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Clean tccelf.c

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- remove debug printf and commented out code
- remove C++-like comments
- remove whitespace at end of lines
- replace tabs by spaces
This commit is contained in:
Thomas Preud'homme 2013-12-17 20:59:14 +08:00
parent 6f3569e4e2
commit 3d4b57ffe3
1 changed files with 179 additions and 199 deletions

378
tccelf.c
View File

@ -1,6 +1,6 @@
/*
* ELF file handling for TCC
*
*
* Copyright (c) 2001-2004 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
@ -38,7 +38,7 @@ ST_FUNC int put_elf_str(Section *s, const char *sym)
static unsigned long elf_hash(const unsigned char *name)
{
unsigned long h = 0, g;
while (*name) {
h = (h << 4) + *name++;
g = h & 0xf0000000;
@ -91,7 +91,7 @@ ST_FUNC int put_elf_sym(Section *s, addr_t value, unsigned long size,
int nbuckets, h;
ElfW(Sym) *sym;
Section *hs;
sym = section_ptr_add(s, sizeof(ElfW(Sym)));
if (name)
name_offset = put_elf_str(s->link, name);
@ -139,7 +139,7 @@ ST_FUNC int find_elf_sym(Section *s, const char *name)
Section *hs;
int nbuckets, sym_index, h;
const char *name1;
hs = s->hash;
if (!hs)
return 0;
@ -198,7 +198,7 @@ ST_FUNC int add_elf_sym(Section *s, addr_t value, unsigned long size,
sym_bind = ELFW(ST_BIND)(info);
sym_type = ELFW(ST_TYPE)(info);
sym_vis = ELFW(ST_VISIBILITY)(other);
if (sym_bind != STB_LOCAL) {
/* we search global or weak symbols */
sym_index = find_elf_sym(s, name);
@ -257,8 +257,8 @@ ST_FUNC int add_elf_sym(Section *s, addr_t value, unsigned long size,
}
} else {
do_def:
sym_index = put_elf_sym(s, value, size,
ELFW(ST_INFO)(sym_bind, sym_type), other,
sym_index = put_elf_sym(s, value, size,
ELFW(ST_INFO)(sym_bind, sym_type), other,
sh_num, name);
}
return sym_index;
@ -311,11 +311,11 @@ ST_FUNC void put_stabs(const char *str, int type, int other, int desc,
sym->n_value = value;
}
ST_FUNC void put_stabs_r(const char *str, int type, int other, int desc,
ST_FUNC void put_stabs_r(const char *str, int type, int other, int desc,
unsigned long value, Section *sec, int sym_index)
{
put_stabs(str, type, other, desc, value);
put_elf_reloc(symtab_section, stab_section,
put_elf_reloc(symtab_section, stab_section,
stab_section->data_offset - sizeof(unsigned int),
R_DATA_32, sym_index);
}
@ -370,7 +370,7 @@ static void sort_syms(TCCState *s1, Section *s)
}
p++;
}
/* we copy the new symbols to the old */
memcpy(s->data, new_syms, nb_syms * sizeof(ElfW(Sym)));
tcc_free(new_syms);
@ -390,7 +390,7 @@ static void sort_syms(TCCState *s1, Section *s)
}
}
}
tcc_free(old_to_new_syms);
}
@ -588,13 +588,13 @@ ST_FUNC void relocate_section(TCCState *s1, Section *s)
case R_386_16:
if (s1->output_format != TCC_OUTPUT_FORMAT_BINARY) {
output_file:
tcc_error("can only produce 16-bit binary files");
tcc_error("can only produce 16-bit binary files");
}
*(short *)ptr += val;
break;
case R_386_PC16:
if (s1->output_format != TCC_OUTPUT_FORMAT_BINARY)
goto output_file;
goto output_file;
*(short *)ptr += val - addr;
break;
#elif defined(TCC_TARGET_ARM)
@ -642,7 +642,7 @@ ST_FUNC void relocate_section(TCCState *s1, Section *s)
guard its use */
case R_ARM_THM_PC22:
case R_ARM_THM_JUMP24:
{
{
int x, hi, lo, s, j1, j2, i1, i2, imm10, imm11;
int to_thumb, is_call, to_plt, blx_bit = 1 << 12;
Section *plt;
@ -720,7 +720,7 @@ ST_FUNC void relocate_section(TCCState *s1, Section *s)
*(int *)ptr |= x;
else
*(int *)ptr += x;
}
}
break;
case R_ARM_THM_MOVT_ABS:
case R_ARM_THM_MOVW_ABS_NC:
@ -737,7 +737,7 @@ ST_FUNC void relocate_section(TCCState *s1, Section *s)
*(int *)ptr |= x;
else
*(int *)ptr += x;
