/*
* 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
#include <unistd.h>
#include <fcntl.h>
-#include "config.h"
+#include "config-host.h"
+
+/* NOTE: we test CONFIG_WIN32 instead of _WIN32 to enabled cross
+ compilation */
+#if defined(CONFIG_WIN32)
+#define CONFIG_FORMAT_COFF
+#elif defined(CONFIG_DARWIN)
+#define CONFIG_FORMAT_MACH
+#else
+#define CONFIG_FORMAT_ELF
+#endif
+
+#ifdef CONFIG_FORMAT_ELF
/* elf format definitions. We use these macros to test the CPU to
allow cross compilation (this tool must be ran on the build
#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_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
+
+#elif defined(HOST_MIPS)
+
+#define ELF_CLASS ELFCLASS32
+#define ELF_ARCH EM_MIPS
+#define elf_check_arch(x) ((x) == EM_MIPS)
+#define ELF_USES_RELOC
+
+#elif defined(HOST_MIPS64)
+
+/* Assume n32 ABI here, which is ELF32. */
+#define ELF_CLASS ELFCLASS32
+#define ELF_ARCH EM_MIPS
+#define elf_check_arch(x) ((x) == EM_MIPS)
+#define ELF_USES_RELOCA
+
#else
#error unsupported CPU - please update the code
#endif
typedef int32_t host_long;
typedef uint32_t host_ulong;
#define swabls(x) swab32s(x)
+#define swablss(x) swab32ss(x)
#else
typedef int64_t host_long;
typedef uint64_t host_ulong;
#define swabls(x) swab64s(x)
+#define swablss(x) swab64ss(x)
+#endif
+
+#ifdef ELF_USES_RELOCA
+#define SHT_RELOC SHT_RELA
+#else
+#define SHT_RELOC SHT_REL
#endif
-#include "thunk.h"
+#define EXE_RELOC ELF_RELOC
+#define EXE_SYM ElfW(Sym)
+
+#endif /* CONFIG_FORMAT_ELF */
+
+#ifdef CONFIG_FORMAT_COFF
+
+typedef int32_t host_long;
+typedef uint32_t host_ulong;
+
+#include "a.out.h"
+
+#define FILENAMELEN 256
+
+typedef struct coff_sym {
+ struct external_syment *st_syment;
+ char st_name[FILENAMELEN];
+ uint32_t st_value;
+ int st_size;
+ uint8_t st_type;
+ uint8_t st_shndx;
+} coff_Sym;
+
+typedef struct coff_rel {
+ struct external_reloc *r_reloc;
+ int r_offset;
+ uint8_t r_type;
+} coff_Rel;
+
+#define EXE_RELOC struct coff_rel
+#define EXE_SYM struct coff_sym
+
+#endif /* CONFIG_FORMAT_COFF */
+
+#ifdef CONFIG_FORMAT_MACH
+
+#include <mach-o/loader.h>
+#include <mach-o/nlist.h>
+#include <mach-o/reloc.h>
+#include <mach-o/ppc/reloc.h>
+
+# define check_mach_header(x) (x.magic == MH_MAGIC)
+typedef int32_t host_long;
+typedef uint32_t host_ulong;
+
+struct nlist_extended
+{
+ union {
+ char *n_name;
+ long n_strx;
+ } n_un;
+ unsigned char n_type;
+ unsigned char n_sect;
+ short st_desc;
+ unsigned long st_value;
+ unsigned long st_size;
+};
+
+#define EXE_RELOC struct relocation_info
+#define EXE_SYM struct nlist_extended
+
+#endif /* CONFIG_FORMAT_MACH */
+
+#include "bswap.h"
+
+enum {
+ OUT_GEN_OP,
+ OUT_CODE,
+ OUT_INDEX_OP,
+};
/* all dynamically generated functions begin with this code */
#define OP_PREFIX "op_"
-int 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 = bswap32(*p);
}
+void swab32ss(int32_t *p)
+{
+ *p = bswap32(*p);
+}
+
void swab64s(uint64_t *p)
{
*p = bswap64(*p);
}
+void swab64ss(int64_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 */
swabls(&h->p_align); /* Segment alignment */
}
-int do_swap;
-
-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;
-}
-
-void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
+void elf_swap_rel(ELF_RELOC *rel)
{
- va_list ap;
- va_start(ap, fmt);
- fprintf(stderr, "dyngen: ");
- vfprintf(stderr, fmt, ap);
- fprintf(stderr, "\n");
- va_end(ap);
- exit(1);
+ swabls(&rel->r_offset);
+ swabls(&rel->r_info);
+#ifdef ELF_USES_RELOCA
+ swablss(&rel->r_addend);
+#endif
}
-
-struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr,
+struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr,
const char *name)
{
int i;
return NULL;
}
-void *load_data(int fd, long offset, unsigned int size)
+int find_reloc(int sh_index)
{
- char *data;
+ struct elf_shdr *sec;
+ int i;
- data = malloc(size);
- if (!data)
- return NULL;
- lseek(fd, offset, SEEK_SET);
- if (read(fd, data, size) != size) {
- free(data);
- return NULL;
+ 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 data;
+ return 0;
}
-int strstart(const char *str, const char *val, const char **ptr)
+static host_ulong get_rel_offset(EXE_RELOC *rel)
{
- const char *p, *q;
- p = str;
- q = val;
- while (*q != '\0') {
- if (*p != *q)
- return 0;
- p++;
- q++;
- }
- if (ptr)
- *ptr = p;
- return 1;
+ return rel->r_offset;
}
-#define MAX_ARGS 3
+static char *get_rel_sym_name(EXE_RELOC *rel)
+{
+ return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
+}
-/* 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 reloc_sh_type,
- ElfW(Sym) *symtab, char *strtab, int gen_switch)
+static char *get_sym_name(EXE_SYM *sym)
{
- 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;
+ 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;
- /* compute exact size excluding return instruction */
- p_start = text + offset;
- p_end = p_start + size;
- switch(ELF_ARCH) {
- case EM_386:
- {
- uint8_t *p;
- p = p_end - 1;
- if (p == p_start)
- error("empty code for %s", name);
- if (p[0] != 0xc3)
- error("ret expected at the end of %s", name);
- copy_size = p - p_start;
- }
- 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;
- }
- break;
- case EM_S390:
+ 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 = (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 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++ )
{
- 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;
+ 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;
+ }
}
- break;
- case EM_ALPHA:
- {
- uint8_t *p;
- p = p_end - 4;
