| /* |
| * Generic Dynamic compiler generator |
| * |
| * Copyright (c) 2003 Fabrice Bellard |
| * |
| * The COFF object format support was extracted from Kazu's QEMU port |
| * to Win32. |
| * |
| * Mach-O Support by Matt Reda and Pierre d'Herbemont |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdarg.h> |
| #include <inttypes.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| |
| #include "config-host.h" |
| |
| /* NOTE: we test CONFIG_WIN32 instead of _WIN32 to enabled cross |
| compilation */ |
| #if defined(CONFIG_WIN32) |
| #define CONFIG_FORMAT_COFF |
| #elif defined(CONFIG_DARWIN) |
| #define CONFIG_FORMAT_MACH |
| #else |
| #define CONFIG_FORMAT_ELF |
| #endif |
| |
| #ifdef CONFIG_FORMAT_ELF |
| |
| /* elf format definitions. We use these macros to test the CPU to |
| allow cross compilation (this tool must be ran on the build |
| platform) */ |
| #if defined(HOST_I386) |
| |
| #define ELF_CLASS ELFCLASS32 |
| #define ELF_ARCH EM_386 |
| #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) ) |
| #undef ELF_USES_RELOCA |
| |
| #elif defined(HOST_X86_64) |
| |
| #define ELF_CLASS ELFCLASS64 |
| #define ELF_ARCH EM_X86_64 |
| #define elf_check_arch(x) ((x) == EM_X86_64) |
| #define ELF_USES_RELOCA |
| |
| #elif defined(HOST_PPC) |
| |
| #define ELF_CLASS ELFCLASS32 |
| #define ELF_ARCH EM_PPC |
| #define elf_check_arch(x) ((x) == EM_PPC) |
| #define ELF_USES_RELOCA |
| |
| #elif defined(HOST_S390) |
| |
| #define ELF_CLASS ELFCLASS32 |
| #define ELF_ARCH EM_S390 |
| #define elf_check_arch(x) ((x) == EM_S390) |
| #define ELF_USES_RELOCA |
| |
| #elif defined(HOST_ALPHA) |
| |
| #define ELF_CLASS ELFCLASS64 |
| #define ELF_ARCH EM_ALPHA |
| #define elf_check_arch(x) ((x) == EM_ALPHA) |
| #define ELF_USES_RELOCA |
| |
| #elif defined(HOST_IA64) |
| |
| #define ELF_CLASS ELFCLASS64 |
| #define ELF_ARCH EM_IA_64 |
| #define elf_check_arch(x) ((x) == EM_IA_64) |
| #define ELF_USES_RELOCA |
| |
| #elif defined(HOST_SPARC) |
| |
| #define ELF_CLASS ELFCLASS32 |
| #define ELF_ARCH EM_SPARC |
| #define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS) |
| #define ELF_USES_RELOCA |
| |
| #elif defined(HOST_SPARC64) |
| |
| #define ELF_CLASS ELFCLASS64 |
| #define ELF_ARCH EM_SPARCV9 |
| #define elf_check_arch(x) ((x) == EM_SPARCV9) |
| #define ELF_USES_RELOCA |
| |
| #elif defined(HOST_ARM) |
| |
| #define ELF_CLASS ELFCLASS32 |
| #define ELF_ARCH EM_ARM |
| #define elf_check_arch(x) ((x) == EM_ARM) |
| #define ELF_USES_RELOC |
| |
| #elif defined(HOST_M68K) |
| |
| #define ELF_CLASS ELFCLASS32 |
| #define ELF_ARCH EM_68K |
| #define elf_check_arch(x) ((x) == EM_68K) |
| #define ELF_USES_RELOCA |
| |
| #else |
| #error unsupported CPU - please update the code |
| #endif |
| |
| #include "elf.h" |
| |
| #if ELF_CLASS == ELFCLASS32 |
| typedef int32_t host_long; |
| typedef uint32_t host_ulong; |
| #define swabls(x) swab32s(x) |
| #else |
| typedef int64_t host_long; |
| typedef uint64_t host_ulong; |
| #define swabls(x) swab64s(x) |
| #endif |
| |
| #ifdef ELF_USES_RELOCA |
| #define SHT_RELOC SHT_RELA |
| #else |
| #define SHT_RELOC SHT_REL |
| #endif |
| |
| #define EXE_RELOC ELF_RELOC |
| #define EXE_SYM ElfW(Sym) |
| |
| #endif /* CONFIG_FORMAT_ELF */ |
| |
| #ifdef CONFIG_FORMAT_COFF |
| |
| #include "a.out.h" |
| |
| typedef int32_t host_long; |
| typedef uint32_t host_ulong; |
| |
| #define FILENAMELEN 256 |
| |
| typedef struct coff_sym { |
| struct external_syment *st_syment; |
| char st_name[FILENAMELEN]; |
| uint32_t st_value; |
| int st_size; |
| uint8_t st_type; |
| uint8_t st_shndx; |
| } coff_Sym; |
| |
| typedef struct coff_rel { |
| struct external_reloc *r_reloc; |
| int r_offset; |
| uint8_t r_type; |
| } coff_Rel; |
| |
| #define EXE_RELOC struct coff_rel |
| #define EXE_SYM struct coff_sym |
| |
| #endif /* CONFIG_FORMAT_COFF */ |
| |
| #ifdef CONFIG_FORMAT_MACH |
| |
| #include <mach-o/loader.h> |
| #include <mach-o/nlist.h> |
| #include <mach-o/reloc.h> |
| #include <mach-o/ppc/reloc.h> |
| |
| # define check_mach_header(x) (x.magic == MH_MAGIC) |
| typedef int32_t host_long; |
| typedef uint32_t host_ulong; |
| |
| struct nlist_extended |
| { |
| union { |
| char *n_name; |
| long n_strx; |
| } n_un; |
| unsigned char n_type; |
| unsigned char n_sect; |
| short st_desc; |
| unsigned long st_value; |
| unsigned long st_size; |
| }; |
| |
| #define EXE_RELOC struct relocation_info |
| #define EXE_SYM struct nlist_extended |
| |
| #endif /* CONFIG_FORMAT_MACH */ |
| |
| #include "bswap.h" |
| |
| enum { |
| OUT_GEN_OP, |
| OUT_CODE, |
| OUT_INDEX_OP, |
| }; |
| |
| /* all dynamically generated functions begin with this code */ |
| #define OP_PREFIX "op_" |
| |
| int do_swap; |
| |
| void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...) |
| { |
| va_list ap; |
| va_start(ap, fmt); |
| fprintf(stderr, "dyngen: "); |
| vfprintf(stderr, fmt, ap); |
| fprintf(stderr, "\n"); |
| va_end(ap); |
| exit(1); |
| } |
| |
| void *load_data(int fd, long offset, unsigned int size) |
| { |
| char *data; |
| |
| data = malloc(size); |
| if (!data) |
| return NULL; |
| lseek(fd, offset, SEEK_SET); |
| if (read(fd, data, size) != size) { |
| free(data); |
| return NULL; |
| } |
| return data; |
| } |
| |
| int strstart(const char *str, const char *val, const char **ptr) |
| { |
| const char *p, *q; |
| p = str; |
| q = val; |
| while (*q != '\0') { |
| if (*p != *q) |
| return 0; |
| p++; |
| q++; |
| } |
| if (ptr) |
| *ptr = p; |
| return 1; |
| } |
| |
| void pstrcpy(char *buf, int buf_size, const char *str) |
| { |
| int c; |
| char *q = buf; |
| |
| if (buf_size <= 0) |
| return; |
| |
| for(;;) { |
| c = *str++; |
| if (c == 0 || q >= buf + buf_size - 1) |
| break; |
| *q++ = c; |
| } |
| *q = '\0'; |
| } |
| |
| void swab16s(uint16_t *p) |
| { |
| *p = bswap16(*p); |
| } |
| |
| void swab32s(uint32_t *p) |
| { |
| *p = bswap32(*p); |
| } |
| |
| void swab64s(uint64_t *p) |
| { |
| *p = bswap64(*p); |
| } |
| |
| uint16_t get16(uint16_t *p) |
| { |
| uint16_t val; |
| val = *p; |
| if (do_swap) |
| val = bswap16(val); |
| return val; |
| } |
| |
| uint32_t get32(uint32_t *p) |
| { |
| uint32_t val; |
| val = *p; |
| if (do_swap) |
| val = bswap32(val); |
| return val; |
| } |
| |
| void put16(uint16_t *p, uint16_t val) |
| { |
| if (do_swap) |
| val = bswap16(val); |
| *p = val; |
| } |
| |
| void put32(uint32_t *p, uint32_t val) |
| { |
| if (do_swap) |
| val = bswap32(val); |
| *p = val; |
| } |
| |
| /* executable information */ |
| EXE_SYM *symtab; |
| int nb_syms; |
| int text_shndx; |
| uint8_t *text; |
| EXE_RELOC *relocs; |
| int nb_relocs; |
| |
| #ifdef CONFIG_FORMAT_ELF |
| |
| /* ELF file info */ |
| struct elf_shdr *shdr; |
| uint8_t **sdata; |
| struct elfhdr ehdr; |
| char *strtab; |
| |
| int elf_must_swap(struct elfhdr *h) |
| { |
| union { |
| uint32_t i; |
| uint8_t b[4]; |
| } swaptest; |
| |
| swaptest.i = 1; |
| return (h->e_ident[EI_DATA] == ELFDATA2MSB) != |
| (swaptest.b[0] == 0); |
| } |
| |
| void elf_swap_ehdr(struct elfhdr *h) |
| { |
| swab16s(&h->e_type); /* Object file type */ |
| swab16s(&h-> e_machine); /* Architecture */ |
| swab32s(&h-> e_version); /* Object file version */ |
| swabls(&h-> e_entry); /* Entry point virtual address */ |
| swabls(&h-> e_phoff); /* Program header table file offset */ |
| swabls(&h-> e_shoff); /* Section header table file offset */ |
| swab32s(&h-> e_flags); /* Processor-specific flags */ |
| swab16s(&h-> e_ehsize); /* ELF header size in bytes */ |
| swab16s(&h-> e_phentsize); /* Program header table entry size */ |
| swab16s(&h-> e_phnum); /* Program header table entry count */ |
| swab16s(&h-> e_shentsize); /* Section header table entry size */ |
| swab16s(&h-> e_shnum); /* Section header table entry count */ |
| swab16s(&h-> e_shstrndx); /* Section header string table index */ |
| } |
| |
| void elf_swap_shdr(struct elf_shdr *h) |
| { |
| swab32s(&h-> sh_name); /* Section name (string tbl index) */ |
| swab32s(&h-> sh_type); /* Section type */ |
| swabls(&h-> sh_flags); /* Section flags */ |
| swabls(&h-> sh_addr); /* Section virtual addr at execution */ |
| swabls(&h-> sh_offset); /* Section file offset */ |
| swabls(&h-> sh_size); /* Section size in bytes */ |
| swab32s(&h-> sh_link); /* Link to another section */ |
| swab32s(&h-> sh_info); /* Additional section information */ |
| swabls(&h-> sh_addralign); /* Section alignment */ |
| swabls(&h-> sh_entsize); /* Entry size if section holds table */ |
| } |
| |
| void elf_swap_phdr(struct elf_phdr *h) |
| { |
| swab32s(&h->p_type); /* Segment type */ |
