aboutsummaryrefslogtreecommitdiffstats
path: root/dyngen.c
diff options
context:
space:
mode:
Diffstat (limited to 'dyngen.c')
-rw-r--r--dyngen.c3542
1 files changed, 0 insertions, 3542 deletions
diff --git a/dyngen.c b/dyngen.c
deleted file mode 100644
index 7425624..0000000
--- a/dyngen.c
+++ /dev/null
@@ -1,3542 +0,0 @@
-/*
- * 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"
-
-//#define DEBUG_OP
-
-/* 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>
-
-#ifdef HOST_PPC
-
-#define MACH_CPU_TYPE CPU_TYPE_POWERPC
-#define mach_check_cputype(x) ((x) == CPU_TYPE_POWERPC)
-
-#elif defined(HOST_I386)
-
-#define MACH_CPU_TYPE CPU_TYPE_I386
-#define mach_check_cputype(x) ((x) == CPU_TYPE_I386)
-
-#else
-#error unsupported CPU - please update the code
-#endif
-
-# 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("file %s: unsupported ELF class", filename);
- if (ehdr.e_type != ET_REL)
- error("file %s: ELF object file expected", filename);
- if (ehdr.e_version != EV_CURRENT)
- error("file %s: invalid ELF version", filename);
- if (!elf_check_arch(ehdr.e_machine))
- error("file %s: unsupported CPU (e_machine=%d)", filename, 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 = (char*) 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 = (char*) 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 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;
- int section_type;
-
- /* Sanity check */
- if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
- return (char*)0;
-
- section_type = sec_hdr->flags & SECTION_TYPE;
- if( section_type == S_SYMBOL_STUBS ){
- size = sec_hdr->reserved2;
- if(size == 0)
- error("size = 0");
- }
- else if( section_type == S_LAZY_SYMBOL_POINTERS ||
- section_type == S_NON_LAZY_SYMBOL_POINTERS)
- size = sizeof(unsigned long);
- else
- return NULL;
-
- /* 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, &section_hdr[i]);
- if((long)name != 0)
- return name;
- }
- return 0;
-}
-
-/* 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 ) {
- /* look in indirect symbols if not found */
- struct section* sec_hdr = &section_hdr[sectnum-1];
- int section_type = sec_hdr->flags & SECTION_TYPE;
-
- if (section_type == S_NON_LAZY_SYMBOL_POINTERS)
- {
- int tocindex = (int)(value - sec_hdr->addr)/sizeof(long);
- int symindex = tocdylib[sec_hdr->reserved1 + tocindex];
- const char* name = get_sym_name(&symtab[symindex]);
- *offset = 0;
- return name;
- }
- error("no symbol match for value=0x%04x in section %d with flags %02x", value, sectnum, sec_hdr->flags);
- return NULL;
- } else {
- *offset = value - symtab[ret].st_value;
- return get_sym_name(&symtab[ret]);
- }
-}
-
-
-static int is_reloc_non_lazy(EXE_RELOC* rel)
-{
- return ( rel->r_symbolnum >= 1 && rel->r_symbolnum <= segment->nsects &&
- (section_hdr[rel->r_symbolnum-1].flags & SECTION_TYPE) == S_NON_LAZY_SYMBOL_POINTERS );
-}
-
-
-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) {
- char *name = (char *)find_reloc_name_given_its_address(sca_rel->r_value);
-
- /* search it in the full symbol list, if not found */
- if (!name) {
- int i;
- for (i = 0; i < nb_syms; i++) {
- EXE_SYM *sym = &symtab[i];
- if (sym->st_value == sca_rel->r_value) {
- name = get_sym_name(sym);
- switch (sca_rel->r_type) {
- case GENERIC_RELOC_VANILLA:
- *sslide = *(uint32_t *)(text + sca_rel->r_address) - sca_rel->r_value;
- break;
- }
- break;
- }
