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exec_save.c
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exec_save.c
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/*
Copyright (C) 2001-2008, Parrot Foundation.
$Id$
=head1 NAME
src/exec_save.c - Save object file in native format
=head1 DESCRIPTION
Save the C<Parrot_exec_objfile_t> to the native format.
=head2 Functions
=over 4
=cut
*/
/* HEADERIZER HFILE: none */
/* HEADERIZER STOP */
#include <parrot/parrot.h>
#include "parrot/exec.h"
#include "exec_save.h"
static void save_zero(FILE *fp);
static void save_int(FILE *fp, int i);
static void save_short(FILE *fp, short s);
static void save_struct(FILE *fp, void *sp, size_t size);
#ifdef EXEC_A_OUT
# include <a.out.h>
# include <link.h>
/*
=item C<void
Parrot_exec_save(PARROT_INTERP, Parrot_exec_objfile_t *obj, const char *file)>
Save the C<Parrot_exec_objfile_t> to C<file>.
=cut
*/
void
Parrot_exec_save(PARROT_INTERP, Parrot_exec_objfile_t *obj, const char *file)
{
FILE * const fp = fopen(file, "w");
int i;
struct exec header;
struct relocation_info rellocation;
struct nlist symlst;
header.a_midmag = 0x07018600;
header.a_text = obj->text.size;
header.a_data = obj->data.size;
header.a_bss = obj->bss.size;
header.a_syms = obj->symbol_count * sizeof (struct nlist);
header.a_entry = 0;
header.a_trsize = obj->text_rellocation_count
* sizeof (struct relocation_info);
header.a_drsize = obj->data_rellocation_count
* sizeof (struct relocation_info);
save_struct(fp, &header, sizeof (struct exec));
/* Text */
for (i = 0; i < obj->text.size; i++)
fprintf(fp, "%c", obj->text.code[i]);
/* Data */
for (i = 0; i < obj->data.size; i++)
fprintf(fp, "%c", obj->data.code[i]);
/* Text rellocations */
for (i = obj->text_rellocation_count - 1; i >= 0; i--) {
memset(&rellocation, 0, sizeof (struct relocation_info));
rellocation.r_address = obj->text_rellocation_table[i].offset;
rellocation.r_symbolnum = obj->text_rellocation_table[i].symbol_number;
switch (obj->text_rellocation_table[i].type) {
case RTYPE_FUNC:
rellocation.r_pcrel = 1;
rellocation.r_length = 2;
rellocation.r_extern = 1;
break;
case RTYPE_COM:
case RTYPE_DATA:
rellocation.r_length = 2;
rellocation.r_extern = 1;
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_EXEC_ERROR,
"Unknown text rellocation type: %d\n",
obj->text_rellocation_table[i].type);
break;
}
save_struct(fp, &rellocation, sizeof (struct relocation_info));
}
/* Symbol table */
for (i = 0; i < obj->symbol_count; i++) {
memset(&symlst, 0, sizeof (struct nlist));
symlst.n_un.n_strx = obj->symbol_table[i].offset_list;
switch (obj->symbol_table[i].type) {
case STYPE_FUNC:
symlst.n_type = N_EXT | N_TEXT;
symlst.n_other = AUX_FUNC;
break;
case STYPE_GDATA:
symlst.n_type = N_EXT | N_DATA;
symlst.n_other = AUX_OBJECT;
symlst.n_value = obj->symbol_table[i].value;
break;
case STYPE_COM:
symlst.n_type = N_EXT;
symlst.n_value = obj->symbol_table[i].value;
break;
case STYPE_UND:
symlst.n_type = N_EXT;
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_EXEC_ERROR,
"Unknown symbol type: %d\n", obj->symbol_table[i].type);
break;
}
save_struct(fp, &symlst, sizeof (struct nlist));
}
/* String table size */
save_int(fp, obj->symbol_list_size);
/* String table */
for (i = 0; i < obj->symbol_count; i++) {
if (obj->symbol_table[i].type != STYPE_GCC)
fprintf(fp, "_%s", obj->symbol_table[i].symbol);
else
fprintf(fp, "%s", obj->symbol_table[i].symbol);
save_zero(fp);
}
fclose(fp);
}
#endif /* EXEC_A_OUT */
#ifdef EXEC_ELF
# ifdef PARROT_EXEC_OS_OPENBSD
# define R_386_32 1
# define R_386_PC32 2
# include <elf_abi.h>
# else
# include <elf.h>
# endif
# if defined(PARROT_PPC)
# if !defined(R_PPC_ADDR16_HI) && !defined(R_PPC_ADDR16_LO) && \
defined(R_PPC_16_HI) && defined(R_PPC_16_LO)
# define R_PPC_ADDR16_HI R_PPC_16_HI
# define R_PPC_ADDR16_LO R_PPC_16_LO
# endif
/*
* NetBSD/powerpc 3.x and OpenBSD/powerpc doesn't define these constants,
* but instead has them as enums, so add some workarounds for those.