| swabls(&h->p_offset); /* Segment file offset */ |
| swabls(&h->p_vaddr); /* Segment virtual address */ |
| swabls(&h->p_paddr); /* Segment physical address */ |
| swabls(&h->p_filesz); /* Segment size in file */ |
| swabls(&h->p_memsz); /* Segment size in memory */ |
| swab32s(&h->p_flags); /* Segment flags */ |
| swabls(&h->p_align); /* Segment alignment */ |
| } |
| |
| void elf_swap_rel(ELF_RELOC *rel) |
| { |
| swabls(&rel->r_offset); |
| swabls(&rel->r_info); |
| #ifdef ELF_USES_RELOCA |
| swabls(&rel->r_addend); |
| #endif |
| } |
| |
| struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr, |
| const char *name) |
| { |
| int i; |
| const char *shname; |
| struct elf_shdr *sec; |
| |
| for(i = 0; i < shnum; i++) { |
| sec = &shdr[i]; |
| if (!sec->sh_name) |
| continue; |
| shname = shstr + sec->sh_name; |
| if (!strcmp(shname, name)) |
| return sec; |
| } |
| return NULL; |
| } |
| |
| int find_reloc(int sh_index) |
| { |
| struct elf_shdr *sec; |
| int i; |
| |
| for(i = 0; i < ehdr.e_shnum; i++) { |
| sec = &shdr[i]; |
| if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index) |
| return i; |
| } |
| return 0; |
| } |
| |
| static host_ulong get_rel_offset(EXE_RELOC *rel) |
| { |
| return rel->r_offset; |
| } |
| |
| static char *get_rel_sym_name(EXE_RELOC *rel) |
| { |
| return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| } |
| |
| static char *get_sym_name(EXE_SYM *sym) |
| { |
| return strtab + sym->st_name; |
| } |
| |
| /* load an elf object file */ |
| int load_object(const char *filename) |
| { |
| int fd; |
| struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec; |
| int i, j; |
| ElfW(Sym) *sym; |
| char *shstr; |
| ELF_RELOC *rel; |
| |
| fd = open(filename, O_RDONLY); |
| if (fd < 0) |
| error("can't open file '%s'", filename); |
| |
| /* Read ELF header. */ |
| if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr)) |
| error("unable to read file header"); |
| |
| /* Check ELF identification. */ |
| if (ehdr.e_ident[EI_MAG0] != ELFMAG0 |
| || ehdr.e_ident[EI_MAG1] != ELFMAG1 |
| || ehdr.e_ident[EI_MAG2] != ELFMAG2 |
| || ehdr.e_ident[EI_MAG3] != ELFMAG3 |
| || ehdr.e_ident[EI_VERSION] != EV_CURRENT) { |
| error("bad ELF header"); |
| } |
| |
| do_swap = elf_must_swap(&ehdr); |
| if (do_swap) |
| elf_swap_ehdr(&ehdr); |
| if (ehdr.e_ident[EI_CLASS] != ELF_CLASS) |
| error("Unsupported ELF class"); |
| if (ehdr.e_type != ET_REL) |
| error("ELF object file expected"); |
| if (ehdr.e_version != EV_CURRENT) |
| error("Invalid ELF version"); |
| if (!elf_check_arch(ehdr.e_machine)) |
| error("Unsupported CPU (e_machine=%d)", ehdr.e_machine); |
| |
| /* read section headers */ |
| shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr)); |
| if (do_swap) { |
| for(i = 0; i < ehdr.e_shnum; i++) { |
| elf_swap_shdr(&shdr[i]); |
| } |
| } |
| |
| /* read all section data */ |
| sdata = malloc(sizeof(void *) * ehdr.e_shnum); |
| memset(sdata, 0, sizeof(void *) * ehdr.e_shnum); |
| |
| for(i = 0;i < ehdr.e_shnum; i++) { |
| sec = &shdr[i]; |
| if (sec->sh_type != SHT_NOBITS) |
| sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size); |
| } |
| |
| sec = &shdr[ehdr.e_shstrndx]; |
| shstr = sdata[ehdr.e_shstrndx]; |
| |
| /* swap relocations */ |
| for(i = 0; i < ehdr.e_shnum; i++) { |
| sec = &shdr[i]; |
| if (sec->sh_type == SHT_RELOC) { |
| nb_relocs = sec->sh_size / sec->sh_entsize; |
| if (do_swap) { |
| for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++) |
| elf_swap_rel(rel); |
| } |
| } |
| } |
| /* text section */ |
| |
| text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text"); |
| if (!text_sec) |
| error("could not find .text section"); |
| text_shndx = text_sec - shdr; |
| text = sdata[text_shndx]; |
| |
| /* find text relocations, if any */ |
| relocs = NULL; |
| nb_relocs = 0; |
| i = find_reloc(text_shndx); |
| if (i != 0) { |
| relocs = (ELF_RELOC *)sdata[i]; |
| nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize; |
| } |
| |
| symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab"); |
| if (!symtab_sec) |
| error("could not find .symtab section"); |
| strtab_sec = &shdr[symtab_sec->sh_link]; |
| |
| symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr]; |
| strtab = sdata[symtab_sec->sh_link]; |
| |
| nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym)); |
| if (do_swap) { |
| for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| swab32s(&sym->st_name); |
| swabls(&sym->st_value); |
| swabls(&sym->st_size); |
| swab16s(&sym->st_shndx); |
| } |
| } |
| close(fd); |
| return 0; |
| } |
| |
| #endif /* CONFIG_FORMAT_ELF */ |
| |
| #ifdef CONFIG_FORMAT_COFF |
| |
| /* COFF file info */ |
| struct external_scnhdr *shdr; |
| uint8_t **sdata; |
| struct external_filehdr fhdr; |
| struct external_syment *coff_symtab; |
| char *strtab; |
| int coff_text_shndx, coff_data_shndx; |
| |
| int data_shndx; |
| |
| #define STRTAB_SIZE 4 |
| |
| #define DIR32 0x06 |
| #define DISP32 0x14 |
| |
| #define T_FUNCTION 0x20 |
| #define C_EXTERNAL 2 |
| |
| void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym) |
| { |
| char *q; |
| int c, i, len; |
| |
| if (ext_sym->e.e.e_zeroes != 0) { |
| q = sym->st_name; |
| for(i = 0; i < 8; i++) { |
| c = ext_sym->e.e_name[i]; |
| if (c == '\0') |
| break; |
| *q++ = c; |
| } |
| *q = '\0'; |
| } else { |
| pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset); |
| } |
| |
| /* now convert the name to a C name (suppress the leading '_') */ |
| if (sym->st_name[0] == '_') { |
| len = strlen(sym->st_name); |
| memmove(sym->st_name, sym->st_name + 1, len - 1); |
| sym->st_name[len - 1] = '\0'; |
| } |
| } |
| |
| char *name_for_dotdata(struct coff_rel *rel) |
| { |
| int i; |
| struct coff_sym *sym; |
| uint32_t text_data; |
| |
| text_data = *(uint32_t *)(text + rel->r_offset); |
| |
| for (i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| if (sym->st_syment->e_scnum == data_shndx && |
| text_data >= sym->st_value && |
| text_data < sym->st_value + sym->st_size) { |
| |
| return sym->st_name; |
| |
| } |
| } |
| return NULL; |
| } |
| |
| static char *get_sym_name(EXE_SYM *sym) |
| { |
| return sym->st_name; |
| } |
| |
| static char *get_rel_sym_name(EXE_RELOC *rel) |
| { |
| char *name; |
| name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx)); |
| if (!strcmp(name, ".data")) |
| name = name_for_dotdata(rel); |
| if (name[0] == '.') |
| return NULL; |
| return name; |
| } |
| |
| static host_ulong get_rel_offset(EXE_RELOC *rel) |
| { |
| return rel->r_offset; |
| } |
| |
| struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name) |
| { |
| int i; |
| const char *shname; |
| struct external_scnhdr *sec; |
| |
| for(i = 0; i < shnum; i++) { |
| sec = &shdr[i]; |
| if (!sec->s_name) |
| continue; |
| shname = sec->s_name; |
| if (!strcmp(shname, name)) |
| return sec; |
| } |
| return NULL; |
| } |
| |
| /* load a coff object file */ |
| int load_object(const char *filename) |
| { |
| int fd; |
| struct external_scnhdr *sec, *text_sec, *data_sec; |
| int i; |
| struct external_syment *ext_sym; |
| struct external_reloc *coff_relocs; |
| struct external_reloc *ext_rel; |
| uint32_t *n_strtab; |
| EXE_SYM *sym; |
| EXE_RELOC *rel; |
| |
| fd = open(filename, O_RDONLY |
| #ifdef _WIN32 |
| | O_BINARY |
| #endif |
| ); |
| if (fd < 0) |
| error("can't open file '%s'", filename); |
| |
| /* Read COFF header. */ |
| if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr)) |
| error("unable to read file header"); |
| |
| /* Check COFF identification. */ |
| if (fhdr.f_magic != I386MAGIC) { |
| error("bad COFF header"); |
| } |
| do_swap = 0; |
| |
| /* read section headers */ |
| shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr)); |
| |
| /* read all section data */ |
| sdata = malloc(sizeof(void *) * fhdr.f_nscns); |
| memset(sdata, 0, sizeof(void *) * fhdr.f_nscns); |
| |
| const char *p; |
| for(i = 0;i < fhdr.f_nscns; i++) { |
| sec = &shdr[i]; |
| if (!strstart(sec->s_name, ".bss", &p)) |
| sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size); |
| } |
| |
| |
| /* text section */ |
| text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text"); |
| if (!text_sec) |
| error("could not find .text section"); |
| coff_text_shndx = text_sec - shdr; |
| text = sdata[coff_text_shndx]; |
| |
| /* data section */ |
| data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data"); |
| if (!data_sec) |
| error("could not find .data section"); |
| coff_data_shndx = data_sec - shdr; |
| |
| coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ); |