}
}
break;
case R_ARM_PREL31:
{
@ -784,15 +784,15 @@ ST_FUNC void relocate_section(TCCState *s1, Section *s)
case R_C60LO16:
{
uint32_t orig;
/* put the low 16 bits of the absolute address */
// add to what is already there
/* put the low 16 bits of the absolute address
add to what is already there */
orig = ((*(int *)(ptr )) >> 7) & 0xffff;
orig |= (((*(int *)(ptr+4)) >> 7) & 0xffff) << 16;
//patch both at once - assumes always in pairs Low - High
/* patch both at once - assumes always in pairs Low - High */
*(int *) ptr = (*(int *) ptr & (~(0xffff << 7)) ) | (((val+orig) & 0xffff) << 7);
*(int *)(ptr+4) = (*(int *)(ptr+4) & (~(0xffff << 7)) ) | ((((val+orig)>>16) & 0xffff) << 7);
}
@ -990,7 +990,7 @@ static void build_got(TCCState *s1)
/* if no got, then create it */
s1->got = new_section(s1, ".got", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
s1->got->sh_entsize = 4;
add_elf_sym(symtab_section, 0, 4, ELFW(ST_INFO)(STB_GLOBAL, STT_OBJECT),
add_elf_sym(symtab_section, 0, 4, ELFW(ST_INFO)(STB_GLOBAL, STT_OBJECT),
0, s1->got->sh_num, "_GLOBAL_OFFSET_TABLE_");
ptr = section_ptr_add(s1->got, 3 * PTR_SIZE);
#if PTR_SIZE == 4
@ -1014,7 +1014,7 @@ static void build_got(TCCState *s1)
/* put a got entry corresponding to a symbol in symtab_section. 'size'
and 'info' can be modifed if more precise info comes from the DLL */
static void put_got_entry(TCCState *s1,
int reloc_type, unsigned long size, int info,
int reloc_type, unsigned long size, int info,
int sym_index)
{
int index;
@ -1092,7 +1092,7 @@ static void put_got_entry(TCCState *s1,
if (reloc_type == R_ARM_JUMP_SLOT) {
Section *plt;
uint8_t *p;
/* if we build a DLL, we add a %ebx offset */
if (s1->output_type == TCC_OUTPUT_DLL)
tcc_error("DLLs unimplemented!");
@ -1110,14 +1110,14 @@ static void put_got_entry(TCCState *s1,
if (s1->sym_attrs[sym_index].plt_thumb_stub) {
p = section_ptr_add(plt, 20);
put32(p , 0x4778); // bx pc
put32(p+2, 0x46c0); // nop
put32(p , 0x4778); /* bx pc */
put32(p+2, 0x46c0); /* nop */
p += 4;
} else
p = section_ptr_add(plt, 16);
put32(p , 0xe59fc004); // ldr ip, [pc, #4] // offset in GOT
put32(p+4, 0xe08fc00c); // add ip, pc, ip // absolute address or offset
put32(p+8, 0xe59cf000); // ldr pc, [ip] // load absolute address or load offset
put32(p , 0xe59fc004); /* ldr ip, [pc, #4] ; offset in GOT */
put32(p+4, 0xe08fc00c); /* add ip, pc, ip ; absolute address or offset */
put32(p+8, 0xe59cf000); /* ldr pc, [ip] ; load absolute address or load offset */
put32(p+12, s1->got->data_offset);
/* the symbol is modified so that it will be relocated to
@ -1130,11 +1130,11 @@ static void put_got_entry(TCCState *s1,
#else
#error unsupported CPU
#endif
index = put_elf_sym(s1->dynsym, offset,
index = put_elf_sym(s1->dynsym, offset,
size, info, 0, sym->st_shndx, name);
/* put a got entry */
put_elf_reloc(s1->dynsym, s1->got,
s1->got->data_offset,
put_elf_reloc(s1->dynsym, s1->got,
s1->got->data_offset,
reloc_type, index);
}
ptr = section_ptr_add(s1->got, PTR_SIZE);
@ -1177,7 +1177,7 @@ ST_FUNC void build_got_entries(TCCState *s1)
reloc_type = R_386_GLOB_DAT;
else
reloc_type = R_386_JMP_SLOT;
put_got_entry(s1, reloc_type, sym->st_size, sym->st_info,
put_got_entry(s1, reloc_type, sym->st_size, sym->st_info,
sym_index);
}
break;
@ -1196,7 +1196,7 @@ ST_FUNC void build_got_entries(TCCState *s1)
reloc_type = R_ARM_GLOB_DAT;
else
reloc_type = R_ARM_JUMP_SLOT;
put_got_entry(s1, reloc_type, sym->st_size, sym->st_info,
put_got_entry(s1, reloc_type, sym->st_size, sym->st_info,
sym_index);
}
break;
@ -1215,7 +1215,7 @@ ST_FUNC void build_got_entries(TCCState *s1)
reloc_type = R_C60_GLOB_DAT;