*/
# if !defined(R_PPC_ADDR16_HI) && !defined(R_PPC_ADDR16_LO) && \
(defined(__NetBSD__) || defined(__OpenBSD__))
# define R_PPC_ADDR16_HI RELOC_16_HI
# define R_PPC_ADDR16_LO RELOC_16_LO
# endif
# if !defined(R_PPC_REL24) && (defined(__NetBSD__) || defined(__OpenBSD__))
# define R_PPC_REL24 RELOC_REL24
# endif
# endif /* PARROT_PPC */
/* Add a section to the file
*
* n = Name
* t = Type
* f = Flags
* s = Size
* l = Link
* i = Info
* a = Align
* e = Entry size
*/
# define sh_add(n, t, f, s, l, i, a, e) { \
memset(&sechdr, 0, sizeof (Elf32_Shdr)); \
sechdr.sh_name = shste - shst; \
shste += sprintf(shste, "%s", (n)); \
shste++; \
sechdr.sh_type = (t); \
sechdr.sh_flags = (f); \
sechdr.sh_addr = 0; \
sechdr.sh_offset = current_offset; \
sechdr.sh_size = (s); \
sechdr.sh_link = (l); \
sechdr.sh_info = (i); \
sechdr.sh_addralign = (a); \
sechdr.sh_entsize = (e); \
save_struct(fp, &sechdr, sizeof (Elf32_Shdr)); \
current_offset += (s); \
if ((s) % 4) \
current_offset += (4 - (s) % 4); \
}
/* Sizeof the section header string table */
# define SHSTRTABSIZE 0x48
/* Previously defined symbols (zero, text, data, bss) */
# define PDFS 4
/* Number of sections */
# define NSECTIONS 8
void
Parrot_exec_save(PARROT_INTERP, Parrot_exec_objfile_t *obj, const char *file)
{
FILE *fp = fopen(file, "w");
char *shste;
char shst[SHSTRTABSIZE];
Elf32_Ehdr header;
Elf32_Shdr sechdr;
Elf32_Rel rellocation;
Elf32_Rela rel_addend;
Elf32_Sym symlst;
Elf32_Off current_offset;
int i;
memset(&header, 0, sizeof (Elf32_Ehdr));
header.e_ident[0] = ELFMAG0;
header.e_ident[1] = ELFMAG1;
header.e_ident[2] = ELFMAG2;
header.e_ident[3] = ELFMAG3;
header.e_ident[4] = ELFCLASS32;
# if PARROT_BIGENDIAN
header.e_ident[5] = ELFDATA2MSB;
# else /* PARROT_BIGENDIAN */
header.e_ident[5] = ELFDATA2LSB;
# endif /* PARROT_BIGENDIAN */
header.e_ident[6] = EV_CURRENT;
# ifdef PARROT_EXEC_OS_FREEBSD
header.e_ident[7] = ELFOSABI_FREEBSD;
# endif
# ifdef PARROT_EXEC_OS_NETBSD
header.e_ident[7] = ELFOSABI_NETBSD;