- }
- }
- return name;
- }
-
- 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;
- case GENERIC_RELOC_VANILLA:
- sectoffset = *(uint32_t *)(text + rel->r_address);
- break;
- default:
- error("switch(rel->type=%d) not found", rel->r_type);
- }
-
- if(rel->r_pcrel) {
- sectoffset += rel->r_address;
-#ifdef HOST_I386
- sectoffset += (1 << rel->r_length);
-#endif
- }
-
- if (rel->r_type == PPC_RELOC_BR24 || rel->r_pcrel)
- name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, &section_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_check_cputype(mach_hdr.cputype))
- 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
-
-
-#if defined(HOST_I386) || defined(HOST_X86_64)
-
-/* This byte is the first byte of an instruction. */
-#define FLAG_INSN (1 << 0)
-/* This byte has been processed as part of an instruction. */
-#define FLAG_SCANNED (1 << 1)
-/* This instruction is a return instruction. Gcc cometimes generates prefix
- bytes, so may be more than one byte long. */
-#define FLAG_RET (1 << 2)
-/* This is either the target of a jump, or the preceeding instruction uses
- a pc-relative offset. */
-#define FLAG_TARGET (1 << 3)
-/* This is a magic instruction that needs fixing up. */
-#define FLAG_EXIT (1 << 4)
-#define MAX_EXITS 5
-
-static void
-bad_opcode(const char *name, uint32_t op)
-{
- error("Unsupported opcode %0*x in %s", (op > 0xff) ? 4 : 2, op, name);
-}
-
-/* Mark len bytes as scanned, Returns insn_size + len. Reports an error
- if these bytes have already been scanned. */
-static int
-eat_bytes(const char *name, char *flags, int insn, int insn_size, int len)
-{
- while (len > 0) {
- /* This should never occur in sane code. */
- if (flags[insn + insn_size] & FLAG_SCANNED)
- error ("Overlapping instructions in %s", name);
- flags[insn + insn_size] |= FLAG_SCANNED;
- insn_size++;
- len--;
- }
- return insn_size;
-}
-
-static void
-trace_i386_insn (const char *name, uint8_t *start_p, char *flags, int insn,
- int len)
-{
- uint8_t *ptr;
- uint8_t op;
- int modrm;
- int is_prefix;
- int op_size;
- int addr_size;
- int insn_size;
- int is_ret;
- int is_condjmp;
- int is_jmp;
- int is_exit;
- int is_pcrel;
- int immed;
- int seen_rexw;
- int32_t disp;
-
- ptr = start_p + insn;
- /* nonzero if this insn has a ModR/M byte. */
- modrm = 1;
- /* The size of the immediate value in this instruction. */
- immed = 0;
- /* The operand size. */
- op_size = 4;
- /* The address size */
- addr_size = 4;
- /* The total length of this instruction. */
- insn_size = 0;
- is_prefix = 1;
- is_ret = 0;
- is_condjmp = 0;
- is_jmp = 0;
- is_exit = 0;
- seen_rexw = 0;
- is_pcrel = 0;
-
- while (is_prefix) {
- op = ptr[insn_size];
- insn_size = eat_bytes(name, flags, insn, insn_size, 1);
- is_prefix = 0;
- switch (op >> 4) {
- case 0:
- case 1:
- case 2:
- case 3:
- if (op == 0x0f) {
- /* two-byte opcode. */
- op = ptr[insn_size];
- insn_size = eat_bytes(name, flags, insn, insn_size, 1);
- switch (op >> 4) {
- case 0:
- if ((op & 0xf) > 3)
- modrm = 0;
- break;
- case 1: /* vector move or prefetch */
- case 2: /* various moves and vector compares. */
- case 4: /* cmov */
- case 5: /* vector instructions */
- case 6:
- case 13:
- case 14:
- case 15:
- break;
- case 7: /* mmx */
- if (op & 0x77) /* emms */
- modrm = 0;
- break;
- case 3: /* wrmsr, rdtsc, rdmsr, rdpmc, sysenter, sysexit */
- modrm = 0;
- break;
- case 8: /* long conditional jump */