else
reloc_type = R_C60_JMP_SLOT;
put_got_entry(s1, reloc_type, sym->st_size, sym->st_info,
put_got_entry(s1, reloc_type, sym->st_size, sym->st_info,
sym_index);
}
break;
@ -1235,7 +1235,7 @@ ST_FUNC void build_got_entries(TCCState *s1)
reloc_type = R_X86_64_GLOB_DAT;
else
reloc_type = R_X86_64_JUMP_SLOT;
put_got_entry(s1, reloc_type, sym->st_size, sym->st_info,
put_got_entry(s1, reloc_type, sym->st_size, sym->st_info,
sym_index);
}
break;
@ -1251,7 +1251,7 @@ ST_FUNC void build_got_entries(TCCState *s1)
ST_FUNC Section *new_symtab(TCCState *s1,
const char *symtab_name, int sh_type, int sh_flags,
const char *strtab_name,
const char *strtab_name,
const char *hash_name, int hash_sh_flags)
{
Section *symtab, *strtab, *hash;
@ -1263,7 +1263,7 @@ ST_FUNC Section *new_symtab(TCCState *s1,
put_elf_str(strtab, "");
symtab->link = strtab;
put_elf_sym(symtab, 0, 0, 0, 0, 0, NULL);
nb_buckets = 1;
hash = new_section(s1, hash_name, SHT_HASH, hash_sh_flags);
@ -1293,7 +1293,7 @@ static void add_init_array_defines(TCCState *s1, const char *section_name)
long end_offset;
char sym_start[1024];
char sym_end[1024];
snprintf(sym_start, sizeof(sym_start), "__%s_start", section_name + 1);
snprintf(sym_end, sizeof(sym_end), "__%s_end", section_name + 1);
@ -1305,11 +1305,11 @@ static void add_init_array_defines(TCCState *s1, const char *section_name)
end_offset = s->data_offset;
}
add_elf_sym(symtab_section,
add_elf_sym(symtab_section,
0, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
s->sh_num, sym_start);
add_elf_sym(symtab_section,
add_elf_sym(symtab_section,
end_offset, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
s->sh_num, sym_end);
@ -1385,15 +1385,15 @@ ST_FUNC void tcc_add_linker_symbols(TCCState *s1)
int i;
Section *s;
add_elf_sym(symtab_section,
add_elf_sym(symtab_section,
text_section->data_offset, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
text_section->sh_num, "_etext");
add_elf_sym(symtab_section,
add_elf_sym(symtab_section,
data_section->data_offset, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
data_section->sh_num, "_edata");
add_elf_sym(symtab_section,
add_elf_sym(symtab_section,
bss_section->data_offset, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
bss_section->sh_num, "_end");
@ -1401,7 +1401,7 @@ ST_FUNC void tcc_add_linker_symbols(TCCState *s1)
add_init_array_defines(s1, ".preinit_array");
add_init_array_defines(s1, ".init_array");
add_init_array_defines(s1, ".fini_array");
/* add start and stop symbols for sections whose name can be
expressed in C */
for(i = 1; i < s1->nb_sections; i++) {
@ -1422,7 +1422,7 @@ ST_FUNC void tcc_add_linker_symbols(TCCState *s1)
p++;
}
snprintf(buf, sizeof(buf), "__start_%s", s->name);
add_elf_sym(symtab_section,
add_elf_sym(symtab_section,
0, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
s->sh_num, buf);
@ -1459,8 +1459,8 @@ static void tcc_output_binary(TCCState *s1, FILE *f,
}
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#define HAVE_PHDR 1
#define EXTRA_RELITEMS 14
#define HAVE_PHDR 1
#define EXTRA_RELITEMS 14
/* move the relocation value from .dynsym to .got */
void patch_dynsym_undef(TCCState *s1, Section *s)
@ -1468,19 +1468,19 @@ void patch_dynsym_undef(TCCState *s1, Section *s)
uint32_t *gotd = (void *)s1->got->data;
ElfW(Sym) *sym, *sym_end;
gotd += 3; // dummy entries in .got
gotd += 3; /* dummy entries in .got */
/* relocate symbols in .dynsym */
sym_end = (ElfW(Sym) *)(s->data + s->data_offset);
for (sym = (ElfW(Sym) *)s->data + 1; sym < sym_end; sym++) {
if (sym->st_shndx == SHN_UNDEF) {
*gotd++ = sym->st_value + 6; // XXX 6 is magic ?
