDATA2MSB
586 #define ELF_DATA ELFDATA2LSB
588 #define ELF_ARCH EM_MIPS
590 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
592 regs
->cp0_status
= 2 << CP0St_KSU
;
593 regs
->cp0_epc
= infop
->entry
;
594 regs
->regs
[29] = infop
->start_stack
;
597 /* See linux kernel: arch/mips/include/asm/elf.h. */
599 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
601 /* See linux kernel: arch/mips/include/asm/reg.h. */
608 TARGET_EF_R26
= TARGET_EF_R0
+ 26,
609 TARGET_EF_R27
= TARGET_EF_R0
+ 27,
610 TARGET_EF_LO
= TARGET_EF_R0
+ 32,
611 TARGET_EF_HI
= TARGET_EF_R0
+ 33,
612 TARGET_EF_CP0_EPC
= TARGET_EF_R0
+ 34,
613 TARGET_EF_CP0_BADVADDR
= TARGET_EF_R0
+ 35,
614 TARGET_EF_CP0_STATUS
= TARGET_EF_R0
+ 36,
615 TARGET_EF_CP0_CAUSE
= TARGET_EF_R0
+ 37
618 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
619 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUState
*env
)
623 for (i
= 0; i
< TARGET_EF_R0
; i
++) {
626 (*regs
)[TARGET_EF_R0
] = 0;
628 for (i
= 1; i
< ARRAY_SIZE(env
->active_tc
.gpr
); i
++) {
629 (*regs
)[TARGET_EF_R0
+ i
] = tswapl(env
->active_tc
.gpr
[i
]);
632 (*regs
)[TARGET_EF_R26
] = 0;
633 (*regs
)[TARGET_EF_R27
] = 0;
634 (*regs
)[TARGET_EF_LO
] = tswapl(env
->active_tc
.LO
[0]);
635 (*regs
)[TARGET_EF_HI
] = tswapl(env
->active_tc
.HI
[0]);
636 (*regs
)[TARGET_EF_CP0_EPC
] = tswapl(env
->active_tc
.PC
);
637 (*regs
)[TARGET_EF_CP0_BADVADDR
] = tswapl(env
->CP0_BadVAddr
);
638 (*regs
)[TARGET_EF_CP0_STATUS
] = tswapl(env
->CP0_Status
);
639 (*regs
)[TARGET_EF_CP0_CAUSE
] = tswapl(env
->CP0_Cause
);
642 #define USE_ELF_CORE_DUMP
643 #define ELF_EXEC_PAGESIZE 4096
645 #endif /* TARGET_MIPS */
647 #ifdef TARGET_MICROBLAZE
649 #define ELF_START_MMAP 0x80000000
651 #define elf_check_arch(x) ( (x) == EM_XILINX_MICROBLAZE )
653 #define ELF_CLASS ELFCLASS32
654 #define ELF_DATA ELFDATA2MSB
655 #define ELF_ARCH EM_XILINX_MICROBLAZE
657 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
659 regs
->pc
= infop
->entry
;
660 regs
->r1
= infop
->start_stack
;
664 #define ELF_EXEC_PAGESIZE 4096
666 #endif /* TARGET_MICROBLAZE */
670 #define ELF_START_MMAP 0x80000000
672 #define elf_check_arch(x) ( (x) == EM_SH )
674 #define ELF_CLASS ELFCLASS32
675 #define ELF_DATA ELFDATA2LSB
676 #define ELF_ARCH EM_SH
678 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
680 /* Check other registers XXXXX */
681 regs
->pc
= infop
->entry
;
682 regs
->regs
[15] = infop
->start_stack
;
685 /* See linux kernel: arch/sh/include/asm/elf.h. */
687 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
689 /* See linux kernel: arch/sh/include/asm/ptrace.h. */
695 TARGET_REG_MACH
= 20,
696 TARGET_REG_MACL
= 21,
697 TARGET_REG_SYSCALL
= 22
700 static inline void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUState
*env
)
704 for (i
= 0; i
< 16; i
++) {
705 (*regs
[i
]) = tswapl(env
->gregs
[i
]);
708 (*regs
)[TARGET_REG_PC
] = tswapl(env
->pc
);
709 (*regs
)[TARGET_REG_PR
] = tswapl(env
->pr
);
710 (*regs
)[TARGET_REG_SR
] = tswapl(env
->sr
);
711 (*regs
)[TARGET_REG_GBR
] = tswapl(env
->gbr
);
712 (*regs
)[TARGET_REG_MACH
] = tswapl(env
->mach
);
713 (*regs
)[TARGET_REG_MACL
] = tswapl(env
->macl
);
714 (*regs
)[TARGET_REG_SYSCALL
] = 0; /* FIXME */
717 #define USE_ELF_CORE_DUMP
718 #define ELF_EXEC_PAGESIZE 4096
724 #define ELF_START_MMAP 0x80000000
726 #define elf_check_arch(x) ( (x) == EM_CRIS )
728 #define ELF_CLASS ELFCLASS32
729 #define ELF_DATA ELFDATA2LSB
730 #define ELF_ARCH EM_CRIS
732 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
734 regs
->erp
= infop
->entry
;
737 #define ELF_EXEC_PAGESIZE 8192
743 #define ELF_START_MMAP 0x80000000
745 #define elf_check_arch(x) ( (x) == EM_68K )
747 #define ELF_CLASS ELFCLASS32
748 #define ELF_DATA ELFDATA2MSB
749 #define ELF_ARCH EM_68K
751 /* ??? Does this need to do anything?
752 #define ELF_PLAT_INIT(_r) */
754 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
756 regs
->usp
= infop
->start_stack
;
758 regs
->pc
= infop
->entry
;
761 /* See linux kernel: arch/m68k/include/asm/elf.h. */
763 typedef target_elf_greg_t target_elf_gregset_t
[ELF_NREG
];
765 static void elf_core_copy_regs(target_elf_gregset_t
*regs
, const CPUState
*env
)
767 (*regs
)[0] = tswapl(env
->dregs
[1]);
768 (*regs
)[1] = tswapl(env
->dregs
[2]);
769 (*regs
)[2] = tswapl(env
->dregs
[3]);
770 (*regs
)[3] = tswapl(env
->dregs
[4]);
771 (*regs
)[4] = tswapl(env
->dregs
[5]);
772 (*regs
)[5] = tswapl(env
->dregs
[6]);
773 (*regs
)[6] = tswapl(env
->dregs
[7]);
774 (*regs
)[7] = tswapl(env
->aregs
[0]);
775 (*regs
)[8] = tswapl(env
->aregs
[1]);
776 (*regs
)[9] = tswapl(env
->aregs
[2]);
777 (*regs
)[10] = tswapl(env
->aregs
[3]);
778 (*regs
)[11] = tswapl(env
->aregs
[4]);
779 (*regs
)[12] = tswapl(env
->aregs
[5]);
780 (*regs
)[13] = tswapl(env
->aregs
[6]);
781 (*regs
)[14] = tswapl(env
->dregs
[0]);
782 (*regs
)[15] = tswapl(env
->aregs
[7]);
783 (*regs
)[16] = tswapl(env
->dregs
[0]); /* FIXME: orig_d0 */
784 (*regs
)[17] = tswapl(env
->sr
);
785 (*regs
)[18] = tswapl(env
->pc
);
786 (*regs
)[19] = 0; /* FIXME: regs->format | regs->vector */
789 #define USE_ELF_CORE_DUMP
790 #define ELF_EXEC_PAGESIZE 8192
796 #define ELF_START_MMAP (0x30000000000ULL)
798 #define elf_check_arch(x) ( (x) == ELF_ARCH )
800 #define ELF_CLASS ELFCLASS64
801 #define ELF_DATA ELFDATA2MSB
802 #define ELF_ARCH EM_ALPHA
804 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
806 regs
->pc
= infop
->entry
;
808 regs
->usp
= infop
->start_stack
;
811 #define ELF_EXEC_PAGESIZE 8192
813 #endif /* TARGET_ALPHA */
816 #define ELF_PLATFORM (NULL)
825 #define ELF_CLASS ELFCLASS32
827 #define bswaptls(ptr) bswap32s(ptr)
834 unsigned int a_info
; /* Use macros N_MAGIC, etc for access */
835 unsigned int a_text
; /* length of text, in bytes */
836 unsigned int a_data
; /* length of data, in bytes */
837 unsigned int a_bss
; /* length of uninitialized data area, in bytes */
838 unsigned int a_syms
; /* length of symbol table data in file, in bytes */
839 unsigned int a_entry
; /* start address */
840 unsigned int a_trsize
; /* length of relocation info for text, in bytes */
841 unsigned int a_drsize
; /* length of relocation info for data, in bytes */
845 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
851 /* max code+data+bss space allocated to elf interpreter */
852 #define INTERP_MAP_SIZE (32 * 1024 * 1024)
854 /* max code+data+bss+brk space allocated to ET_DYN executables */
855 #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
857 /* Necessary parameters */
858 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
859 #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
860 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