- is_condjmp = 1;
- immed = op_size;
- modrm = 0;
- break;
- case 9: /* setcc */
- break;
- case 10:
- switch (op & 0x7) {
- case 0: /* push fs/gs */
- case 1: /* pop fs/gs */
- case 2: /* cpuid/rsm */
- modrm = 0;
- break;
- case 4: /* shld/shrd immediate */
- immed = 1;
- break;
- default: /* Normal instructions with a ModR/M byte. */
- break;
- }
- break;
- case 11:
- switch (op & 0xf) {
- case 10: /* bt, bts, btr, btc */
- immed = 1;
- break;
- default:
- /* cmpxchg, lss, btr, lfs, lgs, movzx, btc, bsf, bsr
- undefined, and movsx */
- break;
- }
- break;
- case 12:
- if (op & 8) {
- /* bswap */
- modrm = 0;
- } else {
- switch (op & 0x7) {
- case 2:
- case 4:
- case 5:
- case 6:
- immed = 1;
- break;
- default:
- break;
- }
- }
- break;
- }
- } else if ((op & 0x07) <= 0x3) {
- /* General arithmentic ax. */
- } else if ((op & 0x07) <= 0x5) {
- /* General arithmetic ax, immediate. */
- if (op & 0x01)
- immed = op_size;
- else
- immed = 1;
- modrm = 0;
- } else if ((op & 0x23) == 0x22) {
- /* Segment prefix. */
- is_prefix = 1;
- } else {
- /* Segment register push/pop or DAA/AAA/DAS/AAS. */
- modrm = 0;
- }
- break;
-
-#if defined(HOST_X86_64)
- case 4: /* rex prefix. */
- is_prefix = 1;
- /* The address/operand size is actually 64-bit, but the immediate
- values in the instruction are still 32-bit. */
- op_size = 4;
- addr_size = 4;
- if (op & 8)
- seen_rexw = 1;
- break;
-#else
- case 4: /* inc/dec register. */
-#endif
- case 5: /* push/pop general register. */
- modrm = 0;
- break;
-
- case 6:
- switch (op & 0x0f) {
- case 0: /* pusha */
- case 1: /* popa */
- modrm = 0;
- break;
- case 2: /* bound */
- case 3: /* arpl */
- break;
- case 4: /* FS */
- case 5: /* GS */
- is_prefix = 1;
- break;
- case 6: /* opcode size prefix. */
- op_size = 2;
- is_prefix = 1;
- break;
- case 7: /* Address size prefix. */
- addr_size = 2;
- is_prefix = 1;
- break;
- case 8: /* push immediate */
- immed = op_size;
- modrm = 0;
- break;
- case 10: /* push 8-bit immediate */
- immed = 1;
- modrm = 0;
- break;
- case 9: /* imul immediate */
- immed = op_size;
- break;
- case 11: /* imul 8-bit immediate */
- immed = 1;
- break;
- case 12: /* insb */
- case 13: /* insw */
- case 14: /* outsb */
- case 15: /* outsw */
- modrm = 0;
- break;
- }
- break;
-
- case 7: /* Short conditional jump. */
- is_condjmp = 1;
- immed = 1;
- modrm = 0;
- break;
-
- case 8:
- if ((op & 0xf) <= 3) {
- /* arithmetic immediate. */
- if ((op & 3) == 1)
- immed = op_size;
- else
- immed = 1;
- }
- /* else test, xchg, mov, lea or pop general. */
- break;
-
- case 9:
- /* Various single-byte opcodes with no modrm byte. */
- modrm = 0;
- if (op == 10) {
- /* Call */
- immed = 4;
- }
- break;
-
- case 10:
- switch ((op & 0xe) >> 1) {
- case 0: /* mov absoliute immediate. */
- case 1:
- if (seen_rexw)
- immed = 8;
- else
- immed = addr_size;
- break;
- case 4: /* test immediate. */
- if (op & 1)
- immed = op_size;
- else
- immed = 1;
- break;
- default: /* Various string ops. */
- break;
- }
- modrm = 0;
- break;
-
- case 11: /* move immediate to register */
- if (op & 8) {
- if (seen_rexw)
- immed = 8;
- else
- immed = op_size;
- } else {
- immed = 1;
- }
- modrm = 0;
- break;
-
- case 12:
- switch (op & 0xf) {
- case 0: /* shift immediate */
- case 1:
- immed = 1;
- break;
- case 2: /* ret immediate */
- immed = 2;
- modrm = 0;
- bad_opcode(name, op);
- break;
