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 */
102 #define ELF_PLATFORM get_elf_platform()
104 static const char *get_elf_platform(void)
106 static char elf_platform
[] = "i386";
107 int family
= (thread_env
->cpuid_version
>> 8) & 0xff;
111 elf_platform
[1] = '0' + family
;
115 #define ELF_HWCAP get_elf_hwcap()
117 static uint32_t get_elf_hwcap(void)
119 return thread_env
->cpuid_features
;
123 #define ELF_START_MMAP 0x2aaaaab000ULL
124 #define elf_check_arch(x) ( ((x) == ELF_ARCH) )
126 #define ELF_CLASS ELFCLASS64
127 #define ELF_DATA ELFDATA2LSB
128 #define ELF_ARCH EM_X86_64
130 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
133 regs
->rsp
= infop
->start_stack
;
134 regs
->rip
= infop
->entry
;
137 typedef target_ulong elf_greg_t
;
138 typedef uint32_t target_uid_t
;
139 typedef uint32_t target_gid_t
;
140 typedef int32_t target_pid_t
;
143 typedef elf_greg_t elf_gregset_t
[ELF_NREG
];
146 * Note that ELF_NREG should be 29 as there should be place for
147 * TRAPNO and ERR "registers" as well but linux doesn't dump
150 * See linux kernel: arch/x86/include/asm/elf.h
152 static void elf_core_copy_regs(elf_gregset_t
*regs
, const CPUState
*env
)
154 (*regs
)[0] = env
->regs
[15];
155 (*regs
)[1] = env
->regs
[14];
156 (*regs
)[2] = env
->regs
[13];
157 (*regs
)[3] = env
->regs
[12];
158 (*regs
)[4] = env
->regs
[R_EBP
];
159 (*regs
)[5] = env
->regs
[R_EBX
];
160 (*regs
)[6] = env
->regs
[11];
161 (*regs
)[7] = env
->regs
[10];
162 (*regs
)[8] = env
->regs
[9];
163 (*regs
)[9] = env
->regs
[8];
164 (*regs
)[10] = env
->regs
[R_EAX
];
165 (*regs
)[11] = env
->regs
[R_ECX
];
166 (*regs
)[12] = env
->regs
[R_EDX
];
167 (*regs
)[13] = env
->regs
[R_ESI
];
168 (*regs
)[14] = env
->regs
[R_EDI
];
169 (*regs
)[15] = env
->regs
[R_EAX
]; /* XXX */
170 (*regs
)[16] = env
->eip
;
171 (*regs
)[17] = env
->segs
[R_CS
].selector
& 0xffff;
172 (*regs
)[18] = env
->eflags
;
173 (*regs
)[19] = env
->regs
[R_ESP
];
174 (*regs
)[20] = env
->segs
[R_SS
].selector
& 0xffff;
175 (*regs
)[21] = env
->segs
[R_FS
].selector
& 0xffff;
176 (*regs
)[22] = env
->segs
[R_GS
].selector
& 0xffff;
177 (*regs
)[23] = env
->segs
[R_DS
].selector
& 0xffff;
178 (*regs
)[24] = env
->segs
[R_ES
].selector
& 0xffff;
179 (*regs
)[25] = env
->segs
[R_FS
].selector
& 0xffff;
180 (*regs
)[26] = env
->segs
[R_GS
].selector
& 0xffff;
185 #define ELF_START_MMAP 0x80000000
188 * This is used to ensure we don't load something for the wrong architecture.
190 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
193 * These are used to set parameters in the core dumps.
195 #define ELF_CLASS ELFCLASS32
196 #define ELF_DATA ELFDATA2LSB
197 #define ELF_ARCH EM_386
199 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
201 regs
->esp
= infop
->start_stack
;
202 regs
->eip
= infop
->entry
;
204 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
205 starts %edx contains a pointer to a function which might be
206 registered using `atexit'. This provides a mean for the
207 dynamic linker to call DT_FINI functions for shared libraries
208 that have been loaded before the code runs.
210 A value of 0 tells we have no such handler. */
214 typedef target_ulong elf_greg_t
;
215 typedef uint16_t target_uid_t
;
216 typedef uint16_t target_gid_t
;
217 typedef int32_t target_pid_t
;
220 typedef elf_greg_t 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(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
;
289 typedef uint32_t elf_greg_t
;
290 typedef uint16_t target_uid_t
;
291 typedef uint16_t target_gid_t
;
292 typedef int32_t target_pid_t
;
295 typedef elf_greg_t elf_gregset_t
[ELF_NREG
];
297 static void elf_core_copy_regs(elf_gregset_t
*regs
, const CPUState
*env
)
299 (*regs
)[0] = env
->regs
[0];
300 (*regs
)[1] = env
->regs
[1];
301 (*regs
)[2] = env
->regs
[2];
302 (*regs
)[3] = env
->regs
[3];
303 (*regs
)[4] = env
->regs
[4];
304 (*regs
)[5] = env
->regs
[5];
305 (*regs
)[6] = env
->regs
[6];
306 (*regs
)[7] = env
->regs
[7];
307 (*regs
)[8] = env
->regs
[8];
308 (*regs
)[9] = env
->regs
[9];
309 (*regs
)[10] = env
->regs
[10];
310 (*regs
)[11] = env
->regs
[11];
311 (*regs
)[12] = env
->regs
[12];
312 (*regs
)[13] = env
->regs
[13];
313 (*regs
)[14] = env
->regs
[14];
314 (*regs
)[15] = env
->regs
[15];
316 (*regs
)[16] = cpsr_read((CPUState
*)env
);
317 (*regs
)[17] = env
->regs
[0]; /* XXX */
320 #define USE_ELF_CORE_DUMP
321 #define ELF_EXEC_PAGESIZE 4096
325 ARM_HWCAP_ARM_SWP
= 1 << 0,
326 ARM_HWCAP_ARM_HALF
= 1 << 1,
327 ARM_HWCAP_ARM_THUMB
= 1 << 2,
328 ARM_HWCAP_ARM_26BIT
= 1 << 3,
329 ARM_HWCAP_ARM_FAST_MULT
= 1 << 4,
330 ARM_HWCAP_ARM_FPA
= 1 << 5,
331 ARM_HWCAP_ARM_VFP
= 1 << 6,
332 ARM_HWCAP_ARM_EDSP
= 1 << 7,
335 #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
336 | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \
337 | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP)
342 #ifdef TARGET_SPARC64
344 #define ELF_START_MMAP 0x80000000
347 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
349 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
352 #define ELF_CLASS ELFCLASS64
353 #define ELF_DATA ELFDATA2MSB
354 #define ELF_ARCH EM_SPARCV9
356 #define STACK_BIAS 2047
358 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
363 regs
->pc
= infop
->entry
;
364 regs
->npc
= regs
->pc
+ 4;
367 regs
->u_regs
[14] = infop
->start_stack
- 16 * 4;
369 if (personality(infop
->personality
) == PER_LINUX32
)
370 regs
->u_regs
[14] = infop
->start_stack
- 16 * 4;
372 regs
->u_regs
[14] = infop
->start_stack
- 16 * 8 - STACK_BIAS
;
377 #define ELF_START_MMAP 0x80000000
379 #define elf_check_arch(x) ( (x) == EM_SPARC )
381 #define ELF_CLASS ELFCLASS32
382 #define ELF_DATA ELFDATA2MSB
383 #define ELF_ARCH EM_SPARC
385 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
388 regs
->pc
= infop
->entry
;
389 regs
->npc
= regs
->pc
+ 4;
391 regs
->u_regs
[14] = infop
->start_stack
- 16 * 4;
399 #define ELF_START_MMAP 0x80000000
401 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
403 #define elf_check_arch(x) ( (x) == EM_PPC64 )
405 #define ELF_CLASS ELFCLASS64
409 #define elf_check_arch(x) ( (x) == EM_PPC )
411 #define ELF_CLASS ELFCLASS32
415 #ifdef TARGET_WORDS_BIGENDIAN
416 #define ELF_DATA ELFDATA2MSB
418 #define ELF_DATA ELFDATA2LSB
420 #define ELF_ARCH EM_PPC
422 /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
423 See arch/powerpc/include/asm/cputable.h. */
425 PPC_FEATURE_32
= 0x80000000,
426 PPC_FEATURE_64
= 0x40000000,
427 PPC_FEATURE_601_INSTR
= 0x20000000,
428 PPC_FEATURE_HAS_ALTIVEC
= 0x10000000,
429 PPC_FEATURE_HAS_FPU
= 0x08000000,
430 PPC_FEATURE_HAS_MMU
= 0x04000000,
431 PPC_FEATURE_HAS_4xxMAC
= 0x02000000,
432 PPC_FEATURE_UNIFIED_CACHE
= 0x01000000,
433 PPC_FEATURE_HAS_SPE
= 0x00800000,
434 PPC_FEATURE_HAS_EFP_SINGLE
= 0x00400000,
435 PPC_FEATURE_HAS_EFP_DOUBLE
= 0x00200000,
436 PPC_FEATURE_NO_TB
= 0x00100000,
437 PPC_FEATURE_POWER4
= 0x00080000,
438 PPC_FEATURE_POWER5
= 0x00040000,
439 PPC_FEATURE_POWER5_PLUS
= 0x00020000,
440 PPC_FEATURE_CELL
= 0x00010000,
441 PPC_FEATURE_BOOKE
= 0x00008000,
442 PPC_FEATURE_SMT
= 0x00004000,
443 PPC_FEATURE_ICACHE_SNOOP
= 0x00002000,
444 PPC_FEATURE_ARCH_2_05
= 0x00001000,
445 PPC_FEATURE_PA6T
= 0x00000800,
446 PPC_FEATURE_HAS_DFP
= 0x00000400,
447 PPC_FEATURE_POWER6_EXT
= 0x00000200,
448 PPC_FEATURE_ARCH_2_06
= 0x00000100,
449 PPC_FEATURE_HAS_VSX
= 0x00000080,
450 PPC_FEATURE_PSERIES_PERFMON_COMPAT
= 0x00000040,
452 PPC_FEATURE_TRUE_LE
= 0x00000002,
453 PPC_FEATURE_PPC_LE
= 0x00000001,
456 #define ELF_HWCAP get_elf_hwcap()
458 static uint32_t get_elf_hwcap(void)
460 CPUState
*e
= thread_env
;
461 uint32_t features
= 0;
463 /* We don't have to be terribly complete here; the high points are
464 Altivec/FP/SPE support. Anything else is just a bonus. */
465 #define GET_FEATURE(flag, feature) \
466 do {if (e->insns_flags & flag) features |= feature; } while(0)
467 GET_FEATURE(PPC_64B
, PPC_FEATURE_64
);
468 GET_FEATURE(PPC_FLOAT
, PPC_FEATURE_HAS_FPU
);
469 GET_FEATURE(PPC_ALTIVEC
, PPC_FEATURE_HAS_ALTIVEC
);
470 GET_FEATURE(PPC_SPE
, PPC_FEATURE_HAS_SPE
);
471 GET_FEATURE(PPC_SPE_SINGLE
, PPC_FEATURE_HAS_EFP_SINGLE
);
472 GET_FEATURE(PPC_SPE_DOUBLE
, PPC_FEATURE_HAS_EFP_DOUBLE
);
473 GET_FEATURE(PPC_BOOKE
, PPC_FEATURE_BOOKE
);
474 GET_FEATURE(PPC_405_MAC
, PPC_FEATURE_HAS_4xxMAC
);
481 * We need to put in some extra aux table entries to tell glibc what
482 * the cache block size is, so it can use the dcbz instruction safely.