862 #define INTERPRETER_NONE 0
863 #define INTERPRETER_AOUT 1
864 #define INTERPRETER_ELF 2
866 #define DLINFO_ITEMS 12
868 static inline void memcpy_fromfs(void * to
, const void * from
, unsigned long n
)
873 static int load_aout_interp(void * exptr
, int interp_fd
);
876 static void bswap_ehdr(struct elfhdr
*ehdr
)
878 bswap16s(&ehdr
->e_type
); /* Object file type */
879 bswap16s(&ehdr
->e_machine
); /* Architecture */
880 bswap32s(&ehdr
->e_version
); /* Object file version */
881 bswaptls(&ehdr
->e_entry
); /* Entry point virtual address */
882 bswaptls(&ehdr
->e_phoff
); /* Program header table file offset */
883 bswaptls(&ehdr
->e_shoff
); /* Section header table file offset */
884 bswap32s(&ehdr
->e_flags
); /* Processor-specific flags */
885 bswap16s(&ehdr
->e_ehsize
); /* ELF header size in bytes */
886 bswap16s(&ehdr
->e_phentsize
); /* Program header table entry size */
887 bswap16s(&ehdr
->e_phnum
); /* Program header table entry count */
888 bswap16s(&ehdr
->e_shentsize
); /* Section header table entry size */
889 bswap16s(&ehdr
->e_shnum
); /* Section header table entry count */
890 bswap16s(&ehdr
->e_shstrndx
); /* Section header string table index */
893 static void bswap_phdr(struct elf_phdr
*phdr
)
895 bswap32s(&phdr
->p_type
); /* Segment type */
896 bswaptls(&phdr
->p_offset
); /* Segment file offset */
897 bswaptls(&phdr
->p_vaddr
); /* Segment virtual address */
898 bswaptls(&phdr
->p_paddr
); /* Segment physical address */
899 bswaptls(&phdr
->p_filesz
); /* Segment size in file */
900 bswaptls(&phdr
->p_memsz
); /* Segment size in memory */
901 bswap32s(&phdr
->p_flags
); /* Segment flags */
902 bswaptls(&phdr
->p_align
); /* Segment alignment */
905 static void bswap_shdr(struct elf_shdr
*shdr
)
907 bswap32s(&shdr
->sh_name
);
908 bswap32s(&shdr
->sh_type
);
909 bswaptls(&shdr
->sh_flags
);
910 bswaptls(&shdr
->sh_addr
);
911 bswaptls(&shdr
->sh_offset
);
912 bswaptls(&shdr
->sh_size
);
913 bswap32s(&shdr
->sh_link
);
914 bswap32s(&shdr
->sh_info
);
915 bswaptls(&shdr
->sh_addralign
);
916 bswaptls(&shdr
->sh_entsize
);
919 static void bswap_sym(struct elf_sym
*sym
)
921 bswap32s(&sym
->st_name
);
922 bswaptls(&sym
->st_value
);
923 bswaptls(&sym
->st_size
);
924 bswap16s(&sym
->st_shndx
);
928 #ifdef USE_ELF_CORE_DUMP
929 static int elf_core_dump(int, const CPUState
*);
932 static void bswap_note(struct elf_note
*en
)
934 bswap32s(&en
->n_namesz
);
935 bswap32s(&en
->n_descsz
);
936 bswap32s(&en
->n_type
);
938 #endif /* BSWAP_NEEDED */
940 #endif /* USE_ELF_CORE_DUMP */
943 * 'copy_elf_strings()' copies argument/envelope strings from user
944 * memory to free pages in kernel mem. These are in a format ready
945 * to be put directly into the top of new user memory.
948 static abi_ulong
copy_elf_strings(int argc
,char ** argv
, void **page
,
951 char *tmp
, *tmp1
, *pag
= NULL
;
955 return 0; /* bullet-proofing */
960 fprintf(stderr
, "VFS: argc is wrong");
966 if (p
< len
) { /* this shouldn't happen - 128kB */
972 offset
= p
% TARGET_PAGE_SIZE
;
973 pag
= (char *)page
[p
/TARGET_PAGE_SIZE
];
975 pag
= (char *)malloc(TARGET_PAGE_SIZE
);
976 memset(pag
, 0, TARGET_PAGE_SIZE
);
977 page
[p
/TARGET_PAGE_SIZE
] = pag
;
982 if (len
== 0 || offset
== 0) {
983 *(pag
+ offset
) = *tmp
;
986 int bytes_to_copy
= (len
> offset
) ? offset
: len
;
987 tmp
-= bytes_to_copy
;
989 offset
-= bytes_to_copy
;
990 len
-= bytes_to_copy
;
991 memcpy_fromfs(pag
+ offset
, tmp
, bytes_to_copy
+ 1);
998 static abi_ulong
setup_arg_pages(abi_ulong p
, struct linux_binprm
*bprm
,
999 struct image_info
*info
)
1001 abi_ulong stack_base
, size
, error
;
1004 /* Create enough stack to hold everything. If we don't use
1005 * it for args, we'll use it for something else...
1007 size
= x86_stack_size
;
1008 if (size
< MAX_ARG_PAGES
*TARGET_PAGE_SIZE
)
1009 size
= MAX_ARG_PAGES
*TARGET_PAGE_SIZE
;
1010 error
= target_mmap(0,
1011 size
+ qemu_host_page_size
,
1012 PROT_READ
| PROT_WRITE
,
1013 MAP_PRIVATE
| MAP_ANONYMOUS
,
1019 /* we reserve one extra page at the top of the stack as guard */
1020 target_mprotect(error
+ size
, qemu_host_page_size
, PROT_NONE
);
1022 stack_base
= error
+ size
- MAX_ARG_PAGES
*TARGET_PAGE_SIZE
;
1025 for (i
= 0 ; i
< MAX_ARG_PAGES
; i
++) {
1026 if (bprm
->page
[i
]) {
1028 /* FIXME - check return value of memcpy_to_target() for failure */
1029 memcpy_to_target(stack_base
, bprm
->page
[i
], TARGET_PAGE_SIZE
);
1030 free(bprm
->page
[i
]);
1032 stack_base
+= TARGET_PAGE_SIZE
;
1037 static void set_brk(abi_ulong start
, abi_ulong end
)
1039 /* page-align the start and end addresses... */
1040 start
= HOST_PAGE_ALIGN(start
);
1041 end
= HOST_PAGE_ALIGN(end
);
1044 if(target_mmap(start
, end
- start
,
1045 PROT_READ
| PROT_WRITE
| PROT_EXEC
,
1046 MAP_FIXED
| MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0) == -1) {
1047 perror("cannot mmap brk");
1053 /* We need to explicitly zero any fractional pages after the data
1054 section (i.e. bss). This would contain the junk from the file that
1055 should not be in memory. */
1056 static void padzero(abi_ulong elf_bss
, abi_ulong last_bss
)
1060 if (elf_bss
>= last_bss
)
1063 /* XXX: this is really a hack : if the real host page size is
1064 smaller than the target page size, some pages after the end
1065 of the file may not be mapped. A better fix would be to
1066 patch target_mmap(), but it is more complicated as the file
1067 size must be known */
1068 if (qemu_real_host_page_size
< qemu_host_page_size
) {
1069 abi_ulong end_addr
, end_addr1
;
1070 end_addr1
= (elf_bss
+ qemu_real_host_page_size
- 1) &
1071 ~(qemu_real_host_page_size
- 1);
1072 end_addr
= HOST_PAGE_ALIGN(elf_bss
);
1073 if (end_addr1
< end_addr
) {
1074 mmap((void *)g2h(end_addr1
), end_addr
- end_addr1
,
1075 PROT_READ
|PROT_WRITE
|PROT_EXEC
,
1076 MAP_FIXED
|MAP_PRIVATE
|MAP_ANONYMOUS
, -1, 0);
1080 nbyte
= elf_bss
& (qemu_host_page_size
-1);
1082 nbyte
= qemu_host_page_size
- nbyte
;
1084 /* FIXME - what to do if put_user() fails? */
1085 put_user_u8(0, elf_bss
);
1092 static abi_ulong
create_elf_tables(abi_ulong p
, int argc
, int envc
,
1093 struct elfhdr
* exec
,
1094 abi_ulong load_addr
,
1095 abi_ulong load_bias
,
1096 abi_ulong interp_load_addr
, int ibcs
,
1097 struct image_info
*info
)
1101 abi_ulong u_platform
;
1102 const char *k_platform
;
1103 const int n
= sizeof(elf_addr_t
);
1107 k_platform
= ELF_PLATFORM
;
1109 size_t len
= strlen(k_platform
) + 1;
1110 sp
-= (len
+ n
- 1) & ~(n
- 1);
1112 /* FIXME - check return value of memcpy_to_target() for failure */
1113 memcpy_to_target(sp
, k_platform
, len
);
1116 * Force 16 byte _final_ alignment here for generality.
