2 * Generic Dynamic compiler generator
4 * Copyright (c) 2003 Fabrice Bellard
6 * The COFF object format support was extracted from Kazu's QEMU port
9 * Mach-O Support by Matt Reda and Pierre d'Herbemont
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include "config-host.h"
35 /* NOTE: we test CONFIG_WIN32 instead of _WIN32 to enabled cross
37 #if defined(CONFIG_WIN32)
38 #define CONFIG_FORMAT_COFF
39 #elif defined(CONFIG_DARWIN)
40 #define CONFIG_FORMAT_MACH
42 #define CONFIG_FORMAT_ELF
45 #ifdef CONFIG_FORMAT_ELF
47 /* elf format definitions. We use these macros to test the CPU to
48 allow cross compilation (this tool must be ran on the build
50 #if defined(HOST_I386)
52 #define ELF_CLASS ELFCLASS32
53 #define ELF_ARCH EM_386
54 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
55 #undef ELF_USES_RELOCA
57 #elif defined(HOST_X86_64)
59 #define ELF_CLASS ELFCLASS64
60 #define ELF_ARCH EM_X86_64
61 #define elf_check_arch(x) ((x) == EM_X86_64)
62 #define ELF_USES_RELOCA
64 #elif defined(HOST_PPC)
66 #define ELF_CLASS ELFCLASS32
67 #define ELF_ARCH EM_PPC
68 #define elf_check_arch(x) ((x) == EM_PPC)
69 #define ELF_USES_RELOCA
71 #elif defined(HOST_S390)
73 #define ELF_CLASS ELFCLASS32
74 #define ELF_ARCH EM_S390
75 #define elf_check_arch(x) ((x) == EM_S390)
76 #define ELF_USES_RELOCA
78 #elif defined(HOST_ALPHA)
80 #define ELF_CLASS ELFCLASS64
81 #define ELF_ARCH EM_ALPHA
82 #define elf_check_arch(x) ((x) == EM_ALPHA)
83 #define ELF_USES_RELOCA
85 #elif defined(HOST_IA64)
87 #define ELF_CLASS ELFCLASS64
88 #define ELF_ARCH EM_IA_64
89 #define elf_check_arch(x) ((x) == EM_IA_64)
90 #define ELF_USES_RELOCA
92 #elif defined(HOST_SPARC)
94 #define ELF_CLASS ELFCLASS32
95 #define ELF_ARCH EM_SPARC
96 #define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
97 #define ELF_USES_RELOCA
99 #elif defined(HOST_SPARC64)
101 #define ELF_CLASS ELFCLASS64
102 #define ELF_ARCH EM_SPARCV9
103 #define elf_check_arch(x) ((x) == EM_SPARCV9)
104 #define ELF_USES_RELOCA
106 #elif defined(HOST_ARM)
108 #define ELF_CLASS ELFCLASS32
109 #define ELF_ARCH EM_ARM
110 #define elf_check_arch(x) ((x) == EM_ARM)
111 #define ELF_USES_RELOC
113 #elif defined(HOST_M68K)
115 #define ELF_CLASS ELFCLASS32
116 #define ELF_ARCH EM_68K
117 #define elf_check_arch(x) ((x) == EM_68K)
118 #define ELF_USES_RELOCA
121 #error unsupported CPU - please update the code
126 #if ELF_CLASS == ELFCLASS32
127 typedef int32_t host_long
;
128 typedef uint32_t host_ulong
;
129 #define swabls(x) swab32s(x)
131 typedef int64_t host_long
;
132 typedef uint64_t host_ulong
;
133 #define swabls(x) swab64s(x)
136 #ifdef ELF_USES_RELOCA
137 #define SHT_RELOC SHT_RELA
139 #define SHT_RELOC SHT_REL
142 #define EXE_RELOC ELF_RELOC
143 #define EXE_SYM ElfW(Sym)
145 #endif /* CONFIG_FORMAT_ELF */
147 #ifdef CONFIG_FORMAT_COFF
151 typedef int32_t host_long
;
152 typedef uint32_t host_ulong
;
154 #define FILENAMELEN 256
156 typedef struct coff_sym
{
157 struct external_syment
*st_syment
;
158 char st_name
[FILENAMELEN
];
165 typedef struct coff_rel
{
166 struct external_reloc
*r_reloc
;
171 #define EXE_RELOC struct coff_rel
172 #define EXE_SYM struct coff_sym
174 #endif /* CONFIG_FORMAT_COFF */
176 #ifdef CONFIG_FORMAT_MACH
178 #include <mach-o/loader.h>
179 #include <mach-o/nlist.h>
180 #include <mach-o/reloc.h>
181 #include <mach-o/ppc/reloc.h>
183 # define check_mach_header(x) (x.magic == MH_MAGIC)
184 typedef int32_t host_long
;
185 typedef uint32_t host_ulong
;
187 struct nlist_extended
193 unsigned char n_type
;
194 unsigned char n_sect
;
196 unsigned long st_value
;
197 unsigned long st_size
;
200 #define EXE_RELOC struct relocation_info
201 #define EXE_SYM struct nlist_extended
203 #endif /* CONFIG_FORMAT_MACH */
213 /* all dynamically generated functions begin with this code */
214 #define OP_PREFIX "op_"
218 void __attribute__((noreturn
)) __attribute__((format (printf
, 1, 2))) error(const char *fmt
, ...)
222 fprintf(stderr
, "dyngen: ");
223 vfprintf(stderr
, fmt
, ap
);
224 fprintf(stderr
, "\n");
229 void *load_data(int fd
, long offset
, unsigned int size
)
236 lseek(fd
, offset
, SEEK_SET
);
237 if (read(fd
, data
, size
) != size
) {
244 int strstart(const char *str
, const char *val
, const char **ptr
)
260 void pstrcpy(char *buf
, int buf_size
, const char *str
)
270 if (c
== 0 || q
>= buf
+ buf_size
- 1)
277 void swab16s(uint16_t *p
)
282 void swab32s(uint32_t *p
)
287 void swab64s(uint64_t *p
)
292 uint16_t get16(uint16_t *p
)
301 uint32_t get32(uint32_t *p
)
310 void put16(uint16_t *p
, uint16_t val
)
317 void put32(uint32_t *p
, uint32_t val
)
324 /* executable information */
332 #ifdef CONFIG_FORMAT_ELF
335 struct elf_shdr
*shdr
;
340 int elf_must_swap(struct elfhdr
*h
)
348 return (h
->e_ident
[EI_DATA
] == ELFDATA2MSB
) !=
349 (swaptest
.b
[0] == 0);
352 void elf_swap_ehdr(struct elfhdr
*h
)
354 swab16s(&h
->e_type
); /* Object file type */
355 swab16s(&h
-> e_machine
); /* Architecture */
356 swab32s(&h
-> e_version
); /* Object file version */
357 swabls(&h
-> e_entry
); /* Entry point virtual address */
358 swabls(&h
-> e_phoff
); /* Program header table file offset */
359 swabls(&h
-> e_shoff
); /* Section header table file offset */
360 swab32s(&h
-> e_flags
); /* Processor-specific flags */
361 swab16s(&h
-> e_ehsize
); /* ELF header size in bytes */
362 swab16s(&h
-> e_phentsize
); /* Program header table entry size */
363 swab16s(&h
-> e_phnum
); /* Program header table entry count */
364 swab16s(&h
-> e_shentsize
); /* Section header table entry size */
365 swab16s(&h
-> e_shnum
); /* Section header table entry count */
366 swab16s(&h
-> e_shstrndx
); /* Section header string table index */
369 void elf_swap_shdr(struct elf_shdr
*h
)
371 swab32s(&h
-> sh_name
); /* Section name (string tbl index) */
372 swab32s(&h
-> sh_type
); /* Section type */
373 swabls(&h
-> sh_flags
); /* Section flags */
374 swabls(&h
-> sh_addr
); /* Section virtual addr at execution */
375 swabls(&h
-> sh_offset
); /* Section file offset */
376 swabls(&h
-> sh_size
); /* Section size in bytes */
377 swab32s(&h
-> sh_link
); /* Link to another section */
378 swab32s(&h
-> sh_info
); /* Additional section information */
379 swabls(&h
-> sh_addralign
); /* Section alignment */
380 swabls(&h
-> sh_entsize
); /* Entry size if section holds table */
383 void elf_swap_phdr(struct elf_phdr
*h
)
385 swab32s(&h
->p_type
); /* Segment type */
386 swabls(&h
->p_offset
); /* Segment file offset */
387 swabls(&h
->p_vaddr
); /* Segment virtual address */
388 swabls(&h
->p_paddr
); /* Segment physical address */
389 swabls(&h
->p_filesz
); /* Segment size in file */
390 swabls(&h
->p_memsz
); /* Segment size in memory */
391 swab32s(&h
->p_flags
); /* Segment flags */
392 swabls(&h
->p_align
); /* Segment alignment */
395 void elf_swap_rel(ELF_RELOC
*rel
)
397 swabls(&rel
->r_offset
);
398 swabls(&rel
->r_info
);
399 #ifdef ELF_USES_RELOCA
400 swabls(&rel
->r_addend
);
404 struct elf_shdr
*find_elf_section(struct elf_shdr
*shdr
, int shnum
, const char *shstr
,
409 struct elf_shdr
*sec
;
411 for(i
= 0; i
< shnum
; i
++) {
415 shname
= shstr
+ sec
->sh_name
;
416 if (!strcmp(shname
, name
))
422 int find_reloc(int sh_index
)
424 struct elf_shdr
*sec
;
427 for(i
= 0; i
< ehdr
.e_shnum
; i
++) {
429 if (sec
->sh_type
== SHT_RELOC
&& sec
->sh_info
== sh_index
)
435 static host_ulong
get_rel_offset(EXE_RELOC
*rel
)
437 return rel
->r_offset
;