484 #define AT_DCACHEBSIZE 19
485 #define AT_ICACHEBSIZE 20
486 #define AT_UCACHEBSIZE 21
487 /* A special ignored type value for PPC, for glibc compatibility. */
488 #define AT_IGNOREPPC 22
490 * The requirements here are:
491 * - keep the final alignment of sp (sp & 0xf)
492 * - make sure the 32-bit value at the first 16 byte aligned position of
493 * AUXV is greater than 16 for glibc compatibility.
494 * AT_IGNOREPPC is used for that.
495 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
496 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
498 #define DLINFO_ARCH_ITEMS 5
499 #define ARCH_DLINFO \
501 NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
502 NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
503 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
505 * Now handle glibc compatibility. \
507 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
508 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
511 static inline void init_thread(struct target_pt_regs
*_regs
, struct image_info
*infop
)
513 abi_ulong pos
= infop
->start_stack
;
515 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
516 abi_ulong entry
, toc
;
519 _regs
->gpr
[1] = infop
->start_stack
;
520 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
521 entry
= ldq_raw(infop
->entry
) + infop
->load_addr
;
522 toc
= ldq_raw(infop
->entry
+ 8) + infop
->load_addr
;
524 infop
->entry
= entry
;
526 _regs
->nip
= infop
->entry
;
527 /* Note that isn't exactly what regular kernel does
528 * but this is what the ABI wants and is needed to allow
529 * execution of PPC BSD programs.
531 /* FIXME - what to for failure of get_user()? */
532 get_user_ual(_regs
->gpr
[3], pos
);
533 pos
+= sizeof(abi_ulong
);
535 for (tmp
= 1; tmp
!= 0; pos
+= sizeof(abi_ulong
))
540 #define ELF_EXEC_PAGESIZE 4096
546 #define ELF_START_MMAP 0x80000000
548 #define elf_check_arch(x) ( (x) == EM_MIPS )
551 #define ELF_CLASS ELFCLASS64
553 #define ELF_CLASS ELFCLASS32
555 #ifdef TARGET_WORDS_BIGENDIAN
556 #define ELF_DATA ELFDATA2MSB
558 #define ELF_DATA ELFDATA2LSB
560 #define ELF_ARCH EM_MIPS
562 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
564 regs
->cp0_status
= 2 << CP0St_KSU
;
565 regs
->cp0_epc
= infop
->entry
;
566 regs
->regs
[29] = infop
->start_stack
;
569 #define ELF_EXEC_PAGESIZE 4096
571 #endif /* TARGET_MIPS */
573 #ifdef TARGET_MICROBLAZE
575 #define ELF_START_MMAP 0x80000000
577 #define elf_check_arch(x) ( (x) == EM_XILINX_MICROBLAZE )
579 #define ELF_CLASS ELFCLASS32
580 #define ELF_DATA ELFDATA2MSB
581 #define ELF_ARCH EM_MIPS
583 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
585 regs
->pc
= infop
->entry
;
586 regs
->r1
= infop
->start_stack
;
590 #define ELF_EXEC_PAGESIZE 4096
592 #endif /* TARGET_MICROBLAZE */
596 #define ELF_START_MMAP 0x80000000
598 #define elf_check_arch(x) ( (x) == EM_SH )
600 #define ELF_CLASS ELFCLASS32
601 #define ELF_DATA ELFDATA2LSB
602 #define ELF_ARCH EM_SH
604 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
606 /* Check other registers XXXXX */
607 regs
->pc
= infop
->entry
;
608 regs
->regs
[15] = infop
->start_stack
;
611 #define ELF_EXEC_PAGESIZE 4096
617 #define ELF_START_MMAP 0x80000000
619 #define elf_check_arch(x) ( (x) == EM_CRIS )
621 #define ELF_CLASS ELFCLASS32
622 #define ELF_DATA ELFDATA2LSB
623 #define ELF_ARCH EM_CRIS
625 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
627 regs
->erp
= infop
->entry
;
630 #define ELF_EXEC_PAGESIZE 8192
636 #define ELF_START_MMAP 0x80000000
638 #define elf_check_arch(x) ( (x) == EM_68K )
640 #define ELF_CLASS ELFCLASS32
641 #define ELF_DATA ELFDATA2MSB
642 #define ELF_ARCH EM_68K
644 /* ??? Does this need to do anything?
645 #define ELF_PLAT_INIT(_r) */
647 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
649 regs
->usp
= infop
->start_stack
;
651 regs
->pc
= infop
->entry
;
654 #define ELF_EXEC_PAGESIZE 8192
660 #define ELF_START_MMAP (0x30000000000ULL)
662 #define elf_check_arch(x) ( (x) == ELF_ARCH )
664 #define ELF_CLASS ELFCLASS64
665 #define ELF_DATA ELFDATA2MSB
666 #define ELF_ARCH EM_ALPHA
668 static inline void init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
670 regs
->pc
= infop
->entry
;
672 regs
->usp
= infop
->start_stack
;
673 regs
->unique
= infop
->start_data
; /* ? */
674 printf("Set unique value to " TARGET_FMT_lx
" (" TARGET_FMT_lx
")\n",
675 regs
->unique
, infop
->start_data
);
678 #define ELF_EXEC_PAGESIZE 8192
680 #endif /* TARGET_ALPHA */
683 #define ELF_PLATFORM (NULL)
692 #define ELF_CLASS ELFCLASS32
694 #define bswaptls(ptr) bswap32s(ptr)
701 unsigned int a_info
; /* Use macros N_MAGIC, etc for access */
702 unsigned int a_text
; /* length of text, in bytes */
703 unsigned int a_data
; /* length of data, in bytes */
704 unsigned int a_bss
; /* length of uninitialized data area, in bytes */
705 unsigned int a_syms
; /* length of symbol table data in file, in bytes */
706 unsigned int a_entry
; /* start address */
707 unsigned int a_trsize
; /* length of relocation info for text, in bytes */
708 unsigned int a_drsize
; /* length of relocation info for data, in bytes */
712 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
718 /* max code+data+bss space allocated to elf interpreter */
719 #define INTERP_MAP_SIZE (32 * 1024 * 1024)
721 /* max code+data+bss+brk space allocated to ET_DYN executables */
722 #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
724 /* Necessary parameters */
725 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
726 #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
727 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
729 #define INTERPRETER_NONE 0
730 #define INTERPRETER_AOUT 1
731 #define INTERPRETER_ELF 2
733 #define DLINFO_ITEMS 12
735 static inline void memcpy_fromfs(void * to
, const void * from
, unsigned long n
)
740 static int load_aout_interp(void * exptr
, int interp_fd
);
743 static void bswap_ehdr(struct elfhdr
*ehdr
)
745 bswap16s(&ehdr
->e_type
); /* Object file type */
746 bswap16s(&ehdr
->e_machine
); /* Architecture */
747 bswap32s(&ehdr
->e_version
); /* Object file version */
748 bswaptls(&ehdr
->e_entry
); /* Entry point virtual address */
749 bswaptls(&ehdr
->e_phoff
); /* Program header table file offset */
750 bswaptls(&ehdr
->e_shoff
); /* Section header table file offset */
751 bswap32s(&ehdr
->e_flags
); /* Processor-specific flags */
752 bswap16s(&ehdr
->e_ehsize
); /* ELF header size in bytes */
753 bswap16s(&ehdr
->e_phentsize
); /* Program header table entry size */
754 bswap16s(&ehdr
->e_phnum
); /* Program header table entry count */
755 bswap16s(&ehdr
->e_shentsize
); /* Section header table entry size */
756 bswap16s(&ehdr
->e_shnum
); /* Section header table entry count */
757 bswap16s(&ehdr
->e_shstrndx
); /* Section header string table index */
760 static void bswap_phdr(struct elf_phdr
*phdr
)
762 bswap32s(&phdr
->p_type
); /* Segment type */
763 bswaptls(&phdr
->p_offset
); /* Segment file offset */
764 bswaptls(&phdr
->p_vaddr
); /* Segment virtual address */
765 bswaptls(&phdr
->p_paddr
); /* Segment physical address */
766 bswaptls(&phdr
->p_filesz
); /* Segment size in file */
767 bswaptls(&phdr
->p_memsz
); /* Segment size in memory */
768 bswap32s(&phdr
->p_flags
); /* Segment flags */
769 bswaptls(&phdr
->p_align
); /* Segment alignment */
772 static void bswap_shdr(struct elf_shdr
*shdr
)
774 bswap32s(&shdr
->sh_name
);
775 bswap32s(&shdr
->sh_type
);
776 bswaptls(&shdr
->sh_flags
);
777 bswaptls(&shdr
->sh_addr
);
778 bswaptls(&shdr
->sh_offset
);
779 bswaptls(&shdr
->sh_size
);
780 bswap32s(&shdr
->sh_link
);
781 bswap32s(&shdr
->sh_info
);
782 bswaptls(&shdr
->sh_addralign
);
783 bswaptls(&shdr
->sh_entsize
);
786 static void bswap_sym(struct elf_sym
*sym
)
788 bswap32s(&sym
->st_name
);
789 bswaptls(&sym
->st_value
);
790 bswaptls(&sym
->st_size
);
791 bswap16s(&sym
->st_shndx
);
795 #ifdef USE_ELF_CORE_DUMP
796 static int elf_core_dump(int, const CPUState
*);
799 static void bswap_note(struct elf_note
*en
)
801 bswaptls(&en
->n_namesz
);
802 bswaptls(&en
->n_descsz
);
803 bswaptls(&en
->n_type
);
805 #endif /* BSWAP_NEEDED */
807 #endif /* USE_ELF_CORE_DUMP */
810 * 'copy_elf_strings()' copies argument/envelope strings from user
811 * memory to free pages in kernel mem. These are in a format ready
812 * to be put directly into the top of new user memory.