| for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) { |
| for(i=0;i<8;i++) |
| printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]); |
| printf("\n"); |
| } |
| |
| |
| n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE); |
| strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab); |
| |
| nb_syms = fhdr.f_nsyms; |
| |
| for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) { |
| if (strstart(ext_sym->e.e_name, ".text", NULL)) |
| text_shndx = ext_sym->e_scnum; |
| if (strstart(ext_sym->e.e_name, ".data", NULL)) |
| data_shndx = ext_sym->e_scnum; |
| } |
| |
| /* set coff symbol */ |
| symtab = malloc(sizeof(struct coff_sym) * nb_syms); |
| |
| int aux_size, j; |
| for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) { |
| memset(sym, 0, sizeof(*sym)); |
| sym->st_syment = ext_sym; |
| sym_ent_name(ext_sym, sym); |
| sym->st_value = ext_sym->e_value; |
| |
| aux_size = *(int8_t *)ext_sym->e_numaux; |
| if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) { |
| for (j = aux_size + 1; j < nb_syms - i; j++) { |
| if ((ext_sym + j)->e_scnum == text_shndx && |
| (ext_sym + j)->e_type == T_FUNCTION ){ |
| sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value; |
| break; |
| } else if (j == nb_syms - i - 1) { |
| sec = &shdr[coff_text_shndx]; |
| sym->st_size = sec->s_size - ext_sym->e_value; |
| break; |
| } |
| } |
| } else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) { |
| for (j = aux_size + 1; j < nb_syms - i; j++) { |
| if ((ext_sym + j)->e_scnum == data_shndx) { |
| sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value; |
| break; |
| } else if (j == nb_syms - i - 1) { |
| sec = &shdr[coff_data_shndx]; |
| sym->st_size = sec->s_size - ext_sym->e_value; |
| break; |
| } |
| } |
| } else { |
| sym->st_size = 0; |
| } |
| |
| sym->st_type = ext_sym->e_type; |
| sym->st_shndx = ext_sym->e_scnum; |
| } |
| |
| |
| /* find text relocations, if any */ |
| sec = &shdr[coff_text_shndx]; |
| coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ); |
| nb_relocs = sec->s_nreloc; |
| |
| /* set coff relocation */ |
| relocs = malloc(sizeof(struct coff_rel) * nb_relocs); |
| for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs; |
| i++, ext_rel++, rel++) { |
| memset(rel, 0, sizeof(*rel)); |
| rel->r_reloc = ext_rel; |
| rel->r_offset = *(uint32_t *)ext_rel->r_vaddr; |
| rel->r_type = *(uint16_t *)ext_rel->r_type; |
| } |
| return 0; |
| } |
| |
| #endif /* CONFIG_FORMAT_COFF */ |
| |
| #ifdef CONFIG_FORMAT_MACH |
| |
| /* File Header */ |
| struct mach_header mach_hdr; |
| |
| /* commands */ |
| struct segment_command *segment = 0; |
| struct dysymtab_command *dysymtabcmd = 0; |
| struct symtab_command *symtabcmd = 0; |
| |
| /* section */ |
| struct section *section_hdr; |
| struct section *text_sec_hdr; |
| uint8_t **sdata; |
| |
| /* relocs */ |
| struct relocation_info *relocs; |
| |
| /* symbols */ |
| EXE_SYM *symtab; |
| struct nlist *symtab_std; |
| char *strtab; |
| |
| /* indirect symbols */ |
| uint32_t *tocdylib; |
| |
| /* Utility functions */ |
| |
| static inline char *find_str_by_index(int index) |
| { |
| return strtab+index; |
| } |
| |
| /* Used by dyngen common code */ |
| static char *get_sym_name(EXE_SYM *sym) |
| { |
| char *name = find_str_by_index(sym->n_un.n_strx); |
| |
| if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */ |
| return "debug"; |
| |
| if(!name) |
| return name; |
| if(name[0]=='_') |
| return name + 1; |
| else |
| return name; |
| } |
| |
| /* find a section index given its segname, sectname */ |
| static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname, |
| const char *sectname) |
| { |
| int i; |
| struct section *sec = section_hdr; |
| |
| for(i = 0; i < shnum; i++, sec++) { |
| if (!sec->segname || !sec->sectname) |
| continue; |
| if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname)) |
| return i; |
| } |
| return -1; |
| } |
| |
| /* find a section header given its segname, sectname */ |
| struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname, |
| const char *sectname) |
| { |
| int index = find_mach_sec_index(section_hdr, shnum, segname, sectname); |
| if(index == -1) |
| return NULL; |
| return section_hdr+index; |
| } |
| |
| |
| static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value) |
| { |
| struct scattered_relocation_info * scarel; |
| |
| if(R_SCATTERED & rel->r_address) { |
| scarel = (struct scattered_relocation_info*)rel; |
| if(scarel->r_type != PPC_RELOC_PAIR) |
| error("fetch_next_pair_value: looking for a pair which was not found (1)"); |
| *value = scarel->r_value; |
| } else { |
| if(rel->r_type != PPC_RELOC_PAIR) |
| error("fetch_next_pair_value: looking for a pair which was not found (2)"); |
| *value = rel->r_address; |
| } |
| } |
| |
| /* find a sym name given its value, in a section number */ |
| static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset ) |
| { |
| int i, ret = -1; |
| |
| for( i = 0 ; i < nb_syms; i++ ) |
| { |
| if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) && |
| (symtab[i].n_sect == sectnum) && (symtab[i].st_value <= value) ) |
| { |
| if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) ) |
| ret = i; |
| } |
| } |
| if( ret < 0 ) { |
| *offset = 0; |
| return 0; |
| } else { |
| *offset = value - symtab[ret].st_value; |
| return get_sym_name(&symtab[ret]); |
| } |
| } |
| |
| /* |
| * Find symbol name given a (virtual) address, and a section which is of type |
| * S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS |
| */ |
| static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr) |
| { |
| unsigned int tocindex, symindex, size; |
| const char *name = 0; |
| |
| /* Sanity check */ |
| if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) ) |
| return (char*)0; |
| |
| if( sec_hdr->flags & S_SYMBOL_STUBS ){ |
| size = sec_hdr->reserved2; |
| if(size == 0) |
| error("size = 0"); |
| |
| } |
| else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS || |
| sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS) |
| size = sizeof(unsigned long); |
| else |
| return 0; |
| |
| /* Compute our index in toc */ |
| tocindex = (address - sec_hdr->addr)/size; |
| symindex = tocdylib[sec_hdr->reserved1 + tocindex]; |
| |
| name = get_sym_name(&symtab[symindex]); |
| |
| return name; |
| } |
| |
| static const char * find_reloc_name_given_its_address(int address) |
| { |
| unsigned int i; |
| for(i = 0; i < segment->nsects ; i++) |
| { |
| const char * name = find_reloc_name_in_sec_ptr(address, §ion_hdr[i]); |
| if((long)name != -1) |
| return name; |
| } |
| return 0; |
| } |
| |
| static const char * get_reloc_name(EXE_RELOC * rel, int * sslide) |
| { |
| char * name = 0; |
| struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel; |
| int sectnum = rel->r_symbolnum; |
| int sectoffset; |
| int other_half=0; |
| |
| /* init the slide value */ |
| *sslide = 0; |
| |
| if(R_SCATTERED & rel->r_address) |
| return (char *)find_reloc_name_given_its_address(sca_rel->r_value); |
| |
| if(rel->r_extern) |
| { |
| /* ignore debug sym */ |
| if ( symtab[rel->r_symbolnum].n_type & N_STAB ) |
| return 0; |
| return get_sym_name(&symtab[rel->r_symbolnum]); |
| } |
| |
| /* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */ |
| sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff; |
| |
| if(sectnum==0xffffff) |
| return 0; |
| |
| /* Sanity Check */ |
| if(sectnum > segment->nsects) |
| error("sectnum > segment->nsects"); |
| |
| switch(rel->r_type) |
| { |
| case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16); |
| break; |
| case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff); |
| break; |
| case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff); |
| break; |
| case PPC_RELOC_BR24: |
| sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc ); |
| if (sectoffset & 0x02000000) sectoffset |= 0xfc000000; |
| break; |
| default: |
| error("switch(rel->type) not found"); |
| } |
| |
| if(rel->r_pcrel) |
| sectoffset += rel->r_address; |
| |
| if (rel->r_type == PPC_RELOC_BR24) |
| name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, §ion_hdr[sectnum-1]); |
| |
| /* search it in the full symbol list, if not found */ |
| if(!name) |
| name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide); |
| |
| return name; |
| } |
| |
| /* Used by dyngen common code */ |
| static const char * get_rel_sym_name(EXE_RELOC * rel) |
| { |
| int sslide; |
| return get_reloc_name( rel, &sslide); |
| } |
| |
| /* Used by dyngen common code */ |
| static host_ulong get_rel_offset(EXE_RELOC *rel) |
| { |
| struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel; |
| if(R_SCATTERED & rel->r_address) |
| return sca_rel->r_address; |
| else |
| return rel->r_address; |
| } |
| |
| /* load a mach-o object file */ |
| int load_object(const char *filename) |
| { |
| int fd; |
| unsigned int offset_to_segment = 0; |
| unsigned int offset_to_dysymtab = 0; |
| unsigned int offset_to_symtab = 0; |
| struct load_command lc; |
| unsigned int i, j; |
| EXE_SYM *sym; |
| struct nlist *syment; |
| |
| fd = open(filename, O_RDONLY); |
| if (fd < 0) |
| error("can't open file '%s'", filename); |
| |
| /* Read Mach header. */ |
| if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr)) |
| error("unable to read file header"); |
| |
| /* Check Mach identification. */ |
| if (!check_mach_header(mach_hdr)) { |
| error("bad Mach header"); |
| } |
| |
| if (mach_hdr.cputype != CPU_TYPE_POWERPC) |
| error("Unsupported CPU"); |
| |
| if (mach_hdr.filetype != MH_OBJECT) |
| error("Unsupported Mach Object"); |
| |
| /* read segment headers */ |
| for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++) |
| { |
| if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command)) |
| error("unable to read load_command"); |
| if(lc.cmd == LC_SEGMENT) |
| { |
| offset_to_segment = j; |
| lseek(fd, offset_to_segment, SEEK_SET); |
| segment = malloc(sizeof(struct segment_command)); |
| if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command)) |
| error("unable to read LC_SEGMENT"); |
| } |
| if(lc.cmd == LC_DYSYMTAB) |
| { |
| offset_to_dysymtab = j; |
| lseek(fd, offset_to_dysymtab, SEEK_SET); |
| dysymtabcmd = malloc(sizeof(struct dysymtab_command)); |
| if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command)) |
| error("unable to read LC_DYSYMTAB"); |
| } |
| if(lc.cmd == LC_SYMTAB) |
| { |
| offset_to_symtab = j; |
| lseek(fd, offset_to_symtab, SEEK_SET); |
| symtabcmd = malloc(sizeof(struct symtab_command)); |
| if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command)) |
| error("unable to read LC_SYMTAB"); |
| } |
| j+=lc.cmdsize; |
| |
| lseek(fd, j, SEEK_SET); |
| } |
| |
| if(!segment) |
| error("unable to find LC_SEGMENT"); |
| |
| /* read section headers */ |
| section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section)); |
| |
| /* read all section data */ |
| sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects); |
| memset(sdata, 0, sizeof(void *) * segment->nsects); |
| |
| /* Load the data in section data */ |
| for(i = 0; i < segment->nsects; i++) { |
| sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size); |
| } |
| |
| /* text section */ |
| text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT); |
| i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT); |
| if (i == -1 || !text_sec_hdr) |
| error("could not find __TEXT,__text section"); |
| text = sdata[i]; |
| |
| /* Make sure dysym was loaded */ |
| if(!(int)dysymtabcmd) |
| error("could not find __DYSYMTAB segment"); |
| |
| /* read the table of content of the indirect sym */ |
| tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) ); |
| |
| /* Make sure symtab was loaded */ |
| if(!(int)symtabcmd) |
| error("could not find __SYMTAB segment"); |
| nb_syms = symtabcmd->nsyms; |
| |
| symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist)); |
| strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize); |
| |
| symtab = malloc(sizeof(EXE_SYM) * nb_syms); |
| |
| /* Now transform the symtab, to an extended version, with the sym size, and the C name */ |
| for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) { |
| struct nlist *sym_follow, *sym_next = 0; |
| unsigned int j; |
| memset(sym, 0, sizeof(*sym)); |
| |
| if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */ |
| continue; |
| |
| memcpy(sym, syment, sizeof(*syment)); |
| |
| /* Find the following symbol in order to get the current symbol size */ |
| for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) { |
| if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value)) |
| continue; |
| if(!sym_next) { |
| sym_next = sym_follow; |
| continue; |
| } |
| if(!(sym_next->n_value > sym_follow->n_value)) |
| continue; |
| sym_next = sym_follow; |
| } |
| if(sym_next) |
| sym->st_size = sym_next->n_value - sym->st_value; |
| else |
| sym->st_size = text_sec_hdr->size - sym->st_value; |
| } |
| |
| /* Find Reloc */ |
| relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info)); |
| nb_relocs = text_sec_hdr->nreloc; |
| |
| close(fd); |
| return 0; |
| } |
| |
| #endif /* CONFIG_FORMAT_MACH */ |
| |
| void get_reloc_expr(char *name, int name_size, const char *sym_name) |
| { |
| const char *p; |
| |
| if (strstart(sym_name, "__op_param", &p)) { |
| snprintf(name, name_size, "param%s", p); |
| } else if (strstart(sym_name, "__op_gen_label", &p)) { |
| snprintf(name, name_size, "gen_labels[param%s]", p); |
| } else { |
| #ifdef HOST_SPARC |
| if (sym_name[0] == '.') |
| snprintf(name, name_size, |
| "(long)(&__dot_%s)", |
| sym_name + 1); |
| else |
| #endif |
| snprintf(name, name_size, "(long)(&%s)", sym_name); |
| } |
| } |
| |
| #ifdef HOST_IA64 |
| |
| #define PLT_ENTRY_SIZE 16 /* 1 bundle containing "brl" */ |
| |
| struct plt_entry { |
| struct plt_entry *next; |
| const char *name; |
| unsigned long addend; |
| } *plt_list; |
| |
| static int |
| get_plt_index (const char *name, unsigned long addend) |
| { |
| struct plt_entry *plt, *prev= NULL; |
| int index = 0; |
| |
| /* see if we already have an entry for this target: */ |
| for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next) |
| if (strcmp(plt->name, name) == 0 && plt->addend == addend) |
| return index; |
| |
| /* nope; create a new PLT entry: */ |
| |
| plt = malloc(sizeof(*plt)); |
| if (!plt) { |
| perror("malloc"); |
| exit(1); |
| } |
| memset(plt, 0, sizeof(*plt)); |
| plt->name = strdup(name); |
| plt->addend = addend; |
| |
| /* append to plt-list: */ |
| if (prev) |
| prev->next = plt; |
| else |
| plt_list = plt; |
| return index; |
| } |
| |
| #endif |
| |
| #ifdef HOST_ARM |
| |
| int arm_emit_ldr_info(const char *name, unsigned long start_offset, |
| FILE *outfile, uint8_t *p_start, uint8_t *p_end, |
| ELF_RELOC *relocs, int nb_relocs) |
| { |
| uint8_t *p; |
| uint32_t insn; |
| int offset, min_offset, pc_offset, data_size; |
| uint8_t data_allocated[1024]; |
| unsigned int data_index; |
| |
| memset(data_allocated, 0, sizeof(data_allocated)); |
| |
| p = p_start; |
| min_offset = p_end - p_start; |
| while (p < p_start + min_offset) { |
| insn = get32((uint32_t *)p); |
| if ((insn & 0x0d5f0000) == 0x051f0000) { |
| /* ldr reg, [pc, #im] */ |
| offset = insn & 0xfff; |
| if (!(insn & 0x00800000)) |
| offset = -offset; |
| if ((offset & 3) !=0) |
| error("%s:%04x: ldr pc offset must be 32 bit aligned", |
| name, start_offset + p - p_start); |
| pc_offset = p - p_start + offset + 8; |
| if (pc_offset <= (p - p_start) || |
| pc_offset >= (p_end - p_start)) |
| error("%s:%04x: ldr pc offset must point inside the function code", |
| name, start_offset + p - p_start); |
| if (pc_offset < min_offset) |
| min_offset = pc_offset; |
| if (outfile) { |
| /* ldr position */ |
| fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n", |
| p - p_start); |
| /* ldr data index */ |
| data_index = ((p_end - p_start) - pc_offset - 4) >> 2; |
| fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n", |
| data_index); |
| fprintf(outfile, " arm_ldr_ptr++;\n"); |
| if (data_index >= sizeof(data_allocated)) |
| error("%s: too many data", name); |
| if (!data_allocated[data_index]) { |
| ELF_RELOC *rel; |
| int i, addend, type; |
| const char *sym_name, *p; |
| char relname[1024]; |
| |
| data_allocated[data_index] = 1; |
| |
| /* data value */ |
| addend = get32((uint32_t *)(p_start + pc_offset)); |
| relname[0] = '\0'; |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| if (rel->r_offset == (pc_offset + start_offset)) { |
| sym_name = get_rel_sym_name(rel); |
| /* the compiler leave some unnecessary references to the code */ |
| get_reloc_expr(relname, sizeof(relname), sym_name); |
| type = ELF32_R_TYPE(rel->r_info); |
| if (type != R_ARM_ABS32) |
| error("%s: unsupported data relocation", name); |
| break; |
| } |
| } |
| fprintf(outfile, " arm_data_ptr[%d] = 0x%x", |
| data_index, addend); |
| if (relname[0] != '\0') |
| fprintf(outfile, " + %s", relname); |
| fprintf(outfile, ";\n"); |
| } |
| } |
| } |
| p += 4; |
| } |
| data_size = (p_end - p_start) - min_offset; |
| if (data_size > 0 && outfile) { |
| fprintf(outfile, " arm_data_ptr += %d;\n", data_size >> 2); |
| } |