440 static char *get_rel_sym_name(EXE_RELOC
*rel
)
442 return strtab
+ symtab
[ELFW(R_SYM
)(rel
->r_info
)].st_name
;
445 static char *get_sym_name(EXE_SYM
*sym
)
447 return strtab
+ sym
->st_name
;
450 /* load an elf object file */
451 int load_object(const char *filename
)
454 struct elf_shdr
*sec
, *symtab_sec
, *strtab_sec
, *text_sec
;
460 fd
= open(filename
, O_RDONLY
);
462 error("can't open file '%s'", filename
);
464 /* Read ELF header. */
465 if (read(fd
, &ehdr
, sizeof (ehdr
)) != sizeof (ehdr
))
466 error("unable to read file header");
468 /* Check ELF identification. */
469 if (ehdr
.e_ident
[EI_MAG0
] != ELFMAG0
470 || ehdr
.e_ident
[EI_MAG1
] != ELFMAG1
471 || ehdr
.e_ident
[EI_MAG2
] != ELFMAG2
472 || ehdr
.e_ident
[EI_MAG3
] != ELFMAG3
473 || ehdr
.e_ident
[EI_VERSION
] != EV_CURRENT
) {
474 error("bad ELF header");
477 do_swap
= elf_must_swap(&ehdr
);
479 elf_swap_ehdr(&ehdr
);
480 if (ehdr
.e_ident
[EI_CLASS
] != ELF_CLASS
)
481 error("Unsupported ELF class");
482 if (ehdr
.e_type
!= ET_REL
)
483 error("ELF object file expected");
484 if (ehdr
.e_version
!= EV_CURRENT
)
485 error("Invalid ELF version");
486 if (!elf_check_arch(ehdr
.e_machine
))
487 error("Unsupported CPU (e_machine=%d)", ehdr
.e_machine
);
489 /* read section headers */
490 shdr
= load_data(fd
, ehdr
.e_shoff
, ehdr
.e_shnum
* sizeof(struct elf_shdr
));
492 for(i
= 0; i
< ehdr
.e_shnum
; i
++) {
493 elf_swap_shdr(&shdr
[i
]);
497 /* read all section data */
498 sdata
= malloc(sizeof(void *) * ehdr
.e_shnum
);
499 memset(sdata
, 0, sizeof(void *) * ehdr
.e_shnum
);
501 for(i
= 0;i
< ehdr
.e_shnum
; i
++) {
503 if (sec
->sh_type
!= SHT_NOBITS
)
504 sdata
[i
] = load_data(fd
, sec
->sh_offset
, sec
->sh_size
);
507 sec
= &shdr
[ehdr
.e_shstrndx
];
508 shstr
= sdata
[ehdr
.e_shstrndx
];
510 /* swap relocations */
511 for(i
= 0; i
< ehdr
.e_shnum
; i
++) {
513 if (sec
->sh_type
== SHT_RELOC
) {
514 nb_relocs
= sec
->sh_size
/ sec
->sh_entsize
;
516 for(j
= 0, rel
= (ELF_RELOC
*)sdata
[i
]; j
< nb_relocs
; j
++, rel
++)
523 text_sec
= find_elf_section(shdr
, ehdr
.e_shnum
, shstr
, ".text");
525 error("could not find .text section");
526 text_shndx
= text_sec
- shdr
;
527 text
= sdata
[text_shndx
];
529 /* find text relocations, if any */
532 i
= find_reloc(text_shndx
);
534 relocs
= (ELF_RELOC
*)sdata
[i
];
535 nb_relocs
= shdr
[i
].sh_size
/ shdr
[i
].sh_entsize
;
538 symtab_sec
= find_elf_section(shdr
, ehdr
.e_shnum
, shstr
, ".symtab");
540 error("could not find .symtab section");
541 strtab_sec
= &shdr
[symtab_sec
->sh_link
];
543 symtab
= (ElfW(Sym
) *)sdata
[symtab_sec
- shdr
];
544 strtab
= sdata
[symtab_sec
->sh_link
];
546 nb_syms
= symtab_sec
->sh_size
/ sizeof(ElfW(Sym
));
548 for(i
= 0, sym
= symtab
; i
< nb_syms
; i
++, sym
++) {
549 swab32s(&sym
->st_name
);
550 swabls(&sym
->st_value
);
551 swabls(&sym
->st_size
);
552 swab16s(&sym
->st_shndx
);
559 #endif /* CONFIG_FORMAT_ELF */
561 #ifdef CONFIG_FORMAT_COFF
564 struct external_scnhdr
*shdr
;
566 struct external_filehdr fhdr
;
567 struct external_syment
*coff_symtab
;
569 int coff_text_shndx
, coff_data_shndx
;
573 #define STRTAB_SIZE 4
578 #define T_FUNCTION 0x20
581 void sym_ent_name(struct external_syment
*ext_sym
, EXE_SYM
*sym
)
586 if (ext_sym
->e
.e
.e_zeroes
!= 0) {
588 for(i
= 0; i
< 8; i
++) {
589 c
= ext_sym
->e
.e_name
[i
];
596 pstrcpy(sym
->st_name
, sizeof(sym
->st_name
), strtab
+ ext_sym
->e
.e
.e_offset
);
599 /* now convert the name to a C name (suppress the leading '_') */
600 if (sym
->st_name
[0] == '_') {
601 len
= strlen(sym
->st_name
);
602 memmove(sym
->st_name
, sym
->st_name
+ 1, len
- 1);
603 sym
->st_name
[len
- 1] = '\0';
607 char *name_for_dotdata(struct coff_rel
*rel
)
610 struct coff_sym
*sym
;
613 text_data
= *(uint32_t *)(text
+ rel
->r_offset
);
615 for (i
= 0, sym
= symtab
; i
< nb_syms
; i
++, sym
++) {
616 if (sym
->st_syment
->e_scnum
== data_shndx
&&
617 text_data
>= sym
->st_value
&&
618 text_data
< sym
->st_value
+ sym
->st_size
) {
627 static char *get_sym_name(EXE_SYM
*sym
)
632 static char *get_rel_sym_name(EXE_RELOC
*rel
)
635 name
= get_sym_name(symtab
+ *(uint32_t *)(rel
->r_reloc
->r_symndx
));
636 if (!strcmp(name
, ".data"))
637 name
= name_for_dotdata(rel
);
641 static host_ulong
get_rel_offset(EXE_RELOC
*rel
)
643 return rel
->r_offset
;
646 struct external_scnhdr
*find_coff_section(struct external_scnhdr
*shdr
, int shnum
, const char *name
)
650 struct external_scnhdr
*sec
;
652 for(i
= 0; i
< shnum
; i
++) {
656 shname
= sec
->s_name
;
657 if (!strcmp(shname
, name
))
663 /* load a coff object file */
664 int load_object(const char *filename
)
667 struct external_scnhdr
*sec
, *text_sec
, *data_sec
;
669 struct external_syment
*ext_sym
;
670 struct external_reloc
*coff_relocs
;
671 struct external_reloc
*ext_rel
;
676 fd
= open(filename
, O_RDONLY
682 error("can't open file '%s'", filename
);
684 /* Read COFF header. */
685 if (read(fd
, &fhdr
, sizeof (fhdr
)) != sizeof (fhdr
))
686 error("unable to read file header");
688 /* Check COFF identification. */
689 if (fhdr
.f_magic
!= I386MAGIC
) {
690 error("bad COFF header");
694 /* read section headers */
695 shdr
= load_data(fd
, sizeof(struct external_filehdr
) + fhdr
.f_opthdr
, fhdr
.f_nscns
* sizeof(struct external_scnhdr
));
697 /* read all section data */
698 sdata
= malloc(sizeof(void *) * fhdr
.f_nscns
);
699 memset(sdata
, 0, sizeof(void *) * fhdr
.f_nscns
);
702 for(i
= 0;i
< fhdr
.f_nscns
; i
++) {
704 if (!strstart(sec
->s_name
, ".bss", &p
))
705 sdata
[i
] = load_data(fd
, sec
->s_scnptr
, sec
->s_size
);
710 text_sec
= find_coff_section(shdr
, fhdr
.f_nscns
, ".text");
712 error("could not find .text section");
713 coff_text_shndx
= text_sec
- shdr
;
714 text
= sdata
[coff_text_shndx
];
717 data_sec
= find_coff_section(shdr
, fhdr
.f_nscns
, ".data");
719 error("could not find .data section");
720 coff_data_shndx
= data_sec
- shdr
;
722 coff_symtab
= load_data(fd
, fhdr
.f_symptr
, fhdr
.f_nsyms
*SYMESZ
);
723 for (i
= 0, ext_sym
= coff_symtab
; i
< nb_syms
; i
++, ext_sym
++) {
725 printf(" %02x", ((uint8_t *)ext_sym
->e
.e_name
)[i
]);
730 n_strtab
= load_data(fd
, (fhdr
.f_symptr
+ fhdr
.f_nsyms
*SYMESZ
), STRTAB_SIZE
);
731 strtab
= load_data(fd
, (fhdr
.f_symptr
+ fhdr
.f_nsyms
*SYMESZ
), *n_strtab
);
733 nb_syms
= fhdr
.f_nsyms
;
735 for (i
= 0, ext_sym
= coff_symtab
; i
< nb_syms
; i
++, ext_sym
++) {
736 if (strstart(ext_sym
->e
.e_name
, ".text", NULL
))
737 text_shndx
= ext_sym
->e_scnum
;
738 if (strstart(ext_sym
->e
.e_name
, ".data", NULL
))
739 data_shndx
= ext_sym
->e_scnum
;
742 /* set coff symbol */
743 symtab
= malloc(sizeof(struct coff_sym
) * nb_syms
);
746 for (i
= 0, ext_sym
= coff_symtab
, sym
= symtab
; i
< nb_syms
; i
++, ext_sym
++, sym
++) {
747 memset(sym
, 0, sizeof(*sym
));
748 sym
->st_syment
= ext_sym
;
749 sym_ent_name(ext_sym
, sym
);
750 sym
->st_value
= ext_sym
->e_value
;
752 aux_size
= *(int8_t *)ext_sym
->e_numaux
;
753 if (ext_sym
->e_scnum
== text_shndx
&& ext_sym
->e_type
== T_FUNCTION
) {
754 for (j
= aux_size
+ 1; j
< nb_syms
- i
; j
++) {
755 if ((ext_sym
+ j
)->e_scnum
== text_shndx
&&
756 (ext_sym
+ j
)->e_type
== T_FUNCTION
){
757 sym
->st_size
= (ext_sym
+ j
)->e_value
- ext_sym
->e_value
;
759 } else if (j
== nb_syms
- i
- 1) {
760 sec
= &shdr
[coff_text_shndx
];
761 sym
->st_size
= sec
->s_size
- ext_sym
->e_value
;
765 } else if (ext_sym
->e_scnum
== data_shndx
&& *(uint8_t *)ext_sym