1118 sp
= sp
&~ (abi_ulong
)15;
1119 size
= (DLINFO_ITEMS
+ 1) * 2;
1122 #ifdef DLINFO_ARCH_ITEMS
1123 size
+= DLINFO_ARCH_ITEMS
* 2;
1125 size
+= envc
+ argc
+ 2;
1126 size
+= (!ibcs
? 3 : 1); /* argc itself */
1129 sp
-= 16 - (size
& 15);
1131 /* This is correct because Linux defines
1132 * elf_addr_t as Elf32_Off / Elf64_Off
1134 #define NEW_AUX_ENT(id, val) do { \
1135 sp -= n; put_user_ual(val, sp); \
1136 sp -= n; put_user_ual(id, sp); \
1139 NEW_AUX_ENT (AT_NULL
, 0);
1141 /* There must be exactly DLINFO_ITEMS entries here. */
1142 NEW_AUX_ENT(AT_PHDR
, (abi_ulong
)(load_addr
+ exec
->e_phoff
));
1143 NEW_AUX_ENT(AT_PHENT
, (abi_ulong
)(sizeof (struct elf_phdr
)));
1144 NEW_AUX_ENT(AT_PHNUM
, (abi_ulong
)(exec
->e_phnum
));
1145 NEW_AUX_ENT(AT_PAGESZ
, (abi_ulong
)(TARGET_PAGE_SIZE
));
1146 NEW_AUX_ENT(AT_BASE
, (abi_ulong
)(interp_load_addr
));
1147 NEW_AUX_ENT(AT_FLAGS
, (abi_ulong
)0);
1148 NEW_AUX_ENT(AT_ENTRY
, load_bias
+ exec
->e_entry
);
1149 NEW_AUX_ENT(AT_UID
, (abi_ulong
) getuid());
1150 NEW_AUX_ENT(AT_EUID
, (abi_ulong
) geteuid());
1151 NEW_AUX_ENT(AT_GID
, (abi_ulong
) getgid());
1152 NEW_AUX_ENT(AT_EGID
, (abi_ulong
) getegid());
1153 NEW_AUX_ENT(AT_HWCAP
, (abi_ulong
) ELF_HWCAP
);
1154 NEW_AUX_ENT(AT_CLKTCK
, (abi_ulong
) sysconf(_SC_CLK_TCK
));
1156 NEW_AUX_ENT(AT_PLATFORM
, u_platform
);
1159 * ARCH_DLINFO must come last so platform specific code can enforce
1160 * special alignment requirements on the AUXV if necessary (eg. PPC).
1166 info
->saved_auxv
= sp
;
1168 sp
= loader_build_argptr(envc
, argc
, sp
, p
, !ibcs
);
1173 static abi_ulong
load_elf_interp(struct elfhdr
* interp_elf_ex
,
1175 abi_ulong
*interp_load_addr
)
1177 struct elf_phdr
*elf_phdata
= NULL
;
1178 struct elf_phdr
*eppnt
;
1179 abi_ulong load_addr
= 0;
1180 int load_addr_set
= 0;
1182 abi_ulong last_bss
, elf_bss
;
1191 bswap_ehdr(interp_elf_ex
);
1193 /* First of all, some simple consistency checks */
1194 if ((interp_elf_ex
->e_type
!= ET_EXEC
&&
1195 interp_elf_ex
->e_type
!= ET_DYN
) ||
1196 !elf_check_arch(interp_elf_ex
->e_machine
)) {
1197 return ~((abi_ulong
)0UL);
1201 /* Now read in all of the header information */
1203 if (sizeof(struct elf_phdr
) * interp_elf_ex
->e_phnum
> TARGET_PAGE_SIZE
)
1204 return ~(abi_ulong
)0UL;
1206 elf_phdata
= (struct elf_phdr
*)
1207 malloc(sizeof(struct elf_phdr
) * interp_elf_ex
->e_phnum
);
1210 return ~((abi_ulong
)0UL);
1213 * If the size of this structure has changed, then punt, since
1214 * we will be doing the wrong thing.
1216 if (interp_elf_ex
->e_phentsize
!= sizeof(struct elf_phdr
)) {
1218 return ~((abi_ulong
)0UL);
1221 retval
= lseek(interpreter_fd
, interp_elf_ex
->e_phoff
, SEEK_SET
);
1223 retval
= read(interpreter_fd
,
1224 (char *) elf_phdata
,
1225 sizeof(struct elf_phdr
) * interp_elf_ex
->e_phnum
);
1228 perror("load_elf_interp");
1235 for (i
=0; i
<interp_elf_ex
->e_phnum
; i
++, eppnt
++) {
1240 if (interp_elf_ex
->e_type
== ET_DYN
) {
1241 /* in order to avoid hardcoding the interpreter load
1242 address in qemu, we allocate a big enough memory zone */
1243 error
= target_mmap(0, INTERP_MAP_SIZE
,
1244 PROT_NONE
, MAP_PRIVATE
| MAP_ANON
,
1255 for(i
=0; i
<interp_elf_ex
->e_phnum
; i
++, eppnt
++)
1256 if (eppnt
->p_type
== PT_LOAD
) {
1257 int elf_type
= MAP_PRIVATE
| MAP_DENYWRITE
;
1259 abi_ulong vaddr
= 0;
1262 if (eppnt
->p_flags
& PF_R
) elf_prot
= PROT_READ
;
1263 if (eppnt
->p_flags
& PF_W
) elf_prot
|= PROT_WRITE
;
1264 if (eppnt
->p_flags
& PF_X
) elf_prot
|= PROT_EXEC
;
1265 if (interp_elf_ex
->e_type
== ET_EXEC
|| load_addr_set
) {
1266 elf_type
|= MAP_FIXED
;
1267 vaddr
= eppnt
->p_vaddr
;
1269 error
= target_mmap(load_addr
+TARGET_ELF_PAGESTART(vaddr
),
1270 eppnt
->p_filesz
+ TARGET_ELF_PAGEOFFSET(eppnt
->p_vaddr
),
1274 eppnt
->p_offset
- TARGET_ELF_PAGEOFFSET(eppnt
->p_vaddr
));
1278 close(interpreter_fd
);
1280 return ~((abi_ulong
)0UL);
1283 if (!load_addr_set
&& interp_elf_ex
->e_type
== ET_DYN
) {
1289 * Find the end of the file mapping for this phdr, and keep
1290 * track of the largest address we see for this.
1292 k
= load_addr
+ eppnt
->p_vaddr
+ eppnt
->p_filesz
;
1293 if (k
> elf_bss
) elf_bss
= k
;
1296 * Do the same thing for the memory mapping - between
1297 * elf_bss and last_bss is the bss section.
1299 k
= load_addr
+ eppnt
->p_memsz
+ eppnt
->p_vaddr
;
1300 if (k
> last_bss
) last_bss
= k
;
1303 /* Now use mmap to map the library into memory. */
1305 close(interpreter_fd
);
1308 * Now fill out the bss section. First pad the last page up
1309 * to the page boundary, and then perform a mmap to make sure
1310 * that there are zeromapped pages up to and including the last
1313 padzero(elf_bss
, last_bss
);
1314 elf_bss
= TARGET_ELF_PAGESTART(elf_bss
+ qemu_host_page_size
- 1); /* What we have mapped so far */
1316 /* Map the last of the bss segment */
1317 if (last_bss
> elf_bss
) {
1318 target_mmap(elf_bss
, last_bss
-elf_bss
,
1319 PROT_READ
|PROT_WRITE
|PROT_EXEC
,
1320 MAP_FIXED
|MAP_PRIVATE
|MAP_ANONYMOUS
, -1, 0);
1324 *interp_load_addr
= load_addr
;
1325 return ((abi_ulong
) interp_elf_ex
->e_entry
) + load_addr
;
1328 static int symfind(const void *s0
, const void *s1
)
1330 struct elf_sym
*key
= (struct elf_sym
*)s0
;
1331 struct elf_sym
*sym
= (struct elf_sym
*)s1
;
1333 if (key
->st_value
< sym
->st_value
) {
1335 } else if (key
->st_value
>= sym
->st_value
+ sym
->st_size
) {
1341 static const char *lookup_symbolxx(struct syminfo
*s
, target_ulong orig_addr
)
1343 #if ELF_CLASS == ELFCLASS32
1344 struct elf_sym
*syms
= s
->disas_symtab
.elf32
;
1346 struct elf_sym
*syms
= s
->disas_symtab
.elf64
;
1351 struct elf_sym
*sym
;
1353 key
.st_value
= orig_addr
;
1355 sym
= bsearch(&key
, syms
, s
->disas_num_syms
, sizeof(*syms
), symfind
);
1357 return s
->disas_strtab
+ sym
->st_name
;
1363 /* FIXME: This should use elf_ops.h */
1364 static int symcmp(const void *s0
, const void *s1
)
1366 struct elf_sym
*sym0
= (struct elf_sym
*)s0
;
1367 struct elf_sym
*sym1
= (struct elf_sym
*)s1
;
1368 return (sym0
->st_value
< sym1
->st_value
)
1370 : ((sym0
->st_value
> sym1
->st_value
) ? 1 : 0);
1373 /* Best attempt to load symbols from this ELF object. */
1374 static void load_symbols(struct elfhdr
*hdr
, int fd
)
1376 unsigned int i
, nsyms
;
1377 struct elf_shdr sechdr
, symtab
, strtab
;
1380 struct elf_sym
*syms
;
1382 lseek(fd
, hdr
->e_shoff
, SEEK_SET
);
1383 for (i
= 0; i
< hdr
->e_shnum
; i
++) {
1384 if (read(fd
, &sechdr
, sizeof(sechdr
)) != sizeof(sechdr
))
1387 bswap_shdr(&sechdr
);
1389 if (sechdr
.sh_type
== SHT_SYMTAB
) {
1391 lseek(fd
, hdr
->e_shoff
1392 + sizeof(sechdr
) * sechdr
.sh_link
, SEEK_SET
);
1393 if (read(fd
, &strtab
, sizeof(strtab
))
1397 bswap_shdr(&strtab
);
1402 return; /* Shouldn't happen... */
1405 /* Now know where the strtab and symtab are. Snarf them. */
1406 s
= malloc(sizeof(*s
));
1407 syms
= malloc(symtab
.sh_size
);
1410 s
->disas_strtab
= strings
= malloc(strtab
.sh_size
);
1411 if (!s
->disas_strtab
)
1414 lseek(fd
, symtab
.sh_offset
, SEEK_SET
);
1415 if (read(fd
, syms
, symtab
.sh_size
) != symtab
.sh_size
)
1418 nsyms
= symtab
.sh_size
/ sizeof(struct elf_sym
);
1423 bswap_sym(syms
+ i
);
1425 // Throw away entries which we do not need.