# endif
# if defined(PARROT_EXEC_OS_LINUX) && defined(ELFOSABI_LINUX) && \
!defined(PARROT_PPC) && !defined(PARROT_ARM)
header.e_ident[7] = ELFOSABI_LINUX;
# endif
header.e_type = ET_REL;
# ifdef PARROT_I386
header.e_machine = EM_386;
# endif
# ifdef PARROT_PPC
header.e_machine = EM_PPC;
# endif
# ifdef PARROT_ARM
header.e_ident[7] = ELFOSABI_ARM;
header.e_machine = EM_ARM;
# endif
header.e_version = EV_CURRENT;
header.e_entry = 0;
header.e_phoff = 0;
header.e_shoff = sizeof (Elf32_Ehdr);
header.e_flags = 0;
header.e_ehsize = sizeof (Elf32_Ehdr);
header.e_phentsize = 0;
header.e_phnum = 0;
header.e_shentsize = sizeof (Elf32_Shdr);
header.e_shnum = NSECTIONS;
header.e_shstrndx = 1;
save_struct(fp, &header, sizeof (Elf32_Ehdr));
current_offset = sizeof (Elf32_Ehdr) + NSECTIONS * sizeof (Elf32_Shdr);
/* Sections */
memset(&shst, 0, SHSTRTABSIZE);
shste = shst + 1;
/* NULL */
memset(&sechdr, 0, sizeof (Elf32_Shdr));
save_struct(fp, &sechdr, sizeof (Elf32_Shdr));
/* Section Header String Table */
sh_add(".shstrtab", SHT_STRTAB, 0, SHSTRTABSIZE, 0, 0, 1, 0);
/* Text */
sh_add(".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR, obj->text.size,
0, 0, 4, 0);
/* Data */
sh_add(".data", SHT_PROGBITS, SHF_WRITE | SHF_ALLOC, obj->data.size,
0, 0, 4, 0);
/* Bss */
sh_add(".bss", SHT_NOBITS, SHF_WRITE | SHF_ALLOC, obj->bss.size,
0, 0, 4, 0);
/*
* Text rellocation records.
* Link must be the symtab section header index.
* Info is the text section header index.
*/
# if defined(PARROT_I386) || defined(PARROT_ARM)
sh_add(".rel.text", SHT_REL, 0, obj->text_rellocation_count *
sizeof (Elf32_Rel), 6, 2, 4, sizeof (Elf32_Rel));
# endif
/*
* PPC requires rellocation structures with addends.
*/
# ifdef PARROT_PPC
sh_add(".rela.text", SHT_RELA, 0, obj->text_rellocation_count *
sizeof (Elf32_Rela), 6, 2, 4, sizeof (Elf32_Rela));
# endif
/*
* Symbol table.
* Link is the strtab section header index.
* Info is the index of the first symbol in the symbol table.