sym->st_value = 0;
}
if (sym->st_shndx == SHN_UNDEF) {
*gotd++ = sym->st_value + 6; /* XXX 6 is magic ? */
sym->st_value = 0;
}
}
}
#else
#define HAVE_PHDR 0
#define EXTRA_RELITEMS 9
#define HAVE_PHDR 0
#define EXTRA_RELITEMS 9
/* zero plt offsets of weak symbols in .dynsym */
void patch_dynsym_undef(TCCState *s1, Section *s)
@ -1496,45 +1496,45 @@ void patch_dynsym_undef(TCCState *s1, Section *s)
ST_FUNC void fill_got_entry(TCCState *s1, ElfW_Rel *rel)
{
int sym_index = ELFW(R_SYM) (rel->r_info);
ElfW(Sym) *sym = &((ElfW(Sym) *) symtab_section->data)[sym_index];
unsigned long offset;
int sym_index = ELFW(R_SYM) (rel->r_info);
ElfW(Sym) *sym = &((ElfW(Sym) *) symtab_section->data)[sym_index];
unsigned long offset;
if (sym_index >= s1->nb_sym_attrs)
return;
offset = s1->sym_attrs[sym_index].got_offset;
section_reserve(s1->got, offset + PTR_SIZE);
if (sym_index >= s1->nb_sym_attrs)
return;
offset = s1->sym_attrs[sym_index].got_offset;
section_reserve(s1->got, offset + PTR_SIZE);
#ifdef TCC_TARGET_X86_64
/* only works for x86-64 */
put32(s1->got->data + offset + 4, sym->st_value >> 32);
/* only works for x86-64 */
put32(s1->got->data + offset + 4, sym->st_value >> 32);
#endif
put32(s1->got->data + offset, sym->st_value & 0xffffffff);
put32(s1->got->data + offset, sym->st_value & 0xffffffff);
}
ST_FUNC void fill_got(TCCState *s1)
{
Section *s;
ElfW_Rel *rel, *rel_end;
int i;
Section *s;
ElfW_Rel *rel, *rel_end;
int i;
for(i = 1; i < s1->nb_sections; i++) {
s = s1->sections[i];
if (s->sh_type != SHT_RELX)
continue;
/* no need to handle got relocations */
if (s->link != symtab_section)
continue;
rel_end = (ElfW_Rel *) (s->data + s->data_offset);
for(rel = (ElfW_Rel *) s->data; rel < rel_end; rel++) {
switch (ELFW(R_TYPE) (rel->r_info)) {
case R_X86_64_GOT32:
case R_X86_64_GOTPCREL:
case R_X86_64_PLT32:
fill_got_entry(s1, rel);
break;
}
}
}
for(i = 1; i < s1->nb_sections; i++) {
s = s1->sections[i];
if (s->sh_type != SHT_RELX)
continue;
/* no need to handle got relocations */
if (s->link != symtab_section)
continue;
rel_end = (ElfW_Rel *) (s->data + s->data_offset);
for(rel = (ElfW_Rel *) s->data; rel < rel_end; rel++) {
switch (ELFW(R_TYPE) (rel->r_info)) {
case R_X86_64_GOT32:
case R_X86_64_GOTPCREL:
case R_X86_64_PLT32:
fill_got_entry(s1, rel);
break;
}
}
}
}
@ -1574,7 +1574,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
dynamic = NULL;
dynstr = NULL; /* avoid warning */
saved_dynamic_data_offset = 0; /* avoid warning */
if (file_type != TCC_OUTPUT_OBJ) {
relocate_common_syms();
@ -1587,10 +1587,10 @@ static int elf_output_file(TCCState *s1, const char *filename)
if (file_type == TCC_OUTPUT_EXE) {
char *ptr;
/* allow override the dynamic loader */
const char *elfint = getenv("LD_SO");
if (elfint == NULL)
elfint = DEFAULT_ELFINTERP(s1);
/* allow override the dynamic loader */
const char *elfint = getenv("LD_SO");
if (elfint == NULL)
elfint = DEFAULT_ELFINTERP(s1);
/* add interpreter section only if executable */
interp = new_section(s1, ".interp", SHT_PROGBITS, SHF_ALLOC);
interp->sh_addralign = 1;
@ -1600,18 +1600,18 @@ static int elf_output_file(TCCState *s1, const char *filename)
/* add dynamic symbol table */
s1->dynsym = new_symtab(s1, ".dynsym", SHT_DYNSYM, SHF_ALLOC,
".dynstr",
".dynstr",
".hash", SHF_ALLOC);
dynstr = s1->dynsym->link;
/* add dynamic section */
dynamic = new_section(s1, ".dynamic", SHT_DYNAMIC,
dynamic = new_section(s1, ".dynamic", SHT_DYNAMIC,
SHF_ALLOC | SHF_WRITE);
dynamic->link = dynstr;
dynamic->sh_entsize = sizeof(ElfW(Dyn));
/* add PLT */
s1->plt = new_section(s1, ".plt", SHT_PROGBITS,
s1->plt = new_section(s1, ".plt", SHT_PROGBITS,
SHF_ALLOC | SHF_EXECINSTR);
s1->plt->sh_entsize = 4;
@ -1643,7 +1643,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
* function wanted by the caller of dlsym