- case 3: /* ret */
- modrm = 0;
- is_ret = 1;
- case 4: /* les */
- case 5: /* lds */
- break;
- case 6: /* mov immediate byte */
- immed = 1;
- break;
- case 7: /* mov immediate */
- immed = op_size;
- break;
- case 8: /* enter */
- /* TODO: Is this right? */
- immed = 3;
- modrm = 0;
- break;
- case 10: /* retf immediate */
- immed = 2;
- modrm = 0;
- bad_opcode(name, op);
- break;
- case 13: /* int */
- immed = 1;
- modrm = 0;
- break;
- case 11: /* retf */
- case 15: /* iret */
- modrm = 0;
- bad_opcode(name, op);
- break;
- default: /* leave, int3 or into */
- modrm = 0;
- break;
- }
- break;
-
- case 13:
- if ((op & 0xf) >= 8) {
- /* Coprocessor escape. For our purposes this is just a normal
- instruction with a ModR/M byte. */
- } else if ((op & 0xf) >= 4) {
- /* AAM, AAD or XLAT */
- modrm = 0;
- }
- /* else shift instruction */
- break;
-
- case 14:
- switch ((op & 0xc) >> 2) {
- case 0: /* loop or jcxz */
- is_condjmp = 1;
- immed = 1;
- break;
- case 1: /* in/out immed */
- immed = 1;
- break;
- case 2: /* call or jmp */
- switch (op & 3) {
- case 0: /* call */
- immed = op_size;
- break;
- case 1: /* long jump */
- immed = 4;
- is_jmp = 1;
- break;
- case 2: /* far jmp */
- bad_opcode(name, op);
- break;
- case 3: /* short jmp */
- immed = 1;
- is_jmp = 1;
- break;
- }
- break;
- case 3: /* in/out register */
- break;
- }
- modrm = 0;
- break;
-
- case 15:
- switch ((op & 0xe) >> 1) {
- case 0:
- case 1:
- is_prefix = 1;
- break;
- case 2:
- case 4:
- case 5:
- case 6:
- modrm = 0;
- /* Some privileged insns are used as markers. */
- switch (op) {
- case 0xf4: /* hlt: Exit translation block. */
- is_exit = 1;
- break;
- case 0xfa: /* cli: Jump to label. */
- is_exit = 1;
- immed = 4;
- break;
- case 0xfb: /* sti: TB patch jump. */
- /* Mark the insn for patching, but continue sscanning. */
- flags[insn] |= FLAG_EXIT;
- immed = 4;
- break;
- }
- break;
- case 3: /* unary grp3 */
- if ((ptr[insn_size] & 0x38) == 0) {
- if (op == 0xf7)
- immed = op_size;
- else
- immed = 1; /* test immediate */
- }
- break;
- case 7: /* inc/dec grp4/5 */
- /* TODO: This includes indirect jumps. We should fail if we
- encounter one of these. */
- break;
- }
- break;
- }
- }
-
- if (modrm) {
- if (addr_size != 4)
- error("16-bit addressing mode used in %s", name);
-
- disp = 0;
- modrm = ptr[insn_size];
- insn_size = eat_bytes(name, flags, insn, insn_size, 1);
- modrm &= 0xc7;
- switch ((modrm & 0xc0) >> 6) {
- case 0:
- if (modrm == 5)
- disp = 4;
- break;
- case 1:
- disp = 1;
- break;
- case 2:
- disp = 4;
- break;
- }
- if ((modrm & 0xc0) != 0xc0 && (modrm & 0x7) == 4) {
- /* SIB byte */
- if (modrm == 4 && (ptr[insn_size] & 0x7) == 5) {
- disp = 4;
- is_pcrel = 1;
- }
- insn_size = eat_bytes(name, flags, insn, insn_size, 1);
- }
- insn_size = eat_bytes(name, flags, insn, insn_size, disp);
- }
- insn_size = eat_bytes(name, flags, insn, insn_size, immed);
- if (is_condjmp || is_jmp) {
- if (immed == 1) {
- disp = (int8_t)*(ptr + insn_size - 1);
- } else {
- disp = (((int32_t)*(ptr + insn_size - 1)) << 24)
- | (((int32_t)*(ptr + insn_size - 2)) << 16)
- | (((int32_t)*(ptr + insn_size - 3)) << 8)
- | *(ptr + insn_size - 4);
- }
- disp += insn_size;
- /* Jumps to external symbols point to the address of the offset
- before relocation. */
- /* ??? These are probably a tailcall. We could fix them up by