*/
sh_add(".symtab", SHT_SYMTAB, 0, (obj->symbol_count + PDFS) *
sizeof (Elf32_Sym), 7, PDFS - 1, 4, sizeof (Elf32_Sym));
/* String Table */
obj->symbol_list_size += 1; /* Trailing \0 */
sh_add(".strtab", SHT_STRTAB, 0, obj->symbol_list_size, 0, 0, 1, 0);
/* Section header string table */
save_struct(fp, &shst, SHSTRTABSIZE);
save_struct(fp, obj->text.code, obj->text.size); /* Text */
save_struct(fp, obj->data.code, obj->data.size); /* Data */
/* Text rellocations */
for (i = 0; i < obj->text_rellocation_count; i++) {
# ifdef PARROT_I386
memset(&rellocation, 0, sizeof (Elf32_Rel));
rellocation.r_offset = obj->text_rellocation_table[i].offset;
switch (obj->text_rellocation_table[i].type) {
case RTYPE_FUNC:
rellocation.r_info =
ELF32_R_INFO(
obj->text_rellocation_table[i].symbol_number + PDFS,
R_386_PC32);
break;
case RTYPE_DATA:
case RTYPE_COM:
rellocation.r_info =
ELF32_R_INFO(
obj->text_rellocation_table[i].symbol_number + PDFS,
R_386_32);
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_EXEC_ERROR,
"Unknown text rellocation type: %d\n",
obj->text_rellocation_table[i].type);
break;
}
save_struct(fp, &rellocation, sizeof (Elf32_Rel));
# endif
# ifdef PARROT_PPC
memset(&rel_addend, 0, sizeof (Elf32_Rela));
rel_addend.r_offset = obj->text_rellocation_table[i].offset;
switch (obj->text_rellocation_table[i].type) {
case RTYPE_FUNC:
rel_addend.r_info =
ELF32_R_INFO(
obj->text_rellocation_table[i].symbol_number + PDFS,
R_PPC_REL24);
break;
case RTYPE_DATA:
case RTYPE_COM:
rel_addend.r_info =
ELF32_R_INFO(
obj->text_rellocation_table[i].symbol_number + PDFS,
R_PPC_ADDR16_HI);
rel_addend.r_addend = *((short *)
(&obj->text.code[obj->text_rellocation_table[i].offset]))
<< 16;
rel_addend.r_addend += *((short *)
(&obj->text.code[
obj->text_rellocation_table[i].offset + 4]));
break;
case RTYPE_DATA1:
rel_addend.r_info =
ELF32_R_INFO(
obj->text_rellocation_table[i].symbol_number + PDFS,
R_PPC_ADDR16_LO);
rel_addend.r_addend = *((short *)
(&obj->text.code[obj->text_rellocation_table[i].offset]));
rel_addend.r_addend += *((short *)
(&obj->text.code[
obj->text_rellocation_table[i].offset - 4])) << 16;
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_EXEC_ERROR,
"Unknown text rellocation type: %d\n",
obj->text_rellocation_table[i].type);
break;
}
save_struct(fp, &rel_addend, sizeof (Elf32_Rela));
# endif
# ifdef PARROT_ARM
memset(&rellocation, 0, sizeof (Elf32_Rel));
rellocation.r_offset = obj->text_rellocation_table[i].offset;
switch (obj->text_rellocation_table[i].type) {
case RTYPE_FUNC:
rellocation.r_info =
ELF32_R_INFO(
obj->text_rellocation_table[i].symbol_number + PDFS,
R_ARM_ABS32);
break;
case RTYPE_DATA:
rellocation.r_info =
ELF32_R_INFO(
obj->text_rellocation_table[i].symbol_number + PDFS,
R_ARM_ABS32);
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_EXEC_ERROR,
"Unknown text rellocation type: %d\n",
obj->text_rellocation_table[i].type);
break;
}
save_struct(fp, &rellocation, sizeof (Elf32_Rel));
# endif
}
/* Symbol table */
/* zero */
memset(&symlst, 0, sizeof (Elf32_Sym));