- if (p == p_start)
- error("empty code for %s", name);
- if (get32((uint32_t *)p) != 0x6bfa8001)
- error("ret expected at the end of %s", name);
- copy_size = p - p_start;
+ if( ret < 0 ) {
+ *offset = 0;
+ return 0;
+ } else {
+ *offset = value - symtab[ret].st_value;
+ return get_sym_name(&symtab[ret]);
+ }
+}
+
+/*
+ * Find symbol name given a (virtual) address, and a section which is of type
+ * S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
+ */
+static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr)
+{
+ unsigned int tocindex, symindex, size;
+ const char *name = 0;
+
+ /* Sanity check */
+ if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
+ return (char*)0;
+
+ if( sec_hdr->flags & S_SYMBOL_STUBS ){
+ size = sec_hdr->reserved2;
+ if(size == 0)
+ error("size = 0");
+
+ }
+ else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS ||
+ sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
+ size = sizeof(unsigned long);
+ else
+ return 0;
+
+ /* Compute our index in toc */
+ tocindex = (address - sec_hdr->addr)/size;
+ symindex = tocdylib[sec_hdr->reserved1 + tocindex];
+
+ name = get_sym_name(&symtab[symindex]);
+
+ return name;
+}
+
+static const char * find_reloc_name_given_its_address(int address)
+{
+ unsigned int i;
+ for(i = 0; i < segment->nsects ; i++)
+ {
+ const char * name = find_reloc_name_in_sec_ptr(address, §ion_hdr[i]);
+ if((long)name != -1)
+ return name;
+ }
+ return 0;
+}
+
+static const char * get_reloc_name(EXE_RELOC * rel, int * sslide)
+{
+ char * name = 0;
+ struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
+ int sectnum = rel->r_symbolnum;
+ int sectoffset;
+ int other_half=0;
+
+ /* init the slide value */
+ *sslide = 0;
+
+ if(R_SCATTERED & rel->r_address)
+ return (char *)find_reloc_name_given_its_address(sca_rel->r_value);
+
+ if(rel->r_extern)
+ {
+ /* ignore debug sym */
+ if ( symtab[rel->r_symbolnum].n_type & N_STAB )
+ return 0;
+ return get_sym_name(&symtab[rel->r_symbolnum]);
}
- break;
- case EM_IA_64:
+
+ /* 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)
{
- 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;
+ case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16);
+ break;
+ case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff);
+ break;
+ case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff);
+ break;
+ case PPC_RELOC_BR24:
+ sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
+ if (sectoffset & 0x02000000) sectoffset |= 0xfc000000;
+ break;
+ default:
+ error("switch(rel->type) not found");
+ }
+
+ if(rel->r_pcrel)
+ sectoffset += rel->r_address;
+
+ if (rel->r_type == PPC_RELOC_BR24)
+ name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, §ion_hdr[sectnum-1]);
+
+ /* search it in the full symbol list, if not found */
+ if(!name)
+ name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
+
+ return name;
+}
+
+/* Used by dyngen common code */
+static const char * get_rel_sym_name(EXE_RELOC * rel)
+{
+ int sslide;
+ return get_reloc_name( rel, &sslide);
+}
+
+/* Used by dyngen common code */
+static host_ulong get_rel_offset(EXE_RELOC *rel)
+{
+ struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
+ if(R_SCATTERED & rel->r_address)
+ return sca_rel->r_address;
+ else
+ return rel->r_address;
+}
+
+/* load a mach-o object file */
+int load_object(const char *filename)
+{
+ int fd;
+ unsigned int offset_to_segment = 0;
+ unsigned int offset_to_dysymtab = 0;
+ unsigned int offset_to_symtab = 0;
+ struct load_command lc;
+ unsigned int i, j;
+ EXE_SYM *sym;
+ struct nlist *syment;
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ error("can't open file '%s'", filename);
+
+ /* Read Mach header. */
+ if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr))
+ error("unable to read file header");
+
+ /* Check Mach identification. */
+ if (!check_mach_header(mach_hdr)) {
+ error("bad Mach header");
+ }
+
+ if (mach_hdr.cputype != CPU_TYPE_POWERPC)
+ error("Unsupported CPU");
+
+ if (mach_hdr.filetype != MH_OBJECT)
+ error("Unsupported Mach Object");
+
+ /* read segment headers */
+ for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++)
+ {
+ if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command))
+ error("unable to read load_command");
+ if(lc.cmd == LC_SEGMENT)
+ {
+ offset_to_segment = j;
+ lseek(fd, offset_to_segment, SEEK_SET);
+ segment = malloc(sizeof(struct segment_command));
+ if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command))
+ error("unable to read LC_SEGMENT");
+ }
+ if(lc.cmd == LC_DYSYMTAB)
+ {
+ offset_to_dysymtab = j;
+ lseek(fd, offset_to_dysymtab, SEEK_SET);
+ dysymtabcmd = malloc(sizeof(struct dysymtab_command));
+ if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command))
+ error("unable to read LC_DYSYMTAB");
+ }
+ if(lc.cmd == LC_SYMTAB)
+ {
+ offset_to_symtab = j;
+ lseek(fd, offset_to_symtab, SEEK_SET);
+ symtabcmd = malloc(sizeof(struct symtab_command));
+ if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command))
+ error("unable to read LC_SYMTAB");
+ }
+ j+=lc.cmdsize;
+
+ lseek(fd, j, SEEK_SET);
+ }
+
+ if(!segment)
+ error("unable to find LC_SEGMENT");
+
+ /* read section headers */
+ section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section));
+
+ /* read all section data */
+ sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects);
+ memset(sdata, 0, sizeof(void *) * segment->nsects);
+
+ /* Load the data in section data */
+ for(i = 0; i < segment->nsects; i++) {
+ sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size);
+ }
+
+ /* text section */
