*
* Copyright (c) 2003 Fabrice Bellard
*
+ * The COFF object format support was extracted from Kazu's QEMU port
+ * to Win32.
+ *
* 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
#include "config-host.h"
+#if defined(_WIN32)
+#define CONFIG_FORMAT_COFF
+#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) */
#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 */
+
#include "bswap.h"
enum {
/* all dynamically generated functions begin with this code */
#define OP_PREFIX "op_"
-int elf_must_swap(struct elfhdr *h)
+int do_swap;
+
+void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
{
- union {
- uint32_t i;
- uint8_t b[4];
- } swaptest;
+ va_list ap;
+ va_start(ap, fmt);
+ fprintf(stderr, "dyngen: ");
+ vfprintf(stderr, fmt, ap);
+ fprintf(stderr, "\n");
+ va_end(ap);
+ exit(1);
+}
- swaptest.i = 1;
- return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
- (swaptest.b[0] == 0);
+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);
*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 */
#endif
}
-/* ELF file info */
-int do_swap;
-struct elf_shdr *shdr;
-uint8_t **sdata;
-struct elfhdr ehdr;
-ElfW(Sym) *symtab;
-int nb_syms;
-char *strtab;
-int text_shndx;
+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;
-uint16_t get16(uint16_t *p)
+ 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)
{
- uint16_t val;
- val = *p;
- if (do_swap)
- val = bswap16(val);
- return val;
+ 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;
}
-uint32_t get32(uint32_t *p)
+static char *get_rel_sym_name(EXE_RELOC *rel)
{
- uint32_t val;
- val = *p;
+ 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)
- val = bswap32(val);
- return val;
+ 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';
+ }
}
-void put16(uint16_t *p, uint16_t val)
+char *name_for_dotdata(struct coff_rel *rel)
{
- if (do_swap)
- val = bswap16(val);
- *p = val;
+ 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;
}
-void put32(uint32_t *p, uint32_t val)
+static char *get_sym_name(EXE_SYM *sym)
{
- if (do_swap)
- val = bswap32(val);
- *p = val;
+ return sym->st_name;
}
-void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
+static char *get_rel_sym_name(EXE_RELOC *rel)
{
- va_list ap;
- va_start(ap, fmt);
- fprintf(stderr, "dyngen: ");
- vfprintf(stderr, fmt, ap);
- fprintf(stderr, "\n");
- va_end(ap);
- exit(1);
+ char *name;
+ name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
+ if (!strcmp(name, ".data"))
+ name = name_for_dotdata(rel);
+ return name;
}
-
-struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr,
- const char *name)
+struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name)
{
int i;
const char *shname;
- struct elf_shdr *sec;
+ struct external_scnhdr *sec;
for(i = 0; i < shnum; i++) {
sec = &shdr[i];
- if (!sec->sh_name)
+ if (!sec->s_name)
continue;
- shname = shstr + sec->sh_name;
+ shname = sec->s_name;
if (!strcmp(shname, name))
return sec;
}
return NULL;
}
-int find_reloc(int sh_index)
+/* load a coff object file */
+int load_object(const char *filename)
{
- struct elf_shdr *sec;
+ 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");
- for(i = 0; i < ehdr.e_shnum; i++) {
+ /* 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 (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
- return i;
+ if (!strstart(sec->s_name, ".bss", &p))
+ sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size);
}
- return 0;
-}
-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;
+ /* 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");
}
- 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++;
+
+ 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;
}
- if (ptr)
- *ptr = p;
- return 1;
+
+ /* 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 HOST_ARM
int arm_emit_ldr_info(const char *name, unsigned long start_offset,
relname[0] = '\0';
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset == (pc_offset + start_offset)) {
- sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
+ sym_name = get_rel_sym_name(rel);
/* the compiler leave some unnecessary references to the code */
if (strstart(sym_name, "__op_param", &p)) {
snprintf(relname, sizeof(relname), "param%s", p);
/* generate op code */
void gen_code(const char *name, host_ulong offset, host_ulong size,
- FILE *outfile, uint8_t *text, ELF_RELOC *relocs, int nb_relocs,
- int gen_switch)
+ FILE *outfile, int gen_switch)
{
int copy_size = 0;
uint8_t *p_start, *p_end;
int nb_args, i, n;
uint8_t args_present[MAX_ARGS];
const char *sym_name, *p;
- ELF_RELOC *rel;
+ EXE_RELOC *rel;
/* Compute exact size excluding prologue and epilogue instructions.