815 static abi_ulong
copy_elf_strings(int argc
,char ** argv
, void **page
,
818 char *tmp
, *tmp1
, *pag
= NULL
;
822 return 0; /* bullet-proofing */
827 fprintf(stderr
, "VFS: argc is wrong");
833 if (p
< len
) { /* this shouldn't happen - 128kB */
839 offset
= p
% TARGET_PAGE_SIZE
;
840 pag
= (char *)page
[p
/TARGET_PAGE_SIZE
];
842 pag
= (char *)malloc(TARGET_PAGE_SIZE
);
843 memset(pag
, 0, TARGET_PAGE_SIZE
);
844 page
[p
/TARGET_PAGE_SIZE
] = pag
;
849 if (len
== 0 || offset
== 0) {
850 *(pag
+ offset
) = *tmp
;
853 int bytes_to_copy
= (len
> offset
) ? offset
: len
;
854 tmp
-= bytes_to_copy
;
856 offset
-= bytes_to_copy
;
857 len
-= bytes_to_copy
;
858 memcpy_fromfs(pag
+ offset
, tmp
, bytes_to_copy
+ 1);
865 static abi_ulong
setup_arg_pages(abi_ulong p
, struct linux_binprm
*bprm
,
866 struct image_info
*info
)
868 abi_ulong stack_base
, size
, error
;
871 /* Create enough stack to hold everything. If we don't use
872 * it for args, we'll use it for something else...
874 size
= x86_stack_size
;
875 if (size
< MAX_ARG_PAGES
*TARGET_PAGE_SIZE
)
876 size
= MAX_ARG_PAGES
*TARGET_PAGE_SIZE
;
877 error
= target_mmap(0,
878 size
+ qemu_host_page_size
,
879 PROT_READ
| PROT_WRITE
,
880 MAP_PRIVATE
| MAP_ANONYMOUS
,
886 /* we reserve one extra page at the top of the stack as guard */
887 target_mprotect(error
+ size
, qemu_host_page_size
, PROT_NONE
);
889 stack_base
= error
+ size
- MAX_ARG_PAGES
*TARGET_PAGE_SIZE
;
892 for (i
= 0 ; i
< MAX_ARG_PAGES
; i
++) {
895 /* FIXME - check return value of memcpy_to_target() for failure */
896 memcpy_to_target(stack_base
, bprm
->page
[i
], TARGET_PAGE_SIZE
);
899 stack_base
+= TARGET_PAGE_SIZE
;
904 static void set_brk(abi_ulong start
, abi_ulong end
)
906 /* page-align the start and end addresses... */
907 start
= HOST_PAGE_ALIGN(start
);
908 end
= HOST_PAGE_ALIGN(end
);
911 if(target_mmap(start
, end
- start
,
912 PROT_READ
| PROT_WRITE
| PROT_EXEC
,
913 MAP_FIXED
| MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0) == -1) {
914 perror("cannot mmap brk");
920 /* We need to explicitly zero any fractional pages after the data
921 section (i.e. bss). This would contain the junk from the file that
922 should not be in memory. */
923 static void padzero(abi_ulong elf_bss
, abi_ulong last_bss
)
927 if (elf_bss
>= last_bss
)
930 /* XXX: this is really a hack : if the real host page size is
931 smaller than the target page size, some pages after the end
932 of the file may not be mapped. A better fix would be to
933 patch target_mmap(), but it is more complicated as the file
934 size must be known */
935 if (qemu_real_host_page_size
< qemu_host_page_size
) {
936 abi_ulong end_addr
, end_addr1
;
937 end_addr1
= (elf_bss
+ qemu_real_host_page_size
- 1) &
938 ~(qemu_real_host_page_size
- 1);
939 end_addr
= HOST_PAGE_ALIGN(elf_bss
);
940 if (end_addr1
< end_addr
) {
941 mmap((void *)g2h(end_addr1
), end_addr
- end_addr1
,
942 PROT_READ
|PROT_WRITE
|PROT_EXEC
,
943 MAP_FIXED
|MAP_PRIVATE
|MAP_ANONYMOUS
, -1, 0);
947 nbyte
= elf_bss
& (qemu_host_page_size
-1);
949 nbyte
= qemu_host_page_size
- nbyte
;
951 /* FIXME - what to do if put_user() fails? */
952 put_user_u8(0, elf_bss
);
959 static abi_ulong
create_elf_tables(abi_ulong p
, int argc
, int envc
,
960 struct elfhdr
* exec
,
963 abi_ulong interp_load_addr
, int ibcs
,
964 struct image_info
*info
)
968 abi_ulong u_platform
;
969 const char *k_platform
;
970 const int n
= sizeof(elf_addr_t
);
974 k_platform
= ELF_PLATFORM
;
976 size_t len
= strlen(k_platform
) + 1;
977 sp
-= (len
+ n
- 1) & ~(n
- 1);
979 /* FIXME - check return value of memcpy_to_target() for failure */
980 memcpy_to_target(sp
, k_platform
, len
);
983 * Force 16 byte _final_ alignment here for generality.
985 sp
= sp
&~ (abi_ulong
)15;
986 size
= (DLINFO_ITEMS
+ 1) * 2;
989 #ifdef DLINFO_ARCH_ITEMS
990 size
+= DLINFO_ARCH_ITEMS
* 2;
992 size
+= envc
+ argc
+ 2;
993 size
+= (!ibcs
? 3 : 1); /* argc itself */
996 sp
-= 16 - (size
& 15);
998 /* This is correct because Linux defines
999 * elf_addr_t as Elf32_Off / Elf64_Off
1001 #define NEW_AUX_ENT(id, val) do { \
1002 sp -= n; put_user_ual(val, sp); \
1003 sp -= n; put_user_ual(id, sp); \
1006 NEW_AUX_ENT (AT_NULL
, 0);
1008 /* There must be exactly DLINFO_ITEMS entries here. */
1009 NEW_AUX_ENT(AT_PHDR
, (abi_ulong
)(load_addr
+ exec
->e_phoff
));
1010 NEW_AUX_ENT(AT_PHENT
, (abi_ulong
)(sizeof (struct elf_phdr
)));
1011 NEW_AUX_ENT(AT_PHNUM
, (abi_ulong
)(exec
->e_phnum
));
1012 NEW_AUX_ENT(AT_PAGESZ
, (abi_ulong
)(TARGET_PAGE_SIZE
));
1013 NEW_AUX_ENT(AT_BASE
, (abi_ulong
)(interp_load_addr
));
1014 NEW_AUX_ENT(AT_FLAGS
, (abi_ulong
)0);
1015 NEW_AUX_ENT(AT_ENTRY
, load_bias
+ exec
->e_entry
);
1016 NEW_AUX_ENT(AT_UID
, (abi_ulong
) getuid());
1017 NEW_AUX_ENT(AT_EUID
, (abi_ulong
) geteuid());
1018 NEW_AUX_ENT(AT_GID
, (abi_ulong
) getgid());
1019 NEW_AUX_ENT(AT_EGID
, (abi_ulong
) getegid());
1020 NEW_AUX_ENT(AT_HWCAP
, (abi_ulong
) ELF_HWCAP
);
1021 NEW_AUX_ENT(AT_CLKTCK
, (abi_ulong
) sysconf(_SC_CLK_TCK
));
1023 NEW_AUX_ENT(AT_PLATFORM
, u_platform
);
1026 * ARCH_DLINFO must come last so platform specific code can enforce
1027 * special alignment requirements on the AUXV if necessary (eg. PPC).
1033 info
->saved_auxv
= sp
;
1035 sp
= loader_build_argptr(envc
, argc
, sp
, p
, !ibcs
);
1040 static abi_ulong
load_elf_interp(struct elfhdr
* interp_elf_ex
,
1042 abi_ulong
*interp_load_addr
)
1044 struct elf_phdr
*elf_phdata
= NULL
;
1045 struct elf_phdr
*eppnt
;
1046 abi_ulong load_addr
= 0;
1047 int load_addr_set
= 0;
1049 abi_ulong last_bss
, elf_bss
;
1058 bswap_ehdr(interp_elf_ex
);
1060 /* First of all, some simple consistency checks */
1061 if ((interp_elf_ex
->e_type
!= ET_EXEC
&&
1062 interp_elf_ex
->e_type
!= ET_DYN
) ||
1063 !elf_check_arch(interp_elf_ex
->e_machine
)) {
1064 return ~((abi_ulong
)0UL);
1068 /* Now read in all of the header information */
1070 if (sizeof(struct elf_phdr
) * interp_elf_ex
->e_phnum
> TARGET_PAGE_SIZE
)
1071 return ~(abi_ulong
)0UL;
1073 elf_phdata
= (struct elf_phdr
*)
1074 malloc(sizeof(struct elf_phdr
) * interp_elf_ex
->e_phnum
);
1077 return ~((abi_ulong
)0UL);
1080 * If the size of this structure has changed, then punt, since
1081 * we will be doing the wrong thing.