+ text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
+ i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
+ if (i == -1 || !text_sec_hdr)
+ error("could not find __TEXT,__text section");
+ text = sdata[i];
+
+ /* Make sure dysym was loaded */
+ if(!(int)dysymtabcmd)
+ error("could not find __DYSYMTAB segment");
+
+ /* read the table of content of the indirect sym */
+ tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
+
+ /* Make sure symtab was loaded */
+ if(!(int)symtabcmd)
+ error("could not find __SYMTAB segment");
+ nb_syms = symtabcmd->nsyms;
+
+ symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist));
+ strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize);
+
+ symtab = malloc(sizeof(EXE_SYM) * nb_syms);
+
+ /* Now transform the symtab, to an extended version, with the sym size, and the C name */
+ for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) {
+ struct nlist *sym_follow, *sym_next = 0;
+ unsigned int j;
+ memset(sym, 0, sizeof(*sym));
+
+ if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */
+ continue;
+
+ memcpy(sym, syment, sizeof(*syment));
+
+ /* Find the following symbol in order to get the current symbol size */
+ for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) {
+ if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value))
+ continue;
+ if(!sym_next) {
+ sym_next = sym_follow;
+ continue;
+ }
+ if(!(sym_next->n_value > sym_follow->n_value))
+ continue;
+ sym_next = sym_follow;
+ }
+ if(sym_next)
+ sym->st_size = sym_next->n_value - sym->st_value;
+ else
+ sym->st_size = text_sec_hdr->size - sym->st_value;
}
- break;
- default:
- error("unknown ELF architecture");
+
+ /* 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, spare, max_pool;
+ uint8_t data_allocated[1024];
+ unsigned int data_index;
+ int type;
+
+ memset(data_allocated, 0, sizeof(data_allocated));
+
+ p = p_start;
+ min_offset = p_end - p_start;
+ spare = 0x7fffffff;
+ while (p < p_start + min_offset) {
+ insn = get32((uint32_t *)p);
+ /* TODO: Armv5e ldrd. */
+ /* TODO: VFP load. */
+ if ((insn & 0x0d5f0000) == 0x051f0000) {
+ /* ldr reg, [pc, #im] */
+ offset = insn & 0xfff;
+ if (!(insn & 0x00800000))
+ offset = -offset;
+ max_pool = 4096;
+ type = 0;
+ } else if ((insn & 0x0e5f0f00) == 0x0c1f0100) {
+ /* FPA ldf. */
+ offset = (insn & 0xff) << 2;
+ if (!(insn & 0x00800000))
+ offset = -offset;
+ max_pool = 1024;
+ type = 1;
+ } else if ((insn & 0x0fff0000) == 0x028f0000) {
+ /* Some gcc load a doubleword immediate with
+ add regN, pc, #imm
+ ldmia regN, {regN, regM}
+ Hope and pray the compiler never generates somethin like
+ add reg, pc, #imm1; ldr reg, [reg, #-imm2]; */
+ int r;
+
+ r = (insn & 0xf00) >> 7;
+ offset = ((insn & 0xff) >> r) | ((insn & 0xff) << (32 - r));
+ max_pool = 1024;
+ type = 2;
+ } else {
+ max_pool = 0;
+ type = -1;
+ }
+ if (type >= 0) {
+ /* PC-relative load needs fixing up. */
+ if (spare > max_pool - offset)
+ spare = max_pool - offset;
+ if ((offset & 3) !=0)
+ error("%s:%04x: pc offset must be 32 bit aligned",
+ name, start_offset + p - p_start);
+ if (offset < 0)
+ error("%s:%04x: Embedded literal value",
+ 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: 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) {
+ /* The intruction position */
+ fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
+ p - p_start);
+ /* The position of the constant pool data. */
+ data_index = ((p_end - p_start) - pc_offset) >> 2;
+ fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr - %d;\n",
+ data_index);
+ fprintf(outfile, " arm_ldr_ptr->type = %d;\n", type);
+ fprintf(outfile, " arm_ldr_ptr++;\n");
+ }
+ }
+ p += 4;
+ }
+
+ /* Copy and relocate the constant pool data. */
+ data_size = (p_end - p_start) - min_offset;
+ if (data_size > 0 && outfile) {
+ spare += min_offset;
+ fprintf(outfile, " arm_data_ptr -= %d;\n", data_size >> 2);
+ fprintf(outfile, " arm_pool_ptr -= %d;\n", data_size);
+ fprintf(outfile, " if (arm_pool_ptr > gen_code_ptr + %d)\n"
+ " arm_pool_ptr = gen_code_ptr + %d;\n",
+ spare, spare);
+
+ data_index = 0;
+ for (pc_offset = min_offset;
+ pc_offset < p_end - p_start;
+ pc_offset += 4) {
+
+ ELF_RELOC *rel;
+ int i, addend, type;
+ const char *sym_name;
+ char relname[1024];
+
+ /* 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");
+
+ data_index++;
+ }
+ }
+
+ if (p == p_start)
+ goto arm_ret_error;
+ p -= 4;
+ insn = get32((uint32_t *)p);
+ /* The last instruction must be an ldm instruction. There are several
+ forms generated by gcc:
+ ldmib sp, {..., pc} (implies a sp adjustment of +4)
+ ldmia sp, {..., pc}
+ ldmea fp, {..., pc} */
+ if ((insn & 0xffff8000) == 0xe99d8000) {
+ if (outfile) {
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = 0xe28dd004;\n",
+ p - p_start);
+ }
+ p += 4;
+ } else if ((insn & 0xffff8000) != 0xe89d8000
+ && (insn & 0xffff8000) != 0xe91b8000) {
+ arm_ret_error:
+ if (!outfile)
+ printf("%s: invalid epilog\n", name);
+ }
+ return p - p_start;
+}
+#endif
+
+
+#define MAX_ARGS 3
+
+/* generate op code */
+void gen_code(const char *name, host_ulong offset, host_ulong size,
+ FILE *outfile, int gen_switch)
+{
+ int copy_size = 0;
+ uint8_t *p_start, *p_end;
+ host_ulong start_offset;
+ int nb_args, i, n;
+ uint8_t args_present[MAX_ARGS];
+ const char *sym_name, *p;
+ EXE_RELOC *rel;
+
+ /* Compute exact size excluding prologue and epilogue instructions.
+ * Increment start_offset to skip epilogue instructions, then compute
+ * copy_size the indicate the size of the remaining instructions (in
+ * bytes).