* instead of the address of the function that
* would return that address */
put_got_entry(s1, R_JMP_SLOT, esym->st_size,
put_got_entry(s1, R_JMP_SLOT, esym->st_size,
ELFW(ST_INFO)(STB_GLOBAL,STT_FUNC),
sym - (ElfW(Sym) *)symtab_section->data);
} else if (type == STT_OBJECT) {
@ -1652,10 +1652,10 @@ static int elf_output_file(TCCState *s1, const char *filename)
offset = bss_section->data_offset;
/* XXX: which alignment ? */
offset = (offset + 16 - 1) & -16;
index = put_elf_sym(s1->dynsym, offset, esym->st_size,
esym->st_info, 0,
index = put_elf_sym(s1->dynsym, offset, esym->st_size,
esym->st_info, 0,
bss_section->sh_num, name);
// Ensure R_COPY works for weak symbol aliases
/* Ensure R_COPY works for weak symbol aliases */
if (ELFW(ST_BIND)(esym->st_info) == STB_WEAK) {
dynsym_end = (ElfW(Sym) *)
(s1->dynsymtab_section->data +
@ -1676,7 +1676,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
}
}
}
put_elf_reloc(s1->dynsym, bss_section,
put_elf_reloc(s1->dynsym, bss_section,
offset, R_COPY, index);
offset += esym->st_size;
bss_section->data_offset = offset;
@ -1691,17 +1691,17 @@ static int elf_output_file(TCCState *s1, const char *filename)
tcc_error_noabort("undefined symbol '%s'", name);
}
}
} else if (s1->rdynamic &&
} else if (s1->rdynamic &&
ELFW(ST_BIND)(sym->st_info) != STB_LOCAL) {
/* if -rdynamic option, then export all non
local symbols */
name = symtab_section->link->data + sym->st_name;
put_elf_sym(s1->dynsym, sym->st_value, sym->st_size,
sym->st_info, 0,
put_elf_sym(s1->dynsym, sym->st_value, sym->st_size,
sym->st_info, 0,
sym->st_shndx, name);
}
}
if (s1->nb_errors)
goto fail;
@ -1719,8 +1719,8 @@ static int elf_output_file(TCCState *s1, const char *filename)
/* XXX: avoid adding a symbol if already
present because of -rdynamic ? */
sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
put_elf_sym(s1->dynsym, sym->st_value, sym->st_size,
sym->st_info, 0,
put_elf_sym(s1->dynsym, sym->st_value, sym->st_size,
sym->st_info, 0,
sym->st_shndx, name);
} else {
if (ELFW(ST_BIND)(esym->st_info) == STB_WEAK) {
@ -1745,24 +1745,24 @@ static int elf_output_file(TCCState *s1, const char *filename)
ELFW(ST_TYPE)(sym->st_info) == STT_GNU_IFUNC)
&& sym->st_shndx == SHN_UNDEF) {
int visibility = ELFW(ST_BIND)(sym->st_info);
put_got_entry(s1, R_JMP_SLOT, sym->st_size,
put_got_entry(s1, R_JMP_SLOT, sym->st_size,
ELFW(ST_INFO)(visibility,STT_FUNC),
sym - (ElfW(Sym) *)symtab_section->data);
}
else if (ELFW(ST_TYPE)(sym->st_info) == STT_OBJECT) {
put_got_entry(s1, R_X86_64_GLOB_DAT, sym->st_size,
sym->st_info,
put_got_entry(s1, R_X86_64_GLOB_DAT, sym->st_size,
sym->st_info,
sym - (ElfW(Sym) *)symtab_section->data);
}
else
#endif
{
name = symtab_section->link->data + sym->st_name;
index = put_elf_sym(s1->dynsym, sym->st_value, sym->st_size,
sym->st_info, 0,
index = put_elf_sym(s1->dynsym, sym->st_value, sym->st_size,
sym->st_info, 0,
sym->st_shndx, name);
s1->symtab_to_dynsym[sym -
(ElfW(Sym) *)symtab_section->data] =
s1->symtab_to_dynsym[sym -
(ElfW(Sym) *)symtab_section->data] =
index;
}
}
@ -1770,7 +1770,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
}
build_got_entries(s1);
/* add a list of needed dlls */
for(i = 0; i < s1->nb_loaded_dlls; i++) {
DLLReference *dllref = s1->loaded_dlls[i];
@ -1806,7 +1806,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
/* we add a section for symbols */
strsec = new_section(s1, ".shstrtab", SHT_STRTAB, 0);
put_elf_str(strsec, "");
/* compute number of sections */
shnum = s1->nb_sections;
@ -1814,7 +1814,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
section_order = tcc_malloc(sizeof(int) * shnum);
section_order[0] = 0;
sh_order_index = 1;
/* compute number of program headers */
switch(file_type) {
default:
@ -1839,27 +1839,18 @@ static int elf_output_file(TCCState *s1, const char *filename)