| |
| /* the last instruction must be a mov pc, lr */ |
| if (p == p_start) |
| goto arm_ret_error; |
| p -= 4; |
| insn = get32((uint32_t *)p); |
| if ((insn & 0xffff0000) != 0xe91b0000) { |
| arm_ret_error: |
| if (!outfile) |
| printf("%s: invalid epilog\n", name); |
| } |
| return p - p_start; |
| } |
| #endif |
| |
| |
| #define MAX_ARGS 3 |
| |
| /* generate op code */ |
| void gen_code(const char *name, host_ulong offset, host_ulong size, |
| FILE *outfile, int gen_switch) |
| { |
| int copy_size = 0; |
| uint8_t *p_start, *p_end; |
| host_ulong start_offset; |
| int nb_args, i, n; |
| uint8_t args_present[MAX_ARGS]; |
| const char *sym_name, *p; |
| EXE_RELOC *rel; |
| |
| /* Compute exact size excluding prologue and epilogue instructions. |
| * Increment start_offset to skip epilogue instructions, then compute |
| * copy_size the indicate the size of the remaining instructions (in |
| * bytes). |
| */ |
| p_start = text + offset; |
| p_end = p_start + size; |
| start_offset = offset; |
| #if defined(HOST_I386) || defined(HOST_X86_64) |
| #ifdef CONFIG_FORMAT_COFF |
| { |
| uint8_t *p; |
| p = p_end - 1; |
| if (p == p_start) |
| error("empty code for %s", name); |
| while (*p != 0xc3) { |
| p--; |
| if (p <= p_start) |
| error("ret or jmp expected at the end of %s", name); |
| } |
| copy_size = p - p_start; |
| } |
| #else |
| { |
| int len; |
| len = p_end - p_start; |
| if (len == 0) |
| error("empty code for %s", name); |
| if (p_end[-1] == 0xc3) { |
| len--; |
| } else { |
| error("ret or jmp expected at the end of %s", name); |
| } |
| copy_size = len; |
| } |
| #endif |
| #elif defined(HOST_PPC) |
| { |
| uint8_t *p; |
| p = (void *)(p_end - 4); |
| if (p == p_start) |
| error("empty code for %s", name); |
| if (get32((uint32_t *)p) != 0x4e800020) |
| error("blr expected at the end of %s", name); |
| copy_size = p - p_start; |
| } |
| #elif defined(HOST_S390) |
| { |
| uint8_t *p; |
| p = (void *)(p_end - 2); |
| if (p == p_start) |
| error("empty code for %s", name); |
| if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4) |
| error("br %%r14 expected at the end of %s", name); |
| copy_size = p - p_start; |
| } |
| #elif defined(HOST_ALPHA) |
| { |
| uint8_t *p; |
| p = p_end - 4; |
| #if 0 |
| /* XXX: check why it occurs */ |
| if (p == p_start) |
| error("empty code for %s", name); |
| #endif |
| if (get32((uint32_t *)p) != 0x6bfa8001) |
| error("ret expected at the end of %s", name); |
| copy_size = p - p_start; |
| } |
| #elif defined(HOST_IA64) |
| { |
| uint8_t *p; |
| p = (void *)(p_end - 4); |
| if (p == p_start) |
| error("empty code for %s", name); |
| /* br.ret.sptk.many b0;; */ |
| /* 08 00 84 00 */ |
| if (get32((uint32_t *)p) != 0x00840008) |
| error("br.ret.sptk.many b0;; expected at the end of %s", name); |
| copy_size = p_end - p_start; |
| } |
| #elif defined(HOST_SPARC) |
| { |
| uint32_t start_insn, end_insn1, end_insn2; |
| uint8_t *p; |
| p = (void *)(p_end - 8); |
| if (p <= p_start) |
| error("empty code for %s", name); |
| start_insn = get32((uint32_t *)(p_start + 0x0)); |
| end_insn1 = get32((uint32_t *)(p + 0x0)); |
| end_insn2 = get32((uint32_t *)(p + 0x4)); |
| if ((start_insn & ~0x1fff) == 0x9de3a000) { |
| p_start += 0x4; |
| start_offset += 0x4; |
| if ((int)(start_insn | ~0x1fff) < -128) |
| error("Found bogus save at the start of %s", name); |
| if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
| error("ret; restore; not found at end of %s", name); |
| } else { |
| error("No save at the beginning of %s", name); |
| } |
| #if 0 |
| /* Skip a preceeding nop, if present. */ |
| if (p > p_start) { |
| skip_insn = get32((uint32_t *)(p - 0x4)); |
| if (skip_insn == 0x01000000) |
| p -= 4; |
| } |
| #endif |
| copy_size = p - p_start; |
| } |
| #elif defined(HOST_SPARC64) |
| { |
| uint32_t start_insn, end_insn1, end_insn2, skip_insn; |
| uint8_t *p; |
| p = (void *)(p_end - 8); |
| if (p <= p_start) |
| error("empty code for %s", name); |
| start_insn = get32((uint32_t *)(p_start + 0x0)); |
| end_insn1 = get32((uint32_t *)(p + 0x0)); |
| end_insn2 = get32((uint32_t *)(p + 0x4)); |
| if ((start_insn & ~0x1fff) == 0x9de3a000) { |
| p_start += 0x4; |
| start_offset += 0x4; |
| if ((int)(start_insn | ~0x1fff) < -256) |
| error("Found bogus save at the start of %s", name); |
| if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
| error("ret; restore; not found at end of %s", name); |
| } else { |
| error("No save at the beginning of %s", name); |
| } |
| |
| /* Skip a preceeding nop, if present. */ |
| if (p > p_start) { |
| skip_insn = get32((uint32_t *)(p - 0x4)); |
| if (skip_insn == 0x01000000) |
| p -= 4; |
| } |
| |
| copy_size = p - p_start; |
| } |
| #elif defined(HOST_ARM) |
| { |
| if ((p_end - p_start) <= 16) |
| error("%s: function too small", name); |
| if (get32((uint32_t *)p_start) != 0xe1a0c00d || |
| (get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 || |
| get32((uint32_t *)(p_start + 8)) != 0xe24cb004) |
| error("%s: invalid prolog", name); |
| p_start += 12; |
| start_offset += 12; |
| copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end, |
| relocs, nb_relocs); |
| } |
| #elif defined(HOST_M68K) |
| { |
| uint8_t *p; |
| p = (void *)(p_end - 2); |
| if (p == p_start) |
| error("empty code for %s", name); |
| // remove NOP's, probably added for alignment |
| while ((get16((uint16_t *)p) == 0x4e71) && |
| (p>p_start)) |
| p -= 2; |
| if (get16((uint16_t *)p) != 0x4e75) |
| error("rts expected at the end of %s", name); |
| copy_size = p - p_start; |
| } |
| #else |
| #error unsupported CPU |
| #endif |
| |
| /* compute the number of arguments by looking at the relocations */ |
| for(i = 0;i < MAX_ARGS; i++) |
| args_present[i] = 0; |
| |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| host_ulong offset = get_rel_offset(rel); |
| if (offset >= start_offset && |
| offset < start_offset + (p_end - p_start)) { |
| sym_name = get_rel_sym_name(rel); |
| if(!sym_name) |
| continue; |
| if (strstart(sym_name, "__op_param", &p) || |
| strstart(sym_name, "__op_gen_label", &p)) { |
| n = strtoul(p, NULL, 10); |
| if (n > MAX_ARGS) |
| error("too many arguments in %s", name); |
| args_present[n - 1] = 1; |
| } |
| } |
| } |
| |
| nb_args = 0; |
| while (nb_args < MAX_ARGS && args_present[nb_args]) |
| nb_args++; |
| for(i = nb_args; i < MAX_ARGS; i++) { |
| if (args_present[i]) |
| error("inconsistent argument numbering in %s", name); |
| } |
| |
| if (gen_switch == 2) { |
| fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size); |
| } else if (gen_switch == 1) { |
| |
| /* output C code */ |
| fprintf(outfile, "case INDEX_%s: {\n", name); |
| if (nb_args > 0) { |
| fprintf(outfile, " long "); |
| for(i = 0; i < nb_args; i++) { |
| if (i != 0) |
| fprintf(outfile, ", "); |
| fprintf(outfile, "param%d", i + 1); |
| } |
| fprintf(outfile, ";\n"); |
| } |
| #if defined(HOST_IA64) |
| fprintf(outfile, " extern char %s;\n", name); |
| #else |
| fprintf(outfile, " extern void %s();\n", name); |
| #endif |
| |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| host_ulong offset = get_rel_offset(rel); |
| if (offset >= start_offset && |
| offset < start_offset + (p_end - p_start)) { |
| sym_name = get_rel_sym_name(rel); |
| if(!sym_name) |
| continue; |
| if (*sym_name && |
| !strstart(sym_name, "__op_param", NULL) && |
| !strstart(sym_name, "__op_jmp", NULL) && |
| !strstart(sym_name, "__op_gen_label", NULL)) { |
| #if defined(HOST_SPARC) |
| if (sym_name[0] == '.') { |
| fprintf(outfile, |
| "extern char __dot_%s __asm__(\"%s\");\n", |
| sym_name+1, sym_name); |
| continue; |
| } |
| #endif |
| #if defined(__APPLE__) |
| /* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */ |
| fprintf(outfile, "extern char %s __attribute__((unused));\n", sym_name); |
| #elif defined(HOST_IA64) |
| if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B) |
| /* |
| * PCREL21 br.call targets generally |
| * are out of range and need to go |
| * through an "import stub". |
| */ |
| fprintf(outfile, " extern char %s;\n", |
| sym_name); |
| #else |
| fprintf(outfile, "extern char %s;\n", sym_name); |
| #endif |
| } |
| } |
| } |
| |
| fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n", |
| name, (int)(start_offset - offset), copy_size); |
| |
| /* emit code offset information */ |
| { |
| EXE_SYM *sym; |
| const char *sym_name, *p; |
| unsigned long val; |
| int n; |
| |
| for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| sym_name = get_sym_name(sym); |
| if (strstart(sym_name, "__op_label", &p)) { |
| uint8_t *ptr; |
| unsigned long offset; |