+ */
+ p_start = text + offset;
+ p_end = p_start + size;
+ start_offset = offset;
+#if defined(HOST_I386) || defined(HOST_X86_64)
+#ifdef CONFIG_FORMAT_COFF
+ {
+ uint8_t *p;
+ p = p_end - 1;
+ if (p == p_start)
+ error("empty code for %s", name);
+ while (*p != 0xc3) {
+ p--;
+ if (p <= p_start)
+ error("ret or jmp expected at the end of %s", name);
+ }
+ copy_size = p - p_start;
+ }
+#else
+ {
+ int len;
+ len = p_end - p_start;
+ if (len == 0)
+ error("empty code for %s", name);
+ if (p_end[-1] == 0xc3) {
+ len--;
+ } else {
+ error("ret or jmp expected at the end of %s", name);
+ }
+ copy_size = len;
+ }
+#endif
+#elif defined(HOST_PPC)
+ {
+ uint8_t *p;
+ p = (void *)(p_end - 4);
+ if (p == p_start)
+ error("empty code for %s", name);
+ if (get32((uint32_t *)p) != 0x4e800020)
+ error("blr expected at the end of %s", name);
+ copy_size = p - p_start;
+ }
+#elif defined(HOST_S390)
+ {
+ uint8_t *p;
+ p = (void *)(p_end - 2);
+ if (p == p_start)
+ error("empty code for %s", name);
+ if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4)
+ error("br %%r14 expected at the end of %s", name);
+ copy_size = p - p_start;
+ }
+#elif defined(HOST_ALPHA)
+ {
+ uint8_t *p;
+ p = p_end - 4;
+#if 0
+ /* XXX: check why it occurs */
+ if (p == p_start)
+ error("empty code for %s", name);
+#endif
+ if (get32((uint32_t *)p) != 0x6bfa8001)
+ error("ret expected at the end of %s", name);
+ copy_size = p - p_start;
+ }
+#elif defined(HOST_IA64)
+ {
+ uint8_t *p;
+ p = (void *)(p_end - 4);
+ if (p == p_start)
+ error("empty code for %s", name);
+ /* br.ret.sptk.many b0;; */
+ /* 08 00 84 00 */
+ if (get32((uint32_t *)p) != 0x00840008)
+ error("br.ret.sptk.many b0;; expected at the end of %s", name);
+ copy_size = p_end - p_start;
+ }
+#elif defined(HOST_SPARC)
+ {
+#define INSN_SAVE 0x9de3a000
+#define INSN_RET 0x81c7e008
+#define INSN_RETL 0x81c3e008
+#define INSN_RESTORE 0x81e80000
+#define INSN_RETURN 0x81cfe008
+#define INSN_NOP 0x01000000
+#define INSN_ADD_SP 0x9c03a000 // add %sp, nn, %sp
+#define INSN_SUB_SP 0x9c23a000 // sub %sp, nn, %sp
+
+ 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) ||
+ (start_insn & ~0x1fff) == INSN_ADD_SP) {
+ p_start += 0x4;
+ start_offset += 0x4;
+ 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 if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
+ /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
+ else
+
+ error("ret; restore; not found at end of %s", name);
+ } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
+ ;
+ } 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)
+ {
+#define INSN_SAVE 0x9de3a000
+#define INSN_RET 0x81c7e008
+#define INSN_RETL 0x81c3e008
+#define INSN_RESTORE 0x81e80000
+#define INSN_RETURN 0x81cfe008
+#define INSN_NOP 0x01000000
+#define INSN_ADD_SP 0x9c03a000 // add %sp, nn, %sp
+#define INSN_SUB_SP 0x9c23a000 // sub %sp, nn, %sp
+
+ uint32_t start_insn, end_insn1, end_insn2, skip_insn;
+ uint8_t *p;
+ p = (void *)(p_end - 8);
+#if 0
+ /* XXX: check why it occurs */
+ if (p <= p_start)
+ error("empty code for %s", name);
+#endif
+ 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) ||
+ (start_insn & ~0x1fff) == INSN_ADD_SP) {
+ p_start += 0x4;
+ start_offset += 0x4;
+ 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 if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
+ /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
+ else
+
+ error("ret; restore; not found at end of %s", name);
+ } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
+ ;
+ } 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)
+ {
+ uint32_t insn;
+
+ 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;
+ insn = get32((uint32_t *)p_start);
+ if ((insn & 0xffffff00) == 0xe24dd000) {
+ /* Stack adjustment. Assume op uses the frame pointer. */
+ p_start -= 4;
+ start_offset -= 4;
+ }
+ 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;
+ }
+#elif defined(HOST_MIPS) || defined(HOST_MIPS64)
+ {
+#define INSN_RETURN 0x03e00008
+#define INSN_NOP 0x00000000
+
+ uint8_t *p = p_end;
+
+ if (p < (p_start + 0x8)) {
+ error("empty code for %s", name);
+ } else {
+ uint32_t end_insn1, end_insn2;
+
+ p -= 0x8;
+ end_insn1 = get32((uint32_t *)(p + 0x0));
+ end_insn2 = get32((uint32_t *)(p + 0x4));
+ if (end_insn1 != INSN_RETURN && end_insn2 != INSN_NOP)
+ error("jr ra not found at 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++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
- sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
- if (strstart(sym_name, "__op_param", &p)) {
+ 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)
+ 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++;
}
if (gen_switch == 2) {
- fprintf(outfile, "DEF(%s, %d)\n", name + 3, nb_args);
+ fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
} else if (gen_switch == 1) {
/* output C code */
}
fprintf(outfile, ";\n");
}
+#if defined(HOST_IA64)
+ fprintf(outfile, " extern char %s;\n", name);
+#else
fprintf(outfile, " extern void %s();\n", name);
+#endif
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
- sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
- if (!strstart(sym_name, "__op_param", &p)) {
+ host_ulong offset = get_rel_offset(rel);
+ if (offset >= start_offset &&
+ offset < start_offset + (p_end - p_start)) {
+ sym_name = get_rel_sym_name(rel);
+ if(!sym_name)
+ continue;
+ if (*sym_name &&
+ !strstart(sym_name, "__op_param", NULL) &&
+ !strstart(sym_name, "__op_jmp", NULL) &&
+ !strstart(sym_name, "__op_gen_label", NULL)) {
+#if defined(HOST_SPARC)
+ if (sym_name[0] == '.') {
+ fprintf(outfile,
+ "extern char __dot_%s __asm__(\"%s\");\n",
+ sym_name+1, sym_name);
+ continue;
+ }
+#endif
+#if defined(__APPLE__)
+ /* Set __attribute((unused)) on darwin because we
+ want to avoid warning when we don't use the symbol. */
+ fprintf(outfile, " extern char %s __attribute__((unused));\n", sym_name);
+#elif defined(HOST_IA64)
+ if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
+ /*
+ * PCREL21 br.call targets generally
+ * are out of range and need to go
+ * through an "import stub".