for(i = 1; i < s1->nb_sections; i++) {
s = s1->sections[i];
s->sh_name = put_elf_str(strsec, s->name);
#if 0 /* gr */
printf("section: f=%08x t=%08x i=%08x %s %s\n",
s->sh_flags,
s->sh_type,
s->sh_info,
s->name,
s->reloc ? s->reloc->name : "n"
);
#endif
/* when generating a DLL, we include relocations but we may
patch them */
if (file_type == TCC_OUTPUT_DLL &&
s->sh_type == SHT_RELX &&
if (file_type == TCC_OUTPUT_DLL &&
s->sh_type == SHT_RELX &&
!(s->sh_flags & SHF_ALLOC)) {
/* //gr: avoid bogus relocs for empty (debug) sections */
/* gr: avoid bogus relocs for empty (debug) sections */
if (s1->sections[s->sh_info]->sh_flags & SHF_ALLOC)
prepare_dynamic_rel(s1, s);
else if (s1->do_debug)
s->sh_size = s->data_offset;
} else if (s1->do_debug ||
file_type == TCC_OUTPUT_OBJ ||
file_type == TCC_OUTPUT_OBJ ||
(s->sh_flags & SHF_ALLOC) ||
i == (s1->nb_sections - 1)) {
/* we output all sections if debug or object file */
@ -1869,7 +1860,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
/* allocate program segment headers */
phdr = tcc_mallocz(phnum * sizeof(ElfW(Phdr)));
if (s1->output_format == TCC_OUTPUT_FORMAT_ELF) {
file_offset = sizeof(ElfW(Ehdr)) + phnum * sizeof(ElfW(Phdr));
} else {
@ -1877,14 +1868,14 @@ static int elf_output_file(TCCState *s1, const char *filename)
}
if (phnum > 0) {
/* compute section to program header mapping */
if (s1->has_text_addr) {
if (s1->has_text_addr) {
int a_offset, p_offset;
addr = s1->text_addr;
/* we ensure that (addr % ELF_PAGE_SIZE) == file_offset %
ELF_PAGE_SIZE */
a_offset = (int) (addr & (s1->section_align - 1));
p_offset = file_offset & (s1->section_align - 1);
if (a_offset < p_offset)
if (a_offset < p_offset)
a_offset += s1->section_align;
file_offset += (a_offset - p_offset);
} else {
@ -1895,7 +1886,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
/* compute address after headers */
addr += (file_offset & (s1->section_align - 1));
}
/* dynamic relocation table information, for .dynamic section */
rel_size = 0;
rel_addr = 0;
@ -1915,7 +1906,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
else
ph->p_flags = PF_R | PF_W;
ph->p_align = s1->section_align;
/* we do the following ordering: interp, symbol tables,
relocations, progbits, nobits */
/* XXX: do faster and simpler sorting */
@ -1924,11 +1915,11 @@ static int elf_output_file(TCCState *s1, const char *filename)
s = s1->sections[i];
/* compute if section should be included */
if (j == 0) {
if ((s->sh_flags & (SHF_ALLOC | SHF_WRITE)) !=
if ((s->sh_flags & (SHF_ALLOC | SHF_WRITE)) !=
SHF_ALLOC)
continue;
} else {
if ((s->sh_flags & (SHF_ALLOC | SHF_WRITE)) !=
if ((s->sh_flags & (SHF_ALLOC | SHF_WRITE)) !=
(SHF_ALLOC | SHF_WRITE))
continue;
}
@ -1954,12 +1945,12 @@ static int elf_output_file(TCCState *s1, const char *filename)
/* section matches: we align it and add its size */
tmp = addr;
addr = (addr + s->sh_addralign - 1) &
addr = (addr + s->sh_addralign - 1) &
~(s->sh_addralign - 1);
file_offset += (int) ( addr - tmp );
s->sh_offset = file_offset;
s->sh_addr = addr;
/* update program header infos */
if (ph->p_offset == 0) {
ph->p_offset = file_offset;
@ -1969,14 +1960,14 @@ static int elf_output_file(TCCState *s1, const char *filename)
/* update dynamic relocation infos */
if (s->sh_type == SHT_RELX) {
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
if (!strcmp(strsec->data + s->sh_name, ".rel.got")) { // rel_size == 0) {
if (!strcmp(strsec->data + s->sh_name, ".rel.got")) {
rel_addr = addr;
rel_size += s->sh_size; // XXX only first rel.
}
if (!strcmp(strsec->data + s->sh_name, ".rel.bss")) { // rel_size == 0) {
rel_size += s->sh_size; /* XXX only first rel. */
}
if (!strcmp(strsec->data + s->sh_name, ".rel.bss")) {
bss_addr = addr;
bss_size = s->sh_size; // XXX only first rel.