->e_sclass
== C_EXTERNAL
) {
766 for (j
= aux_size
+ 1; j
< nb_syms
- i
; j
++) {
767 if ((ext_sym
+ j
)->e_scnum
== data_shndx
) {
768 sym
->st_size
= (ext_sym
+ j
)->e_value
- ext_sym
->e_value
;
770 } else if (j
== nb_syms
- i
- 1) {
771 sec
= &shdr
[coff_data_shndx
];
772 sym
->st_size
= sec
->s_size
- ext_sym
->e_value
;
780 sym
->st_type
= ext_sym
->e_type
;
781 sym
->st_shndx
= ext_sym
->e_scnum
;
785 /* find text relocations, if any */
786 sec
= &shdr
[coff_text_shndx
];
787 coff_relocs
= load_data(fd
, sec
->s_relptr
, sec
->s_nreloc
*RELSZ
);
788 nb_relocs
= sec
->s_nreloc
;
790 /* set coff relocation */
791 relocs
= malloc(sizeof(struct coff_rel
) * nb_relocs
);
792 for (i
= 0, ext_rel
= coff_relocs
, rel
= relocs
; i
< nb_relocs
;
793 i
++, ext_rel
++, rel
++) {
794 memset(rel
, 0, sizeof(*rel
));
795 rel
->r_reloc
= ext_rel
;
796 rel
->r_offset
= *(uint32_t *)ext_rel
->r_vaddr
;
797 rel
->r_type
= *(uint16_t *)ext_rel
->r_type
;
802 #endif /* CONFIG_FORMAT_COFF */
804 #ifdef CONFIG_FORMAT_MACH
807 struct mach_header mach_hdr
;
810 struct segment_command
*segment
= 0;
811 struct dysymtab_command
*dysymtabcmd
= 0;
812 struct symtab_command
*symtabcmd
= 0;
815 struct section
*section_hdr
;
816 struct section
*text_sec_hdr
;
820 struct relocation_info
*relocs
;
824 struct nlist
*symtab_std
;
827 /* indirect symbols */
830 /* Utility functions */
832 static inline char *find_str_by_index(int index
)
837 /* Used by dyngen common code */
838 static char *get_sym_name(EXE_SYM
*sym
)
840 char *name
= find_str_by_index(sym
->n_un
.n_strx
);
842 if ( sym
->n_type
& N_STAB
) /* Debug symbols are ignored */
853 /* find a section index given its segname, sectname */
854 static int find_mach_sec_index(struct section
*section_hdr
, int shnum
, const char *segname
,
855 const char *sectname
)
858 struct section
*sec
= section_hdr
;
860 for(i
= 0; i
< shnum
; i
++, sec
++) {
861 if (!sec
->segname
|| !sec
->sectname
)
863 if (!strcmp(sec
->sectname
, sectname
) && !strcmp(sec
->segname
, segname
))
869 /* find a section header given its segname, sectname */
870 struct section
*find_mach_sec_hdr(struct section
*section_hdr
, int shnum
, const char *segname
,
871 const char *sectname
)
873 int index
= find_mach_sec_index(section_hdr
, shnum
, segname
, sectname
);
876 return section_hdr
+index
;
880 static inline void fetch_next_pair_value(struct relocation_info
* rel
, unsigned int *value
)
882 struct scattered_relocation_info
* scarel
;
884 if(R_SCATTERED
& rel
->r_address
) {
885 scarel
= (struct scattered_relocation_info
*)rel
;
886 if(scarel
->r_type
!= PPC_RELOC_PAIR
)
887 error("fetch_next_pair_value: looking for a pair which was not found (1)");
888 *value
= scarel
->r_value
;
890 if(rel
->r_type
!= PPC_RELOC_PAIR
)
891 error("fetch_next_pair_value: looking for a pair which was not found (2)");
892 *value
= rel
->r_address
;
896 /* find a sym name given its value, in a section number */
897 static const char * find_sym_with_value_and_sec_number( int value
, int sectnum
, int * offset
)
901 for( i
= 0 ; i
< nb_syms
; i
++ )
903 if( !(symtab
[i
].n_type
& N_STAB
) && (symtab
[i
].n_type
& N_SECT
) &&
904 (symtab
[i
].n_sect
== sectnum
) && (symtab
[i
].st_value
<= value
) )
906 if( (ret
<0) || (symtab
[i
].st_value
>= symtab
[ret
].st_value
) )
914 *offset
= value
- symtab
[ret
].st_value
;
915 return get_sym_name(&symtab
[ret
]);
920 * Find symbol name given a (virtual) address, and a section which is of type
921 * S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
923 static const char * find_reloc_name_in_sec_ptr(int address
, struct section
* sec_hdr
)
925 unsigned int tocindex
, symindex
, size
;
926 const char *name
= 0;
929 if(!( address
>= sec_hdr
->addr
&& address
< (sec_hdr
->addr
+ sec_hdr
->size
) ) )
932 if( sec_hdr
->flags
& S_SYMBOL_STUBS
){
933 size
= sec_hdr
->reserved2
;
938 else if( sec_hdr
->flags
& S_LAZY_SYMBOL_POINTERS
||
939 sec_hdr
->flags
& S_NON_LAZY_SYMBOL_POINTERS
)
940 size
= sizeof(unsigned long);
944 /* Compute our index in toc */
945 tocindex
= (address
- sec_hdr
->addr
)/size
;
946 symindex
= tocdylib
[sec_hdr
->reserved1
+ tocindex
];
948 name
= get_sym_name(&symtab
[symindex
]);
953 static const char * find_reloc_name_given_its_address(int address
)
956 for(i
= 0; i
< segment
->nsects
; i
++)
958 const char * name
= find_reloc_name_in_sec_ptr(address
, §ion_hdr
[i
]);
965 static const char * get_reloc_name(EXE_RELOC
* rel
, int * sslide
)
968 struct scattered_relocation_info
* sca_rel
= (struct scattered_relocation_info
*)rel
;
969 int sectnum
= rel
->r_symbolnum
;
973 /* init the slide value */
976 if(R_SCATTERED
& rel
->r_address
)
977 return (char *)find_reloc_name_given_its_address(sca_rel
->r_value
);
981 /* ignore debug sym */
982 if ( symtab
[rel
->r_symbolnum
].n_type
& N_STAB
)
984 return get_sym_name(&symtab
[rel
->r_symbolnum
]);
987 /* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
988 sectoffset
= *(uint32_t *)(text
+ rel
->r_address
) & 0xffff;
990 if(sectnum
==0xffffff)
994 if(sectnum
> segment
->nsects
)
995 error("sectnum > segment->nsects");
999 case PPC_RELOC_LO16
: fetch_next_pair_value(rel
+1, &other_half
); sectoffset
|= (other_half
<< 16);
1001 case PPC_RELOC_HI16
: fetch_next_pair_value(rel
+1, &other_half
); sectoffset
= (sectoffset
<< 16) | (uint16_t)(other_half
& 0xffff);
1003 case PPC_RELOC_HA16
: fetch_next_pair_value(rel
+1, &other_half
); sectoffset
= (sectoffset
<< 16) + (int16_t)(other_half
& 0xffff);
1005 case PPC_RELOC_BR24
:
1006 sectoffset
= ( *(uint32_t *)(text
+ rel
->r_address
) & 0x03fffffc );
1007 if (sectoffset
& 0x02000000) sectoffset
|= 0xfc000000;
1010 error("switch(rel->type) not found");
1014 sectoffset
+= rel
->r_address
;
1016 if (rel
->r_type
== PPC_RELOC_BR24
)
1017 name
= (char *)find_reloc_name_in_sec_ptr((int)sectoffset
, §ion_hdr
[sectnum
-1]);
1019 /* search it in the full symbol list, if not found */
1021 name
= (char *)find_sym_with_value_and_sec_number(sectoffset
, sectnum
, sslide
);
1026 /* Used by dyngen common code */
1027 static const char * get_rel_sym_name(EXE_RELOC
* rel
)
1030 return get_reloc_name( rel
, &sslide
);
1033 /* Used by dyngen common code */
1034 static host_ulong
get_rel_offset(EXE_RELOC
*rel
)
1036 struct scattered_relocation_info
* sca_rel
= (struct scattered_relocation_info
*)rel
;
1037 if(R_SCATTERED
& rel
->r_address
)
1038 return sca_rel
->r_address
;
1040 return rel
->r_address
;
1043 /* load a mach-o object file */
1044 int load_object(const char *filename
)
1047 unsigned int offset_to_segment
= 0;
1048 unsigned int offset_to_dysymtab
= 0;
1049 unsigned int offset_to_symtab
= 0;
1050 struct load_command lc
;
1053 struct nlist
*syment
;
1055 fd
= open(filename
, O_RDONLY
);
1057 error("can't open file '%s'", filename
);
1059 /* Read Mach header. */
1060 if (read(fd
, &mach_hdr
, sizeof (mach_hdr
)) != sizeof (mach_hdr
))
1061 error("unable to read file header");
1063 /* Check Mach identification. */
1064 if (!check_mach_header(mach_hdr
)) {
1065 error("bad Mach header");
1068 if (mach_hdr
.cputype
!= CPU_TYPE_POWERPC
)
1069 error("Unsupported CPU");
1071 if (mach_hdr
.filetype
!= MH_OBJECT
)
1072 error("Unsupported Mach Object");
1074 /* read segment headers */
1075 for(i
=0, j
=sizeof(mach_hdr
); i
<mach_hdr
.ncmds
; i
++)
1077 if(read(fd
, &lc
, sizeof(struct load_command
)) != sizeof(struct load_command
))
1078 error("unable to read load_command");
1079 if(lc