| |
| /* test if the variable refers to a label inside |
| the code we are generating */ |
| #ifdef CONFIG_FORMAT_COFF |
| if (sym->st_shndx == text_shndx) { |
| ptr = sdata[coff_text_shndx]; |
| } else if (sym->st_shndx == data_shndx) { |
| ptr = sdata[coff_data_shndx]; |
| } else { |
| ptr = NULL; |
| } |
| #elif defined(CONFIG_FORMAT_MACH) |
| if(!sym->n_sect) |
| continue; |
| ptr = sdata[sym->n_sect-1]; |
| #else |
| ptr = sdata[sym->st_shndx]; |
| #endif |
| if (!ptr) |
| error("__op_labelN in invalid section"); |
| offset = sym->st_value; |
| #ifdef CONFIG_FORMAT_MACH |
| offset -= section_hdr[sym->n_sect-1].addr; |
| #endif |
| val = *(unsigned long *)(ptr + offset); |
| #ifdef ELF_USES_RELOCA |
| { |
| int reloc_shndx, nb_relocs1, j; |
| |
| /* try to find a matching relocation */ |
| reloc_shndx = find_reloc(sym->st_shndx); |
| if (reloc_shndx) { |
| nb_relocs1 = shdr[reloc_shndx].sh_size / |
| shdr[reloc_shndx].sh_entsize; |
| rel = (ELF_RELOC *)sdata[reloc_shndx]; |
| for(j = 0; j < nb_relocs1; j++) { |
| if (rel->r_offset == offset) { |
| val = rel->r_addend; |
| break; |
| } |
| rel++; |
| } |
| } |
| } |
| #endif |
| if (val >= start_offset && val <= start_offset + copy_size) { |
| n = strtol(p, NULL, 10); |
| fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, (long)(val - start_offset)); |
| } |
| } |
| } |
| } |
| |
| /* load parameres in variables */ |
| for(i = 0; i < nb_args; i++) { |
| fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1); |
| } |
| |
| /* patch relocations */ |
| #if defined(HOST_I386) |
| { |
| char name[256]; |
| int type; |
| int addend; |
| int reloc_offset; |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| if (rel->r_offset >= start_offset && |
| rel->r_offset < start_offset + copy_size) { |
| sym_name = get_rel_sym_name(rel); |
| if (!sym_name) |
| continue; |
| reloc_offset = rel->r_offset - start_offset; |
| if (strstart(sym_name, "__op_jmp", &p)) { |
| int n; |
| n = strtol(p, NULL, 10); |
| /* __op_jmp relocations are done at |
| runtime to do translated block |
| chaining: the offset of the instruction |
| needs to be stored */ |
| fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n", |
| n, reloc_offset); |
| continue; |
| } |
| |
| get_reloc_expr(name, sizeof(name), sym_name); |
| addend = get32((uint32_t *)(text + rel->r_offset)); |
| #ifdef CONFIG_FORMAT_ELF |
| type = ELF32_R_TYPE(rel->r_info); |
| switch(type) { |
| case R_386_32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_386_PC32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n", |
| reloc_offset, name, reloc_offset, addend); |
| break; |
| default: |
| error("unsupported i386 relocation (%d)", type); |
| } |
| #elif defined(CONFIG_FORMAT_COFF) |
| { |
| char *temp_name; |
| int j; |
| EXE_SYM *sym; |
| temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx)); |
| if (!strcmp(temp_name, ".data")) { |
| for (j = 0, sym = symtab; j < nb_syms; j++, sym++) { |
| if (strstart(sym->st_name, sym_name, NULL)) { |
| addend -= sym->st_value; |
| } |
| } |
| } |
| } |
| type = rel->r_type; |
| switch(type) { |
| case DIR32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case DISP32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n", |
| reloc_offset, name, reloc_offset, addend); |
| break; |
| default: |
| error("unsupported i386 relocation (%d)", type); |
| } |
| #else |
| #error unsupport object format |
| #endif |
| } |
| } |
| } |
| #elif defined(HOST_X86_64) |
| { |
| char name[256]; |
| int type; |
| int addend; |
| int reloc_offset; |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| if (rel->r_offset >= start_offset && |
| rel->r_offset < start_offset + copy_size) { |
| sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| get_reloc_expr(name, sizeof(name), sym_name); |
| type = ELF32_R_TYPE(rel->r_info); |
| addend = rel->r_addend; |
| reloc_offset = rel->r_offset - start_offset; |
| switch(type) { |
| case R_X86_64_32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_X86_64_32S: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_X86_64_PC32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n", |
| reloc_offset, name, reloc_offset, addend); |
| break; |
| default: |
| error("unsupported X86_64 relocation (%d)", type); |
| } |
| } |
| } |
| } |
| #elif defined(HOST_PPC) |
| { |
| #ifdef CONFIG_FORMAT_ELF |
| char name[256]; |
| int type; |
| int addend; |
| int reloc_offset; |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| if (rel->r_offset >= start_offset && |
| rel->r_offset < start_offset + copy_size) { |
| sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| reloc_offset = rel->r_offset - start_offset; |
| if (strstart(sym_name, "__op_jmp", &p)) { |
| int n; |
| n = strtol(p, NULL, 10); |
| /* __op_jmp relocations are done at |
| runtime to do translated block |
| chaining: the offset of the instruction |
| needs to be stored */ |
| fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n", |
| n, reloc_offset); |
| continue; |
| } |
| |
| get_reloc_expr(name, sizeof(name), sym_name); |
| type = ELF32_R_TYPE(rel->r_info); |
| addend = rel->r_addend; |
| switch(type) { |
| case R_PPC_ADDR32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_PPC_ADDR16_LO: |
| fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n", |
| reloc_offset, name, addend); |
| break; |
| case R_PPC_ADDR16_HI: |
| fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_PPC_ADDR16_HA: |
| fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_PPC_REL24: |
| /* warning: must be at 32 MB distancy */ |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n", |
| reloc_offset, reloc_offset, name, reloc_offset, addend); |
| break; |
| default: |
| error("unsupported powerpc relocation (%d)", type); |
| } |
| } |
| } |
| #elif defined(CONFIG_FORMAT_MACH) |
| struct scattered_relocation_info *scarel; |
| struct relocation_info * rel; |
| char final_sym_name[256]; |
| const char *sym_name; |
| const char *p; |
| int slide, sslide; |
| int i; |
| |
| for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
| unsigned int offset, length, value = 0; |
| unsigned int type, pcrel, isym = 0; |
| unsigned int usesym = 0; |
| |
| if(R_SCATTERED & rel->r_address) { |
| scarel = (struct scattered_relocation_info*)rel; |
| offset = (unsigned int)scarel->r_address; |
| length = scarel->r_length; |
| pcrel = scarel->r_pcrel; |
| type = scarel->r_type; |
| value = scarel->r_value; |
| } else { |
| value = isym = rel->r_symbolnum; |
| usesym = (rel->r_extern); |
| offset = rel->r_address; |
| length = rel->r_length; |
| pcrel = rel->r_pcrel; |
| type = rel->r_type; |
| } |
| |
| slide = offset - start_offset; |
| |
| if (!(offset >= start_offset && offset < start_offset + size)) |
| continue; /* not in our range */ |
| |
| sym_name = get_reloc_name(rel, &sslide); |
| |
| if(usesym && symtab[isym].n_type & N_STAB) |
| continue; /* don't handle STAB (debug sym) */ |
| |
| if (sym_name && strstart(sym_name, "__op_jmp", &p)) { |
| int n; |
| n = strtol(p, NULL, 10); |
| fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n", |
| n, slide); |
| continue; /* Nothing more to do */ |
| } |
| |
| if(!sym_name) |
| { |
| fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n", |
| name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type); |
| continue; /* dunno how to handle without final_sym_name */ |
| } |
| |
| get_reloc_expr(final_sym_name, sizeof(final_sym_name), |
| sym_name); |
| switch(type) { |
| case PPC_RELOC_BR24: |
| if (!strstart(sym_name,"__op_gen_label",&p)) { |
| fprintf(outfile, "{\n"); |
| fprintf(outfile, " uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide); |
| 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", |
| slide, slide, name, sslide ); |
| fprintf(outfile, "}\n"); |
| } else { |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n", |
| slide, slide, final_sym_name, slide); |
| } |
| break; |
| case PPC_RELOC_HI16: |
| fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n", |
| slide, final_sym_name, sslide); |
| break; |
| case PPC_RELOC_LO16: |
| fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n", |
| slide, final_sym_name, sslide); |
| break; |
| case PPC_RELOC_HA16: |
| fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n", |
| slide, final_sym_name, sslide); |
| break; |
| default: |
| error("unsupported powerpc relocation (%d)", type); |
| } |
| } |
| #else |
| #error unsupport object format |
| #endif |
| } |
| #elif defined(HOST_S390) |
| { |
| char name[256]; |
| int type; |
| int addend; |