1426 if (syms
[i
].st_shndx
== SHN_UNDEF
||
1427 syms
[i
].st_shndx
>= SHN_LORESERVE
||
1428 ELF_ST_TYPE(syms
[i
].st_info
) != STT_FUNC
) {
1431 syms
[i
] = syms
[nsyms
];
1435 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
1436 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
1437 syms
[i
].st_value
&= ~(target_ulong
)1;
1441 syms
= realloc(syms
, nsyms
* sizeof(*syms
));
1443 qsort(syms
, nsyms
, sizeof(*syms
), symcmp
);
1445 lseek(fd
, strtab
.sh_offset
, SEEK_SET
);
1446 if (read(fd
, strings
, strtab
.sh_size
) != strtab
.sh_size
)
1448 s
->disas_num_syms
= nsyms
;
1449 #if ELF_CLASS == ELFCLASS32
1450 s
->disas_symtab
.elf32
= syms
;
1451 s
->lookup_symbol
= (lookup_symbol_t
)lookup_symbolxx
;
1453 s
->disas_symtab
.elf64
= syms
;
1454 s
->lookup_symbol
= (lookup_symbol_t
)lookup_symbolxx
;
1460 int load_elf_binary(struct linux_binprm
* bprm
, struct target_pt_regs
* regs
,
1461 struct image_info
* info
)
1463 struct elfhdr elf_ex
;
1464 struct elfhdr interp_elf_ex
;
1465 struct exec interp_ex
;
1466 int interpreter_fd
= -1; /* avoid warning */
1467 abi_ulong load_addr
, load_bias
;
1468 int load_addr_set
= 0;
1469 unsigned int interpreter_type
= INTERPRETER_NONE
;
1470 unsigned char ibcs2_interpreter
;
1472 abi_ulong mapped_addr
;
1473 struct elf_phdr
* elf_ppnt
;
1474 struct elf_phdr
*elf_phdata
;
1475 abi_ulong elf_bss
, k
, elf_brk
;
1477 char * elf_interpreter
;
1478 abi_ulong elf_entry
, interp_load_addr
= 0;
1480 abi_ulong start_code
, end_code
, start_data
, end_data
;
1481 abi_ulong reloc_func_desc
= 0;
1482 abi_ulong elf_stack
;
1483 char passed_fileno
[6];
1485 ibcs2_interpreter
= 0;
1489 elf_ex
= *((struct elfhdr
*) bprm
->buf
); /* exec-header */
1491 bswap_ehdr(&elf_ex
);
1494 /* First of all, some simple consistency checks */
1495 if ((elf_ex
.e_type
!= ET_EXEC
&& elf_ex
.e_type
!= ET_DYN
) ||
1496 (! elf_check_arch(elf_ex
.e_machine
))) {
1500 bprm
->p
= copy_elf_strings(1, &bprm
->filename
, bprm
->page
, bprm
->p
);
1501 bprm
->p
= copy_elf_strings(bprm
->envc
,bprm
->envp
,bprm
->page
,bprm
->p
);
1502 bprm
->p
= copy_elf_strings(bprm
->argc
,bprm
->argv
,bprm
->page
,bprm
->p
);
1507 /* Now read in all of the header information */
1508 elf_phdata
= (struct elf_phdr
*)malloc(elf_ex
.e_phentsize
*elf_ex
.e_phnum
);
1509 if (elf_phdata
== NULL
) {
1513 retval
= lseek(bprm
->fd
, elf_ex
.e_phoff
, SEEK_SET
);
1515 retval
= read(bprm
->fd
, (char *) elf_phdata
,
1516 elf_ex
.e_phentsize
* elf_ex
.e_phnum
);
1520 perror("load_elf_binary");
1527 elf_ppnt
= elf_phdata
;
1528 for (i
=0; i
<elf_ex
.e_phnum
; i
++, elf_ppnt
++) {
1529 bswap_phdr(elf_ppnt
);
1532 elf_ppnt
= elf_phdata
;
1538 elf_stack
= ~((abi_ulong
)0UL);
1539 elf_interpreter
= NULL
;
1540 start_code
= ~((abi_ulong
)0UL);
1544 interp_ex
.a_info
= 0;
1546 for(i
=0;i
< elf_ex
.e_phnum
; i
++) {
1547 if (elf_ppnt
->p_type
== PT_INTERP
) {
1548 if ( elf_interpreter
!= NULL
)
1551 free(elf_interpreter
);
1556 /* This is the program interpreter used for
1557 * shared libraries - for now assume that this
1558 * is an a.out format binary
1561 elf_interpreter
= (char *)malloc(elf_ppnt
->p_filesz
);
1563 if (elf_interpreter
== NULL
) {
1569 retval
= lseek(bprm
->fd
, elf_ppnt
->p_offset
, SEEK_SET
);
1571 retval
= read(bprm
->fd
, elf_interpreter
, elf_ppnt
->p_filesz
);
1574 perror("load_elf_binary2");
1578 /* If the program interpreter is one of these two,
1579 then assume an iBCS2 image. Otherwise assume
1580 a native linux image. */
1582 /* JRP - Need to add X86 lib dir stuff here... */
1584 if (strcmp(elf_interpreter
,"/usr/lib/libc.so.1") == 0 ||
1585 strcmp(elf_interpreter
,"/usr/lib/ld.so.1") == 0) {
1586 ibcs2_interpreter
= 1;
1590 printf("Using ELF interpreter %s\n", path(elf_interpreter
));
1593 retval
= open(path(elf_interpreter
), O_RDONLY
);
1595 interpreter_fd
= retval
;
1598 perror(elf_interpreter
);
1600 /* retval = -errno; */
1605 retval
= lseek(interpreter_fd
, 0, SEEK_SET
);
1607 retval
= read(interpreter_fd
,bprm
->buf
,128);
1611 interp_ex
= *((struct exec
*) bprm
->buf
); /* aout exec-header */
1612 interp_elf_ex
= *((struct elfhdr
*) bprm
->buf
); /* elf exec-header */
1615 perror("load_elf_binary3");
1618 free(elf_interpreter
);
1626 /* Some simple consistency checks for the interpreter */
1627 if (elf_interpreter
){
1628 interpreter_type
= INTERPRETER_ELF
| INTERPRETER_AOUT
;
1630 /* Now figure out which format our binary is */
1631 if ((N_MAGIC(interp_ex
) != OMAGIC
) && (N_MAGIC(interp_ex
) != ZMAGIC
) &&
1632 (N_MAGIC(interp_ex
) != QMAGIC
)) {
1633 interpreter_type
= INTERPRETER_ELF
;
1636 if (interp_elf_ex
.e_ident
[0] != 0x7f ||
1637 strncmp((char *)&interp_elf_ex
.e_ident
[1], "ELF",3) != 0) {
1638 interpreter_type
&= ~INTERPRETER_ELF
;
1641 if (!interpreter_type
) {
1642 free(elf_interpreter
);
1649 /* OK, we are done with that, now set up the arg stuff,
1650 and then start this sucker up */
1655 if (interpreter_type
== INTERPRETER_AOUT
) {
1656 snprintf(passed_fileno
, sizeof(passed_fileno
), "%d", bprm
->fd
);
1657 passed_p
= passed_fileno
;
1659 if (elf_interpreter
) {
1660 bprm
->p
= copy_elf_strings(1,&passed_p
,bprm
->page
,bprm
->p
);
1665 if (elf_interpreter
) {
1666 free(elf_interpreter
);
1674 /* OK, This is the point of no return */
1677 info
->start_mmap
= (abi_ulong
)ELF_START_MMAP
;
1679 elf_entry
= (abi_ulong
) elf_ex
.e_entry
;
1681 #if defined(CONFIG_USE_GUEST_BASE)
1683 * In case where user has not explicitly set the guest_base, we
1684 * probe here that should we set it automatically.