+ */
+ fprintf(outfile, " extern char %s;\n",
+ sym_name);
+#else
fprintf(outfile, "extern char %s;\n", sym_name);
+#endif
}
}
}
- fprintf(outfile, " memcpy(gen_code_ptr, &%s, %d);\n", name, copy_size);
+ 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;
+ host_ulong 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 = *(host_ulong *)(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 parameters in variables */
for(i = 0; i < nb_args; i++) {
fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1);
}
/* patch relocations */
#if defined(HOST_I386)
{
- char name[256];
+ char relname[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(relname, sizeof(relname), 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, relname, addend);
+ break;
+ case R_386_PC32:
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
+ reloc_offset, relname, 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, relname, addend);
+ break;
+ case DISP32:
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
+ reloc_offset, relname, reloc_offset, addend);
+ break;
+ default:
+ error("unsupported i386 relocation (%d)", type);
+ }
+#else
+#error unsupport object format
+#endif
+ }
+ }
+ }
+#elif defined(HOST_X86_64)
+ {
+ char relname[256];
int type;
int addend;
+ int reloc_offset;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
- if (strstart(sym_name, "__op_param", &p)) {
- snprintf(name, sizeof(name), "param%s", p);
- } else {
- snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
- }
+ get_reloc_expr(relname, sizeof(relname), sym_name);
type = ELF32_R_TYPE(rel->r_info);
- addend = get32((uint32_t *)(text + rel->r_offset));
+ addend = rel->r_addend;
+ reloc_offset = rel->r_offset - start_offset;
switch(type) {
- case R_386_32:
- fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ case R_X86_64_32:
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
+ reloc_offset, relname, addend);
break;
- case R_386_PC32:
- fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
- rel->r_offset - offset, name, rel->r_offset - offset, addend);
+ case R_X86_64_32S:
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
+ reloc_offset, relname, 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, relname, reloc_offset, addend);
break;
default:
- error("unsupported i386 relocation (%d)", type);
+ error("unsupported X86_64 relocation (%d)", type);
}
}
}
}
#elif defined(HOST_PPC)
{
- char name[256];
+#ifdef CONFIG_FORMAT_ELF
+ char relname[256];
int type;
int addend;
+ int reloc_offset;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
- if (strstart(sym_name, "__op_param", &p)) {
- snprintf(name, sizeof(name), "param%s", p);
- } else {
- snprintf(name, sizeof(name), "(long)(&%s)", sym_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(relname, sizeof(relname), 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",
- rel->r_offset - offset, name, addend);
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
+ reloc_offset, relname, addend);
break;
case R_PPC_ADDR16_LO:
- fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
- rel->r_offset - offset, name, addend);
+ fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
+ reloc_offset, relname, addend);
break;
case R_PPC_ADDR16_HI:
- fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
- rel->r_offset - offset, name, addend);
+ fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
+ reloc_offset, relname, addend);
break;
case R_PPC_ADDR16_HA:
- fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
- rel->r_offset - offset, name, addend);
+ fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
+ reloc_offset, relname, 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",
- rel->r_offset - offset, rel->r_offset - offset, name, rel->r_offset - offset, addend);
+ 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, relname, reloc_offset, addend);
break;
default:
error("unsupported powerpc relocation (%d)", type);
}
}
}
+#elif defined(CONFIG_FORMAT_MACH)
+ struct scattered_relocation_info *scarel;
+ struct relocation_info * rel;
+ char final_sym_name[256];
+ const char *sym_name;
+ const char *p;
+ int slide, sslide;
+ int i;
+
+ for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
+ unsigned int offset, length, value = 0;
+ unsigned int type, pcrel, isym = 0;
+ unsigned int usesym = 0;
+
+ if(R_SCATTERED & rel->r_address) {
+ scarel = (struct scattered_relocation_info*)rel;
+ offset = (unsigned int)scarel->r_address;
+ length = scarel->r_length;
+ pcrel = scarel->r_pcrel;
+ type = scarel->r_type;
+ value = scarel->r_value;
+ } else {
+ value = isym = rel->r_symbolnum;
+ usesym = (rel->r_extern);
+ offset = rel->r_address;
+ length = rel->r_length;
+ pcrel = rel->r_pcrel;
+ type = rel->r_type;
+ }
+
+ slide = offset - start_offset;
+
+ if (!(offset >= start_offset && offset < start_offset + size))
+ continue; /* not in our range */
+
+ sym_name = get_reloc_name(rel, &sslide);
+
+ if(usesym && symtab[isym].n_type & N_STAB)
+ continue; /* don't handle STAB (debug sym) */
+
+ if (sym_name && strstart(sym_name, "__op_jmp", &p)) {
+ int n;
+ n = strtol(p, NULL, 10);
+ fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
+ n, slide);
+ continue; /* Nothing more to do */
+ }
+
+ if(!sym_name) {
+ fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
+ name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type);
+ continue; /* dunno how to handle without final_sym_name */
+ }
+
+ get_reloc_expr(final_sym_name, sizeof(final_sym_name),
+ sym_name);
+ switch(type) {
+ case PPC_RELOC_BR24:
+ if (!strstart(sym_name,"__op_gen_label",&p)) {
+ fprintf(outfile, "{\n");
+ fprintf(outfile, " uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((imm + ((long)%s - (long)gen_code_ptr) + %d) & 0x03fffffc);\n",
+ slide, slide, name, sslide);
+ fprintf(outfile, "}\n");
+ } else {
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
+ slide, slide, final_sym_name, slide);
+ }
+ break;
+ case PPC_RELOC_HI16:
+ fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
+ slide, final_sym_name, sslide);
+ break;
+ case PPC_RELOC_LO16:
+ fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
+ slide, final_sym_name, sslide);
+ break;
+ case PPC_RELOC_HA16:
+ fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
+ slide, final_sym_name, sslide);
+ break;
+ default:
+ error("unsupported powerpc relocation (%d)", type);
+ }
+ }
+#else
+#error unsupport object format
+#endif
}
#elif defined(HOST_S390)
{
- char name[256];
+ char relname[256];
int type;
int addend;
+ int reloc_offset;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
- if (strstart(sym_name, "__op_param", &p)) {
- snprintf(name, sizeof(name), "param%s", p);
- } else {
- snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
- }
+ get_reloc_expr(relname, sizeof(relname), 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",
- rel->r_offset - offset, name, addend);
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
+ reloc_offset, relname, addend);
break;
case R_390_16:
- fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
+ reloc_offset, relname, addend);
break;
case R_390_8:
- fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
+ reloc_offset, relname, 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 >= offset && rel->r_offset < offset + copy_size) {
+ if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
int type;
- sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
-
+ 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:
- /* Instructions to set up the gp can be nopped, since we keep it current
- all the time. FIXME assert that target is really gp */
- fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = 0x2ffe0000; /* unop */\n",
- rel->r_offset - offset);
+ /* 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
correct for in-function jumps. */
break;
case R_ALPHA_LITERAL:
- /* Load a literal from the GOT relative to the gp. Need to patch the
- 16-bit immediate offset. */
- fprintf(outfile, " *(int16_t *)(gen_code_ptr + %d) = gp - (long)(&%s);\n",
- rel->r_offset - offset, name);
+ /* 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)
{
- char name[256];
+ unsigned long sym_idx;
+ long code_offset;
+ char relname[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(relname, sizeof(relname), 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, relname, addend);
+ break;
+ case R_IA64_LTOFF22X:
+ case R_IA64_LTOFF22:
+ fprintf(outfile, " IA64_LTOFF(gen_code_ptr + %ld,"
+ " %s + %ld, %d);\n",
+ code_offset, relname, addend,
+ (type == R_IA64_LTOFF22X));
+ break;
+ case R_IA64_LDXMOV:
+ fprintf(outfile,
+ " ia64_ldxmov(gen_code_ptr + %ld,"
+ " %s + %ld);\n", code_offset, relname, 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, relname, 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 relname[256];
int type;
int addend;
+ int reloc_offset;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
- sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
- if (strstart(sym_name, "__op_param", &p)) {
- snprintf(name, sizeof(name), "param%s", p);
- } else {
- snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
+ 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(relname, sizeof(relname), 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, relname, 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, relname, 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, relname, 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, relname, 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,
+ relname, addend,
+ rel->r_offset - start_offset);
+ break;
+ default:
+ error("unsupported sparc relocation (%d)", type);
}
- type = ELF64_R_TYPE(rel->r_info);
+ }
+ }
+ }
+#elif defined(HOST_SPARC64)
+ {
+ char relname[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(relname, sizeof(relname), sym_name);
+ type = ELF32_R_TYPE(rel->r_info);
addend = rel->r_addend;
+ reloc_offset = rel->r_offset - start_offset;
switch(type) {
- case R_IA64_LTOFF22:
- error("must implemnt R_IA64_LTOFF22 relocation");
- case R_IA64_PCREL21B:
- error("must implemnt R_IA64_PCREL21B relocation");
+ case R_SPARC_32:
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
+ reloc_offset, relname, 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, relname, 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, relname, addend);
+ break;
+ case R_SPARC_OLO10:
+ addend += ELF64_R_TYPE_DATA (rel->r_info);
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x3ff) "
+ " | ((%s + %d) & 0x3ff);\n",
+ reloc_offset, reloc_offset, relname, 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, relname, 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",
+ reloc_offset, reloc_offset, relname, addend,
+ reloc_offset);
+ break;
+ case R_SPARC_HH22:
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x00000000) "
+ " | (((%s + %d) >> 42) & 0x00000000);\n",
+ reloc_offset, reloc_offset, relname, addend);
+ break;
+
+ case R_SPARC_LM22:
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x00000000) "
+ " | (((%s + %d) >> 10) & 0x00000000);\n",
+ reloc_offset, reloc_offset, relname, addend);
+ break;
+
+ case R_SPARC_HM10:
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x00000000) "
+ " | ((((%s + %d) >> 32 & 0x3ff)) & 0x00000000);\n",
+ reloc_offset, reloc_offset, relname, addend);
+ break;
+
default:
- error("unsupported ia64 relocation (%d)", type);
+ error("unsupported sparc64 relocation (%d) for symbol %s", type, relname);
}
}
}
}
+#elif defined(HOST_ARM)
+ {
+ char relname[256];
+ int type;
+ int addend;
+ int reloc_offset;
+ uint32_t insn;
+
+ insn = get32((uint32_t *)(p_start + 4));
+ /* If prologue ends in sub sp, sp, #const then assume
+ op has a stack frame and needs the frame pointer. */
+ if ((insn & 0xffffff00) == 0xe24dd000) {
+ int i;
+ uint32_t opcode;
+ opcode = 0xe28db000; /* add fp, sp, #0. */
+#if 0
+/* ??? Need to undo the extra stack adjustment at the end of the op.