1083 if (interp_elf_ex
->e_phentsize
!= sizeof(struct elf_phdr
)) {
1085 return ~((abi_ulong
)0UL);
1088 retval
= lseek(interpreter_fd
, interp_elf_ex
->e_phoff
, SEEK_SET
);
1090 retval
= read(interpreter_fd
,
1091 (char *) elf_phdata
,
1092 sizeof(struct elf_phdr
) * interp_elf_ex
->e_phnum
);
1095 perror("load_elf_interp");
1102 for (i
=0; i
<interp_elf_ex
->e_phnum
; i
++, eppnt
++) {
1107 if (interp_elf_ex
->e_type
== ET_DYN
) {
1108 /* in order to avoid hardcoding the interpreter load
1109 address in qemu, we allocate a big enough memory zone */
1110 error
= target_mmap(0, INTERP_MAP_SIZE
,
1111 PROT_NONE
, MAP_PRIVATE
| MAP_ANON
,
1122 for(i
=0; i
<interp_elf_ex
->e_phnum
; i
++, eppnt
++)
1123 if (eppnt
->p_type
== PT_LOAD
) {
1124 int elf_type
= MAP_PRIVATE
| MAP_DENYWRITE
;
1126 abi_ulong vaddr
= 0;
1129 if (eppnt
->p_flags
& PF_R
) elf_prot
= PROT_READ
;
1130 if (eppnt
->p_flags
& PF_W
) elf_prot
|= PROT_WRITE
;
1131 if (eppnt
->p_flags
& PF_X
) elf_prot
|= PROT_EXEC
;
1132 if (interp_elf_ex
->e_type
== ET_EXEC
|| load_addr_set
) {
1133 elf_type
|= MAP_FIXED
;
1134 vaddr
= eppnt
->p_vaddr
;
1136 error
= target_mmap(load_addr
+TARGET_ELF_PAGESTART(vaddr
),
1137 eppnt
->p_filesz
+ TARGET_ELF_PAGEOFFSET(eppnt
->p_vaddr
),
1141 eppnt
->p_offset
- TARGET_ELF_PAGEOFFSET(eppnt
->p_vaddr
));
1145 close(interpreter_fd
);
1147 return ~((abi_ulong
)0UL);
1150 if (!load_addr_set
&& interp_elf_ex
->e_type
== ET_DYN
) {
1156 * Find the end of the file mapping for this phdr, and keep
1157 * track of the largest address we see for this.
1159 k
= load_addr
+ eppnt
->p_vaddr
+ eppnt
->p_filesz
;
1160 if (k
> elf_bss
) elf_bss
= k
;
1163 * Do the same thing for the memory mapping - between
1164 * elf_bss and last_bss is the bss section.
1166 k
= load_addr
+ eppnt
->p_memsz
+ eppnt
->p_vaddr
;
1167 if (k
> last_bss
) last_bss
= k
;
1170 /* Now use mmap to map the library into memory. */
1172 close(interpreter_fd
);
1175 * Now fill out the bss section. First pad the last page up
1176 * to the page boundary, and then perform a mmap to make sure
1177 * that there are zeromapped pages up to and including the last
1180 padzero(elf_bss
, last_bss
);
1181 elf_bss
= TARGET_ELF_PAGESTART(elf_bss
+ qemu_host_page_size
- 1); /* What we have mapped so far */
1183 /* Map the last of the bss segment */
1184 if (last_bss
> elf_bss
) {
1185 target_mmap(elf_bss
, last_bss
-elf_bss
,
1186 PROT_READ
|PROT_WRITE
|PROT_EXEC
,
1187 MAP_FIXED
|MAP_PRIVATE
|MAP_ANONYMOUS
, -1, 0);
1191 *interp_load_addr
= load_addr
;
1192 return ((abi_ulong
) interp_elf_ex
->e_entry
) + load_addr
;
1195 static int symfind(const void *s0
, const void *s1
)
1197 struct elf_sym
*key
= (struct elf_sym
*)s0
;
1198 struct elf_sym
*sym
= (struct elf_sym
*)s1
;
1200 if (key
->st_value
< sym
->st_value
) {
1202 } else if (key
->st_value
> sym
->st_value
+ sym
->st_size
) {
1208 static const char *lookup_symbolxx(struct syminfo
*s
, target_ulong orig_addr
)
1210 #if ELF_CLASS == ELFCLASS32
1211 struct elf_sym
*syms
= s
->disas_symtab
.elf32
;
1213 struct elf_sym
*syms
= s
->disas_symtab
.elf64
;
1218 struct elf_sym
*sym
;
1220 key
.st_value
= orig_addr
;
1222 sym
= bsearch(&key
, syms
, s
->disas_num_syms
, sizeof(*syms
), symfind
);
1224 return s
->disas_strtab
+ sym
->st_name
;
1230 /* FIXME: This should use elf_ops.h */
1231 static int symcmp(const void *s0
, const void *s1
)
1233 struct elf_sym
*sym0
= (struct elf_sym
*)s0
;
1234 struct elf_sym
*sym1
= (struct elf_sym
*)s1
;
1235 return (sym0
->st_value
< sym1
->st_value
)
1237 : ((sym0
->st_value
> sym1
->st_value
) ? 1 : 0);
1240 /* Best attempt to load symbols from this ELF object. */
1241 static void load_symbols(struct elfhdr
*hdr
, int fd
)
1243 unsigned int i
, nsyms
;
1244 struct elf_shdr sechdr
, symtab
, strtab
;
1247 struct elf_sym
*syms
;
1249 lseek(fd
, hdr
->e_shoff
, SEEK_SET
);
1250 for (i
= 0; i
< hdr
->e_shnum
; i
++) {
1251 if (read(fd
, &sechdr
, sizeof(sechdr
)) != sizeof(sechdr
))
1254 bswap_shdr(&sechdr
);
1256 if (sechdr
.sh_type
== SHT_SYMTAB
) {
1258 lseek(fd
, hdr
->e_shoff
1259 + sizeof(sechdr
) * sechdr
.sh_link
, SEEK_SET
);
1260 if (read(fd
, &strtab
, sizeof(strtab
))
1264 bswap_shdr(&strtab
);
1269 return; /* Shouldn't happen... */
1272 /* Now know where the strtab and symtab are. Snarf them. */
1273 s
= malloc(sizeof(*s
));
1274 syms
= malloc(symtab
.sh_size
);
1277 s
->disas_strtab
= strings
= malloc(strtab
.sh_size
);
1278 if (!s
->disas_strtab
)
1281 lseek(fd
, symtab
.sh_offset
, SEEK_SET
);
1282 if (read(fd
, syms
, symtab
.sh_size
) != symtab
.sh_size
)
1285 nsyms
= symtab
.sh_size
/ sizeof(struct elf_sym
);
1290 bswap_sym(syms
+ i
);
1292 // Throw away entries which we do not need.
1293 if (syms
[i
].st_shndx
== SHN_UNDEF
||
1294 syms
[i
].st_shndx
>= SHN_LORESERVE
||
1295 ELF_ST_TYPE(syms
[i
].st_info
) != STT_FUNC
) {
1298 syms
[i
] = syms
[nsyms
];
1302 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
1303 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
1304 syms
[i
].st_value
&= ~(target_ulong
)1;
1308 syms
= realloc(syms
, nsyms
* sizeof(*syms
));
1310 qsort(syms
, nsyms
, sizeof(*syms
), symcmp
);
1312 lseek(fd
, strtab
.sh_offset
, SEEK_SET
);
1313 if (read(fd
, strings
, strtab
.sh_size
) != strtab
.sh_size
)
1315 s
->disas_num_syms
= nsyms
;
1316 #if ELF_CLASS == ELFCLASS32
1317 s
->disas_symtab
.elf32
= syms
;
1318 s
->lookup_symbol
= lookup_symbolxx
;
1320 s
->disas_symtab
.elf64
= syms
;
1321 s
->lookup_symbol
= lookup_symbolxx
;
1327 int load_elf_binary(struct linux_binprm
* bprm
, struct target_pt_regs
* regs
,
1328 struct image_info
* info
)
1330 struct elfhdr elf_ex
;
1331 struct elfhdr interp_elf_ex
;
1332 struct exec interp_ex
;
1333 int interpreter_fd
= -1; /* avoid warning */
1334 abi_ulong load_addr
, load_bias
;
1335 int load_addr_set
= 0;
1336 unsigned int interpreter_type
= INTERPRETER_NONE
;
1337 unsigned char ibcs2_interpreter
;
1339 abi_ulong mapped_addr
;
1340 struct elf_phdr
* elf_ppnt
;
1341 struct elf_phdr
*elf_phdata
;
1342 abi_ulong elf_bss
, k
, elf_brk
;
1344 char * elf_interpreter
;
1345 abi_ulong elf_entry
, interp_load_addr
= 0;
1347 abi_ulong start_code
, end_code
, start_data
, end_data
;
1348 abi_ulong reloc_func_desc
= 0;
1349 abi_ulong elf_stack
;
1350 char passed_fileno
[6];
1352 ibcs2_interpreter
= 0;
1356 elf_ex
= *((struct elfhdr
*) bprm
->buf
); /* exec-header */
1358 bswap_ehdr(&elf_ex
);
1361 /* First of all, some simple consistency checks */
1362 if ((elf_ex
.e_type
!= ET_EXEC
&& elf_ex
.e_type
!= ET_DYN
) ||
1363 (! elf_check_arch(elf_ex
.e_machine
))) {
1367 bprm
->p
= copy_elf_strings(1, &bprm
->filename
, bprm
->page
, bprm
->p
);
1368 bprm
->p
= copy_elf_strings(bprm
->envc
,bprm
->envp
,bprm
->page
,bprm
->p
);
1369 bprm
->p
= copy_elf_strings(bprm
->argc
,bprm
->argv
,bprm
->page
,bprm
->p
);
1374 /* Now read in all of the header information */
1375 elf_phdata
= (struct elf_phdr
*)malloc(elf_ex
.e_phentsize
*elf_ex
.e_phnum
);
1376 if (elf_phdata
== NULL
) {
1380 retval
= lseek(bprm
->fd
, elf_ex
.e_phoff
, SEEK_SET
);
1382 retval
= read(bprm
->fd
, (char *) elf_phdata
,
1383 elf_ex
.e_phentsize
* elf_ex
.e_phnum
);
1387 perror("load_elf_binary");
1394 elf_ppnt
= elf_phdata
;
1395 for (i
=0; i
<elf_ex
.e_phnum
; i
++, elf_ppnt
++) {
1396 bswap_phdr(elf_ppnt
);
1399 elf_ppnt
= elf_phdata
;
1405 elf_stack
= ~((abi_ulong
)0UL);
1406 elf_interpreter
= NULL
;
1407 start_code
= ~((abi_ulong
)0UL);
1411 interp_ex