1686 if (!have_guest_base
) {
1688 * Go through ELF program header table and find out whether
1689 * any of the segments drop below our current mmap_min_addr and
1690 * in that case set guest_base to corresponding address.
1692 for (i
= 0, elf_ppnt
= elf_phdata
; i
< elf_ex
.e_phnum
;
1694 if (elf_ppnt
->p_type
!= PT_LOAD
)
1696 if (HOST_PAGE_ALIGN(elf_ppnt
->p_vaddr
) < mmap_min_addr
) {
1697 guest_base
= HOST_PAGE_ALIGN(mmap_min_addr
);
1702 #endif /* CONFIG_USE_GUEST_BASE */
1704 /* Do this so that we can load the interpreter, if need be. We will
1705 change some of these later */
1707 bprm
->p
= setup_arg_pages(bprm
->p
, bprm
, info
);
1708 info
->start_stack
= bprm
->p
;
1710 /* Now we do a little grungy work by mmaping the ELF image into
1711 * the correct location in memory. At this point, we assume that
1712 * the image should be loaded at fixed address, not at a variable
1716 for(i
= 0, elf_ppnt
= elf_phdata
; i
< elf_ex
.e_phnum
; i
++, elf_ppnt
++) {
1721 if (elf_ppnt
->p_type
!= PT_LOAD
)
1724 if (elf_ppnt
->p_flags
& PF_R
) elf_prot
|= PROT_READ
;
1725 if (elf_ppnt
->p_flags
& PF_W
) elf_prot
|= PROT_WRITE
;
1726 if (elf_ppnt
->p_flags
& PF_X
) elf_prot
|= PROT_EXEC
;
1727 elf_flags
= MAP_PRIVATE
| MAP_DENYWRITE
;
1728 if (elf_ex
.e_type
== ET_EXEC
|| load_addr_set
) {
1729 elf_flags
|= MAP_FIXED
;
1730 } else if (elf_ex
.e_type
== ET_DYN
) {
1731 /* Try and get dynamic programs out of the way of the default mmap
1732 base, as well as whatever program they might try to exec. This
1733 is because the brk will follow the loader, and is not movable. */
1734 /* NOTE: for qemu, we do a big mmap to get enough space
1735 without hardcoding any address */
1736 error
= target_mmap(0, ET_DYN_MAP_SIZE
,
1737 PROT_NONE
, MAP_PRIVATE
| MAP_ANON
,
1743 load_bias
= TARGET_ELF_PAGESTART(error
- elf_ppnt
->p_vaddr
);
1746 error
= target_mmap(TARGET_ELF_PAGESTART(load_bias
+ elf_ppnt
->p_vaddr
),
1747 (elf_ppnt
->p_filesz
+
1748 TARGET_ELF_PAGEOFFSET(elf_ppnt
->p_vaddr
)),
1750 (MAP_FIXED
| MAP_PRIVATE
| MAP_DENYWRITE
),
1752 (elf_ppnt
->p_offset
-
1753 TARGET_ELF_PAGEOFFSET(elf_ppnt
->p_vaddr
)));
1759 #ifdef LOW_ELF_STACK
1760 if (TARGET_ELF_PAGESTART(elf_ppnt
->p_vaddr
) < elf_stack
)
1761 elf_stack
= TARGET_ELF_PAGESTART(elf_ppnt
->p_vaddr
);
1764 if (!load_addr_set
) {
1766 load_addr
= elf_ppnt
->p_vaddr
- elf_ppnt
->p_offset
;
1767 if (elf_ex
.e_type
== ET_DYN
) {
1768 load_bias
+= error
-
1769 TARGET_ELF_PAGESTART(load_bias
+ elf_ppnt
->p_vaddr
);
1770 load_addr
+= load_bias
;
1771 reloc_func_desc
= load_bias
;
1774 k
= elf_ppnt
->p_vaddr
;
1779 k
= elf_ppnt
->p_vaddr
+ elf_ppnt
->p_filesz
;
1782 if ((elf_ppnt
->p_flags
& PF_X
) && end_code
< k
)
1786 k
= elf_ppnt
->p_vaddr
+ elf_ppnt
->p_memsz
;
1787 if (k
> elf_brk
) elf_brk
= k
;
1790 elf_entry
+= load_bias
;
1791 elf_bss
+= load_bias
;
1792 elf_brk
+= load_bias
;
1793 start_code
+= load_bias
;
1794 end_code
+= load_bias
;
1795 start_data
+= load_bias
;
1796 end_data
+= load_bias
;
1798 if (elf_interpreter
) {
1799 if (interpreter_type
& 1) {
1800 elf_entry
= load_aout_interp(&interp_ex
, interpreter_fd
);
1802 else if (interpreter_type
& 2) {
1803 elf_entry
= load_elf_interp(&interp_elf_ex
, interpreter_fd
,
1806 reloc_func_desc
= interp_load_addr
;
1808 close(interpreter_fd
);
1809 free(elf_interpreter
);
1811 if (elf_entry
== ~((abi_ulong
)0UL)) {
1812 printf("Unable to load interpreter\n");
1821 if (qemu_log_enabled())
1822 load_symbols(&elf_ex
, bprm
->fd
);
1824 if (interpreter_type
!= INTERPRETER_AOUT
) close(bprm
->fd
);
1825 info
->personality
= (ibcs2_interpreter
? PER_SVR4
: PER_LINUX
);
1827 #ifdef LOW_ELF_STACK
1828 info
->start_stack
= bprm
->p
= elf_stack
- 4;
1830 bprm
->p
= create_elf_tables(bprm
->p
,
1834 load_addr
, load_bias
,
1836 (interpreter_type
== INTERPRETER_AOUT
? 0 : 1),
1838 info
->load_addr
= reloc_func_desc
;
1839 info
->start_brk
= info
->brk
= elf_brk
;
1840 info
->end_code
= end_code
;
1841 info
->start_code
= start_code
;
1842 info
->start_data
= start_data
;
1843 info
->end_data
= end_data
;
1844 info
->start_stack
= bprm
->p
;
1846 /* Calling set_brk effectively mmaps the pages that we need for the bss and break
1848 set_brk(elf_bss
, elf_brk
);
1850 padzero(elf_bss
, elf_brk
);
1853 printf("(start_brk) %x\n" , info
->start_brk
);
1854 printf("(end_code) %x\n" , info
->end_code
);
1855 printf("(start_code) %x\n" , info
->start_code
);
1856 printf("(end_data) %x\n" , info
->end_data
);
1857 printf("(start_stack) %x\n" , info
->start_stack
);
1858 printf("(brk) %x\n" , info
->brk
);
1861 if ( info
->personality
== PER_SVR4
)
1863 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
1864 and some applications "depend" upon this behavior.
1865 Since we do not have the power to recompile these, we
1866 emulate the SVr4 behavior. Sigh. */
1867 mapped_addr
= target_mmap(0, qemu_host_page_size
, PROT_READ
| PROT_EXEC
,
1868 MAP_FIXED
| MAP_PRIVATE
, -1, 0);
1871 info
->entry
= elf_entry
;
1873 #ifdef USE_ELF_CORE_DUMP
1874 bprm
->core_dump
= &elf_core_dump
;
1880 #ifdef USE_ELF_CORE_DUMP
1883 * Definitions to generate Intel SVR4-like core files.
1884 * These mostly have the same names as the SVR4 types with "target_elf_"
1885 * tacked on the front to prevent clashes with linux definitions,
1886 * and the typedef forms have been avoided. This is mostly like
1887 * the SVR4 structure, but more Linuxy, with things that Linux does
1888 * not support and which gdb doesn't really use excluded.
1890 * Fields we don't dump (their contents is zero) in linux-user qemu
1891 * are marked with XXX.
1893 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
1895 * Porting ELF coredump for target is (quite) simple process. First you
1896 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
1897 * the target resides):
1899 * #define USE_ELF_CORE_DUMP
1901 * Next you define type of register set used for dumping. ELF specification
1902 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
1904 * typedef <target_regtype> target_elf_greg_t;
1905 * #define ELF_NREG <number of registers>
1906 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
1908 * Last step is to implement target specific function that copies registers
1909 * from given cpu into just specified register set. Prototype is:
1911 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
1912 * const CPUState *env);
1915 * regs - copy register values into here (allocated and zeroed by caller)
1916 * env - copy registers from here
1918 * Example for ARM target is provided in this file.