* Increment start_offset to skip epilogue instructions, then compute
p_start = text + offset;
p_end = p_start + size;
start_offset = offset;
- switch(ELF_ARCH) {
- case EM_386:
- case EM_X86_64:
- {
- int len;
- len = p_end - p_start;
- if (len == 0)
- error("empty code for %s", name);
- if (p_end[-1] == 0xc3) {
- len--;
- } else {
+#if defined(HOST_I386) || defined(HOST_AMD64)
+#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 = len;
}
- break;
- case EM_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;
+ 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);
}
- break;
- case EM_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;
- }
- break;
- case EM_ALPHA:
- {
- uint8_t *p;
- p = p_end - 4;
+ 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);
+ /* 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;
- }
- break;
- case EM_IA_64:
- {
- 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 - p_start;
- }
- break;
- case EM_SPARC:
- case EM_SPARC32PLUS:
- {
- 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 (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 - 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;
- }
+ /* 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;
- }
- break;
- case EM_SPARCV9:
- {
- 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;
- }
- break;
-#ifdef HOST_ARM
- case EM_ARM:
+ 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 ||
start_offset += 12;
copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
relocs, nb_relocs);
- break;
-#endif
- case EM_68K:
- {
- 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;
- }
- break;
- default:
- error("unknown ELF architecture");
}
+#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++)
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + (p_end - p_start)) {
- sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
+ sym_name = get_rel_sym_name(rel);
if (strstart(sym_name, "__op_param", &p)) {
n = strtoul(p, NULL, 10);
if (n > MAX_ARGS)
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + (p_end - p_start)) {
- sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
+ sym_name = get_rel_sym_name(rel);
if (*sym_name &&
!strstart(sym_name, "__op_param", NULL) &&
!strstart(sym_name, "__op_jmp", NULL)) {
/* emit code offset information */
{
- ElfW(Sym) *sym;
+ 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 = strtab + sym->st_name;
+ 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;
+ }
+#else
ptr = sdata[sym->st_shndx];
+#endif
if (!ptr)
error("__op_labelN in invalid section");
offset = sym->st_value;
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;
+ sym_name = get_rel_sym_name(rel);
if (strstart(sym_name, "__op_jmp", &p)) {
int n;
n = strtol(p, NULL, 10);
} else {
snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
}
- type = ELF32_R_TYPE(rel->r_info);
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",
default:
error("unsupported i386 relocation (%d)", type);
}
+#elif defined(CONFIG_FORMAT_COFF)
+ type = rel->r_type;
+ switch(type) {
+ case DIR32:
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
+ rel->r_offset - start_offset, name, addend);
+ break;
+ case DISP32:
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
+ rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
+ break;
+ default:
+ error("unsupported i386 relocation (%d)", type);
+ }
+#else
+#error unsupport object format
+#endif
}
}
}
}
}
-/* load an elf object file */
-int load_elf(const char *filename, FILE *outfile, int out_type)
+int gen_file(FILE *outfile, int out_type)
{
- int fd;
- struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
- int i, j;
- ElfW(Sym) *sym;
- char *shstr;
- uint8_t *text;
- ELF_RELOC *relocs;
- int nb_relocs;
- 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);
- }
- }
+ int i;
+ EXE_SYM *sym;
if (out_type == OUT_INDEX_OP) {
fprintf(outfile, "DEF(end, 0, 0)\n");
fprintf(outfile, "DEF(nop3, 3, 0)\n");
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
const char *name, *p;
- name = strtab + sym->st_name;
+ name = get_sym_name(sym);
if (strstart(name, OP_PREFIX, &p)) {
- gen_code(name, sym->st_value, sym->st_size, outfile,
- text, relocs, nb_relocs, 2);
+ gen_code(name, sym->st_value, sym->st_size, outfile, 2);
}
}
} else if (out_type == OUT_GEN_OP) {
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
const char *name;
- name = strtab + sym->st_name;
+ name = get_sym_name(sym);
if (strstart(name, OP_PREFIX, NULL)) {
- if (sym->st_shndx != (text_sec - shdr))
+ if (sym->st_shndx != text_shndx)
error("invalid section for opcode (0x%x)", sym->st_shndx);
- gen_code(name, sym->st_value, sym->st_size, outfile,
- text, relocs, nb_relocs, 0);
+ gen_code(name, sym->st_value, sym->st_size, outfile, 0);
}
}
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
const char *name;
- name = strtab + sym->st_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 (sym->st_shndx != (text_sec - shdr))
+ if (sym->st_shndx != text_shndx)
error("invalid section for opcode (0x%x)", sym->st_shndx);
- gen_code(name, sym->st_value, sym->st_size, outfile,
- text, relocs, nb_relocs, 1);
+ gen_code(name, sym->st_value, sym->st_size, outfile, 1);
}
}
}
- close(fd);
return 0;
}
outfile = fopen(outfilename, "w");
if (!outfile)
error("could not open '%s'", outfilename);
- load_elf(filename, outfile, out_type);
+
+ load_object(filename);
+ gen_file(outfile, out_type);
fclose(outfile);
return 0;
}
projects / qemu / blobdiff