.a_info
= 0;
1413 for(i
=0;i
< elf_ex
.e_phnum
; i
++) {
1414 if (elf_ppnt
->p_type
== PT_INTERP
) {
1415 if ( elf_interpreter
!= NULL
)
1418 free(elf_interpreter
);
1423 /* This is the program interpreter used for
1424 * shared libraries - for now assume that this
1425 * is an a.out format binary
1428 elf_interpreter
= (char *)malloc(elf_ppnt
->p_filesz
);
1430 if (elf_interpreter
== NULL
) {
1436 retval
= lseek(bprm
->fd
, elf_ppnt
->p_offset
, SEEK_SET
);
1438 retval
= read(bprm
->fd
, elf_interpreter
, elf_ppnt
->p_filesz
);
1441 perror("load_elf_binary2");
1445 /* If the program interpreter is one of these two,
1446 then assume an iBCS2 image. Otherwise assume
1447 a native linux image. */
1449 /* JRP - Need to add X86 lib dir stuff here... */
1451 if (strcmp(elf_interpreter
,"/usr/lib/libc.so.1") == 0 ||
1452 strcmp(elf_interpreter
,"/usr/lib/ld.so.1") == 0) {
1453 ibcs2_interpreter
= 1;
1457 printf("Using ELF interpreter %s\n", elf_interpreter
);
1460 retval
= open(path(elf_interpreter
), O_RDONLY
);
1462 interpreter_fd
= retval
;
1465 perror(elf_interpreter
);
1467 /* retval = -errno; */
1472 retval
= lseek(interpreter_fd
, 0, SEEK_SET
);
1474 retval
= read(interpreter_fd
,bprm
->buf
,128);
1478 interp_ex
= *((struct exec
*) bprm
->buf
); /* aout exec-header */
1479 interp_elf_ex
=*((struct elfhdr
*) bprm
->buf
); /* elf exec-header */
1482 perror("load_elf_binary3");
1485 free(elf_interpreter
);
1493 /* Some simple consistency checks for the interpreter */
1494 if (elf_interpreter
){
1495 interpreter_type
= INTERPRETER_ELF
| INTERPRETER_AOUT
;
1497 /* Now figure out which format our binary is */
1498 if ((N_MAGIC(interp_ex
) != OMAGIC
) && (N_MAGIC(interp_ex
) != ZMAGIC
) &&
1499 (N_MAGIC(interp_ex
) != QMAGIC
)) {
1500 interpreter_type
= INTERPRETER_ELF
;
1503 if (interp_elf_ex
.e_ident
[0] != 0x7f ||
1504 strncmp((char *)&interp_elf_ex
.e_ident
[1], "ELF",3) != 0) {
1505 interpreter_type
&= ~INTERPRETER_ELF
;
1508 if (!interpreter_type
) {
1509 free(elf_interpreter
);
1516 /* OK, we are done with that, now set up the arg stuff,
1517 and then start this sucker up */
1522 if (interpreter_type
== INTERPRETER_AOUT
) {
1523 snprintf(passed_fileno
, sizeof(passed_fileno
), "%d", bprm
->fd
);
1524 passed_p
= passed_fileno
;
1526 if (elf_interpreter
) {
1527 bprm
->p
= copy_elf_strings(1,&passed_p
,bprm
->page
,bprm
->p
);
1532 if (elf_interpreter
) {
1533 free(elf_interpreter
);
1541 /* OK, This is the point of no return */
1544 info
->start_mmap
= (abi_ulong
)ELF_START_MMAP
;
1546 elf_entry
= (abi_ulong
) elf_ex
.e_entry
;
1548 #if defined(CONFIG_USE_GUEST_BASE)
1550 * In case where user has not explicitly set the guest_base, we
1551 * probe here that should we set it automatically.
1553 if (!have_guest_base
) {
1555 * Go through ELF program header table and find out whether
1556 * any of the segments drop below our current mmap_min_addr and
1557 * in that case set guest_base to corresponding address.
1559 for (i
= 0, elf_ppnt
= elf_phdata
; i
< elf_ex
.e_phnum
;
1561 if (elf_ppnt
->p_type
!= PT_LOAD
)
1563 if (HOST_PAGE_ALIGN(elf_ppnt
->p_vaddr
) < mmap_min_addr
) {
1564 guest_base
= HOST_PAGE_ALIGN(mmap_min_addr
);
1569 #endif /* CONFIG_USE_GUEST_BASE */
1571 /* Do this so that we can load the interpreter, if need be. We will
1572 change some of these later */
1574 bprm
->p
= setup_arg_pages(bprm
->p
, bprm
, info
);
1575 info
->start_stack
= bprm
->p
;
1577 /* Now we do a little grungy work by mmaping the ELF image into
1578 * the correct location in memory. At this point, we assume that
1579 * the image should be loaded at fixed address, not at a variable
1583 for(i
= 0, elf_ppnt
= elf_phdata
; i
< elf_ex
.e_phnum
; i
++, elf_ppnt
++) {
1588 if (elf_ppnt
->p_type
!= PT_LOAD
)
1591 if (elf_ppnt
->p_flags
& PF_R
) elf_prot
|= PROT_READ
;
1592 if (elf_ppnt
->p_flags
& PF_W
) elf_prot
|= PROT_WRITE
;
1593 if (elf_ppnt
->p_flags
& PF_X
) elf_prot
|= PROT_EXEC
;
1594 elf_flags
= MAP_PRIVATE
| MAP_DENYWRITE
;
1595 if (elf_ex
.e_type
== ET_EXEC
|| load_addr_set
) {
1596 elf_flags
|= MAP_FIXED
;
1597 } else if (elf_ex
.e_type
== ET_DYN
) {
1598 /* Try and get dynamic programs out of the way of the default mmap
1599 base, as well as whatever program they might try to exec. This
1600 is because the brk will follow the loader, and is not movable. */
1601 /* NOTE: for qemu, we do a big mmap to get enough space
1602 without hardcoding any address */
1603 error
= target_mmap(0, ET_DYN_MAP_SIZE
,
1604 PROT_NONE
, MAP_PRIVATE
| MAP_ANON
,
1610 load_bias
= TARGET_ELF_PAGESTART(error
- elf_ppnt
->p_vaddr
);
1613 error
= target_mmap(TARGET_ELF_PAGESTART(load_bias
+ elf_ppnt
->p_vaddr
),
1614 (elf_ppnt
->p_filesz
+
1615 TARGET_ELF_PAGEOFFSET(elf_ppnt
->p_vaddr
)),
1617 (MAP_FIXED
| MAP_PRIVATE
| MAP_DENYWRITE
),
1619 (elf_ppnt
->p_offset
-
1620 TARGET_ELF_PAGEOFFSET(elf_ppnt
->p_vaddr
)));
1626 #ifdef LOW_ELF_STACK
1627 if (TARGET_ELF_PAGESTART(elf_ppnt
->p_vaddr
) < elf_stack
)
1628 elf_stack
= TARGET_ELF_PAGESTART(elf_ppnt
->p_vaddr
);
1631 if (!load_addr_set
) {
1633 load_addr
= elf_ppnt
->p_vaddr
- elf_ppnt
->p_offset
;
1634 if (elf_ex
.e_type
== ET_DYN
) {
1635 load_bias
+= error
-
1636 TARGET_ELF_PAGESTART(load_bias
+ elf_ppnt
->p_vaddr
);
1637 load_addr
+= load_bias
;
1638 reloc_func_desc
= load_bias
;
1641 k
= elf_ppnt
->p_vaddr
;
1646 k
= elf_ppnt
->p_vaddr
+ elf_ppnt
->p_filesz
;
1649 if ((elf_ppnt
->p_flags
& PF_X
) && end_code
< k
)
1653 k
= elf_ppnt
->p_vaddr
+ elf_ppnt
->p_memsz
;
1654 if (k
> elf_brk
) elf_brk
= k
;
1657 elf_entry
+= load_bias
;
1658 elf_bss
+= load_bias
;
1659 elf_brk
+= load_bias
;
1660 start_code
+= load_bias
;
1661 end_code
+= load_bias
;
1662 start_data
+= load_bias
;
1663 end_data
+= load_bias
;
1665 if (elf_interpreter
) {
1666 if (interpreter_type
& 1) {
1667 elf_entry
= load_aout_interp(&interp_ex
, interpreter_fd
);
1669 else if (interpreter_type
& 2) {
1670 elf_entry
= load_elf_interp(&interp_elf_ex
, interpreter_fd
,
1673 reloc_func_desc
= interp_load_addr
;
1675 close(interpreter_fd
);
1676 free(elf_interpreter
);
1678 if (elf_entry
== ~((abi_ulong
)0UL)) {
1679 printf("Unable to load interpreter\n");
1688 if (qemu_log_enabled())
1689 load_symbols(&elf_ex
, bprm
->fd
);
1691 if (interpreter_type
!= INTERPRETER_AOUT
) close(bprm
->fd
);
1692 info
->personality
= (ibcs2_interpreter
? PER_SVR4
: PER_LINUX
);
1694 #ifdef LOW_ELF_STACK
1695 info
->start_stack
= bprm
->p
= elf_stack
- 4;
1697 bprm
->p
= create_elf_tables(bprm
->p
,
1701 load_addr
, load_bias
,
1703 (interpreter_type
== INTERPRETER_AOUT
? 0 : 1),
1705 info
->load_addr
= reloc_func_desc
;
1706 info
->start_brk
= info
->brk
= elf_brk
;
1707 info
->end_code
= end_code
;
1708 info
->start_code
= start_code
;
1709 info
->start_data
= start_data
;
1710 info
->end_data
= end_data
;
1711 info
->start_stack
= bprm
->p
;
1713 /* Calling set_brk effectively mmaps the pages that we need for the bss and break
1715 set_brk(elf_bss
, elf_brk
);
1717 padzero(elf_bss
, elf_brk
);
1720 printf("(start_brk) %x\n" , info
->start_brk
);
1721 printf("(end_code) %x\n" , info
->end_code
);
1722 printf("(start_code) %x\n" , info
->start_code
);
1723 printf("(end_data) %x\n" , info
->end_data
);
1724 printf("(start_stack) %x\n" , info
->start_stack
);
1725 printf("(brk) %x\n" , info
->brk
);
1728 if ( info
->personality
== PER_SVR4
)
1730 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
1731 and some applications "depend" upon this behavior.