- replacing them with jmp to EOB + call, but it's easier to just
- prevent the compiler generating them. */
- if (disp == 1)
- error("Unconditional jump (sibcall?) in %s", name);
- disp += insn;
- if (disp < 0 || disp > len)
- error("Jump outside instruction in %s", name);
-
- if ((flags[disp] & (FLAG_INSN | FLAG_SCANNED)) == FLAG_SCANNED)
- error("Overlapping instructions in %s", name);
-
- flags[disp] |= (FLAG_INSN | FLAG_TARGET);
- is_pcrel = 1;
- }
- if (is_pcrel) {
- /* Mark the following insn as a jump target. This will stop
- this instruction being moved. */
- flags[insn + insn_size] |= FLAG_TARGET;
- }
- if (is_ret)
- flags[insn] |= FLAG_RET;
-
- if (is_exit)
- flags[insn] |= FLAG_EXIT;
-
- if (!(is_jmp || is_ret || is_exit))
- flags[insn + insn_size] |= FLAG_INSN;
-}
-
-/* Scan a function body. Returns the position of the return sequence.
- Sets *patch_bytes to the number of bytes that need to be copied from that
- location. If no patching is required (ie. the return is the last insn)
- *patch_bytes will be set to -1. *plen is the number of code bytes to copy.
- */
-static int trace_i386_op(const char * name, uint8_t *start_p, int *plen,
- int *patch_bytes, int *exit_addrs)
-{
- char *flags;
- int more;
- int insn;
- int retpos;
- int bytes;
- int num_exits;
- int len;
- int last_insn;
-
- len = *plen;
- flags = malloc(len + 1);
- memset(flags, 0, len + 1);
- flags[0] |= FLAG_INSN;
- more = 1;
- while (more) {
- more = 0;
- for (insn = 0; insn < len; insn++) {
- if ((flags[insn] & (FLAG_INSN | FLAG_SCANNED)) == FLAG_INSN) {
- trace_i386_insn(name, start_p, flags, insn, len);
- more = 1;
- }
- }
- }
-
- /* Strip any unused code at the end of the function. */
- while (len > 0 && flags[len - 1] == 0)
- len--;
-
- retpos = -1;
- num_exits = 0;
- last_insn = 0;
- for (insn = 0; insn < len; insn++) {
- if (flags[insn] & FLAG_RET) {
- /* ??? In theory it should be possible to handle multiple return
- points. In practice it's not worth the effort. */
- if (retpos != -1)
- error("Multiple return instructions in %s", name);
- retpos = insn;
- }
- if (flags[insn] & FLAG_EXIT) {
- if (num_exits == MAX_EXITS)
- error("Too many block exits in %s", name);
- exit_addrs[num_exits] = insn;
- num_exits++;
- }
- if (flags[insn] & FLAG_INSN)
- last_insn = insn;
- }
-
- exit_addrs[num_exits] = -1;
- if (retpos == -1) {
- if (num_exits == 0) {
- error ("No return instruction found in %s", name);
- } else {
- retpos = len;
- last_insn = len;
- }
- }
-
- /* If the return instruction is the last instruction we can just
- remove it. */
- if (retpos == last_insn)
- *patch_bytes = -1;
- else
- *patch_bytes = 0;
-
- /* Back up over any nop instructions. */
- while (retpos > 0
- && (flags[retpos] & FLAG_TARGET) == 0
- && (flags[retpos - 1] & FLAG_INSN) != 0
- && start_p[retpos - 1] == 0x90) {
- retpos--;
- }
-
- if (*patch_bytes == -1) {
- *plen = retpos;
- free (flags);
- return retpos;
- }
- *plen = len;
-
- /* The ret is in the middle of the function. Find four more bytes that
- so the ret can be replaced by a jmp. */
- /* ??? Use a short jump where possible. */
- bytes = 4;
- insn = retpos + 1;
- /* We can clobber everything up to the next jump target. */
- while (insn < len && bytes > 0 && (flags[insn] & FLAG_TARGET) == 0) {
- insn++;
- bytes--;
- }
- if (bytes > 0) {
- /* ???: Strip out nop blocks. */
- /* We can't do the replacement without clobbering anything important.