save_struct(fp, &symlst, sizeof (Elf32_Sym));
/* Text */
memset(&symlst, 0, sizeof (Elf32_Sym));
symlst.st_info = ELF32_ST_INFO(STB_LOCAL, STT_SECTION);
symlst.st_shndx = 2;
save_struct(fp, &symlst, sizeof (Elf32_Sym));
/* Data */
memset(&symlst, 0, sizeof (Elf32_Sym));
symlst.st_info = ELF32_ST_INFO(STB_LOCAL, STT_SECTION);
symlst.st_shndx = 3;
save_struct(fp, &symlst, sizeof (Elf32_Sym));
/* Bss */
memset(&symlst, 0, sizeof (Elf32_Sym));
symlst.st_info = ELF32_ST_INFO(STB_LOCAL, STT_SECTION);
symlst.st_shndx = 4;
save_struct(fp, &symlst, sizeof (Elf32_Sym));
for (i = 0; i < obj->symbol_count; i++) {
memset(&symlst, 0, sizeof (Elf32_Sym));
symlst.st_name = obj->symbol_table[i].offset_list + 1;
switch (obj->symbol_table[i].type) {
case STYPE_FUNC:
symlst.st_info = ELF32_ST_INFO(STB_GLOBAL, STT_FUNC);
symlst.st_size = obj->text.size;
symlst.st_shndx = 2; /* text */
break;
case STYPE_GDATA:
symlst.st_value = obj->symbol_table[i].value;
symlst.st_size = obj->data_size[i];
symlst.st_info = ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT);
symlst.st_shndx = 3; /* data */
break;
case STYPE_COM:
symlst.st_value = obj->symbol_table[i].value;
/* symlst.st_size = obj->data_size[i]; XXX daniel why? */
symlst.st_info = ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT);
symlst.st_shndx = SHN_COMMON;
break;
case STYPE_UND:
symlst.st_info = ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE);
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_EXEC_ERROR,
"Unknown symbol type: %d\n", obj->symbol_table[i].type);
break;
}
save_struct(fp, &symlst, sizeof (Elf32_Sym));
}
/* String table */
save_zero(fp);
for (i = 0; i < obj->symbol_count; i++) {
fprintf(fp, "%s", obj->symbol_table[i].symbol);
save_zero(fp);
}
/* PAD */
for (i = 0; i < (4 - obj->symbol_list_size % 4); i++)
save_zero(fp);
fclose(fp);
}
#endif /* EXEC_ELF */
#ifdef EXEC_MACH_O
void
Parrot_exec_save(PARROT_INTERP, Parrot_exec_objfile_t *obj, const char *file)
{
FILE *fp = fopen(file, "w");
size_t i;
fprintf(fp, "\xFE\xED\xFA\xCE"); /* Header for Darwin */
save_int(fp, 0x12);
save_int(fp, 0);
save_int(fp, 0x1);
save_int(fp, 0x3);
save_int(fp, 0x128);
save_int(fp, 0);
save_int(fp, 0x1);
save_int(fp, 0xC0);
for (i = 0; i < 5; i++)
save_int(fp, 0);
/* Sizeof text + data */
save_int(fp, obj->text.size + obj->data.size);
/* Offset of text */
save_int(fp, 0x144);
save_int(fp, obj->text.size + obj->data.size);
save_int(fp, 0x7);
save_int(fp, 0x7);
save_int(fp, 0x2);
save_int(fp, 0);
fprintf(fp, "__text");
for (i = 0; i < 10; i++)
save_zero(fp);
fprintf(fp, "__TEXT");
for (i = 0; i < 10; i++)
save_zero(fp);
save_int(fp, 0);
/* Sizeof text */
save_int(fp, obj->text.size);
save_int(fp, 0x144);
save_int(fp, 0x2);
/* Offset of rellocation table. */
save_int(fp, 0x144 + obj->text.size + obj->data.size);
save_int(fp, obj->text_rellocation_count);
save_int(fp, 0x80000400);
save_int(fp, 0);
save_int(fp, 0);
fprintf(fp, "__data");
for (i = 0; i < 10; i++)
save_zero(fp);
fprintf(fp, "__DATA");
for (i = 0; i < 10; i++)
save_zero(fp);
/* Data VMA */
save_int(fp, obj->text.size);