1732 Since we do not have the power to recompile these, we
1733 emulate the SVr4 behavior. Sigh. */
1734 mapped_addr
= target_mmap(0, qemu_host_page_size
, PROT_READ
| PROT_EXEC
,
1735 MAP_FIXED
| MAP_PRIVATE
, -1, 0);
1738 info
->entry
= elf_entry
;
1740 #ifdef USE_ELF_CORE_DUMP
1741 bprm
->core_dump
= &elf_core_dump
;
1747 #ifdef USE_ELF_CORE_DUMP
1750 * Definitions to generate Intel SVR4-like core files.
1751 * These mostly have the same names as the SVR4 types with "elf_"
1752 * tacked on the front to prevent clashes with linux definitions,
1753 * and the typedef forms have been avoided. This is mostly like
1754 * the SVR4 structure, but more Linuxy, with things that Linux does
1755 * not support and which gdb doesn't really use excluded.
1757 * Fields we don't dump (their contents is zero) in linux-user qemu
1758 * are marked with XXX.
1760 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
1762 * Porting ELF coredump for target is (quite) simple process. First you
1763 * define ELF_USE_CORE_DUMP in target ELF code (where init_thread() for
1764 * the target resides):
1766 * #define USE_ELF_CORE_DUMP
1768 * Next you define type of register set used for dumping. ELF specification
1769 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
1771 * typedef <target_regtype> elf_greg_t;
1772 * #define ELF_NREG <number of registers>
1773 * typedef elf_greg_t elf_gregset_t[ELF_NREG];
1775 * Then define following types to match target types. Actual types can
1776 * be found from linux kernel (arch/<ARCH>/include/asm/posix_types.h):
1778 * typedef <target_uid_type> target_uid_t;
1779 * typedef <target_gid_type> target_gid_t;
1780 * typedef <target_pid_type> target_pid_t;
1782 * Last step is to implement target specific function that copies registers
1783 * from given cpu into just specified register set. Prototype is:
1785 * static void elf_core_copy_regs(elf_gregset_t *regs, const CPUState *env);
1788 * regs - copy register values into here (allocated and zeroed by caller)
1789 * env - copy registers from here
1791 * Example for ARM target is provided in this file.
1794 /* An ELF note in memory */
1798 size_t namesz_rounded
;
1805 struct elf_siginfo
{
1806 int si_signo
; /* signal number */
1807 int si_code
; /* extra code */
1808 int si_errno
; /* errno */
1811 struct elf_prstatus
{
1812 struct elf_siginfo pr_info
; /* Info associated with signal */
1813 short pr_cursig
; /* Current signal */
1814 target_ulong pr_sigpend
; /* XXX */
1815 target_ulong pr_sighold
; /* XXX */
1816 target_pid_t pr_pid
;
1817 target_pid_t pr_ppid
;
1818 target_pid_t pr_pgrp
;
1819 target_pid_t pr_sid
;
1820 struct target_timeval pr_utime
; /* XXX User time */
1821 struct target_timeval pr_stime
; /* XXX System time */
1822 struct target_timeval pr_cutime
; /* XXX Cumulative user time */
1823 struct target_timeval pr_cstime
; /* XXX Cumulative system time */
1824 elf_gregset_t pr_reg
; /* GP registers */
1825 int pr_fpvalid
; /* XXX */
1828 #define ELF_PRARGSZ (80) /* Number of chars for args */
1830 struct elf_prpsinfo
{
1831 char pr_state
; /* numeric process state */
1832 char pr_sname
; /* char for pr_state */
1833 char pr_zomb
; /* zombie */
1834 char pr_nice
; /* nice val */
1835 target_ulong pr_flag
; /* flags */
1836 target_uid_t pr_uid
;
1837 target_gid_t pr_gid
;
1838 target_pid_t pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
1840 char pr_fname
[16]; /* filename of executable */
1841 char pr_psargs
[ELF_PRARGSZ
]; /* initial part of arg list */
1844 /* Here is the structure in which status of each thread is captured. */
1845 struct elf_thread_status
{
1846 TAILQ_ENTRY(elf_thread_status
) ets_link
;
1847 struct elf_prstatus prstatus
; /* NT_PRSTATUS */
1849 elf_fpregset_t fpu
; /* NT_PRFPREG */
1850 struct task_struct
*thread
;
1851 elf_fpxregset_t xfpu
; /* ELF_CORE_XFPREG_TYPE */
1853 struct memelfnote notes
[1];
1857 struct elf_note_info
{
1858 struct memelfnote
*notes
;
1859 struct elf_prstatus
*prstatus
; /* NT_PRSTATUS */
1860 struct elf_prpsinfo
*psinfo
; /* NT_PRPSINFO */
1862 TAILQ_HEAD(thread_list_head
, elf_thread_status
) thread_list
;
1865 * Current version of ELF coredump doesn't support
1866 * dumping fp regs etc.
1868 elf_fpregset_t
*fpu
;
1869 elf_fpxregset_t
*xfpu
;
1870 int thread_status_size
;
1876 struct vm_area_struct
{
1877 abi_ulong vma_start
; /* start vaddr of memory region */
1878 abi_ulong vma_end
; /* end vaddr of memory region */
1879 abi_ulong vma_flags
; /* protection etc. flags for the region */
1880 TAILQ_ENTRY(vm_area_struct
) vma_link
;
1884 TAILQ_HEAD(, vm_area_struct
) mm_mmap
;
1885 int mm_count
; /* number of mappings */
1888 static struct mm_struct
*vma_init(void);
1889 static void vma_delete(struct mm_struct
*);
1890 static int vma_add_mapping(struct mm_struct
*, abi_ulong
,
1891 abi_ulong
, abi_ulong
);
1892 static int vma_get_mapping_count(const struct mm_struct
*);
1893 static struct vm_area_struct
*vma_first(const struct mm_struct
*);
1894 static struct vm_area_struct
*vma_next(struct vm_area_struct
*);
1895 static abi_ulong
vma_dump_size(const struct vm_area_struct
*);
1896 static int vma_walker(void *priv
, unsigned long start
, unsigned long end
,
1897 unsigned long flags
);
1899 static void fill_elf_header(struct elfhdr
*, int, uint16_t, uint32_t);
1900 static void fill_note(struct memelfnote
*, const char *, int,
1901 unsigned int, void *);
1902 static void fill_prstatus(struct elf_prstatus
*, const TaskState
*, int);
1903 static int fill_psinfo(struct elf_prpsinfo
*, const TaskState
*);
1904 static void fill_auxv_note(struct memelfnote
*, const TaskState
*);
1905 static void fill_elf_note_phdr(struct elf_phdr
*, int, off_t
);
1906 static size_t note_size(const struct memelfnote
*);
1907 static void free_note_info(struct elf_note_info
*);
1908 static int fill_note_info(struct elf_note_info
*, long, const CPUState
*);
1909 static void fill_thread_info(struct elf_note_info
*, const CPUState
*);
1910 static int core_dump_filename(const TaskState
*, char *, size_t);
1912 static int dump_write(int, const void *, size_t);
1913 static int write_note(struct memelfnote
*, int);
1914 static int write_note_info(struct elf_note_info
*, int);
1917 static void bswap_prstatus(struct elf_prstatus
*);
1918 static void bswap_psinfo(struct elf_prpsinfo
*);
1920 static void bswap_prstatus(struct elf_prstatus
*prstatus
)
1922 prstatus
->pr_info
.si_signo
= tswapl(prstatus
->pr_info
.si_signo
);
1923 prstatus
->pr_info
.si_code
= tswapl(prstatus
->pr_info
.si_code
);
1924 prstatus
->pr_info
.si_errno
= tswapl(prstatus
->pr_info
.si_errno
);
1925 prstatus
->pr_cursig
= tswap16(prstatus
->pr_cursig
);
1926 prstatus
->pr_sigpend
= tswapl(prstatus
->pr_sigpend
);
1927 prstatus
->pr_sighold
= tswapl(prstatus
->pr_sighold
);
1928 prstatus
->pr_pid
= tswap32(prstatus
->pr_pid
);
1929 prstatus
->pr_ppid
= tswap32(prstatus
->pr_ppid
);
1930 prstatus
->pr_pgrp
= tswap32(prstatus
->pr_pgrp
);
1931 prstatus
->pr_sid
= tswap32(prstatus
->pr_sid
);
1932 /* cpu times are not filled, so we skip them */
1933 /* regs should be in correct format already */
1934 prstatus
->pr_fpvalid
= tswap32(prstatus
->pr_fpvalid
);
1937 static void bswap_psinfo(struct elf_prpsinfo
*psinfo
)
1939 psinfo
->pr_flag
= tswapl(psinfo
->pr_flag
);
1940 psinfo
->pr_uid
= tswap16(psinfo
->pr_uid
);
1941 psinfo
->pr_gid
= tswap16(psinfo
->pr_gid
);
1942 psinfo
->pr_pid
= tswap32(psinfo
->pr_pid
);
1943 psinfo
->pr_ppid
= tswap32(psinfo
->pr_ppid
);
1944 psinfo
->pr_pgrp
= tswap32(psinfo
->pr_pgrp
);
1945 psinfo
->pr_sid
= tswap32(psinfo
->pr_sid
);
1947 #endif /* BSWAP_NEEDED */
1950 * Minimal support for linux memory regions. These are needed
1951 * when we are finding out what memory exactly belongs to
1952 * emulated process. No locks needed here, as long as
1953 * thread that received the signal is stopped.