+ For now just leave the stack misaligned and hope it doesn't break anything
+ too important. */
+ if ((insn & 4) != 0) {
+ /* Preserve doubleword stack alignment. */
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + 4)= 0x%x;\n",
+ insn + 4);
+ opcode -= 4;
+ }
+#endif
+ insn = get32((uint32_t *)(p_start - 4));
+ /* Calculate the size of the saved registers,
+ excluding pc. */
+ for (i = 0; i < 15; i++) {
+ if (insn & (1 << i))
+ opcode += 4;
+ }
+ fprintf(outfile,
+ " *(uint32_t *)gen_code_ptr = 0x%x;\n", opcode);
+ }
+ arm_emit_ldr_info(relname, 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(relname, sizeof(relname), 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, relname, addend);
+ break;
+ case R_ARM_PC24:
+ case R_ARM_JUMP24:
+ case R_ARM_CALL:
+ fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
+ reloc_offset, addend, relname);
+ break;
+ default:
+ error("unsupported arm relocation (%d)", type);
+ }
+ }
+ }
+ }
+#elif defined(HOST_M68K)
+ {
+ char relname[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(relname, sizeof(relname), 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, relname, 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, relname, reloc_offset, /*sym->st_value+*/ addend);
+ break;
+ default:
+ error("unsupported m68k relocation (%d)", type);
+ }
+ }
+ }
+ }
+#elif defined(HOST_MIPS) || defined(HOST_MIPS64)
+ {
+ for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
+ if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
+ char relname[256];
+ int type;
+ int addend;
+ int reloc_offset;
+
+ sym_name = strtab + symtab[ELF32_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(relname, sizeof(relname), 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_MIPS_26:
+ fprintf(outfile, " /* R_MIPS_26 RELOC, offset 0x%x, name %s */\n",
+ rel->r_offset, sym_name);
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + 0x%x) = "
+ "(0x%x & ~0x3fffff) "
+ "| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
+ " & 0x3fffff);\n",
+ reloc_offset, addend, addend, relname, reloc_offset);
+ break;
+ case R_MIPS_HI16:
+ fprintf(outfile, " /* R_MIPS_HI16 RELOC, offset 0x%x, name %s */\n",
+ rel->r_offset, sym_name);
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + 0x%x) = "
+ "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
+ " & ~0xffff) "
+ " | (((%s - 0x8000) >> 16) & 0xffff);\n",
+ reloc_offset, reloc_offset, relname);
+ break;
+ case R_MIPS_LO16:
+ fprintf(outfile, " /* R_MIPS_LO16 RELOC, offset 0x%x, name %s */\n",
+ rel->r_offset, sym_name);
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + 0x%x) = "
+ "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
+ " & ~0xffff) "
+ " | (%s & 0xffff);\n",
+ reloc_offset, reloc_offset, relname);
+ break;
+ case R_MIPS_PC16:
+ fprintf(outfile, " /* R_MIPS_PC16 RELOC, offset 0x%x, name %s */\n",
+ rel->r_offset, sym_name);
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + 0x%x) = "
+ "(0x%x & ~0xffff) "
+ "| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
+ " & 0xffff);\n",
+ reloc_offset, addend, addend, relname, reloc_offset);
+ break;
+ case R_MIPS_GOT16:
+ case R_MIPS_CALL16:
+ fprintf(outfile, " /* R_MIPS_GOT16 RELOC, offset 0x%x, name %s */\n",
+ rel->r_offset, sym_name);
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + 0x%x) = "
+ "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
+ " & ~0xffff) "
+ " | (((%s - 0x8000) >> 16) & 0xffff);\n",
+ reloc_offset, reloc_offset, relname);
+ break;
+ default:
+ error("unsupported MIPS relocation (%d)", type);
+ }
+ }
+ }
+ }
#else
#error unsupported CPU
#endif
}
}
-/* load an elf object file */
-int load_elf(const char *filename, FILE *outfile, int do_print_enum)
+int gen_file(FILE *outfile, int out_type)
{
- int fd;
- struct elfhdr ehdr;
- struct elf_shdr *sec, *shdr, *symtab_sec, *strtab_sec, *text_sec;
- int i, j, nb_syms;
- ElfW(Sym) *symtab, *sym;
- char *shstr, *strtab;
- uint8_t *text;
- void *relocs;
- int nb_relocs, reloc_sh_type;
-
- 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]);
- }
- }
-
- sec = &shdr[ehdr.e_shstrndx];
- shstr = load_data(fd, sec->sh_offset, sec->sh_size);
-
- /* text section */
-
- text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
- if (!text_sec)
- error("could not find .text section");
- text = load_data(fd, text_sec->sh_offset, text_sec->sh_size);
-
- /* find text relocations, if any */
- nb_relocs = 0;
- relocs = NULL;
- reloc_sh_type = 0;
- for(i = 0; i < ehdr.e_shnum; i++) {
- sec = &shdr[i];
- if ((sec->sh_type == SHT_REL || sec->sh_type == SHT_RELA) &&
- sec->sh_info == (text_sec - shdr)) {
- reloc_sh_type = sec->sh_type;
- relocs = load_data(fd, sec->sh_offset, sec->sh_size);
- nb_relocs = sec->sh_size / sec->sh_entsize;
- if (do_swap) {
- if (sec->sh_type == SHT_REL) {
- ElfW(Rel) *rel = relocs;
- for(j = 0, rel = relocs; j < nb_relocs; j++, rel++) {
- swabls(&rel->r_offset);
- swabls(&rel->r_info);
- }
- } else {
- ElfW(Rela) *rel = relocs;
- for(j = 0, rel = relocs; j < nb_relocs; j++, rel++) {
- swabls(&rel->r_offset);
- swabls(&rel->r_info);
- swabls(&rel->r_addend);
- }
- }
- }
- break;
- }
- }
-
- 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 = load_data(fd, symtab_sec->sh_offset, symtab_sec->sh_size);
- strtab = load_data(fd, strtab_sec->sh_offset, strtab_sec->sh_size);
-
- nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
- if (do_swap) {
+ 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++) {
- swab32s(&sym->st_name);
- swabls(&sym->st_value);
- swabls(&sym->st_size);
- swab16s(&sym->st_shndx);
+ 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);
+ }
}
- }
-
- if (do_print_enum) {
- fprintf(outfile, "DEF(end, 0)\n");
+ } 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, *p;
- name = strtab + sym->st_name;
- if (strstart(name, OP_PREFIX, &p)) {
- gen_code(name, sym->st_value, sym->st_size, outfile,
- text, relocs, nb_relocs, reloc_sh_type, symtab, strtab, 2);
+ 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 */
-#ifdef HOST_ALPHA
- fprintf(outfile, "register long gp asm(\"%%$29\");\n");
+
+#ifdef HOST_ARM
+ /* We need to know the size of all the ops so we can figure out when
+ to emit constant pools. This must be consistent with opc.h. */
+fprintf(outfile,
+"static const uint32_t arm_opc_size[] = {\n"
+" 0,\n" /* end */
+" 0,\n" /* nop */
+" 0,\n" /* nop1 */
+" 0,\n" /* nop2 */
+" 0,\n"); /* nop3 */
+ for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
+ const char *name;
+ name = get_sym_name(sym);
+ if (strstart(name, OP_PREFIX, NULL)) {
+ fprintf(outfile, " %d,\n", sym->st_size);
+ }
+ }
+fprintf(outfile,
+"};\n");
#endif
+
fprintf(outfile,
"int dyngen_code(uint8_t *gen_code_buf,\n"
-" const uint16_t *opc_buf, const uint32_t *opparam_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"
+" const uint32_t *opparam_ptr;\n");
+
+#ifdef HOST_ARM
+/* Arm is tricky because it uses constant pools for loading immediate values.