.cmd
== LC_SEGMENT
)
1081 offset_to_segment
= j
;
1082 lseek(fd
, offset_to_segment
, SEEK_SET
);
1083 segment
= malloc(sizeof(struct segment_command
));
1084 if(read(fd
, segment
, sizeof(struct segment_command
)) != sizeof(struct segment_command
))
1085 error("unable to read LC_SEGMENT");
1087 if(lc
.cmd
== LC_DYSYMTAB
)
1089 offset_to_dysymtab
= j
;
1090 lseek(fd
, offset_to_dysymtab
, SEEK_SET
);
1091 dysymtabcmd
= malloc(sizeof(struct dysymtab_command
));
1092 if(read(fd
, dysymtabcmd
, sizeof(struct dysymtab_command
)) != sizeof(struct dysymtab_command
))
1093 error("unable to read LC_DYSYMTAB");
1095 if(lc
.cmd
== LC_SYMTAB
)
1097 offset_to_symtab
= j
;
1098 lseek(fd
, offset_to_symtab
, SEEK_SET
);
1099 symtabcmd
= malloc(sizeof(struct symtab_command
));
1100 if(read(fd
, symtabcmd
, sizeof(struct symtab_command
)) != sizeof(struct symtab_command
))
1101 error("unable to read LC_SYMTAB");
1105 lseek(fd
, j
, SEEK_SET
);
1109 error("unable to find LC_SEGMENT");
1111 /* read section headers */
1112 section_hdr
= load_data(fd
, offset_to_segment
+ sizeof(struct segment_command
), segment
->nsects
* sizeof(struct section
));
1114 /* read all section data */
1115 sdata
= (uint8_t **)malloc(sizeof(void *) * segment
->nsects
);
1116 memset(sdata
, 0, sizeof(void *) * segment
->nsects
);
1118 /* Load the data in section data */
1119 for(i
= 0; i
< segment
->nsects
; i
++) {
1120 sdata
[i
] = load_data(fd
, section_hdr
[i
].offset
, section_hdr
[i
].size
);
1124 text_sec_hdr
= find_mach_sec_hdr(section_hdr
, segment
->nsects
, SEG_TEXT
, SECT_TEXT
);
1125 i
= find_mach_sec_index(section_hdr
, segment
->nsects
, SEG_TEXT
, SECT_TEXT
);
1126 if (i
== -1 || !text_sec_hdr
)
1127 error("could not find __TEXT,__text section");
1130 /* Make sure dysym was loaded */
1131 if(!(int)dysymtabcmd
)
1132 error("could not find __DYSYMTAB segment");
1134 /* read the table of content of the indirect sym */
1135 tocdylib
= load_data( fd
, dysymtabcmd
->indirectsymoff
, dysymtabcmd
->nindirectsyms
* sizeof(uint32_t) );
1137 /* Make sure symtab was loaded */
1139 error("could not find __SYMTAB segment");
1140 nb_syms
= symtabcmd
->nsyms
;
1142 symtab_std
= load_data(fd
, symtabcmd
->symoff
, symtabcmd
->nsyms
* sizeof(struct nlist
));
1143 strtab
= load_data(fd
, symtabcmd
->stroff
, symtabcmd
->strsize
);
1145 symtab
= malloc(sizeof(EXE_SYM
) * nb_syms
);
1147 /* Now transform the symtab, to an extended version, with the sym size, and the C name */
1148 for(i
= 0, sym
= symtab
, syment
= symtab_std
; i
< nb_syms
; i
++, sym
++, syment
++) {
1149 struct nlist
*sym_follow
, *sym_next
= 0;
1151 memset(sym
, 0, sizeof(*sym
));
1153 if ( syment
->n_type
& N_STAB
) /* Debug symbols are skipped */
1156 memcpy(sym
, syment
, sizeof(*syment
));
1158 /* Find the following symbol in order to get the current symbol size */
1159 for(j
= 0, sym_follow
= symtab_std
; j
< nb_syms
; j
++, sym_follow
++) {
1160 if ( sym_follow
->n_sect
!= 1 || sym_follow
->n_type
& N_STAB
|| !(sym_follow
->n_value
> sym
->st_value
))
1163 sym_next
= sym_follow
;
1166 if(!(sym_next
->n_value
> sym_follow
->n_value
))
1168 sym_next
= sym_follow
;
1171 sym
->st_size
= sym_next
->n_value
- sym
->st_value
;
1173 sym
->st_size
= text_sec_hdr
->size
- sym
->st_value
;
1177 relocs
= load_data(fd
, text_sec_hdr
->reloff
, text_sec_hdr
->nreloc
* sizeof(struct relocation_info
));
1178 nb_relocs
= text_sec_hdr
->nreloc
;
1184 #endif /* CONFIG_FORMAT_MACH */
1186 void get_reloc_expr(char *name
, int name_size
, const char *sym_name
)
1190 if (strstart(sym_name
, "__op_param", &p
)) {
1191 snprintf(name
, name_size
, "param%s", p
);
1192 } else if (strstart(sym_name
, "__op_gen_label", &p
)) {
1193 snprintf(name
, name_size
, "gen_labels[param%s]", p
);
1196 if (sym_name
[0] == '.')
1197 snprintf(name
, sizeof(name
),
1198 "(long)(&__dot_%s)",
1202 snprintf(name
, name_size
, "(long)(&%s)", sym_name
);
1208 #define PLT_ENTRY_SIZE 16 /* 1 bundle containing "brl" */
1211 struct plt_entry
*next
;
1213 unsigned long addend
;
1217 get_plt_index (const char *name
, unsigned long addend
)
1219 struct plt_entry
*plt
, *prev
= NULL
;
1222 /* see if we already have an entry for this target: */
1223 for (plt
= plt_list
; plt
; ++index
, prev
= plt
, plt
= plt
->next
)
1224 if (strcmp(plt
->name
, name
) == 0 && plt
->addend
== addend
)
1227 /* nope; create a new PLT entry: */
1229 plt
= malloc(sizeof(*plt
));
1234 memset(plt
, 0, sizeof(*plt
));
1235 plt
->name
= strdup(name
);
1236 plt
->addend
= addend
;
1238 /* append to plt-list: */
1250 int arm_emit_ldr_info(const char *name
, unsigned long start_offset
,
1251 FILE *outfile
, uint8_t *p_start
, uint8_t *p_end
,
1252 ELF_RELOC
*relocs
, int nb_relocs
)
1256 int offset
, min_offset
, pc_offset
, data_size
;
1257 uint8_t data_allocated
[1024];
1258 unsigned int data_index
;
1260 memset(data_allocated
, 0, sizeof(data_allocated
));
1263 min_offset
= p_end
- p_start
;
1264 while (p
< p_start
+ min_offset
) {
1265 insn
= get32((uint32_t *)p
);
1266 if ((insn
& 0x0d5f0000) == 0x051f0000) {
1267 /* ldr reg, [pc, #im] */
1268 offset
= insn
& 0xfff;
1269 if (!(insn
& 0x00800000))
1271 if ((offset
& 3) !=0)
1272 error("%s:%04x: ldr pc offset must be 32 bit aligned",
1273 name
, start_offset
+ p
- p_start
);
1274 pc_offset
= p
- p_start
+ offset
+ 8;
1275 if (pc_offset
<= (p
- p_start
) ||
1276 pc_offset
>= (p_end
- p_start
))
1277 error("%s:%04x: ldr pc offset must point inside the function code",
1278 name
, start_offset
+ p
- p_start
);
1279 if (pc_offset
< min_offset
)
1280 min_offset
= pc_offset
;
1283 fprintf(outfile
, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
1285 /* ldr data index */
1286 data_index
= ((p_end
- p_start
) - pc_offset
- 4) >> 2;
1287 fprintf(outfile
, " arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n",
1289 fprintf(outfile
, " arm_ldr_ptr++;\n");
1290 if (data_index
>= sizeof(data_allocated
))
1291 error("%s: too many data", name
);
1292 if (!data_allocated
[data_index
]) {
1294 int i
, addend
, type
;
1295 const char *sym_name
, *p
;
1298 data_allocated
[data_index
] = 1;
1301 addend
= get32((uint32_t *)(p_start
+ pc_offset
));
1303 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
1304 if (rel
->r_offset
== (pc_offset
+ start_offset
)) {
1305 sym_name
= get_rel_sym_name(rel
);
1306 /* the compiler leave some unnecessary references to the code */
1307 get_reloc_expr(relname
, sizeof(relname
), sym_name
);
1308 type
= ELF32_R_TYPE(rel
->r_info
);
1309 if (type
!= R_ARM_ABS32
)
1310 error("%s: unsupported data relocation", name
);
1314 fprintf(outfile
, " arm_data_ptr[%d] = 0x%x",
1315 data_index
, addend
);
1316 if (relname
[0] != '\0')
1317 fprintf(outfile
, " + %s", relname
);
1318 fprintf(outfile
, ";\n");
1324 data_size
= (p_end
- p_start
) - min_offset
;
1325 if (data_size
> 0 && outfile
) {
1326 fprintf(outfile
, " arm_data_ptr += %d;\n", data_size
>> 2);
1329 /* the last instruction must be a mov pc, lr */
1333 insn
= get32((uint32_t *)p
);
1334 if ((insn
& 0xffff0000) != 0xe91b0000) {
1337 printf("%s: invalid epilog\n", name
);
1346 /* generate op code */
1347 void gen_code(const char *name
, host_ulong offset
, host_ulong size
,
1348 FILE *outfile
, int gen_switch
)
1351 uint8_t *p_start
, *p_end
;
1352 host_ulong start_offset
;
1354 uint8_t args_present
[MAX_ARGS
];
1355 const char *sym_name
, *p
;
1358 /* Compute exact size excluding prologue and epilogue instructions.