- Copy preceeding instructions(s) to give us some space. */
- while (retpos > 0) {
- /* If this byte is the target of a jmp we can't move it. */
- if (flags[retpos] & FLAG_TARGET)
- break;
-
- (*patch_bytes)++;
- bytes--;
- retpos--;
-
- /* Break out of the loop if we have enough space and this is either
- the first byte of an instruction or a pad byte. */
- if ((flags[retpos] & (FLAG_INSN | FLAG_SCANNED)) != FLAG_SCANNED
- && bytes <= 0) {
- break;
- }
- }
- }
-
- if (bytes > 0)
- error("Unable to replace ret with jmp in %s\n", name);
-
- free(flags);
- return retpos;
-}
-
-#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;
-
-#if defined(CONFIG_FORMAT_MACH)
- typedef struct { const char* name; int nonlazy; } SymRef;
- int num_symrefs = 0;
- int max_symrefs = 0;
- SymRef* symrefs = NULL;
-#endif
-
-#if defined(HOST_I386) || defined(HOST_X86_64)
- int patch_bytes;
- int retpos;
- int exit_addrs[MAX_EXITS];
-#endif
-
- /* 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)
- {
- int len;
- len = p_end - p_start;
- retpos = trace_i386_op(name, p_start, &len, &patch_bytes, exit_addrs);
- copy_size = len;
- }
-#elif defined(HOST_PPC)
- {
- uint8_t *p;
- p = (void *)(p_end - 4);
- while (p > p_start && get32((uint32_t*)p) == 0x60000000) {
- p_end = p;
- p -= 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)
- {
-#define INSN_SAVE 0x9de3a000
-#define INSN_RET 0x81c7e008
-#define INSN_RESTORE 0x81e80000
-#define INSN_RETURN 0x81cfe008
-#define INSN_NOP 0x01000000
-
- 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) == INSN_SAVE) {
- 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 == INSN_RET && end_insn2 == INSN_RESTORE)
- /* SPARC v7: ret; restore; */ ;
- else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP)
- /* SPARC v9: return; nop; */ ;
- else
- 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 == INSN_NOP)
- 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) {
-#if defined(HOST_I386) || defined(HOST_X86_64)
- if (patch_bytes != -1)
- copy_size += patch_bytes;
-#ifdef DEBUG_OP
- copy_size += 2;
-#endif
-#endif
- 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 1
- fprintf(outfile, " static const unsigned char %s[%d] = {\n", name, copy_size);
- {
- uint8_t* code = p_start + (start_offset - offset);
- int nn;
- const char* comma = " ";
-
- for (nn = 0; nn < copy_size; nn++) {
- fprintf(outfile, "%s0x%02x", comma, code[nn]);
- comma = ", ";
- if (((nn+1) & 15) == 0)
- comma = ",\n ";
- }
- offset = start_offset;
- }
- fprintf(outfile, "\n };\n" );
-#else /* 0 */
-#if defined(HOST_IA64)
- fprintf(outfile, " extern char %s;\n", name);
-#else
- fprintf(outfile, " extern void %s();\n", name);
-#endif
-#endif /* 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 (*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;
- }
-#elif defined(CONFIG_FORMAT_MACH)
- {
- int nn;
-
- for (nn = 0; nn < num_symrefs; nn++)
- if ( !strcmp(sym_name, symrefs[nn].name) )
- break;
-
- if (nn >= num_symrefs)
- {
- if (num_symrefs >= max_symrefs) {