/* Data size */
save_int(fp, obj->data.size);
/* Data file offset */
save_int(fp, 0x144 + obj->text.size);
save_int(fp, 0x2);
for (i = 0; i < 5; i++)
save_int(fp, 0);
save_int(fp, 0x2);
/* save_int(fp, obj->symbol_count * 0xc); */
save_int(fp, 0x18);
/* Offset of stabs */
save_int(fp, 0x144 +
obj->text.size + obj->data.size + obj->text_rellocation_count * 0x8);
/* Number of stabs (symbol table) */
save_int(fp, obj->symbol_count);
/* Offset of symbol list */
save_int(fp, 0x144 + obj->text.size + obj->data.size +
obj->text_rellocation_count * 0x8 + obj->symbol_count * 0xc);
/* Sizeof symbol list */
save_int(fp, obj->symbol_list_size);
save_int(fp, 0xB);
save_int(fp, 0x50);
for (i = 0; i < 3; i++)
save_int(fp, 0);
save_int(fp, obj->symbol_count);
save_int(fp, obj->symbol_count);
for (i = 0; i < 13; i++)
save_int(fp, 0);
/* Text */
for (i = 0; i < obj->text.size; i++)
fprintf(fp, "%c", obj->text.code[i]);
/* Data */
for (i = 0; i < obj->data.size; i++)
fprintf(fp, "%c", obj->data.code[i]);
/* Text rellocations */
/* XXX This is an infinite loop. When i = 0, i-- goes to very large. */
for (i = obj->text_rellocation_count - 1; i >= 0; i--) {
save_int(fp, obj->text_rellocation_table[i].offset);
save_short(fp, obj->text_rellocation_table[i].symbol_number);
save_short(fp, obj->text_rellocation_table[i].type);
}
/* Symbol table */
for (i = 0; i < obj->symbol_count; i++) {
save_int(fp, obj->symbol_table[i].offset_list);
save_int(fp, obj->symbol_table[i].type);
save_int(fp, obj->symbol_table[i].value);
}
/* Symbol list */
for (i = 0; i < obj->symbol_count; i++) {
if (obj->symbol_table[i].type != STYPE_GCC)
fprintf(fp, "_%s", obj->symbol_table[i].symbol);
else
fprintf(fp, "%s", obj->symbol_table[i].symbol);
save_zero(fp);
}
fclose(fp);
}
#endif /* EXEC_MACH_O */
#ifdef EXEC_COFF
/* File offsets */
# define TEXT_CODE 0x14 + (3 * 0x28)
# define DATA_CODE TEXT_CODE + obj->text.size
# define TEXT_RELOC DATA_CODE + obj->data.size
# define DATA_RELOC TEXT_RELOC + (obj->text_rellocation_count * 0xA)
# define SYMTAB DATA_RELOC + (obj->data_rellocation_count * 0xA)
void
Parrot_exec_save(PARROT_INTERP, Parrot_exec_objfile_t *obj, const char *file)
{
FILE *fp;
int i;
size_t j;
fp = fopen(file, "wb");
save_short(fp, 0x14C); /* i386 */
save_short(fp, 3); /* Number of sections */
save_int(fp, Parrot_intval_time());
save_int(fp, SYMTAB);
save_int(fp, obj->symbol_count);
save_short(fp, 0);
save_short(fp, 0x104); /* 32 bit LE, no line numbers */
fwrite(".text\0\0\0", 8, 1, fp);
save_int(fp, 0);
save_int(fp, 0);
save_int(fp, obj->text.size);
save_int(fp, TEXT_CODE);
save_int(fp, TEXT_RELOC);
save_int(fp, 0);
save_short(fp, (short)obj->text_rellocation_count);
save_short(fp, 0);
save_int(fp, 0x20);
fwrite(".data\0\0\0", 8, 1, fp);
save_int(fp, 0);
save_int(fp, 0);
save_int(fp, obj->data.size);
save_int(fp, DATA_CODE);
save_int(fp, DATA_RELOC);
save_int(fp, 0);
save_short(fp, (short)obj->data_rellocation_count);
save_short(fp, 0);
save_int(fp, 0x40);
fwrite(".bss\0\0\0\0", 8, 1, fp);
save_int(fp, 0);
save_int(fp, 0);