1921 /* An ELF note in memory */
1925 size_t namesz_rounded
;
1932 struct target_elf_siginfo
{
1933 int si_signo
; /* signal number */
1934 int si_code
; /* extra code */
1935 int si_errno
; /* errno */
1938 struct target_elf_prstatus
{
1939 struct target_elf_siginfo pr_info
; /* Info associated with signal */
1940 short pr_cursig
; /* Current signal */
1941 target_ulong pr_sigpend
; /* XXX */
1942 target_ulong pr_sighold
; /* XXX */
1943 target_pid_t pr_pid
;
1944 target_pid_t pr_ppid
;
1945 target_pid_t pr_pgrp
;
1946 target_pid_t pr_sid
;
1947 struct target_timeval pr_utime
; /* XXX User time */
1948 struct target_timeval pr_stime
; /* XXX System time */
1949 struct target_timeval pr_cutime
; /* XXX Cumulative user time */
1950 struct target_timeval pr_cstime
; /* XXX Cumulative system time */
1951 target_elf_gregset_t pr_reg
; /* GP registers */
1952 int pr_fpvalid
; /* XXX */
1955 #define ELF_PRARGSZ (80) /* Number of chars for args */
1957 struct target_elf_prpsinfo
{
1958 char pr_state
; /* numeric process state */
1959 char pr_sname
; /* char for pr_state */
1960 char pr_zomb
; /* zombie */
1961 char pr_nice
; /* nice val */
1962 target_ulong pr_flag
; /* flags */
1963 target_uid_t pr_uid
;
1964 target_gid_t pr_gid
;
1965 target_pid_t pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
1967 char pr_fname
[16]; /* filename of executable */
1968 char pr_psargs
[ELF_PRARGSZ
]; /* initial part of arg list */
1971 /* Here is the structure in which status of each thread is captured. */
1972 struct elf_thread_status
{
1973 QTAILQ_ENTRY(elf_thread_status
) ets_link
;
1974 struct target_elf_prstatus prstatus
; /* NT_PRSTATUS */
1976 elf_fpregset_t fpu
; /* NT_PRFPREG */
1977 struct task_struct
*thread
;
1978 elf_fpxregset_t xfpu
; /* ELF_CORE_XFPREG_TYPE */
1980 struct memelfnote notes
[1];
1984 struct elf_note_info
{
1985 struct memelfnote
*notes
;
1986 struct target_elf_prstatus
*prstatus
; /* NT_PRSTATUS */
1987 struct target_elf_prpsinfo
*psinfo
; /* NT_PRPSINFO */
1989 QTAILQ_HEAD(thread_list_head
, elf_thread_status
) thread_list
;
1992 * Current version of ELF coredump doesn't support
1993 * dumping fp regs etc.
1995 elf_fpregset_t
*fpu
;
1996 elf_fpxregset_t
*xfpu
;
1997 int thread_status_size
;
2003 struct vm_area_struct
{
2004 abi_ulong vma_start
; /* start vaddr of memory region */
2005 abi_ulong vma_end
; /* end vaddr of memory region */
2006 abi_ulong vma_flags
; /* protection etc. flags for the region */
2007 QTAILQ_ENTRY(vm_area_struct
) vma_link
;
2011 QTAILQ_HEAD(, vm_area_struct
) mm_mmap
;
2012 int mm_count
; /* number of mappings */
2015 static struct mm_struct
*vma_init(void);
2016 static void vma_delete(struct mm_struct
*);
2017 static int vma_add_mapping(struct mm_struct
*, abi_ulong
,
2018 abi_ulong
, abi_ulong
);
2019 static int vma_get_mapping_count(const struct mm_struct
*);
2020 static struct vm_area_struct
*vma_first(const struct mm_struct
*);
2021 static struct vm_area_struct
*vma_next(struct vm_area_struct
*);
2022 static abi_ulong
vma_dump_size(const struct vm_area_struct
*);
2023 static int vma_walker(void *priv
, unsigned long start
, unsigned long end
,
2024 unsigned long flags
);
2026 static void fill_elf_header(struct elfhdr
*, int, uint16_t, uint32_t);
2027 static void fill_note(struct memelfnote
*, const char *, int,
2028 unsigned int, void *);
2029 static void fill_prstatus(struct target_elf_prstatus
*, const TaskState
*, int);
2030 static int fill_psinfo(struct target_elf_prpsinfo
*, const TaskState
*);
2031 static void fill_auxv_note(struct memelfnote
*, const TaskState
*);
2032 static void fill_elf_note_phdr(struct elf_phdr
*, int, off_t
);
2033 static size_t note_size(const struct memelfnote
*);
2034 static void free_note_info(struct elf_note_info
*);
2035 static int fill_note_info(struct elf_note_info
*, long, const CPUState
*);
2036 static void fill_thread_info(struct elf_note_info
*, const CPUState
*);
2037 static int core_dump_filename(const TaskState
*, char *, size_t);
2039 static int dump_write(int, const void *, size_t);
2040 static int write_note(struct memelfnote
*, int);
2041 static int write_note_info(struct elf_note_info
*, int);
2044 static void bswap_prstatus(struct target_elf_prstatus
*);
2045 static void bswap_psinfo(struct target_elf_prpsinfo
*);
2047 static void bswap_prstatus(struct target_elf_prstatus
*prstatus
)
2049 prstatus
->pr_info
.si_signo
= tswapl(prstatus
->pr_info
.si_signo
);
2050 prstatus
->pr_info
.si_code
= tswapl(prstatus
->pr_info
.si_code
);
2051 prstatus
->pr_info
.si_errno
= tswapl(prstatus
->pr_info
.si_errno
);
2052 prstatus
->pr_cursig
= tswap16(prstatus
->pr_cursig
);
2053 prstatus
->pr_sigpend
= tswapl(prstatus
->pr_sigpend
);
2054 prstatus
->pr_sighold
= tswapl(prstatus
->pr_sighold
);
2055 prstatus
->pr_pid
= tswap32(prstatus
->pr_pid
);
2056 prstatus
->pr_ppid
= tswap32(prstatus
->pr_ppid
);
2057 prstatus
->pr_pgrp
= tswap32(prstatus
->pr_pgrp
);
2058 prstatus
->pr_sid
= tswap32(prstatus
->pr_sid
);
2059 /* cpu times are not filled, so we skip them */
2060 /* regs should be in correct format already */
2061 prstatus
->pr_fpvalid
= tswap32(prstatus
->pr_fpvalid
);
2064 static void bswap_psinfo(struct target_elf_prpsinfo
*psinfo
)
2066 psinfo
->pr_flag
= tswapl(psinfo
->pr_flag
);
2067 psinfo
->pr_uid
= tswap16(psinfo
->pr_uid
);
2068 psinfo
->pr_gid
= tswap16(psinfo
->pr_gid
);
2069 psinfo
->pr_pid
= tswap32(psinfo
->pr_pid
);
2070 psinfo
->pr_ppid
= tswap32(psinfo
->pr_ppid
);
2071 psinfo
->pr_pgrp
= tswap32(psinfo
->pr_pgrp
);
2072 psinfo
->pr_sid
= tswap32(psinfo
->pr_sid
);
2074 #endif /* BSWAP_NEEDED */
2077 * Minimal support for linux memory regions. These are needed
2078 * when we are finding out what memory exactly belongs to
2079 * emulated process. No locks needed here, as long as
2080 * thread that received the signal is stopped.
2083 static struct mm_struct
*vma_init(void)
2085 struct mm_struct
*mm
;
2087 if ((mm
= qemu_malloc(sizeof (*mm
))) == NULL
)
2091 QTAILQ_INIT(&mm
->mm_mmap
);
2096 static void vma_delete(struct mm_struct
*mm
)
2098 struct vm_area_struct
*vma
;
2100 while ((vma
= vma_first(mm
)) != NULL
) {
2101 QTAILQ_REMOVE(&mm
->mm_mmap
, vma
, vma_link
);
2107 static int vma_add_mapping(struct mm_struct
*mm
, abi_ulong start
,
2108 abi_ulong end
, abi_ulong flags
)
2110 struct vm_area_struct
*vma
;
2112 if ((vma
= qemu_mallocz(sizeof (*vma
))) == NULL
)
2115 vma
->vma_start
= start
;
2117 vma
->vma_flags
= flags
;
2119 QTAILQ_INSERT_TAIL(&mm
->mm_mmap
, vma
, vma_link
);
2125 static struct vm_area_struct
*vma_first(const struct mm_struct
*mm
)
2127 return (QTAILQ_FIRST(&mm
->mm_mmap
));
2130 static struct vm_area_struct
*vma_next(struct vm_area_struct
*vma
)
2132 return (QTAILQ_NEXT(vma
, vma_link
));
2135 static int vma_get_mapping_count(const struct mm_struct
*mm
)
2137 return (mm
->mm_count
);
2141 * Calculate file (dump) size of given memory region.
2143 static abi_ulong
vma_dump_size(const struct vm_area_struct
*vma
)
2145 /* if we cannot even read the first page, skip it */
2146 if (!access_ok(VERIFY_READ
, vma
->vma_start
, TARGET_PAGE_SIZE
))
2150 * Usually we don't dump executable pages as they contain
2151 * non-writable code that debugger can read directly from
2152 * target library etc. However, thread stacks are marked
2153 * also executable so we read in first page of given region
2154 * and check whether it contains elf header. If there is
2155 * no elf header, we dump it.