| int reloc_offset; |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| if (rel->r_offset >= start_offset && |
| rel->r_offset < start_offset + copy_size) { |
| sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| get_reloc_expr(name, sizeof(name), sym_name); |
| type = ELF32_R_TYPE(rel->r_info); |
| addend = rel->r_addend; |
| reloc_offset = rel->r_offset - start_offset; |
| switch(type) { |
| case R_390_32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_390_16: |
| fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_390_8: |
| fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| default: |
| error("unsupported s390 relocation (%d)", type); |
| } |
| } |
| } |
| } |
| #elif defined(HOST_ALPHA) |
| { |
| for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
| if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) { |
| int type; |
| long reloc_offset; |
| |
| type = ELF64_R_TYPE(rel->r_info); |
| sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
| reloc_offset = rel->r_offset - start_offset; |
| switch (type) { |
| case R_ALPHA_GPDISP: |
| /* The gp is just 32 bit, and never changes, so it's easiest to emit it |
| as an immediate instead of constructing it from the pv or ra. */ |
| fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n", |
| reloc_offset); |
| fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n", |
| reloc_offset + (int)rel->r_addend); |
| break; |
| case R_ALPHA_LITUSE: |
| /* jsr to literal hint. Could be used to optimize to bsr. Ignore for |
| now, since some called functions (libc) need pv to be set up. */ |
| break; |
| case R_ALPHA_HINT: |
| /* Branch target prediction hint. Ignore for now. Should be already |
| correct for in-function jumps. */ |
| break; |
| case R_ALPHA_LITERAL: |
| /* Load a literal from the GOT relative to the gp. Since there's only a |
| single gp, nothing is to be done. */ |
| break; |
| case R_ALPHA_GPRELHIGH: |
| /* Handle fake relocations against __op_param symbol. Need to emit the |
| high part of the immediate value instead. Other symbols need no |
| special treatment. */ |
| if (strstart(sym_name, "__op_param", &p)) |
| fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n", |
| reloc_offset, p); |
| break; |
| case R_ALPHA_GPRELLOW: |
| if (strstart(sym_name, "__op_param", &p)) |
| fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n", |
| reloc_offset, p); |
| break; |
| case R_ALPHA_BRSGP: |
| /* PC-relative jump. Tweak offset to skip the two instructions that try to |
| set up the gp from the pv. */ |
| fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n", |
| reloc_offset, sym_name, reloc_offset); |
| break; |
| default: |
| error("unsupported Alpha relocation (%d)", type); |
| } |
| } |
| } |
| } |
| #elif defined(HOST_IA64) |
| { |
| unsigned long sym_idx; |
| long code_offset; |
| char name[256]; |
| int type; |
| long addend; |
| |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| sym_idx = ELF64_R_SYM(rel->r_info); |
| if (rel->r_offset < start_offset |
| || rel->r_offset >= start_offset + copy_size) |
| continue; |
| sym_name = (strtab + symtab[sym_idx].st_name); |
| code_offset = rel->r_offset - start_offset; |
| if (strstart(sym_name, "__op_jmp", &p)) { |
| int n; |
| n = strtol(p, NULL, 10); |
| /* __op_jmp relocations are done at |
| runtime to do translated block |
| chaining: the offset of the instruction |
| needs to be stored */ |
| fprintf(outfile, " jmp_offsets[%d] =" |
| "%ld + (gen_code_ptr - gen_code_buf);\n", |
| n, code_offset); |
| continue; |
| } |
| get_reloc_expr(name, sizeof(name), sym_name); |
| type = ELF64_R_TYPE(rel->r_info); |
| addend = rel->r_addend; |
| switch(type) { |
| case R_IA64_IMM64: |
| fprintf(outfile, |
| " ia64_imm64(gen_code_ptr + %ld, " |
| "%s + %ld);\n", |
| code_offset, name, addend); |
| break; |
| case R_IA64_LTOFF22X: |
| case R_IA64_LTOFF22: |
| fprintf(outfile, " IA64_LTOFF(gen_code_ptr + %ld," |
| " %s + %ld, %d);\n", |
| code_offset, name, addend, |
| (type == R_IA64_LTOFF22X)); |
| break; |
| case R_IA64_LDXMOV: |
| fprintf(outfile, |
| " ia64_ldxmov(gen_code_ptr + %ld," |
| " %s + %ld);\n", code_offset, name, addend); |
| break; |
| |
| case R_IA64_PCREL21B: |
| if (strstart(sym_name, "__op_gen_label", NULL)) { |
| fprintf(outfile, |
| " ia64_imm21b(gen_code_ptr + %ld," |
| " (long) (%s + %ld -\n\t\t" |
| "((long) gen_code_ptr + %ld)) >> 4);\n", |
| code_offset, name, addend, |
| code_offset & ~0xfUL); |
| } else { |
| fprintf(outfile, |
| " IA64_PLT(gen_code_ptr + %ld, " |
| "%d);\t/* %s + %ld */\n", |
| code_offset, |
| get_plt_index(sym_name, addend), |
| sym_name, addend); |
| } |
| break; |
| default: |
| error("unsupported ia64 relocation (0x%x)", |
| type); |
| } |
| } |
| fprintf(outfile, " ia64_nop_b(gen_code_ptr + %d);\n", |
| copy_size - 16 + 2); |
| } |
| #elif defined(HOST_SPARC) |
| { |
| char name[256]; |
| int type; |
| int addend; |
| int reloc_offset; |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| if (rel->r_offset >= start_offset && |
| rel->r_offset < start_offset + copy_size) { |
| sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name; |
| get_reloc_expr(name, sizeof(name), sym_name); |
| type = ELF32_R_TYPE(rel->r_info); |
| addend = rel->r_addend; |
| reloc_offset = rel->r_offset - start_offset; |
| switch(type) { |
| case R_SPARC_32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_SPARC_HI22: |
| fprintf(outfile, |
| " *(uint32_t *)(gen_code_ptr + %d) = " |
| "((*(uint32_t *)(gen_code_ptr + %d)) " |
| " & ~0x3fffff) " |
| " | (((%s + %d) >> 10) & 0x3fffff);\n", |
| reloc_offset, reloc_offset, name, addend); |
| break; |
| case R_SPARC_LO10: |
| fprintf(outfile, |
| " *(uint32_t *)(gen_code_ptr + %d) = " |
| "((*(uint32_t *)(gen_code_ptr + %d)) " |
| " & ~0x3ff) " |
| " | ((%s + %d) & 0x3ff);\n", |
| reloc_offset, reloc_offset, name, addend); |
| break; |
| case R_SPARC_WDISP30: |
| fprintf(outfile, |
| " *(uint32_t *)(gen_code_ptr + %d) = " |
| "((*(uint32_t *)(gen_code_ptr + %d)) " |
| " & ~0x3fffffff) " |
| " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) " |
| " & 0x3fffffff);\n", |
| reloc_offset, reloc_offset, name, addend, |
| reloc_offset); |
| break; |
| default: |
| error("unsupported sparc relocation (%d)", type); |
| } |
| } |
| } |
| } |
| #elif defined(HOST_SPARC64) |
| { |
| char name[256]; |
| int type; |
| int addend; |
| int reloc_offset; |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| if (rel->r_offset >= start_offset && |
| rel->r_offset < start_offset + copy_size) { |
| sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
| get_reloc_expr(name, sizeof(name), sym_name); |
| type = ELF64_R_TYPE(rel->r_info); |
| addend = rel->r_addend; |
| reloc_offset = rel->r_offset - start_offset; |
| switch(type) { |
| case R_SPARC_32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_SPARC_HI22: |
| fprintf(outfile, |
| " *(uint32_t *)(gen_code_ptr + %d) = " |
| "((*(uint32_t *)(gen_code_ptr + %d)) " |
| " & ~0x3fffff) " |
| " | (((%s + %d) >> 10) & 0x3fffff);\n", |
| reloc_offset, reloc_offset, name, addend); |
| break; |
| case R_SPARC_LO10: |
| fprintf(outfile, |
| " *(uint32_t *)(gen_code_ptr + %d) = " |
| "((*(uint32_t *)(gen_code_ptr + %d)) " |
| " & ~0x3ff) " |
| " | ((%s + %d) & 0x3ff);\n", |
| reloc_offset, reloc_offset, name, addend); |
| break; |
| case R_SPARC_WDISP30: |
| fprintf(outfile, |
| " *(uint32_t *)(gen_code_ptr + %d) = " |
| "((*(uint32_t *)(gen_code_ptr + %d)) " |
| " & ~0x3fffffff) " |
| " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) " |
| " & 0x3fffffff);\n", |
| reloc_offset, reloc_offset, name, addend, |
| reloc_offset); |
| break; |
| default: |
| error("unsupported sparc64 relocation (%d)", type); |
| } |
| } |
| } |
| } |
| #elif defined(HOST_ARM) |
| { |
| char name[256]; |
| int type; |
| int addend; |
| int reloc_offset; |
| |
| arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end, |
| relocs, nb_relocs); |
| |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| if (rel->r_offset >= start_offset && |
| rel->r_offset < start_offset + copy_size) { |
| sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| /* the compiler leave some unnecessary references to the code */ |
| if (sym_name[0] == '\0') |
| continue; |
| get_reloc_expr(name, sizeof(name), sym_name); |
| type = ELF32_R_TYPE(rel->r_info); |
| addend = get32((uint32_t *)(text + rel->r_offset)); |
| reloc_offset = rel->r_offset - start_offset; |
| switch(type) { |
| case R_ARM_ABS32: |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", |
| reloc_offset, name, addend); |
| break; |
| case R_ARM_PC24: |
| fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n", |
| reloc_offset, addend, name); |
| break; |
| default: |
| error("unsupported arm relocation (%d)", type); |
| } |
| } |
| } |
| } |
| #elif defined(HOST_M68K) |
| { |
| char name[256]; |
| int type; |
| int addend; |
| int reloc_offset; |
| Elf32_Sym *sym; |
| for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| if (rel->r_offset >= start_offset && |
| rel->r_offset < start_offset + copy_size) { |
| sym = &(symtab[ELFW(R_SYM)(rel->r_info)]); |
| sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| get_reloc_expr(name, sizeof(name), sym_name); |
| type = ELF32_R_TYPE(rel->r_info); |
| addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend; |
| reloc_offset = rel->r_offset - start_offset; |
| switch(type) { |
| case R_68K_32: |
| fprintf(outfile, " /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ; |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n", |
| reloc_offset, name, addend ); |
| break; |
| case R_68K_PC32: |
| fprintf(outfile, " /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset); |
| fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n", |
| reloc_offset, name, reloc_offset, /*sym->st_value+*/ addend); |
| break; |
| default: |
| error("unsupported m68k relocation (%d)", type); |
| } |
| } |
| } |
| } |
| #else |
| #error unsupported CPU |
| #endif |
| fprintf(outfile, " gen_code_ptr += %d;\n", copy_size); |
| fprintf(outfile, "}\n"); |
| fprintf(outfile, "break;\n\n"); |
| } else { |
| fprintf(outfile, "static inline void gen_%s(", name); |
| if (nb_args == 0) { |
| fprintf(outfile, "void"); |
| } else { |
| for(i = 0; i < nb_args; i++) { |
| if (i != 0) |
| fprintf(outfile, ", "); |
| fprintf(outfile, "long param%d", i + 1); |
| } |
| } |
| fprintf(outfile, ")\n"); |
| fprintf(outfile, "{\n"); |
| for(i = 0; i < nb_args; i++) { |
| fprintf(outfile, " *gen_opparam_ptr++ = param%d;\n", i + 1); |
| } |
| fprintf(outfile, " *gen_opc_ptr++ = INDEX_%s;\n", name); |
| fprintf(outfile, "}\n\n"); |
| } |
| } |
| |
| int gen_file(FILE *outfile, int out_type) |
| { |
| int i; |
| EXE_SYM *sym; |
| |
| if (out_type == OUT_INDEX_OP) { |
| fprintf(outfile, "DEF(end, 0, 0)\n"); |
| fprintf(outfile, "DEF(nop, 0, 0)\n"); |
| fprintf(outfile, "DEF(nop1, 1, 0)\n"); |
| fprintf(outfile, "DEF(nop2, 2, 0)\n"); |
| fprintf(outfile, "DEF(nop3, 3, 0)\n"); |
| for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| const char *name; |
| name = get_sym_name(sym); |
| if (strstart(name, OP_PREFIX, NULL)) { |
| gen_code(name, sym->st_value, sym->st_size, outfile, 2); |
| } |
| } |
| } else if (out_type == OUT_GEN_OP) { |
| /* generate gen_xxx functions */ |
| fprintf(outfile, "#include \"dyngen-op.h\"\n"); |
| for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| const char *name; |
| name = get_sym_name(sym); |
| if (strstart(name, OP_PREFIX, NULL)) { |
| #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF) |
| if (sym->st_shndx != text_shndx) |
| error("invalid section for opcode (0x%x)", sym->st_shndx); |
| #endif |
| gen_code(name, sym->st_value, sym->st_size, outfile, 0); |
| } |
| } |
| |
| } else { |
| /* generate big code generation switch */ |
| fprintf(outfile, |
| "int dyngen_code(uint8_t *gen_code_buf,\n" |
| " uint16_t *label_offsets, uint16_t *jmp_offsets,\n" |
| " const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels)\n" |
| "{\n" |
| " uint8_t *gen_code_ptr;\n" |
| " const uint16_t *opc_ptr;\n" |
| " const uint32_t *opparam_ptr;\n"); |
| |
| #ifdef HOST_ARM |
| fprintf(outfile, |
| " uint8_t *last_gen_code_ptr = gen_code_buf;\n" |
| " LDREntry *arm_ldr_ptr = arm_ldr_table;\n" |
| " uint32_t *arm_data_ptr = arm_data_table;\n"); |
| #endif |
| #ifdef HOST_IA64 |
| { |
| long addend, not_first = 0; |
| unsigned long sym_idx; |
| int index, max_index; |
| const char *sym_name; |
| EXE_RELOC *rel; |
| |
| max_index = -1; |
| for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| sym_idx = ELF64_R_SYM(rel->r_info); |
| sym_name = (strtab + symtab[sym_idx].st_name); |
| if (strstart(sym_name, "__op_gen_label", NULL)) |
| continue; |
| if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B) |
| continue; |
| |
| addend = rel->r_addend; |
| index = get_plt_index(sym_name, addend); |
| if (index <= max_index) |
| continue; |
| max_index = index; |
| fprintf(outfile, " extern void %s(void);\n", sym_name); |
| } |
| |
| fprintf(outfile, |
| " struct ia64_fixup *plt_fixes = NULL, " |
| "*ltoff_fixes = NULL;\n" |
| " static long plt_target[] = {\n\t"); |
| |
| max_index = -1; |
| for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| sym_idx = ELF64_R_SYM(rel->r_info); |
| sym_name = (strtab + symtab[sym_idx].st_name); |
| if (strstart(sym_name, "__op_gen_label", NULL)) |
| continue; |
| if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B) |
| continue; |
| |
| addend = rel->r_addend; |
| index = get_plt_index(sym_name, addend); |
| if (index <= max_index) |
| continue; |
| max_index = index; |
| |
| if (not_first) |
| fprintf(outfile, ",\n\t"); |
| not_first = 1; |
| if (addend) |
| fprintf(outfile, "(long) &%s + %ld", sym_name, addend); |
| else |
| fprintf(outfile, "(long) &%s", sym_name); |
| } |
| fprintf(outfile, "\n };\n" |
| " unsigned int plt_offset[%u] = { 0 };\n", max_index + 1); |
| } |
| #endif |
| |
| fprintf(outfile, |
| "\n" |
| " gen_code_ptr = gen_code_buf;\n" |
| " opc_ptr = opc_buf;\n" |
| " opparam_ptr = opparam_buf;\n"); |
| |
| /* Generate prologue, if needed. */ |
| |
| fprintf(outfile, |
| " for(;;) {\n" |
| " switch(*opc_ptr++) {\n" |
| ); |
| |
| for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| const char *name; |
| name = get_sym_name(sym); |
| if (strstart(name, OP_PREFIX, NULL)) { |
| #if 0 |
| printf("%4d: %s pos=0x%08x len=%d\n", |
| i, name, sym->st_value, sym->st_size); |
| #endif |
| #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF) |
| if (sym->st_shndx != text_shndx) |
| error("invalid section for opcode (0x%x)", sym->st_shndx); |
| #endif |
| gen_code(name, sym->st_value, sym->st_size, outfile, 1); |
| } |
| } |
| |
| fprintf(outfile, |
| " case INDEX_op_nop:\n" |
| " break;\n" |
| " case INDEX_op_nop1:\n" |
| " opparam_ptr++;\n" |
| " break;\n" |
| " case INDEX_op_nop2:\n" |
| " opparam_ptr += 2;\n" |
| " break;\n" |
| " case INDEX_op_nop3:\n" |
| " opparam_ptr += 3;\n" |
| " break;\n" |
| " default:\n" |
| " goto the_end;\n" |
| " }\n"); |
| |
| #ifdef HOST_ARM |
| /* generate constant table if needed */ |
| fprintf(outfile, |
| " if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n" |
| " gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n" |
| " last_gen_code_ptr = gen_code_ptr;\n" |
| " arm_ldr_ptr = arm_ldr_table;\n" |
| " arm_data_ptr = arm_data_table;\n" |
| " }\n"); |
| #endif |
| |
| |
| fprintf(outfile, |
| " }\n" |
| " the_end:\n" |
| ); |
| #ifdef HOST_IA64 |
| fprintf(outfile, |
| " {\n" |
| " extern char code_gen_buffer[];\n" |
| " ia64_apply_fixes(&gen_code_ptr, ltoff_fixes, " |
| "(uint64_t) code_gen_buffer + 2*(1<<20), plt_fixes,\n\t\t\t" |
| "sizeof(plt_target)/sizeof(plt_target[0]),\n\t\t\t" |
| "plt_target, plt_offset);\n }\n"); |
| #endif |
| |
| /* generate some code patching */ |
| #ifdef HOST_ARM |
| 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"); |
| #endif |
| /* flush instruction cache */ |
| fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n"); |
| |
| fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n"); |
| fprintf(outfile, "}\n\n"); |
| |
| } |
| |
| return 0; |
| } |
| |
| void usage(void) |
| { |
| printf("dyngen (c) 2003 Fabrice Bellard\n" |
| "usage: dyngen [-o outfile] [-c] objfile\n" |
| "Generate a dynamic code generator from an object file\n" |
| "-c output enum of operations\n" |
| "-g output gen_op_xx() functions\n" |
| ); |
| exit(1); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int c, out_type; |
| const char *filename, *outfilename; |
| FILE *outfile; |
| |
| outfilename = "out.c"; |
| out_type = OUT_CODE; |
| for(;;) { |
| c = getopt(argc, argv, "ho:cg"); |
| if (c == -1) |
| break; |
| switch(c) { |
| case 'h': |
| usage(); |
| break; |
| case 'o': |
| outfilename = optarg; |
| break; |
| case 'c': |
| out_type = OUT_INDEX_OP; |
| break; |
| case 'g': |
| out_type = OUT_GEN_OP; |
| break; |
| } |
| } |
| if (optind >= argc) |
| usage(); |
| filename = argv[optind]; |
| outfile = fopen(outfilename, "w"); |
| if (!outfile) |
| error("could not open '%s'", outfilename); |
| |
| load_object(filename); |
| gen_file(outfile, out_type); |
| fclose(outfile); |
| return 0; |
| } |