1359 * Increment start_offset to skip epilogue instructions, then compute
1360 * copy_size the indicate the size of the remaining instructions (in
1363 p_start
= text
+ offset
;
1364 p_end
= p_start
+ size
;
1365 start_offset
= offset
;
1366 #if defined(HOST_I386) || defined(HOST_X86_64)
1367 #ifdef CONFIG_FORMAT_COFF
1372 error("empty code for %s", name
);
1373 while (*p
!= 0xc3) {
1376 error("ret or jmp expected at the end of %s", name
);
1378 copy_size
= p
- p_start
;
1383 len
= p_end
- p_start
;
1385 error("empty code for %s", name
);
1386 if (p_end
[-1] == 0xc3) {
1389 error("ret or jmp expected at the end of %s", name
);
1394 #elif defined(HOST_PPC)
1397 p
= (void *)(p_end
- 4);
1399 error("empty code for %s", name
);
1400 if (get32((uint32_t *)p
) != 0x4e800020)
1401 error("blr expected at the end of %s", name
);
1402 copy_size
= p
- p_start
;
1404 #elif defined(HOST_S390)
1407 p
= (void *)(p_end
- 2);
1409 error("empty code for %s", name
);
1410 if (get16((uint16_t *)p
) != 0x07fe && get16((uint16_t *)p
) != 0x07f4)
1411 error("br %%r14 expected at the end of %s", name
);
1412 copy_size
= p
- p_start
;
1414 #elif defined(HOST_ALPHA)
1419 /* XXX: check why it occurs */
1421 error("empty code for %s", name
);
1423 if (get32((uint32_t *)p
) != 0x6bfa8001)
1424 error("ret expected at the end of %s", name
);
1425 copy_size
= p
- p_start
;
1427 #elif defined(HOST_IA64)
1430 p
= (void *)(p_end
- 4);
1432 error("empty code for %s", name
);
1433 /* br.ret.sptk.many b0;; */
1435 if (get32((uint32_t *)p
) != 0x00840008)
1436 error("br.ret.sptk.many b0;; expected at the end of %s", name
);
1437 copy_size
= p_end
- p_start
;
1439 #elif defined(HOST_SPARC)
1441 uint32_t start_insn
, end_insn1
, end_insn2
;
1443 p
= (void *)(p_end
- 8);
1445 error("empty code for %s", name
);
1446 start_insn
= get32((uint32_t *)(p_start
+ 0x0));
1447 end_insn1
= get32((uint32_t *)(p
+ 0x0));
1448 end_insn2
= get32((uint32_t *)(p
+ 0x4));
1449 if ((start_insn
& ~0x1fff) == 0x9de3a000) {
1451 start_offset
+= 0x4;
1452 if ((int)(start_insn
| ~0x1fff) < -128)
1453 error("Found bogus save at the start of %s", name
);
1454 if (end_insn1
!= 0x81c7e008 || end_insn2
!= 0x81e80000)
1455 error("ret; restore; not found at end of %s", name
);
1457 error("No save at the beginning of %s", name
);
1460 /* Skip a preceeding nop, if present. */
1462 skip_insn
= get32((uint32_t *)(p
- 0x4));
1463 if (skip_insn
== 0x01000000)
1467 copy_size
= p
- p_start
;
1469 #elif defined(HOST_SPARC64)
1471 uint32_t start_insn
, end_insn1
, end_insn2
, skip_insn
;
1473 p
= (void *)(p_end
- 8);
1475 error("empty code for %s", name
);
1476 start_insn
= get32((uint32_t *)(p_start
+ 0x0));
1477 end_insn1
= get32((uint32_t *)(p
+ 0x0));
1478 end_insn2
= get32((uint32_t *)(p
+ 0x4));
1479 if ((start_insn
& ~0x1fff) == 0x9de3a000) {
1481 start_offset
+= 0x4;
1482 if ((int)(start_insn
| ~0x1fff) < -256)
1483 error("Found bogus save at the start of %s", name
);
1484 if (end_insn1
!= 0x81c7e008 || end_insn2
!= 0x81e80000)
1485 error("ret; restore; not found at end of %s", name
);
1487 error("No save at the beginning of %s", name
);
1490 /* Skip a preceeding nop, if present. */
1492 skip_insn
= get32((uint32_t *)(p
- 0x4));
1493 if (skip_insn
== 0x01000000)
1497 copy_size
= p
- p_start
;
1499 #elif defined(HOST_ARM)
1501 if ((p_end
- p_start
) <= 16)
1502 error("%s: function too small", name
);
1503 if (get32((uint32_t *)p_start
) != 0xe1a0c00d ||
1504 (get32((uint32_t *)(p_start
+ 4)) & 0xffff0000) != 0xe92d0000 ||
1505 get32((uint32_t *)(p_start
+ 8)) != 0xe24cb004)
1506 error("%s: invalid prolog", name
);
1509 copy_size
= arm_emit_ldr_info(name
, start_offset
, NULL
, p_start
, p_end
,
1512 #elif defined(HOST_M68K)
1515 p
= (void *)(p_end
- 2);
1517 error("empty code for %s", name
);
1518 // remove NOP's, probably added for alignment
1519 while ((get16((uint16_t *)p
) == 0x4e71) &&
1522 if (get16((uint16_t *)p
) != 0x4e75)
1523 error("rts expected at the end of %s", name
);
1524 copy_size
= p
- p_start
;
1527 #error unsupported CPU
1530 /* compute the number of arguments by looking at the relocations */
1531 for(i
= 0;i
< MAX_ARGS
; i
++)
1532 args_present
[i
] = 0;
1534 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
1535 host_ulong offset
= get_rel_offset(rel
);
1536 if (offset
>= start_offset
&&
1537 offset
< start_offset
+ (p_end
- p_start
)) {
1538 sym_name
= get_rel_sym_name(rel
);
1541 if (strstart(sym_name
, "__op_param", &p
) ||
1542 strstart(sym_name
, "__op_gen_label", &p
)) {
1543 n
= strtoul(p
, NULL
, 10);
1545 error("too many arguments in %s", name
);
1546 args_present
[n
- 1] = 1;
1552 while (nb_args
< MAX_ARGS
&& args_present
[nb_args
])
1554 for(i
= nb_args
; i
< MAX_ARGS
; i
++) {
1555 if (args_present
[i
])
1556 error("inconsistent argument numbering in %s", name
);
1559 if (gen_switch
== 2) {
1560 fprintf(outfile
, "DEF(%s, %d, %d)\n", name
+ 3, nb_args
, copy_size
);
1561 } else if (gen_switch
== 1) {
1564 fprintf(outfile
, "case INDEX_%s: {\n", name
);
1566 fprintf(outfile
, " long ");
1567 for(i
= 0; i
< nb_args
; i
++) {
1569 fprintf(outfile
, ", ");
1570 fprintf(outfile
, "param%d", i
+ 1);
1572 fprintf(outfile
, ";\n");
1574 #if defined(HOST_IA64)
1575 fprintf(outfile
, " extern char %s;\n", name
);
1577 fprintf(outfile
, " extern void %s();\n", name
);
1580 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
1581 host_ulong offset
= get_rel_offset(rel
);
1582 if (offset
>= start_offset
&&
1583 offset
< start_offset
+ (p_end
- p_start
)) {
1584 sym_name
= get_rel_sym_name(rel
);
1588 !strstart(sym_name
, "__op_param", NULL
) &&
1589 !strstart(sym_name
, "__op_jmp", NULL
) &&
1590 !strstart(sym_name
, "__op_gen_label", NULL
)) {
1591 #if defined(HOST_SPARC)
1592 if (sym_name
[0] == '.') {
1594 "extern char __dot_%s __asm__(\"%s\");\n",
1595 sym_name
+1, sym_name
);
1599 #if defined(__APPLE__)
1600 /* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */
1601 fprintf(outfile
, "extern char %s __attribute__((unused));\n", sym_name
);
1602 #elif defined(HOST_IA64)
1603 if (ELF64_R_TYPE(rel
->r_info
) != R_IA64_PCREL21B
)
1605 * PCREL21 br.call targets generally
1606 * are out of range and need to go
1607 * through an "import stub".