- int new_max = max_symrefs + 16;
- SymRef* new_refs = realloc( symrefs, new_max*sizeof(SymRef) );
- symrefs = new_refs;
- max_symrefs = new_max;
- }
-
- symrefs[nn].name = sym_name;
- symrefs[nn].nonlazy = 0;
-
- fprintf(outfile, " extern char %s __attribute__((unused));\n", sym_name);
- num_symrefs++;
- }
-
- if ( !symrefs[nn].nonlazy && is_reloc_non_lazy(rel) ) {
- symrefs[nn].nonlazy = 1;
- fprintf(outfile, " static const void* __to_%s = &%s;\n", sym_name, 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)
- {
-#ifdef 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);
-
- if (length != 2)
- error("unsupported %d-bit relocation", 8 * (1 << length));
-
- switch (type) {
- case GENERIC_RELOC_VANILLA:
- if (pcrel || strstart(sym_name,"__op_gen_label",&p)) {
- fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) - 4;\n",
- slide, final_sym_name, slide);
- }
- else {
- if ( is_reloc_non_lazy(rel) )
- fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)(void*)&__to_%s;\n", slide, sym_name);
- else
- fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (%s + %d);\n",
- slide, final_sym_name, sslide);
- }
- break;
- default:
- error("unsupported i386 relocation (%d)", type);
- }
- }
-#else
- 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
- }
- }
-#endif
- /* Replace the marker instructions with the actual opcodes. */
- for (i = 0; exit_addrs[i] != -1; i++) {
- int op;
- switch (p_start[exit_addrs[i]])
- {
- case 0xf4: op = 0xc3; break; /* hlt -> ret */
- case 0xfa: op = 0xe9; break; /* cli -> jmp */
- case 0xfb: op = 0xe9; break; /* sti -> jmp */
- default: error("Internal error");
- }
- fprintf(outfile,
- " *(uint8_t *)(gen_code_ptr + %d) = 0x%x;\n",
- exit_addrs[i], op);
- }
- /* Fix up the return instruction. */
- if (patch_bytes != -1) {
- if (patch_bytes) {
- fprintf(outfile, " memcpy(gen_code_ptr + %d,"
- "gen_code_ptr + %d, %d);\n",
- copy_size, retpos, patch_bytes);
- }
- fprintf(outfile,
- " *(uint8_t *)(gen_code_ptr + %d) = 0xe9;\n",
- retpos);
- fprintf(outfile,
- " *(uint32_t *)(gen_code_ptr + %d) = 0x%x;\n",
- retpos + 1, copy_size - (retpos + 5));
-
- copy_size += patch_bytes;
- }
-#ifdef DEBUG_OP
- fprintf(outfile,
- " *(uint16_t *)(gen_code_ptr + %d) = 0x9090;\n",
- copy_size);
- copy_size += 2;
-#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);
- }
- }
- }
- /* Replace the marker instructions with the actual opcodes. */
- for (i = 0; exit_addrs[i] != -1; i++) {
- int op;
- switch (p_start[exit_addrs[i]])
- {
- case 0xf4: op = 0xc3; break; /* hlt -> ret */
- case 0xfa: op = 0xe9; break; /* cli -> jmp */
- case 0xfb: op = 0xe9; break; /* sti -> jmp */
- default: error("Internal error");
- }
- fprintf(outfile,
- " *(uint8_t *)(gen_code_ptr + %d) = 0x%x;\n",
- exit_addrs[i], op);
- }
- /* Fix up the return instruction. */
- if (patch_bytes != -1) {
- if (patch_bytes) {
- fprintf(outfile, " memcpy(gen_code_ptr + %d,"
- "gen_code_ptr + %d, %d);\n",
- copy_size, retpos, patch_bytes);
- }
- fprintf(outfile,
- " *(uint8_t *)(gen_code_ptr + %d) = 0xe9;\n",