2157 if (vma
->vma_flags
& PROT_EXEC
) {
2158 char page
[TARGET_PAGE_SIZE
];
2160 copy_from_user(page
, vma
->vma_start
, sizeof (page
));
2161 if ((page
[EI_MAG0
] == ELFMAG0
) &&
2162 (page
[EI_MAG1
] == ELFMAG1
) &&
2163 (page
[EI_MAG2
] == ELFMAG2
) &&
2164 (page
[EI_MAG3
] == ELFMAG3
)) {
2166 * Mappings are possibly from ELF binary. Don't dump
2173 return (vma
->vma_end
- vma
->vma_start
);
2176 static int vma_walker(void *priv
, unsigned long start
, unsigned long end
,
2177 unsigned long flags
)
2179 struct mm_struct
*mm
= (struct mm_struct
*)priv
;
2182 * Don't dump anything that qemu has reserved for internal use.
2184 if (flags
& PAGE_RESERVED
)
2187 vma_add_mapping(mm
, start
, end
, flags
);
2191 static void fill_note(struct memelfnote
*note
, const char *name
, int type
,
2192 unsigned int sz
, void *data
)
2194 unsigned int namesz
;
2196 namesz
= strlen(name
) + 1;
2198 note
->namesz
= namesz
;
2199 note
->namesz_rounded
= roundup(namesz
, sizeof (int32_t));
2201 note
->datasz
= roundup(sz
, sizeof (int32_t));;
2205 * We calculate rounded up note size here as specified by
2208 note
->notesz
= sizeof (struct elf_note
) +
2209 note
->namesz_rounded
+ note
->datasz
;
2212 static void fill_elf_header(struct elfhdr
*elf
, int segs
, uint16_t machine
,
2215 (void) memset(elf
, 0, sizeof(*elf
));
2217 (void) memcpy(elf
->e_ident
, ELFMAG
, SELFMAG
);
2218 elf
->e_ident
[EI_CLASS
] = ELF_CLASS
;
2219 elf
->e_ident
[EI_DATA
] = ELF_DATA
;
2220 elf
->e_ident
[EI_VERSION
] = EV_CURRENT
;
2221 elf
->e_ident
[EI_OSABI
] = ELF_OSABI
;
2223 elf
->e_type
= ET_CORE
;
2224 elf
->e_machine
= machine
;
2225 elf
->e_version
= EV_CURRENT
;
2226 elf
->e_phoff
= sizeof(struct elfhdr
);
2227 elf
->e_flags
= flags
;
2228 elf
->e_ehsize
= sizeof(struct elfhdr
);
2229 elf
->e_phentsize
= sizeof(struct elf_phdr
);
2230 elf
->e_phnum
= segs
;
2237 static void fill_elf_note_phdr(struct elf_phdr
*phdr
, int sz
, off_t offset
)
2239 phdr
->p_type
= PT_NOTE
;
2240 phdr
->p_offset
= offset
;
2243 phdr
->p_filesz
= sz
;
2253 static size_t note_size(const struct memelfnote
*note
)
2255 return (note
->notesz
);
2258 static void fill_prstatus(struct target_elf_prstatus
*prstatus
,
2259 const TaskState
*ts
, int signr
)
2261 (void) memset(prstatus
, 0, sizeof (*prstatus
));
2262 prstatus
->pr_info
.si_signo
= prstatus
->pr_cursig
= signr
;
2263 prstatus
->pr_pid
= ts
->ts_tid
;
2264 prstatus
->pr_ppid
= getppid();
2265 prstatus
->pr_pgrp
= getpgrp();
2266 prstatus
->pr_sid
= getsid(0);
2269 bswap_prstatus(prstatus
);
2273 static int fill_psinfo(struct target_elf_prpsinfo
*psinfo
, const TaskState
*ts
)
2275 char *filename
, *base_filename
;
2276 unsigned int i
, len
;
2278 (void) memset(psinfo
, 0, sizeof (*psinfo
));
2280 len
= ts
->info
->arg_end
- ts
->info
->arg_start
;
2281 if (len
>= ELF_PRARGSZ
)
2282 len
= ELF_PRARGSZ
- 1;
2283 if (copy_from_user(&psinfo
->pr_psargs
, ts
->info
->arg_start
, len
))
2285 for (i
= 0; i
< len
; i
++)
2286 if (psinfo
->pr_psargs
[i
] == 0)
2287 psinfo
->pr_psargs
[i
] = ' ';
2288 psinfo
->pr_psargs
[len
] = 0;
2290 psinfo
->pr_pid
= getpid();
2291 psinfo
->pr_ppid
= getppid();
2292 psinfo
->pr_pgrp
= getpgrp();
2293 psinfo
->pr_sid
= getsid(0);
2294 psinfo
->pr_uid
= getuid();
2295 psinfo
->pr_gid
= getgid();
2297 filename
= strdup(ts
->bprm
->filename
);
2298 base_filename
= strdup(basename(filename
));
2299 (void) strncpy(psinfo
->pr_fname
, base_filename
,
2300 sizeof(psinfo
->pr_fname
));
2301 free(base_filename
);
2305 bswap_psinfo(psinfo
);
2310 static void fill_auxv_note(struct memelfnote
*note
, const TaskState
*ts
)
2312 elf_addr_t auxv
= (elf_addr_t
)ts
->info
->saved_auxv
;
2313 elf_addr_t orig_auxv
= auxv
;
2319 * Auxiliary vector is stored in target process stack. It contains
2320 * {type, value} pairs that we need to dump into note. This is not
2321 * strictly necessary but we do it here for sake of completeness.
2324 /* find out lenght of the vector, AT_NULL is terminator */
2327 get_user_ual(val
, auxv
);
2329 auxv
+= 2 * sizeof (elf_addr_t
);
2330 } while (val
!= AT_NULL
);
2331 len
= i
* sizeof (elf_addr_t
);
2333 /* read in whole auxv vector and copy it to memelfnote */
2334 ptr
= lock_user(VERIFY_READ
, orig_auxv
, len
, 0);
2336 fill_note(note
, "CORE", NT_AUXV
, len
, ptr
);
2337 unlock_user(ptr
, auxv
, len
);
2342 * Constructs name of coredump file. We have following convention
2344 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
2346 * Returns 0 in case of success, -1 otherwise (errno is set).
2348 static int core_dump_filename(const TaskState
*ts
, char *buf
,
2352 char *filename
= NULL
;
2353 char *base_filename
= NULL
;
2357 assert(bufsize
>= PATH_MAX
);
2359 if (gettimeofday(&tv
, NULL
) < 0) {
2360 (void) fprintf(stderr
, "unable to get current timestamp: %s",
2365 filename
= strdup(ts
->bprm
->filename
);
2366 base_filename
= strdup(basename(filename
));
2367 (void) strftime(timestamp
, sizeof (timestamp
), "%Y%m%d-%H%M%S",
2368 localtime_r(&tv
.tv_sec
, &tm
));
2369 (void) snprintf(buf
, bufsize
, "qemu_%s_%s_%d.core",
2370 base_filename
, timestamp
, (int)getpid());
2371 free(base_filename
);
2377 static int dump_write(int fd
, const void *ptr
, size_t size
)
2379 const char *bufp
= (const char *)ptr
;
2380 ssize_t bytes_written
, bytes_left
;
2381 struct rlimit dumpsize
;
2385 getrlimit(RLIMIT_CORE
, &dumpsize
);
2386 if ((pos
= lseek(fd
, 0, SEEK_CUR
))==-1) {
2387 if (errno
== ESPIPE
) { /* not a seekable stream */
2393 if (dumpsize
.rlim_cur
<= pos
) {
2395 } else if (dumpsize
.rlim_cur
== RLIM_INFINITY
) {
2398 size_t limit_left
=dumpsize
.rlim_cur
- pos
;
2399 bytes_left
= limit_left
>= size
? size
: limit_left
;
2404 * In normal conditions, single write(2) should do but
2405 * in case of socket etc. this mechanism is more portable.
2408 bytes_written
= write(fd
, bufp
, bytes_left
);
2409 if (bytes_written
< 0) {
2413 } else if (bytes_written
== 0) { /* eof */
2416 bufp
+= bytes_written
;
2417 bytes_left
-= bytes_written
;
2418 } while (bytes_left
> 0);
2423 static int write_note(struct memelfnote
*men
, int fd
)
2427 en
.n_namesz
= men
->namesz
;
2428 en
.n_type
= men
->type
;
2429 en
.n_descsz
= men
->datasz
;
2435 if (dump_write(fd
, &en
, sizeof(en
)) != 0)
2437 if (dump_write(fd
, men
->name
, men
->namesz_rounded
) != 0)
2439 if (dump_write(fd
, men
->data
, men
->datasz
) != 0)
2445 static void fill_thread_info(struct elf_note_info
*info
, const CPUState
*env
)
2447 TaskState
*ts
= (TaskState
*)env
->opaque
;
2448 struct elf_thread_status
*ets
;
2450 ets
= qemu_mallocz(sizeof (*ets
));
2451 ets
->num_notes
= 1; /* only prstatus is dumped */
2452 fill_prstatus(&ets
->prstatus
, ts
, 0);
2453 elf_core_copy_regs(&ets
->prstatus
.pr_reg
, env
);
2454 fill_note(&ets
->notes
[0], "CORE", NT_PRSTATUS
, sizeof (ets
->prstatus
),
2457 QTAILQ_INSERT_TAIL(&info
->thread_list
, ets
, ets_link
);
2459 info
->notes_size
+= note_size(&ets
->notes
[0]);
2462 static int fill_note_info(struct elf_note_info
*info
,
2463 long signr
, const CPUState
*env
)
2466 CPUState
*cpu
= NULL
;
2467 TaskState
*ts
= (TaskState
*)env
->opaque
;
2470 (void) memset(info
, 0, sizeof (*info
));
2472 QTAILQ_INIT(&info
->thread_list
);
2474 info
->notes
= qemu_mallocz(NUMNOTES
* sizeof (struct memelfnote
));
2475 if (info
->notes
== NULL
)
2477 info
->prstatus
= qemu_mallocz(sizeof (*info
->prstatus
));
2478 if (info
->prstatus
== NULL
)
2480 info
->psinfo
= qemu_mallocz(sizeof (*info
->psinfo
));
2481 if (info
->prstatus
== NULL
)
2485 * First fill in status (and registers) of current thread
2486 * including process info & aux vector.