1956 static struct mm_struct
*vma_init(void)
1958 struct mm_struct
*mm
;
1960 if ((mm
= qemu_malloc(sizeof (*mm
))) == NULL
)
1964 TAILQ_INIT(&mm
->mm_mmap
);
1969 static void vma_delete(struct mm_struct
*mm
)
1971 struct vm_area_struct
*vma
;
1973 while ((vma
= vma_first(mm
)) != NULL
) {
1974 TAILQ_REMOVE(&mm
->mm_mmap
, vma
, vma_link
);
1980 static int vma_add_mapping(struct mm_struct
*mm
, abi_ulong start
,
1981 abi_ulong end
, abi_ulong flags
)
1983 struct vm_area_struct
*vma
;
1985 if ((vma
= qemu_mallocz(sizeof (*vma
))) == NULL
)
1988 vma
->vma_start
= start
;
1990 vma
->vma_flags
= flags
;
1992 TAILQ_INSERT_TAIL(&mm
->mm_mmap
, vma
, vma_link
);
1998 static struct vm_area_struct
*vma_first(const struct mm_struct
*mm
)
2000 return (TAILQ_FIRST(&mm
->mm_mmap
));
2003 static struct vm_area_struct
*vma_next(struct vm_area_struct
*vma
)
2005 return (TAILQ_NEXT(vma
, vma_link
));
2008 static int vma_get_mapping_count(const struct mm_struct
*mm
)
2010 return (mm
->mm_count
);
2014 * Calculate file (dump) size of given memory region.
2016 static abi_ulong
vma_dump_size(const struct vm_area_struct
*vma
)
2018 /* if we cannot even read the first page, skip it */
2019 if (!access_ok(VERIFY_READ
, vma
->vma_start
, TARGET_PAGE_SIZE
))
2023 * Usually we don't dump executable pages as they contain
2024 * non-writable code that debugger can read directly from
2025 * target library etc. However, thread stacks are marked
2026 * also executable so we read in first page of given region
2027 * and check whether it contains elf header. If there is
2028 * no elf header, we dump it.
2030 if (vma
->vma_flags
& PROT_EXEC
) {
2031 char page
[TARGET_PAGE_SIZE
];
2033 copy_from_user(page
, vma
->vma_start
, sizeof (page
));
2034 if ((page
[EI_MAG0
] == ELFMAG0
) &&
2035 (page
[EI_MAG1
] == ELFMAG1
) &&
2036 (page
[EI_MAG2
] == ELFMAG2
) &&
2037 (page
[EI_MAG3
] == ELFMAG3
)) {
2039 * Mappings are possibly from ELF binary. Don't dump
2046 return (vma
->vma_end
- vma
->vma_start
);
2049 static int vma_walker(void *priv
, unsigned long start
, unsigned long end
,
2050 unsigned long flags
)
2052 struct mm_struct
*mm
= (struct mm_struct
*)priv
;
2055 * Don't dump anything that qemu has reserved for internal use.
2057 if (flags
& PAGE_RESERVED
)
2060 vma_add_mapping(mm
, start
, end
, flags
);
2064 static void fill_note(struct memelfnote
*note
, const char *name
, int type
,
2065 unsigned int sz
, void *data
)
2067 unsigned int namesz
;
2069 namesz
= strlen(name
) + 1;
2071 note
->namesz
= namesz
;
2072 note
->namesz_rounded
= roundup(namesz
, sizeof (int32_t));
2074 note
->datasz
= roundup(sz
, sizeof (int32_t));;
2078 * We calculate rounded up note size here as specified by
2081 note
->notesz
= sizeof (struct elf_note
) +
2082 note
->namesz_rounded
+ note
->datasz
;
2085 static void fill_elf_header(struct elfhdr
*elf
, int segs
, uint16_t machine
,
2088 (void) memset(elf
, 0, sizeof(*elf
));
2090 (void) memcpy(elf
->e_ident
, ELFMAG
, SELFMAG
);
2091 elf
->e_ident
[EI_CLASS
] = ELF_CLASS
;
2092 elf
->e_ident
[EI_DATA
] = ELF_DATA
;
2093 elf
->e_ident
[EI_VERSION
] = EV_CURRENT
;
2094 elf
->e_ident
[EI_OSABI
] = ELF_OSABI
;
2096 elf
->e_type
= ET_CORE
;
2097 elf
->e_machine
= machine
;
2098 elf
->e_version
= EV_CURRENT
;
2099 elf
->e_phoff
= sizeof(struct elfhdr
);
2100 elf
->e_flags
= flags
;
2101 elf
->e_ehsize
= sizeof(struct elfhdr
);
2102 elf
->e_phentsize
= sizeof(struct elf_phdr
);
2103 elf
->e_phnum
= segs
;
2110 static void fill_elf_note_phdr(struct elf_phdr
*phdr
, int sz
, off_t offset
)
2112 phdr
->p_type
= PT_NOTE
;
2113 phdr
->p_offset
= offset
;
2116 phdr
->p_filesz
= sz
;
2126 static size_t note_size(const struct memelfnote
*note
)
2128 return (note
->notesz
);
2131 static void fill_prstatus(struct elf_prstatus
*prstatus
,
2132 const TaskState
*ts
, int signr
)
2134 (void) memset(prstatus
, 0, sizeof (*prstatus
));
2135 prstatus
->pr_info
.si_signo
= prstatus
->pr_cursig
= signr
;
2136 prstatus
->pr_pid
= ts
->ts_tid
;
2137 prstatus
->pr_ppid
= getppid();
2138 prstatus
->pr_pgrp
= getpgrp();
2139 prstatus
->pr_sid
= getsid(0);
2142 bswap_prstatus(prstatus
);
2146 static int fill_psinfo(struct elf_prpsinfo
*psinfo
, const TaskState
*ts
)
2148 char *filename
, *base_filename
;
2149 unsigned int i
, len
;
2151 (void) memset(psinfo
, 0, sizeof (*psinfo
));
2153 len
= ts
->info
->arg_end
- ts
->info
->arg_start
;
2154 if (len
>= ELF_PRARGSZ
)
2155 len
= ELF_PRARGSZ
- 1;
2156 if (copy_from_user(&psinfo
->pr_psargs
, ts
->info
->arg_start
, len
))
2158 for (i
= 0; i
< len
; i
++)
2159 if (psinfo
->pr_psargs
[i
] == 0)
2160 psinfo
->pr_psargs
[i
] = ' ';
2161 psinfo
->pr_psargs
[len
] = 0;
2163 psinfo
->pr_pid
= getpid();
2164 psinfo
->pr_ppid
= getppid();
2165 psinfo
->pr_pgrp
= getpgrp();
2166 psinfo
->pr_sid
= getsid(0);
2167 psinfo
->pr_uid
= getuid();
2168 psinfo
->pr_gid
= getgid();
2170 filename
= strdup(ts
->bprm
->filename
);
2171 base_filename
= strdup(basename(filename
));
2172 (void) strncpy(psinfo
->pr_fname
, base_filename
,
2173 sizeof(psinfo
->pr_fname
));
2174 free(base_filename
);
2178 bswap_psinfo(psinfo
);
2183 static void fill_auxv_note(struct memelfnote
*note
, const TaskState
*ts
)
2185 elf_addr_t auxv
= (elf_addr_t
)ts
->info
->saved_auxv
;
2186 elf_addr_t orig_auxv
= auxv
;
2192 * Auxiliary vector is stored in target process stack. It contains
2193 * {type, value} pairs that we need to dump into note. This is not
2194 * strictly necessary but we do it here for sake of completeness.
2197 /* find out lenght of the vector, AT_NULL is terminator */
2200 get_user_ual(val
, auxv
);
2202 auxv
+= 2 * sizeof (elf_addr_t
);
2203 } while (val
!= AT_NULL
);
2204 len
= i
* sizeof (elf_addr_t
);
2206 /* read in whole auxv vector and copy it to memelfnote */
2207 ptr
= lock_user(VERIFY_READ
, orig_auxv
, len
, 0);
2209 fill_note(note
, "CORE", NT_AUXV
, len
, ptr
);
2210 unlock_user(ptr
, auxv
, len
);
2215 * Constructs name of coredump file. We have following convention
2217 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
2219 * Returns 0 in case of success, -1 otherwise (errno is set).
2221 static int core_dump_filename(const TaskState
*ts
, char *buf
,
2225 char *filename
= NULL
;
2226 char *base_filename
= NULL
;
2230 assert(bufsize
>= PATH_MAX
);
2232 if (gettimeofday(&tv
, NULL
) < 0) {
2233 (void) fprintf(stderr
, "unable to get current timestamp: %s",
2238 filename
= strdup(ts
->bprm
->filename
);
2239 base_filename
= strdup(basename(filename
));
2240 (void) strftime(timestamp
, sizeof (timestamp
), "%Y%m%d-%H%M%S",
2241 localtime_r(&tv
.tv_sec
, &tm
));
2242 (void) snprintf(buf
, bufsize
, "qemu_%s_%s_%d.core",
2243 base_filename
, timestamp
, (int)getpid());
2244 free(base_filename
);
2250 static int dump_write(int fd
, const void *ptr
, size_t size
)
2252 const char *bufp
= (const char *)ptr
;
2253 ssize_t bytes_written
, bytes_left
;
2254 struct rlimit dumpsize
;
2258 getrlimit(RLIMIT_CORE
, &dumpsize
);
2259 if ((pos
= lseek(fd
, 0, SEEK_CUR
))==-1) {
2260 if (errno
== ESPIPE
) { /* not a seekable stream */
2266 if (dumpsize
.rlim_cur
<= pos
) {
2268 } else if (dumpsize
.rlim_cur
== RLIM_INFINITY
) {
2271 size_t limit_left
=dumpsize
.rlim_cur
- pos
;
2272 bytes_left
= limit_left
>= size
? size
: limit_left
;
2277 * In normal conditions, single write(2) should do but
2278 * in case of socket etc. this mechanism is more portable.