}
bss_size = s->sh_size; /* XXX only first rel. */
}
#else
if (rel_size == 0)
rel_addr = addr;
@ -2010,18 +2001,18 @@ static int elf_output_file(TCCState *s1, const char *filename)
ph = &phdr[0];
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
{
int len = phnum * sizeof(ElfW(Phdr));
{
int len = phnum * sizeof(ElfW(Phdr));
ph->p_type = PT_PHDR;
ph->p_offset = sizeof(ElfW(Ehdr));
ph->p_vaddr = interp->sh_addr - len;
ph->p_paddr = ph->p_vaddr;
ph->p_filesz = ph->p_memsz = len;
ph->p_flags = PF_R | PF_X;
ph->p_align = 4; // interp->sh_addralign;
ph++;
}
ph->p_type = PT_PHDR;
ph->p_offset = sizeof(ElfW(Ehdr));
ph->p_vaddr = interp->sh_addr - len;
ph->p_paddr = ph->p_vaddr;
ph->p_filesz = ph->p_memsz = len;
ph->p_flags = PF_R | PF_X;
ph->p_align = 4; /* interp->sh_addralign; */
ph++;
}
#endif
ph->p_type = PT_INTERP;
@ -2033,13 +2024,13 @@ static int elf_output_file(TCCState *s1, const char *filename)
ph->p_flags = PF_R;
ph->p_align = interp->sh_addralign;
}
/* if dynamic section, then add corresponing program header */
if (dynamic) {
ElfW(Sym) *sym_end;
ph = &phdr[phnum - 1];
ph->p_type = PT_DYNAMIC;
ph->p_offset = dynamic->sh_offset;
ph->p_vaddr = dynamic->sh_addr;
@ -2155,14 +2146,14 @@ static int elf_output_file(TCCState *s1, const char *filename)
if (phnum > 0 && (s->sh_flags & SHF_ALLOC))
continue;
section_order[sh_order_index++] = i;
file_offset = (file_offset + s->sh_addralign - 1) &
file_offset = (file_offset + s->sh_addralign - 1) &
~(s->sh_addralign - 1);
s->sh_offset = file_offset;
if (s->sh_type != SHT_NOBITS)
file_offset += s->sh_size;
}
/* if building executable or DLL, then relocate each section
except the GOT which is already relocated */
if (file_type != TCC_OUTPUT_OBJ) {
@ -2207,7 +2198,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
else
mode = 0777;
unlink(filename);
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, mode);
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, mode);
if (fd < 0) {
tcc_error_noabort("could not write '%s'", filename);
goto fail;
@ -2223,10 +2214,10 @@ static int elf_output_file(TCCState *s1, const char *filename)
#endif
if (s1->output_format == TCC_OUTPUT_FORMAT_ELF) {
sort_syms(s1, symtab_section);
/* align to 4 */
file_offset = (file_offset + 3) & -4;
/* fill header */
ehdr.e_ident[0] = ELFMAG0;
ehdr.e_ident[1] = ELFMAG1;
@ -2271,7 +2262,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
ehdr.e_shentsize = sizeof(ElfW(Shdr));
ehdr.e_shnum = shnum;
ehdr.e_shstrndx = shnum - 1;
fwrite(&ehdr, 1, sizeof(ElfW(Ehdr)), f);
fwrite(phdr, 1, phnum * sizeof(ElfW(Phdr)), f);
offset = sizeof(ElfW(Ehdr)) + phnum * sizeof(ElfW(Phdr));
@ -2296,7 +2287,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
fputc(0, f);
offset++;
}
for(i=0;i<s1->nb_sections;i++) {
sh = &shdr;
memset(sh, 0, sizeof(ElfW(Shdr)));
@ -2363,9 +2354,9 @@ typedef struct SectionMergeInfo {
/* load an object file and merge it with current files */
/* XXX: handle correctly stab (debug) info */
ST_FUNC int tcc_load_object_file(TCCState *s1,
ST_FUNC int tcc_load_object_file(TCCState *s1,
int fd, unsigned long file_offset)
{
{
ElfW(Ehdr) ehdr;
ElfW(Shdr) *shdr, *sh;
int size, i, j, offset, offseti, nb_syms, sym_index, ret;
@ -2400,10 +2391,10 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
return -1;
}
/* read sections */
shdr = load_data(fd, file_offset + ehdr.e_shoff,
shdr = load_data(fd, file_offset + ehdr.e_shoff,
sizeof(ElfW(Shdr)) * ehdr.e_shnum);
sm_table = tcc_mallocz(sizeof(SectionMergeInfo) * ehdr.e_shnum);
/* load section names */
sh = &shdr[ehdr.e_shstrndx];
strsec = load_data(fd, file_offset + sh->sh_offset, sh->sh_size);
@ -2431,7 +2422,7 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
strtab = load_data(fd, file_offset + sh->sh_offset, sh->sh_size);
}
}
/* now examine each section and try to merge its content with the
ones in memory */
for(i = 1; i < ehdr.e_shnum; i++) {
@ -2442,11 +2433,11 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
sh_name = strsec + sh->sh_name;
/* ignore sections types we do not handle */
if (sh->sh_type != SHT_PROGBITS &&