save_int(fp, obj->bss.size);
save_int(fp, 0);
save_int(fp, 0);
save_int(fp, 0);
save_short(fp, 0);
save_short(fp, 0);
save_int(fp, 0x80);
/* Text */
for (j = 0; j < obj->text.size; j++)
fprintf(fp, "%c", obj->text.code[j]);
/* Data */
for (j = 0; j < obj->data.size; j++)
fprintf(fp, "%c", obj->data.code[j]);
/* Text rellocations */
for (i = 0; i < obj->text_rellocation_count; i++) {
save_int(fp, obj->text_rellocation_table[i].offset);
save_int(fp, obj->text_rellocation_table[i].symbol_number);
switch (obj->text_rellocation_table[i].type) {
case RTYPE_FUNC:
save_short(fp, 0x14);
break;
case RTYPE_COM:
case RTYPE_DATA:
save_short(fp, 0x06);
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_EXEC_ERROR,
"Unknown text rellocation type: %d\n",
obj->text_rellocation_table[i].type);
break;
}
}
/* Symbol table */
for (i = 0; i < obj->symbol_count; i++) {
save_int(fp, 0);
save_int(fp, obj->symbol_table[i].offset_list);
save_int(fp, obj->symbol_table[i].value);
switch (obj->symbol_table[i].type) {
case STYPE_FUNC:
save_short(fp, 1); /* .text */
save_short(fp, 0x20);
break;
case STYPE_GDATA:
save_short(fp, 2); /* .data */
save_short(fp, 0);
break;
case STYPE_COM:
save_short(fp, 0);
save_short(fp, 0);
break;
case STYPE_UND:
save_short(fp, 0);
save_short(fp, 0x20);
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_EXEC_ERROR,
"Unknown symbol type: %d\n", obj->symbol_table[i].type);
break;
}
putc(2, fp); /* "extern" class */
putc(0, fp);
}
/* Symbol list */
save_int(fp, obj->symbol_list_size);
for (i = 0; i < obj->symbol_count; i++) {
if (obj->symbol_table[i].type != STYPE_GCC)
fprintf(fp, "_%s", obj->symbol_table[i].symbol);
else
fprintf(fp, "%s", obj->symbol_table[i].symbol);
save_zero(fp);
}
fclose(fp);
}
#endif /* EXEC_COFF */
/*
=item C<static void save_struct(FILE *fp, void *sp, size_t size)>
Writes the C<struct> C<sp> to the file.
=cut
*/
static void
save_struct(FILE *fp, void *sp, size_t size)
{
unsigned int i;
for (i = 0; i < size; i++)
fprintf(fp, "%c", ((char *)sp)[i]);
}
/*
=item C<static void save_zero(FILE *fp)>
Writes 0 to the file.
=cut
*/
static void
save_zero(FILE *fp)
{
fprintf(fp, "%c", 0);
}
#if PARROT_BIGENDIAN
/*
=item C<static void save_int(FILE *fp, int i)>
Writes C<i> to the file.
=cut
*/
static void
save_int(FILE *fp, int i)
{
fprintf(fp, "%c%c%c%c", (char)(i >> 24), (char)(i >> 16),
(char)(i >> 8), (char)i);
}
/*
=item C<static void save_short(FILE *fp, short s)>
Writes C<s> to the file.
=cut
*/
static void
save_short(FILE *fp, short s)
{
fprintf(fp, "%c%c", (char)(s >> 8), (char)s);
}
#else /* PARROT_BIGENDIAN */
static void
save_short(FILE *fp, short s)
{
fprintf(fp, "%c%c", (char)s, (char)(s >> 8));
}
static void
save_int(FILE *fp, int i)
{
fprintf(fp, "%c%c%c%c", (char)i, (char)(i >> 8),
(char)(i >> 16), (char)(i >> 24));
}
#endif /* PARROT_BIGENDIAN */
/*
=back
=head1 SEE ALSO
F<include/parrot/exec.h>, F<src/exec_save.h>, F<src/exec.c>
and F<src/exec_start.c>.
=head1 HISTORY
Initial version by Daniel Grunblatt on 2003.6.9.
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/