2281 bytes_written
= write(fd
, bufp
, bytes_left
);
2282 if (bytes_written
< 0) {
2286 } else if (bytes_written
== 0) { /* eof */
2289 bufp
+= bytes_written
;
2290 bytes_left
-= bytes_written
;
2291 } while (bytes_left
> 0);
2296 static int write_note(struct memelfnote
*men
, int fd
)
2300 en
.n_namesz
= men
->namesz
;
2301 en
.n_type
= men
->type
;
2302 en
.n_descsz
= men
->datasz
;
2308 if (dump_write(fd
, &en
, sizeof(en
)) != 0)
2310 if (dump_write(fd
, men
->name
, men
->namesz_rounded
) != 0)
2312 if (dump_write(fd
, men
->data
, men
->datasz
) != 0)
2318 static void fill_thread_info(struct elf_note_info
*info
, const CPUState
*env
)
2320 TaskState
*ts
= (TaskState
*)env
->opaque
;
2321 struct elf_thread_status
*ets
;
2323 ets
= qemu_mallocz(sizeof (*ets
));
2324 ets
->num_notes
= 1; /* only prstatus is dumped */
2325 fill_prstatus(&ets
->prstatus
, ts
, 0);
2326 elf_core_copy_regs(&ets
->prstatus
.pr_reg
, env
);
2327 fill_note(&ets
->notes
[0], "CORE", NT_PRSTATUS
, sizeof (ets
->prstatus
),
2330 TAILQ_INSERT_TAIL(&info
->thread_list
, ets
, ets_link
);
2332 info
->notes_size
+= note_size(&ets
->notes
[0]);
2335 static int fill_note_info(struct elf_note_info
*info
,
2336 long signr
, const CPUState
*env
)
2339 CPUState
*cpu
= NULL
;
2340 TaskState
*ts
= (TaskState
*)env
->opaque
;
2343 (void) memset(info
, 0, sizeof (*info
));
2345 TAILQ_INIT(&info
->thread_list
);
2347 info
->notes
= qemu_mallocz(NUMNOTES
* sizeof (struct memelfnote
));
2348 if (info
->notes
== NULL
)
2350 info
->prstatus
= qemu_mallocz(sizeof (*info
->prstatus
));
2351 if (info
->prstatus
== NULL
)
2353 info
->psinfo
= qemu_mallocz(sizeof (*info
->psinfo
));
2354 if (info
->prstatus
== NULL
)
2358 * First fill in status (and registers) of current thread
2359 * including process info & aux vector.
2361 fill_prstatus(info
->prstatus
, ts
, signr
);
2362 elf_core_copy_regs(&info
->prstatus
->pr_reg
, env
);
2363 fill_note(&info
->notes
[0], "CORE", NT_PRSTATUS
,
2364 sizeof (*info
->prstatus
), info
->prstatus
);
2365 fill_psinfo(info
->psinfo
, ts
);
2366 fill_note(&info
->notes
[1], "CORE", NT_PRPSINFO
,
2367 sizeof (*info
->psinfo
), info
->psinfo
);
2368 fill_auxv_note(&info
->notes
[2], ts
);
2371 info
->notes_size
= 0;
2372 for (i
= 0; i
< info
->numnote
; i
++)
2373 info
->notes_size
+= note_size(&info
->notes
[i
]);
2375 /* read and fill status of all threads */
2377 for (cpu
= first_cpu
; cpu
!= NULL
; cpu
= cpu
->next_cpu
) {
2378 if (cpu
== thread_env
)
2380 fill_thread_info(info
, cpu
);
2387 static void free_note_info(struct elf_note_info
*info
)
2389 struct elf_thread_status
*ets
;
2391 while (!TAILQ_EMPTY(&info
->thread_list
)) {
2392 ets
= TAILQ_FIRST(&info
->thread_list
);
2393 TAILQ_REMOVE(&info
->thread_list
, ets
, ets_link
);
2397 qemu_free(info
->prstatus
);
2398 qemu_free(info
->psinfo
);
2399 qemu_free(info
->notes
);
2402 static int write_note_info(struct elf_note_info
*info
, int fd
)
2404 struct elf_thread_status
*ets
;
2407 /* write prstatus, psinfo and auxv for current thread */
2408 for (i
= 0; i
< info
->numnote
; i
++)
2409 if ((error
= write_note(&info
->notes
[i
], fd
)) != 0)
2412 /* write prstatus for each thread */
2413 for (ets
= info
->thread_list
.tqh_first
; ets
!= NULL
;
2414 ets
= ets
->ets_link
.tqe_next
) {
2415 if ((error
= write_note(&ets
->notes
[0], fd
)) != 0)
2423 * Write out ELF coredump.
2425 * See documentation of ELF object file format in:
2426 * http://www.caldera.com/developers/devspecs/gabi41.pdf
2428 * Coredump format in linux is following:
2430 * 0 +----------------------+ \
2431 * | ELF header | ET_CORE |
2432 * +----------------------+ |
2433 * | ELF program headers | |--- headers
2434 * | - NOTE section | |
2435 * | - PT_LOAD sections | |
2436 * +----------------------+ /
2441 * +----------------------+ <-- aligned to target page
2442 * | Process memory dump |
2447 * +----------------------+
2449 * NT_PRSTATUS -> struct elf_prstatus (per thread)
2450 * NT_PRSINFO -> struct elf_prpsinfo
2451 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
2453 * Format follows System V format as close as possible. Current
2454 * version limitations are as follows:
2455 * - no floating point registers are dumped
2457 * Function returns 0 in case of success, negative errno otherwise.
2459 * TODO: make this work also during runtime: it should be
2460 * possible to force coredump from running process and then
2461 * continue processing. For example qemu could set up SIGUSR2
2462 * handler (provided that target process haven't registered
2463 * handler for that) that does the dump when signal is received.
2465 static int elf_core_dump(int signr
, const CPUState
*env
)
2467 const TaskState
*ts
= (const TaskState
*)env
->opaque
;
2468 struct vm_area_struct
*vma
= NULL
;
2469 char corefile
[PATH_MAX
];
2470 struct elf_note_info info
;
2472 struct elf_phdr phdr
;
2473 struct rlimit dumpsize
;
2474 struct mm_struct
*mm
= NULL
;
2475 off_t offset
= 0, data_offset
= 0;
2480 getrlimit(RLIMIT_CORE
, &dumpsize
);
2481 if (dumpsize
.rlim_cur
== 0)
2484 if (core_dump_filename(ts
, corefile
, sizeof (corefile
)) < 0)
2487 if ((fd
= open(corefile
, O_WRONLY
| O_CREAT
,
2488 S_IRUSR
|S_IWUSR
|S_IRGRP
|S_IROTH
)) < 0)
2492 * Walk through target process memory mappings and
2493 * set up structure containing this information. After
2494 * this point vma_xxx functions can be used.
2496 if ((mm
= vma_init()) == NULL
)
2499 walk_memory_regions(mm
, vma_walker
);
2500 segs
= vma_get_mapping_count(mm
);
2503 * Construct valid coredump ELF header. We also
2504 * add one more segment for notes.
2506 fill_elf_header(&elf
, segs
+ 1, ELF_MACHINE
, 0);
2507 if (dump_write(fd
, &elf
, sizeof (elf
)) != 0)
2510 /* fill in in-memory version of notes */
2511 if (fill_note_info(&info
, signr
, env
) < 0)
2514 offset
+= sizeof (elf
); /* elf header */
2515 offset
+= (segs
+ 1) * sizeof (struct elf_phdr
); /* program headers */
2517 /* write out notes program header */
2518 fill_elf_note_phdr(&phdr
, info
.notes_size
, offset
);
2520 offset
+= info
.notes_size
;
2521 if (dump_write(fd
, &phdr
, sizeof (phdr
)) != 0)
2525 * ELF specification wants data to start at page boundary so
2528 offset
= roundup(offset
, ELF_EXEC_PAGESIZE
);
2531 * Write program headers for memory regions mapped in
2532 * the target process.
2534 for (vma
= vma_first(mm
); vma
!= NULL
; vma
= vma_next(vma
)) {
2535 (void) memset(&phdr
, 0, sizeof (phdr
));
2537 phdr
.p_type
= PT_LOAD
;
2538 phdr
.p_offset
= offset
;
2539 phdr
.p_vaddr
= vma
->vma_start
;
2541 phdr
.p_filesz
= vma_dump_size(vma
);
2542 offset
+= phdr
.p_filesz
;
2543 phdr
.p_memsz
= vma
->vma_end
- vma
->vma_start
;
2544 phdr
.p_flags
= vma
->vma_flags
& PROT_READ
? PF_R
: 0;
2545 if (vma
->vma_flags
& PROT_WRITE
)
2546 phdr
.p_flags
|= PF_W
;
2547 if (vma
->vma_flags
& PROT_EXEC
)
2548 phdr
.p_flags
|= PF_X
;
2549 phdr
.p_align
= ELF_EXEC_PAGESIZE
;
2551 dump_write(fd
, &phdr
, sizeof (phdr
));
2555 * Next we write notes just after program headers. No
2556 * alignment needed here.
2558 if (write_note_info(&info
, fd
) < 0)
2561 /* align data to page boundary */
2562 data_offset
= lseek(fd
, 0, SEEK_CUR
);
2563 data_offset
= TARGET_PAGE_ALIGN(data_offset
);
2564 if (lseek(fd
, data_offset
, SEEK_SET
) != data_offset
)
2568 * Finally we can dump process memory into corefile as well.
2570 for (vma
= vma_first(mm
); vma
!= NULL
; vma
= vma_next(vma
)) {
2574 end
= vma
->vma_start
+ vma_dump_size(vma
);
2576 for (addr
= vma
->vma_start
; addr
< end
;
2577 addr
+= TARGET_PAGE_SIZE
) {
2578 char page
[TARGET_PAGE_SIZE
];
2582 * Read in page from target process memory and
2583 * write it to coredump file.
2585 error
= copy_from_user(page
, addr
, sizeof (page
));
2587 (void) fprintf(stderr
, "unable to dump " TARGET_FMT_lx
"\n",
2592 if (dump_write(fd
, page
, TARGET_PAGE_SIZE
) < 0)
2598 free_note_info(&info
);
2608 #endif /* USE_ELF_CORE_DUMP */
2610 static int load_aout_interp(void * exptr
, int interp_fd
)
2612 printf("a.out interpreter not yet supported\n");
2616 void do_init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
)
2618 init_thread(regs
, infop
);