- retpos);
- fprintf(outfile,
- " *(uint32_t *)(gen_code_ptr + %d) = 0x%x;\n",
- retpos + 1, copy_size - (retpos + 5));
-
- copy_size += patch_bytes;
- }
-#ifdef DEBUG_OP
- fprintf(outfile,
- " *(uint16_t *)(gen_code_ptr + %d) = 0x9090;\n",
- copy_size);
- copy_size += 2;
-#endif
- }
-#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) & %s;\n", get_rel_sym_name(rel));
- fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((imm - ((uint32_t)gen_code_ptr + %d)) & 0x03fffffc);\n",
- slide, slide, slide );
- 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:
- if ( is_reloc_non_lazy(rel) )
- fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = ((uint32_t)(void*)&__to_%s + %d) >> 16;\n",
- slide, sym_name, sslide);
- else
- fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
- slide, final_sym_name, sslide);
- break;
- case PPC_RELOC_LO16:
- if ( is_reloc_non_lazy(rel) )
- fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = ((uint32_t)(void*)&__to_%s + %d);\n",
- slide, sym_name, sslide);
- else
- fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
- slide, final_sym_name, sslide);
- break;
- case PPC_RELOC_HA16:
- if ( is_reloc_non_lazy(rel) )
- fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = ((uint32_t)(void*)&__to_%s + %d + 0x8000) >> 16;\n",
- slide, sym_name, sslide);
- else
- 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;
- case R_SPARC_WDISP22:
- fprintf(outfile,
- " *(uint32_t *)(gen_code_ptr + %d) = "
- "((*(uint32_t *)(gen_code_ptr + %d)) "
- " & ~0x3fffff) "
- " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
- " & 0x3fffff);\n",
- rel->r_offset - start_offset,
- rel->r_offset - start_offset,
- name, addend,
- rel->r_offset - start_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
-
-#if 0 && defined CONFIG_FORMAT_MACH
- {
- typedef struct { const char* name; int nonlazy; } SymRef;
-
- EXE_RELOC* rel = relocs;
- EXE_RELOC* rel_end = relocs + nb_relocs;
- SymRef* symrefs = NULL;
- int num_symrefs = 0;
- int max_symrefs = 0;
-
- for ( ; rel < rel_end; rel++ )
- {
- const char* sym_name = get_rel_sym_name(rel);
- int nn;
-
- 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))
- continue;
-
- for (nn = 0; nn < num_symrefs; nn++) {
- if ( !strcmp( sym_name, symrefs[nn].name ) )
- break;
- }
-
- if (nn >= num_symrefs)
- {
- if (num_symrefs >= max_symrefs) {
- int new_max = max_symrefs + 16;
- SymRef* new_refs = realloc( symrefs, new_max*sizeof(SymRef) );
- if (new_refs == NULL) {
- break;
- }
- symrefs = new_refs;
- max_symrefs = new_max;
- }
-
- symrefs[nn].name = sym_name;
- symrefs[nn].nonlazy = 0;
-
- fprintf(outfile, " extern char %s __attribute__((unused));\n", sym_name);
- num_symrefs++;
- }
-
- if ( !symrefs[nn].nonlazy && is_reloc_non_lazy(rel) ) {
- symrefs[nn].nonlazy = 1;
- fprintf(outfile, " static const void* __to_%s = &%s;\n", sym_name, sym_name );
- }
- }
- free( symrefs );
- }
-#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;
-}
generated by cgit v1.1 at 2024-06-13 07:01:27 +0000