sh->sh_type != SHT_RELX &&
sh->sh_type != SHT_RELX &&
#ifdef TCC_ARM_EABI
sh->sh_type != SHT_ARM_EXIDX &&
#endif
sh->sh_type != SHT_NOBITS &&
sh->sh_type != SHT_NOBITS &&
sh->sh_type != SHT_PREINIT_ARRAY &&
sh->sh_type != SHT_INIT_ARRAY &&
sh->sh_type != SHT_FINI_ARRAY &&
@ -2459,7 +2450,7 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
for(j = 1; j < s1->nb_sections;j++) {
s = s1->sections[j];
if (!strcmp(s->name, sh_name)) {
if (!strncmp(sh_name, ".gnu.linkonce",
if (!strncmp(sh_name, ".gnu.linkonce",
sizeof(".gnu.linkonce") - 1)) {
/* if a 'linkonce' section is already present, we
do not add it again. It is a little tricky as
@ -2518,7 +2509,7 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
next: ;
}
/* //gr relocate stab strings */
/* gr relocate stab strings */
if (stab_index && stabstr_index) {
Stab_Sym *a, *b;
unsigned o;
@ -2526,7 +2517,7 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
a = (Stab_Sym *)(s->data + sm_table[stab_index].offset);
b = (Stab_Sym *)(s->data + s->data_offset);
o = sm_table[stabstr_index].offset;
while (a < b)
while (a < b)
a->n_strx += o, a++;
}
@ -2577,8 +2568,8 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
}
/* add symbol */
name = strtab + sym->st_name;
sym_index = add_elf_sym(symtab_section, sym->st_value, sym->st_size,
sym->st_info, sym->st_other,
sym_index = add_elf_sym(symtab_section, sym->st_value, sym->st_size,
sym->st_info, sym->st_other,
sym->st_shndx, name);
old_to_new_syms[i] = sym_index;
}
@ -2639,7 +2630,7 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
break;
}
}
ret = 0;
the_end:
tcc_free(symtab);
@ -2690,9 +2681,6 @@ static int tcc_load_alacarte(TCCState *s1, int fd, int size)
sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
if(sym->st_shndx == SHN_UNDEF) {
off = get_be32(ar_index + i * 4) + sizeof(ArchiveHeader);
#if 0
printf("%5d\t%s\t%08x\n", i, p, sym->st_shndx);
#endif
++bound;
lseek(fd, off, SEEK_SET);
if(tcc_load_object_file(s1, fd, off) < 0) {
@ -2722,7 +2710,7 @@ ST_FUNC int tcc_load_archive(TCCState *s1, int fd)
/* skip magic which was already checked */
read(fd, magic, sizeof(magic));
for(;;) {
len = read(fd, &hdr, sizeof(hdr));
if (len == 0)
@ -2740,7 +2728,6 @@ ST_FUNC int tcc_load_archive(TCCState *s1, int fd)
break;
}
ar_name[i + 1] = '\0';
// printf("name='%s' size=%d %s\n", ar_name, size, ar_size);
file_offset = lseek(fd, 0, SEEK_CUR);
/* align to even */
size = (size + 1) & ~1;
@ -2767,7 +2754,7 @@ ST_FUNC int tcc_load_archive(TCCState *s1, int fd)
is referenced by the user (so it should be added as DT_NEEDED in
the generated ELF file) */
ST_FUNC int tcc_load_dll(TCCState *s1, int fd, const char *filename, int level)
{
{
ElfW(Ehdr) ehdr;
ElfW(Shdr) *shdr, *sh, *sh1;
int i, j, nb_syms, nb_dts, sym_bind, ret;
@ -2776,7 +2763,7 @@ ST_FUNC int tcc_load_dll(TCCState *s1, int fd, const char *filename, int level)
unsigned char *dynstr;
const char *name, *soname;
DLLReference *dllref;
read(fd, &ehdr, sizeof(ehdr));
/* test CPU specific stuff */
@ -2811,10 +2798,10 @@ ST_FUNC int tcc_load_dll(TCCState *s1, int fd, const char *filename, int level)
break;
}
}
/* compute the real library name */
soname = tcc_basename(filename);
for(i = 0, dt = dynamic; i < nb_dts; i++, dt++) {
if (dt->d_tag == DT_SONAME) {
soname = dynstr + dt->d_un.d_val;
@ -2832,8 +2819,6 @@ ST_FUNC int tcc_load_dll(TCCState *s1, int fd, const char *filename, int level)
goto the_end;
}
}
// printf("loading dll '%s'\n", soname);
/* add the dll and its level */
dllref = tcc_mallocz(sizeof(DLLReference) + strlen(soname));
@ -2993,11 +2978,6 @@ static int ld_next(TCCState *s1, char *name, int name_size)
inp();
break;
}
#if 0
printf("tok=%c %d\n", c, c);
if (c == LD_TOK_NAME)
printf(" name=%s\n", name);
#endif
return c;
}
@ -3101,7 +3081,7 @@ ST_FUNC int tcc_load_ldscript(TCCState *s1)
char cmd[64];
char filename[1024];
int t, ret;
ch = file->buf_ptr[0];
ch = handle_eob();
for(;;) {
@ -3136,4 +3116,4 @@ ST_FUNC int tcc_load_ldscript(TCCState *s1)
}
return 0;
}
#endif /* ndef TCC_TARGET_PE */
#endif /* !TCC_TARGET_PE */