1609 fprintf(outfile
, " extern char %s;\n",
1612 fprintf(outfile
, "extern char %s;\n", sym_name
);
1618 fprintf(outfile
, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
1619 name
, (int)(start_offset
- offset
), copy_size
);
1621 /* emit code offset information */
1624 const char *sym_name
, *p
;
1628 for(i
= 0, sym
= symtab
; i
< nb_syms
; i
++, sym
++) {
1629 sym_name
= get_sym_name(sym
);
1630 if (strstart(sym_name
, "__op_label", &p
)) {
1632 unsigned long offset
;
1634 /* test if the variable refers to a label inside
1635 the code we are generating */
1636 #ifdef CONFIG_FORMAT_COFF
1637 if (sym
->st_shndx
== text_shndx
) {
1638 ptr
= sdata
[coff_text_shndx
];
1639 } else if (sym
->st_shndx
== data_shndx
) {
1640 ptr
= sdata
[coff_data_shndx
];
1644 #elif defined(CONFIG_FORMAT_MACH)
1647 ptr
= sdata
[sym
->n_sect
-1];
1649 ptr
= sdata
[sym
->st_shndx
];
1652 error("__op_labelN in invalid section");
1653 offset
= sym
->st_value
;
1654 #ifdef CONFIG_FORMAT_MACH
1655 offset
-= section_hdr
[sym
->n_sect
-1].addr
;
1657 val
= *(unsigned long *)(ptr
+ offset
);
1658 #ifdef ELF_USES_RELOCA
1660 int reloc_shndx
, nb_relocs1
, j
;
1662 /* try to find a matching relocation */
1663 reloc_shndx
= find_reloc(sym
->st_shndx
);
1665 nb_relocs1
= shdr
[reloc_shndx
].sh_size
/
1666 shdr
[reloc_shndx
].sh_entsize
;
1667 rel
= (ELF_RELOC
*)sdata
[reloc_shndx
];
1668 for(j
= 0; j
< nb_relocs1
; j
++) {
1669 if (rel
->r_offset
== offset
) {
1670 val
= rel
->r_addend
;
1678 if (val
>= start_offset
&& val
<= start_offset
+ copy_size
) {
1679 n
= strtol(p
, NULL
, 10);
1680 fprintf(outfile
, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n
, val
- start_offset
);
1686 /* load parameres in variables */
1687 for(i
= 0; i
< nb_args
; i
++) {
1688 fprintf(outfile
, " param%d = *opparam_ptr++;\n", i
+ 1);
1691 /* patch relocations */
1692 #if defined(HOST_I386)
1697 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
1698 if (rel
->r_offset
>= start_offset
&&
1699 rel
->r_offset
< start_offset
+ copy_size
) {
1700 sym_name
= get_rel_sym_name(rel
);
1701 if (strstart(sym_name
, "__op_jmp", &p
)) {
1703 n
= strtol(p
, NULL
, 10);
1704 /* __op_jmp relocations are done at
1705 runtime to do translated block
1706 chaining: the offset of the instruction
1707 needs to be stored */
1708 fprintf(outfile
, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1709 n
, rel
->r_offset
- start_offset
);
1713 get_reloc_expr(name
, sizeof(name
), sym_name
);
1714 addend
= get32((uint32_t *)(text
+ rel
->r_offset
));
1715 #ifdef CONFIG_FORMAT_ELF
1716 type
= ELF32_R_TYPE(rel
->r_info
);
1719 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1720 rel
->r_offset
- start_offset
, name
, addend
);
1723 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1724 rel
->r_offset
- start_offset
, name
, rel
->r_offset
- start_offset
, addend
);
1727 error("unsupported i386 relocation (%d)", type
);
1729 #elif defined(CONFIG_FORMAT_COFF)
1734 temp_name
= get_sym_name(symtab
+ *(uint32_t *)(rel
->r_reloc
->r_symndx
));
1735 if (!strcmp(temp_name
, ".data")) {
1736 for (j
= 0, sym
= symtab
; j
< nb_syms
; j
++, sym
++) {
1737 if (strstart(sym
->st_name
, sym_name
, NULL
)) {
1738 addend
-= sym
->st_value
;
1746 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1747 rel
->r_offset
- start_offset
, name
, addend
);
1750 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
1751 rel
->r_offset
- start_offset
, name
, rel
->r_offset
- start_offset
, addend
);
1754 error("unsupported i386 relocation (%d)", type
);
1757 #error unsupport object format
1762 #elif defined(HOST_X86_64)
1767 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
1768 if (rel
->r_offset
>= start_offset
&&
1769 rel
->r_offset
< start_offset
+ copy_size
) {
1770 sym_name
= strtab
+ symtab
[ELFW(R_SYM
)(rel
->r_info
)].st_name
;
1771 get_reloc_expr(name
, sizeof(name
), sym_name
);
1772 type
= ELF32_R_TYPE(rel
->r_info
);
1773 addend
= rel
->r_addend
;
1776 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
1777 rel
->r_offset
- start_offset
, name
, addend
);
1780 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
1781 rel
->r_offset
- start_offset
, name
, addend
);
1784 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1785 rel
->r_offset
- start_offset
, name
, rel
->r_offset
- start_offset
, addend
);
1788 error("unsupported X86_64 relocation (%d)", type
);
1793 #elif defined(HOST_PPC)
1795 #ifdef CONFIG_FORMAT_ELF
1799 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
1800 if (rel
->r_offset
>= start_offset
&&
1801 rel
->r_offset
< start_offset
+ copy_size
) {
1802 sym_name
= strtab
+ symtab
[ELFW(R_SYM
)(rel
->r_info
)].st_name
;
1803 if (strstart(sym_name
, "__op_jmp", &p
)) {
1805 n
= strtol(p
, NULL
, 10);
1806 /* __op_jmp relocations are done at
1807 runtime to do translated block
1808 chaining: the offset of the instruction
1809 needs to be stored */
1810 fprintf(outfile
, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1811 n
, rel
->r_offset
- start_offset
);
1815 get_reloc_expr(name
, sizeof(name
), sym_name
);
1816 type
= ELF32_R_TYPE(rel
->r_info
);
1817 addend
= rel
->r_addend
;
1820 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1821 rel
->r_offset
- start_offset
, name
, addend
);
1823 case R_PPC_ADDR16_LO
:
1824 fprintf(outfile
, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
1825 rel
->r_offset
- start_offset
, name
, addend
);
1827 case R_PPC_ADDR16_HI
:
1828 fprintf(outfile
, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
1829 rel
->r_offset
- start_offset
, name
, addend
);
1831 case R_PPC_ADDR16_HA
:
1832 fprintf(outfile
, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
1833 rel
->r_offset
- start_offset
, name
, addend
);
1836 /* warning: must be at 32 MB distancy */
1837 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
1838 rel
->r_offset
- start_offset
, rel
->r_offset
- start_offset
, name
, rel
->r_offset
- start_offset
, addend
);
1841 error("unsupported powerpc relocation (%d)", type
);
1845 #elif defined(CONFIG_FORMAT_MACH)
1846 struct scattered_relocation_info
*scarel
;
1847 struct relocation_info
* rel
;
1848 char final_sym_name
[256];
1849 const char *sym_name
;
1854 for(i
= 0, rel
= relocs
; i
< nb_relocs
; i
++, rel
++) {
1855 unsigned int offset
, length
, value
= 0;
1856 unsigned int type
, pcrel
, isym
= 0;
1857 unsigned int usesym
= 0;
1859 if(R_SCATTERED
& rel
->r_address
) {
1860 scarel
= (struct scattered_relocation_info
*)rel
;
1861 offset
= (unsigned int)scarel
->r_address
;
1862 length
= scarel
->r_length
;
1863 pcrel
= scarel
->r_pcrel
;
1864 type
= scarel
->r_type
;
1865 value
= scarel
->r_value
;
1867 value
= isym
= rel
->r_symbolnum
;
1868 usesym
= (rel
->r_extern
);
1869 offset
= rel
->r_address
;
1870 length
= rel
->r_length
;
1871 pcrel
= rel
->r_pcrel
;
1875 slide
= offset
- start_offset
;
1877 if (!(offset
>= start_offset
&& offset
< start_offset
+ size
))
1878 continue; /* not in our range */
1880 sym_name
= get_reloc_name(rel
, &sslide
);
1882 if(usesym
&& symtab
[isym
].n_type
& N_STAB
)
1883 continue; /* don't handle STAB (debug sym) */
1885 if (sym_name
&& strstart(sym_name
, "__op_jmp", &p
)) {
1887 n
= strtol(p
, NULL
, 10);
1888 fprintf(outfile
, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1890 continue; /* Nothing more to do */
1895 fprintf(outfile
, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
1896 name
, value
, usesym
? "use sym" : "don't use sym", offset
, length
, pcrel
? "pcrel":"", type
);
1897 continue; /* dunno how to handle without final_sym_name */
1900 get_reloc_expr(final_sym_name
, sizeof(final_sym_name
),
1903 case PPC_RELOC_BR24
:
1904 if (!strstart(sym_name
,"__op_gen_label",&p
)) {
1905 fprintf(outfile
, "{\n");
1906 fprintf(outfile
, " uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide
);
1907 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((imm + ((long)%s - (long)gen_code_ptr) + %d) & 0x03fffffc);\n",
1908 slide
, slide
, name
, sslide
);
1909 fprintf(outfile
, "}\n");
1911 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
1912 slide
, slide
, final_sym_name
, slide
);
1915 case PPC_RELOC_HI16
:
1916 fprintf(outfile
, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
1917 slide
, final_sym_name
, sslide
);
1919 case PPC_RELOC_LO16
:
1920 fprintf(outfile
, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
1921 slide
, final_sym_name
, sslide
);
1923 case PPC_RELOC_HA16
:
1924 fprintf(outfile
, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
1925 slide
, final_sym_name
, sslide
);
1928 error("unsupported powerpc relocation (%d)", type
);
1932 #error unsupport object format
1935 #elif defined(HOST_S390)
1940 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
1941 if (rel
->r_offset
>= start_offset
&&
1942 rel
->r_offset
< start_offset
+ copy_size
) {
1943 sym_name
= strtab
+ symtab
[ELFW(R_SYM
)(rel
->r_info
)].st_name
;
1944 get_reloc_expr(name
, sizeof(name
), sym_name
);
1945 type
= ELF32_R_TYPE(rel
->r_info
);
1946 addend
= rel
->r_addend
;
1949 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1950 rel
->r_offset
- start_offset
, name
, addend
);
1953 fprintf(outfile
, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
1954 rel
->r_offset
- start_offset
, name
, addend
);
1957 fprintf(outfile
, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
1958 rel
->r_offset
- start_offset
, name
, addend
);
1961 error("unsupported s390 relocation (%d)", type
);
1966 #elif defined(HOST_ALPHA)
1968 for (i
= 0, rel
= relocs
; i
< nb_relocs
; i
++, rel
++) {
1969 if (rel
->r_offset
>= start_offset
&& rel
->r_offset
< start_offset
+ copy_size
) {
1972 type
= ELF64_R_TYPE(rel
->r_info
);
1973 sym_name
= strtab
+ symtab
[ELF64_R_SYM(rel
->r_info
)].st_name
;
1975 case R_ALPHA_GPDISP
:
1976 /* The gp is just 32 bit, and never changes, so it's easiest to emit it
1977 as an immediate instead of constructing it from the pv or ra. */
1978 fprintf(outfile
, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
1979 rel
->r_offset
- start_offset
);
1980 fprintf(outfile
, " immediate_lda(gen_code_ptr + %ld, gp);\n",
1981 rel
->r_offset
- start_offset
+ rel
->r_addend
);
1983 case R_ALPHA_LITUSE
:
1984 /* jsr to literal hint. Could be used to optimize to bsr. Ignore for
1985 now, since some called functions (libc) need pv to be set up. */
1988 /* Branch target prediction hint. Ignore for now. Should be already
1989 correct for in-function jumps. */
1991 case R_ALPHA_LITERAL
:
1992 /* Load a literal from the GOT relative to the gp. Since there's only a
1993 single gp, nothing is to be done. */
1995 case R_ALPHA_GPRELHIGH
:
1996 /* Handle fake relocations against __op_param symbol. Need to emit the
1997 high part of the immediate value instead. Other symbols need no
1998 special treatment. */
1999 if (strstart(sym_name
, "__op_param", &p
))
2000 fprintf(outfile
, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
2001 rel
->r_offset
- start_offset
, p
);
2003 case R_ALPHA_GPRELLOW
:
2004 if (strstart(sym_name
, "__op_param", &p
))
2005 fprintf(outfile
, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
2006 rel
->r_offset
- start_offset
, p
);
2009 /* PC-relative jump. Tweak offset to skip the two instructions that try to
2010 set up the gp from the pv. */
2011 fprintf(outfile
, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
2012 rel
->r_offset
- start_offset
, sym_name
, rel
->r_offset
- start_offset
);
2015 error("unsupported Alpha relocation (%d)", type
);
2020 #elif defined(HOST_IA64)
2022 unsigned long sym_idx
;
2028 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
2029 sym_idx
= ELF64_R_SYM(rel
->r_info
);
2030 if (rel
->r_offset
< start_offset
2031 || rel
->r_offset
>= start_offset
+ copy_size
)
2033 sym_name
= (strtab
+ symtab
[sym_idx
].st_name
);
2034 if (strstart(sym_name
, "__op_jmp", &p
)) {
2036 n
= strtol(p
, NULL
, 10);
2037 /* __op_jmp relocations are done at
2038 runtime to do translated block
2039 chaining: the offset of the instruction
2040 needs to be stored */
2041 fprintf(outfile
, " jmp_offsets[%d] ="
2042 "%ld + (gen_code_ptr - gen_code_buf);\n",
2043 n
, rel
->r_offset
- start_offset
);
2046 get_reloc_expr(name
, sizeof(name
), sym_name
);
2047 type
= ELF64_R_TYPE(rel
->r_info
);
2048 addend
= rel
->r_addend
;
2049 code_offset
= rel
->r_offset
- start_offset
;
2053 " ia64_imm64(gen_code_ptr + %ld, "
2055 code_offset
, name
, addend
);
2057 case R_IA64_LTOFF22X
:
2058 case R_IA64_LTOFF22
:
2059 fprintf(outfile
, " IA64_LTOFF(gen_code_ptr + %ld,"
2060 " %s + %ld, %d);\n",
2061 code_offset
, name
, addend
,
2062 (type
== R_IA64_LTOFF22X
));
2066 " ia64_ldxmov(gen_code_ptr + %ld,"
2067 " %s + %ld);\n", code_offset
, name
, addend
);
2070 case R_IA64_PCREL21B
:
2071 if (strstart(sym_name
, "__op_gen_label", NULL
)) {
2073 " ia64_imm21b(gen_code_ptr + %ld,"
2074 " (long) (%s + %ld -\n\t\t"
2075 "((long) gen_code_ptr + %ld)) >> 4);\n",
2076 code_offset
, name
, addend
,
2077 code_offset
& ~0xfUL
);
2080 " IA64_PLT(gen_code_ptr + %ld, "
2081 "%d);\t/* %s + %ld */\n",
2083 get_plt_index(sym_name
, addend
),
2088 error("unsupported ia64 relocation (0x%x)",
2092 fprintf(outfile
, " ia64_nop_b(gen_code_ptr + %d);\n",
2093 copy_size
- 16 + 2);
2095 #elif defined(HOST_SPARC)
2100 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
2101 if (rel
->r_offset
>= start_offset
&&
2102 rel
->r_offset
< start_offset
+ copy_size
) {
2103 sym_name
= strtab
+ symtab
[ELF32_R_SYM(rel
->r_info
)].st_name
;
2104 get_reloc_expr(name
, sizeof(name
), sym_name
);
2105 type
= ELF32_R_TYPE(rel
->r_info
);
2106 addend
= rel
->r_addend
;
2109 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2110 rel
->r_offset
- start_offset
, name
, addend
);
2114 " *(uint32_t *)(gen_code_ptr + %d) = "
2115 "((*(uint32_t *)(gen_code_ptr + %d)) "
2117 " | (((%s + %d) >> 10) & 0x3fffff);\n",
2118 rel
->r_offset
- start_offset
,
2119 rel
->r_offset
- start_offset
,
2124 " *(uint32_t *)(gen_code_ptr + %d) = "
2125 "((*(uint32_t *)(gen_code_ptr + %d)) "
2127 " | ((%s + %d) & 0x3ff);\n",
2128 rel
->r_offset
- start_offset
,
2129 rel
->r_offset
- start_offset
,
2132 case R_SPARC_WDISP30
:
2134 " *(uint32_t *)(gen_code_ptr + %d) = "
2135 "((*(uint32_t *)(gen_code_ptr + %d)) "
2137 " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2138 " & 0x3fffffff);\n",
2139 rel
->r_offset
- start_offset
,
2140 rel
->r_offset
- start_offset
,
2142 rel
->r_offset
- start_offset
);
2145 error("unsupported sparc relocation (%d)", type
);
2150 #elif defined(HOST_SPARC64)
2155 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
2156 if (rel
->r_offset
>= start_offset
&&
2157 rel
->r_offset
< start_offset
+ copy_size
) {
2158 sym_name
= strtab
+ symtab
[ELF64_R_SYM(rel
->r_info
)].st_name
;
2159 get_reloc_expr(name
, sizeof(name
), sym_name
);
2160 type
= ELF64_R_TYPE(rel
->r_info
);
2161 addend
= rel
->r_addend
;
2164 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2165 rel
->r_offset
- start_offset
, name
, addend
);
2169 " *(uint32_t *)(gen_code_ptr + %d) = "
2170 "((*(uint32_t *)(gen_code_ptr + %d)) "
2172 " | (((%s + %d) >> 10) & 0x3fffff);\n",
2173 rel
->r_offset
- start_offset
,
2174 rel
->r_offset
- start_offset
,
2179 " *(uint32_t *)(gen_code_ptr + %d) = "
2180 "((*(uint32_t *)(gen_code_ptr + %d)) "
2182 " | ((%s + %d) & 0x3ff);\n",
2183 rel
->r_offset
- start_offset
,
2184 rel
->r_offset
- start_offset
,
2187 case R_SPARC_WDISP30
:
2189 " *(uint32_t *)(gen_code_ptr + %d) = "
2190 "((*(uint32_t *)(gen_code_ptr + %d)) "
2192 " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2193 " & 0x3fffffff);\n",
2194 rel
->r_offset
- start_offset
,
2195 rel
->r_offset