2488 fill_prstatus(info
->prstatus
, ts
, signr
);
2489 elf_core_copy_regs(&info
->prstatus
->pr_reg
, env
);
2490 fill_note(&info
->notes
[0], "CORE", NT_PRSTATUS
,
2491 sizeof (*info
->prstatus
), info
->prstatus
);
2492 fill_psinfo(info
->psinfo
, ts
);
2493 fill_note(&info
->notes
[1], "CORE", NT_PRPSINFO
,
2494 sizeof (*info
->psinfo
), info
->psinfo
);
2495 fill_auxv_note(&info
->notes
[2], ts
);
2498 info
->notes_size
= 0;
2499 for (i
= 0; i
< info
->numnote
; i
++)
2500 info
->notes_size
+= note_size(&info
->notes
[i
]);
2502 /* read and fill status of all threads */
2504 for (cpu
= first_cpu
; cpu
!= NULL
; cpu
= cpu
->next_cpu
) {
2505 if (cpu
== thread_env
)
2507 fill_thread_info(info
, cpu
);
2514 static void free_note_info(struct elf_note_info
*info
)
2516 struct elf_thread_status
*ets
;
2518 while (!QTAILQ_EMPTY(&info
->thread_list
)) {
2519 ets
= QTAILQ_FIRST(&info
->thread_list
);
2520 QTAILQ_REMOVE(&info
->thread_list
, ets
, ets_link
);
2524 qemu_free(info
->prstatus
);
2525 qemu_free(info
->psinfo
);
2526 qemu_free(info
->notes
);
2529 static int write_note_info(struct elf_note_info
*info
, int fd
)
2531 struct elf_thread_status
*ets
;
2534 /* write prstatus, psinfo and auxv for current thread */
2535 for (i
= 0; i
< info
->numnote
; i
++)
2536 if ((error
= write_note(&info
->notes
[i
], fd
)) != 0)
2539 /* write prstatus for each thread */
2540 for (ets
= info
->thread_list
.tqh_first
; ets
!= NULL
;
2541 ets
= ets
->ets_link
.tqe_next
) {
2542 if ((error
= write_note(&ets
->notes
[0], fd
)) != 0)
2550 * Write out ELF coredump.
2552 * See documentation of ELF object file format in:
2553 * http://www.caldera.com/developers/devspecs/gabi41.pdf
2555 * Coredump format in linux is following:
2557 * 0 +----------------------+ \
2558 * | ELF header | ET_CORE |
2559 * +----------------------+ |
2560 * | ELF program headers | |--- headers
2561 * | - NOTE section | |
2562 * | - PT_LOAD sections | |
2563 * +----------------------+ /
2568 * +----------------------+ <-- aligned to target page
2569 * | Process memory dump |
2574 * +----------------------+
2576 * NT_PRSTATUS -> struct elf_prstatus (per thread)
2577 * NT_PRSINFO -> struct elf_prpsinfo
2578 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
2580 * Format follows System V format as close as possible. Current
2581 * version limitations are as follows:
2582 * - no floating point registers are dumped
2584 * Function returns 0 in case of success, negative errno otherwise.
2586 * TODO: make this work also during runtime: it should be
2587 * possible to force coredump from running process and then
2588 * continue processing. For example qemu could set up SIGUSR2
2589 * handler (provided that target process haven't registered
2590 * handler for that) that does the dump when signal is received.
2592 static int elf_core_dump(int signr
, const CPUState
*env
)
2594 const TaskState
*ts
= (const TaskState
*)env
->opaque
;
2595 struct vm_area_struct
*vma
= NULL
;
2596 char corefile
[PATH_MAX
];
2597 struct elf_note_info info
;
2599 struct elf_phdr phdr
;
2600 struct rlimit dumpsize
;
2601 struct mm_struct
*mm
= NULL
;
2602 off_t offset
= 0, data_offset
= 0;
2607 getrlimit(RLIMIT_CORE
, &dumpsize
);
2608 if (dumpsize
.rlim_cur
== 0)
2611 if (core_dump_filename(ts
, corefile
, sizeof (corefile
)) < 0)
2614 if ((fd
= open(corefile
, O_WRONLY
| O_CREAT
,
2615 S_IRUSR
|S_IWUSR
|S_IRGRP
|S_IROTH
)) < 0)
2619 * Walk through target process memory mappings and
2620 * set up structure containing this information. After
2621 * this point vma_xxx functions can be used.
2623 if ((mm
= vma_init()) == NULL
)
2626 walk_memory_regions(mm
, vma_walker
);
2627 segs
= vma_get_mapping_count(mm
);
2630 * Construct valid coredump ELF header. We also
2631 * add one more segment for notes.
2633 fill_elf_header(&elf
, segs
+ 1, ELF_MACHINE
, 0);
2634 if (dump_write(fd
, &elf
, sizeof (elf
)) != 0)
2637 /* fill in in-memory version of notes */
2638 if (fill_note_info(&info
, signr
, env
) < 0)
2641 offset
+= sizeof (elf
); /* elf header */
2642 offset
+= (segs
+ 1) * sizeof (struct elf_phdr
); /* program headers */
2644 /* write out notes program header */
2645 fill_elf_note_phdr(&phdr
, info
.notes_size
, offset
);
2647 offset
+= info
.notes_size
;
2648 if (dump_write(fd
, &phdr
, sizeof (phdr
)) != 0)
2652 * ELF specification wants data to start at page boundary so
2655 offset
= roundup(offset
, ELF_EXEC_PAGESIZE
);
2658 * Write program headers for memory regions mapped in
2659 * the target process.
2661 for (vma
= vma_first(mm
); vma
!= NULL
; vma
= vma_next(vma
)) {
2662 (void) memset(&phdr
, 0, sizeof (phdr
));
2664 phdr
.p_type
= PT_LOAD
;
2665 phdr
.p_offset
= offset
;
2666 phdr
.p_vaddr
= vma
->vma_start
;
2668 phdr
.p_filesz
= vma_dump_size(vma
);
2669 offset
+= phdr
.p_filesz
;
2670 phdr
.p_memsz
= vma
->vma_end
- vma
->vma_start
;
2671 phdr
.p_flags
= vma
->vma_flags
& PROT_READ
? PF_R
: 0;
2672 if (vma
->vma_flags
& PROT_WRITE
)
2673 phdr
.p_flags
|= PF_W
;
2674 if (vma
->vma_flags
& PROT_EXEC
)
2675 phdr
.p_flags
|= PF_X
;
2676 phdr
.p_align
= ELF_EXEC_PAGESIZE
;
2678 dump_write(fd
, &phdr
, sizeof (phdr
));
2682 * Next we write notes just after program headers. No
2683 * alignment needed here.
2685 if (write_note_info(&info
, fd
) < 0)
2688 /* align data to page boundary */
2689 data_offset
= lseek(fd
, 0, SEEK_CUR
);
2690 data_offset
= TARGET_PAGE_ALIGN(data_offset
);
2691 if (lseek(fd
, data_offset
, SEEK_SET
) != data_offset
)
2695 * Finally we can dump process memory into corefile as well.
2697 for (vma
= vma_first(mm
); vma
!= NULL
; vma
= vma_next(vma
)) {
2701 end
= vma
->vma_start
+ vma_dump_size(vma
);
2703 for (addr
= vma
->vma_start
; addr
< end
;
2704 addr
+= TARGET_PAGE_SIZE
) {
2705 char page
[TARGET_PAGE_SIZE
];
2709 * Read in page from target process memory and
2710 * write it to coredump file.
2712 error
= copy_from_user(page
, addr
, sizeof (page
));
2714 (void) fprintf(stderr
, "unable to dump " TARGET_ABI_FMT_lx
"\n",
2719 if (dump_write(fd
, page
, TARGET_PAGE_SIZE
) < 0)
2725 free_note_info(&info
);
2735 #endif /* USE_ELF_CORE_DUMP */
2737 static int load_aout_interp(void * exptr
, int interp_fd
)
2739 printf("a.out interpreter not yet supported\n");
2743 void do_init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
2745 init_thread(regs
, infop
);