+ We assume (and require) each function is code followed by a constant pool.
+ All the ops are small so this should be ok. For each op we figure
+ out how much "spare" range we have in the load instructions. This allows
+ us to insert subsequent ops in between the op and the constant pool,
+ eliminating the neeed to jump around the pool.
+
+ We currently generate:
+
+ [ For this example we assume merging would move op1_pool out of range.
+ In practice we should be able to combine many ops before the offset
+ limits are reached. ]
+ op1_code;
+ op2_code;
+ goto op3;
+ op2_pool;
+ op1_pool;
+op3:
+ op3_code;
+ ret;
+ op3_pool;
+
+ Ideally we'd put op1_pool before op2_pool, but that requires two passes.
+ */
+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 + ARM_LDR_TABLE_SIZE;\n"
+/* Initialise the parmissible pool offset to an arbitary large value. */
+" uint8_t *arm_pool_ptr = gen_code_buf + 0x1000000;\n");
+#endif
+#ifdef HOST_IA64
+ {
+ long addend, not_first = 0;
+ unsigned long sym_idx;
+ int index, max_index;
+ const char *sym_name;
+ EXE_RELOC *rel;
+
+ max_index = -1;
+ for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
+ sym_idx = ELF64_R_SYM(rel->r_info);
+ sym_name = (strtab + symtab[sym_idx].st_name);
+ if (strstart(sym_name, "__op_gen_label", NULL))
+ continue;
+ if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
+ continue;
+
+ addend = rel->r_addend;
+ index = get_plt_index(sym_name, addend);
+ if (index <= max_index)
+ continue;
+ max_index = index;
+ fprintf(outfile, " extern void %s(void);\n", sym_name);
+ }
+
+ fprintf(outfile,
+ " struct ia64_fixup *plt_fixes = NULL, "
+ "*ltoff_fixes = NULL;\n"
+ " static long plt_target[] = {\n\t");
+
+ max_index = -1;
+ for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
+ sym_idx = ELF64_R_SYM(rel->r_info);
+ sym_name = (strtab + symtab[sym_idx].st_name);
+ if (strstart(sym_name, "__op_gen_label", NULL))
+ continue;
+ if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
+ continue;
+
+ addend = rel->r_addend;
+ index = get_plt_index(sym_name, addend);
+ if (index <= max_index)
+ continue;
+ max_index = index;
+
+ if (not_first)
+ fprintf(outfile, ",\n\t");
+ not_first = 1;
+ if (addend)
+ fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
+ else
+ fprintf(outfile, "(long) &%s", sym_name);
+ }
+ fprintf(outfile, "\n };\n"
+ " unsigned int plt_offset[%u] = { 0 };\n", max_index + 1);
+ }
+#endif
+
+fprintf(outfile,
+"\n"
" gen_code_ptr = gen_code_buf;\n"
" opc_ptr = opc_buf;\n"
-" opparam_ptr = opparam_buf;\n"
-" for(;;) {\n"
-" switch(*opc_ptr++) {\n"
-);
+" opparam_ptr = opparam_buf;\n");
+
+ /* Generate prologue, if needed. */
+
+fprintf(outfile,
+" for(;;) {\n");
+
+#ifdef HOST_ARM
+/* Generate constant pool if needed */
+fprintf(outfile,
+" if (gen_code_ptr + arm_opc_size[*opc_ptr] >= arm_pool_ptr) {\n"
+" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
+"arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 1);\n"
+" last_gen_code_ptr = gen_code_ptr;\n"
+" arm_ldr_ptr = arm_ldr_table;\n"
+" arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
+" arm_pool_ptr = gen_code_ptr + 0x1000000;\n"
+" }\n");
+#endif
+
+fprintf(outfile,
+" switch(*opc_ptr++) {\n");
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",
+ 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 defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
+ 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, reloc_sh_type, symtab, strtab, 1);
+#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"
+" }\n");
+
+
+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,
+"if (arm_data_ptr != arm_data_table + ARM_LDR_TABLE_SIZE)\n"
+" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
+"arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 0);\n");
+#endif
+ /* flush instruction cache */
+ fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
-/* generate a return */
- switch(ELF_ARCH) {
- case EM_386:
- fprintf(outfile, "*gen_code_ptr++ = 0xc3; /* ret */\n");
- break;
- case EM_PPC:
- fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x4e800020; /* blr */\n");
- break;
- case EM_S390:
- fprintf(outfile, "*((uint16_t *)gen_code_ptr)++ = 0x07fe; /* br %%r14 */\n");
- break;
- case EM_ALPHA:
- fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x6bfa8001; /* ret */\n");
- break;
- case EM_IA_64:
- fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x00840008; /* br.ret.sptk.many b0;; */\n");
- break;
- default:
- error("unknown ELF architecture");
- }
-
fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n");
fprintf(outfile, "}\n\n");
-/* generate gen_xxx functions */
-/* XXX: suppress the use of these functions to simplify code */
- for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
- const char *name;
- name = strtab + sym->st_name;
- if (strstart(name, OP_PREFIX, NULL)) {
- if (sym->st_shndx != (text_sec - shdr))
- error("invalid section for opcode (0x%x)", sym->st_shndx);
- gen_code(name, sym->st_value, sym->st_size, outfile,
- text, relocs, nb_relocs, reloc_sh_type, symtab, strtab, 0);
- }
- }
}
- close(fd);
return 0;
}
"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, do_print_enum;
+ int c, out_type;
const char *filename, *outfilename;
FILE *outfile;
outfilename = "out.c";
- do_print_enum = 0;
+ out_type = OUT_CODE;
for(;;) {
- c = getopt(argc, argv, "ho:c");
+ c = getopt(argc, argv, "ho:cg");
if (c == -1)
break;
switch(c) {
outfilename = optarg;
break;
case 'c':
- do_print_enum = 1;
+ out_type = OUT_INDEX_OP;
+ break;
+ case 'g':
+ out_type = OUT_GEN_OP;
break;
}
}
outfile = fopen(outfilename, "w");
if (!outfile)
error("could not open '%s'", outfilename);
- load_elf(filename, outfile, do_print_enum);
+
+ load_object(filename);
+ gen_file(outfile, out_type);
fclose(outfile);
return 0;
}
projects / mirror_qemu.git / blobdiff