- start_offset
,
2197 rel
->r_offset
- start_offset
);
2200 error("unsupported sparc64 relocation (%d)", type
);
2205 #elif defined(HOST_ARM)
2211 arm_emit_ldr_info(name
, start_offset
, outfile
, p_start
, p_end
,
2214 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
2215 if (rel
->r_offset
>= start_offset
&&
2216 rel
->r_offset
< start_offset
+ copy_size
) {
2217 sym_name
= strtab
+ symtab
[ELFW(R_SYM
)(rel
->r_info
)].st_name
;
2218 /* the compiler leave some unnecessary references to the code */
2219 if (sym_name
[0] == '\0')
2221 get_reloc_expr(name
, sizeof(name
), sym_name
);
2222 type
= ELF32_R_TYPE(rel
->r_info
);
2223 addend
= get32((uint32_t *)(text
+ rel
->r_offset
));
2226 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2227 rel
->r_offset
- start_offset
, name
, addend
);
2230 fprintf(outfile
, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
2231 rel
->r_offset
- start_offset
, addend
, name
);
2234 error("unsupported arm relocation (%d)", type
);
2239 #elif defined(HOST_M68K)
2245 for(i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
2246 if (rel
->r_offset
>= start_offset
&&
2247 rel
->r_offset
< start_offset
+ copy_size
) {
2248 sym
= &(symtab
[ELFW(R_SYM
)(rel
->r_info
)]);
2249 sym_name
= strtab
+ symtab
[ELFW(R_SYM
)(rel
->r_info
)].st_name
;
2250 get_reloc_expr(name
, sizeof(name
), sym_name
);
2251 type
= ELF32_R_TYPE(rel
->r_info
);
2252 addend
= get32((uint32_t *)(text
+ rel
->r_offset
)) + rel
->r_addend
;
2255 fprintf(outfile
, " /* R_68K_32 RELOC, offset %x */\n", rel
->r_offset
) ;
2256 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
2257 rel
->r_offset
- start_offset
, name
, addend
);
2260 fprintf(outfile
, " /* R_68K_PC32 RELOC, offset %x */\n", rel
->r_offset
);
2261 fprintf(outfile
, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
2262 rel
->r_offset
- start_offset
, name
, rel
->r_offset
- start_offset
, /*sym->st_value+*/ addend
);
2265 error("unsupported m68k relocation (%d)", type
);
2271 #error unsupported CPU
2273 fprintf(outfile
, " gen_code_ptr += %d;\n", copy_size
);
2274 fprintf(outfile
, "}\n");
2275 fprintf(outfile
, "break;\n\n");
2277 fprintf(outfile
, "static inline void gen_%s(", name
);
2279 fprintf(outfile
, "void");
2281 for(i
= 0; i
< nb_args
; i
++) {
2283 fprintf(outfile
, ", ");
2284 fprintf(outfile
, "long param%d", i
+ 1);
2287 fprintf(outfile
, ")\n");
2288 fprintf(outfile
, "{\n");
2289 for(i
= 0; i
< nb_args
; i
++) {
2290 fprintf(outfile
, " *gen_opparam_ptr++ = param%d;\n", i
+ 1);
2292 fprintf(outfile
, " *gen_opc_ptr++ = INDEX_%s;\n", name
);
2293 fprintf(outfile
, "}\n\n");
2297 int gen_file(FILE *outfile
, int out_type
)
2302 if (out_type
== OUT_INDEX_OP
) {
2303 fprintf(outfile
, "DEF(end, 0, 0)\n");
2304 fprintf(outfile
, "DEF(nop, 0, 0)\n");
2305 fprintf(outfile
, "DEF(nop1, 1, 0)\n");
2306 fprintf(outfile
, "DEF(nop2, 2, 0)\n");
2307 fprintf(outfile
, "DEF(nop3, 3, 0)\n");
2308 for(i
= 0, sym
= symtab
; i
< nb_syms
; i
++, sym
++) {
2310 name
= get_sym_name(sym
);
2311 if (strstart(name
, OP_PREFIX
, NULL
)) {
2312 gen_code(name
, sym
->st_value
, sym
->st_size
, outfile
, 2);
2315 } else if (out_type
== OUT_GEN_OP
) {
2316 /* generate gen_xxx functions */
2317 fprintf(outfile
, "#include \"dyngen-op.h\"\n");
2318 for(i
= 0, sym
= symtab
; i
< nb_syms
; i
++, sym
++) {
2320 name
= get_sym_name(sym
);
2321 if (strstart(name
, OP_PREFIX
, NULL
)) {
2322 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2323 if (sym
->st_shndx
!= text_shndx
)
2324 error("invalid section for opcode (0x%x)", sym
->st_shndx
);
2326 gen_code(name
, sym
->st_value
, sym
->st_size
, outfile
, 0);
2331 /* generate big code generation switch */
2333 "int dyngen_code(uint8_t *gen_code_buf,\n"
2334 " uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
2335 " const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels)\n"
2337 " uint8_t *gen_code_ptr;\n"
2338 " const uint16_t *opc_ptr;\n"
2339 " const uint32_t *opparam_ptr;\n");
2343 " uint8_t *last_gen_code_ptr = gen_code_buf;\n"
2344 " LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
2345 " uint32_t *arm_data_ptr = arm_data_table;\n");
2349 long addend
, not_first
= 0;
2350 unsigned long sym_idx
;
2351 int index
, max_index
;
2352 const char *sym_name
;
2356 for (i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
2357 sym_idx
= ELF64_R_SYM(rel
->r_info
);
2358 sym_name
= (strtab
+ symtab
[sym_idx
].st_name
);
2359 if (strstart(sym_name
, "__op_gen_label", NULL
))
2361 if (ELF64_R_TYPE(rel
->r_info
) != R_IA64_PCREL21B
)
2364 addend
= rel
->r_addend
;
2365 index
= get_plt_index(sym_name
, addend
);
2366 if (index
<= max_index
)
2369 fprintf(outfile
, " extern void %s(void);\n", sym_name
);
2373 " struct ia64_fixup *plt_fixes = NULL, "
2374 "*ltoff_fixes = NULL;\n"
2375 " static long plt_target[] = {\n\t");
2378 for (i
= 0, rel
= relocs
;i
< nb_relocs
; i
++, rel
++) {
2379 sym_idx
= ELF64_R_SYM(rel
->r_info
);
2380 sym_name
= (strtab
+ symtab
[sym_idx
].st_name
);
2381 if (strstart(sym_name
, "__op_gen_label", NULL
))
2383 if (ELF64_R_TYPE(rel
->r_info
) != R_IA64_PCREL21B
)
2386 addend
= rel
->r_addend
;
2387 index
= get_plt_index(sym_name
, addend
);
2388 if (index
<= max_index
)
2393 fprintf(outfile
, ",\n\t");
2396 fprintf(outfile
, "(long) &%s + %ld", sym_name
, addend
);
2398 fprintf(outfile
, "(long) &%s", sym_name
);
2400 fprintf(outfile
, "\n };\n"
2401 " unsigned int plt_offset[%u] = { 0 };\n", max_index
+ 1);
2407 " gen_code_ptr = gen_code_buf;\n"
2408 " opc_ptr = opc_buf;\n"
2409 " opparam_ptr = opparam_buf;\n");
2411 /* Generate prologue, if needed. */
2415 " switch(*opc_ptr++) {\n"
2418 for(i
= 0, sym
= symtab
; i
< nb_syms
; i
++, sym
++) {
2420 name
= get_sym_name(sym
);
2421 if (strstart(name
, OP_PREFIX
, NULL
)) {
2423 printf("%4d: %s pos=0x%08x len=%d\n",
2424 i
, name
, sym
->st_value
, sym
->st_size
);
2426 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2427 if (sym
->st_shndx
!= text_shndx
)
2428 error("invalid section for opcode (0x%x)", sym
->st_shndx
);
2430 gen_code(name
, sym
->st_value
, sym
->st_size
, outfile
, 1);
2435 " case INDEX_op_nop:\n"
2437 " case INDEX_op_nop1:\n"
2440 " case INDEX_op_nop2:\n"
2441 " opparam_ptr += 2;\n"
2443 " case INDEX_op_nop3:\n"
2444 " opparam_ptr += 3;\n"
2451 /* generate constant table if needed */
2453 " if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
2454 " gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
2455 " last_gen_code_ptr = gen_code_ptr;\n"
2456 " arm_ldr_ptr = arm_ldr_table;\n"
2457 " arm_data_ptr = arm_data_table;\n"
2468 " ia64_apply_fixes(&gen_code_ptr, ltoff_fixes, "
2469 "(uint64_t) code_gen_buffer + 2*(1<<20), plt_fixes,\n\t\t\t"
2470 "sizeof(plt_target)/sizeof(plt_target[0]),\n\t\t\t"
2471 "plt_target, plt_offset);\n");
2474 /* generate some code patching */
2476 fprintf(outfile
, "gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 0);\n");
2478 /* flush instruction cache */
2479 fprintf(outfile
, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
2481 fprintf(outfile
, "return gen_code_ptr - gen_code_buf;\n");
2482 fprintf(outfile
, "}\n\n");
2491 printf("dyngen (c) 2003 Fabrice Bellard\n"
2492 "usage: dyngen [-o outfile] [-c] objfile\n"
2493 "Generate a dynamic code generator from an object file\n"
2494 "-c output enum of operations\n"
2495 "-g output gen_op_xx() functions\n"
2500 int main(int argc
, char **argv
)
2503 const char *filename
, *outfilename
;
2506 outfilename
= "out.c";
2507 out_type
= OUT_CODE
;
2509 c
= getopt(argc
, argv
, "ho:cg");
2517 outfilename
= optarg
;
2520 out_type
= OUT_INDEX_OP
;
2523 out_type
= OUT_GEN_OP
;
2529 filename
= argv
[optind
];
2530 outfile
= fopen(outfilename
, "w");
2532 error("could not open '%s'", outfilename
);
2534 load_object(filename
);
2535 gen_file(outfile
, out_type
);