90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
#include "tcc.h"
|
|
#define HAVE_SECTION_RELOC
|
|
|
|
static ElfW_Rel *qrel; /* ptr to next reloc entry reused */
|
|
|
|
void relocate_init(Section *sr)
|
|
{
|
|
qrel = (ElfW_Rel *) sr->data;
|
|
}
|
|
|
|
void relocate(TCCState *s1, ElfW_Rel *rel, int type, char *ptr, addr_t addr, addr_t val)
|
|
{
|
|
int sym_index, esym_index;
|
|
|
|
sym_index = ELFW(R_SYM)(rel->r_info);
|
|
|
|
switch (type) {
|
|
case R_386_32:
|
|
if (s1->output_type == TCC_OUTPUT_DLL) {
|
|
esym_index = s1->symtab_to_dynsym[sym_index];
|
|
qrel->r_offset = rel->r_offset;
|
|
if (esym_index) {
|
|
qrel->r_info = ELFW(R_INFO)(esym_index, R_386_32);
|
|
qrel++;
|
|
return;
|
|
} else {
|
|
qrel->r_info = ELFW(R_INFO)(0, R_386_RELATIVE);
|
|
qrel++;
|
|
}
|
|
}
|
|
add32le(ptr, val);
|
|
return;
|
|
case R_386_PC32:
|
|
if (s1->output_type == TCC_OUTPUT_DLL) {
|
|
/* DLL relocation */
|
|
esym_index = s1->symtab_to_dynsym[sym_index];
|
|
if (esym_index) {
|
|
qrel->r_offset = rel->r_offset;
|
|
qrel->r_info = ELFW(R_INFO)(esym_index, R_386_PC32);
|
|
qrel++;
|
|
return;
|
|
}
|
|
}
|
|
add32le(ptr, val - addr);
|
|
return;
|
|
case R_386_PLT32:
|
|
add32le(ptr, val - addr);
|
|
return;
|
|
case R_386_GLOB_DAT:
|
|
case R_386_JMP_SLOT:
|
|
write32le(ptr, val);
|
|
return;
|
|
case R_386_GOTPC:
|
|
add32le(ptr, s1->got->sh_addr - addr);
|
|
return;
|
|
case R_386_GOTOFF:
|
|
add32le(ptr, val - s1->got->sh_addr);
|
|
return;
|
|
case R_386_GOT32:
|
|
case R_386_GOT32X:
|
|
/* we load the got offset */
|
|
add32le(ptr, s1->sym_attrs[sym_index].got_offset);
|
|
return;
|
|
case R_386_16:
|
|
if (s1->output_format != TCC_OUTPUT_FORMAT_BINARY) {
|
|
output_file:
|
|
tcc_error("can only produce 16-bit binary files");
|
|
}
|
|
write16le(ptr, read16le(ptr) + val);
|
|
return;
|
|
case R_386_PC16:
|
|
if (s1->output_format != TCC_OUTPUT_FORMAT_BINARY)
|
|
goto output_file;
|
|
write16le(ptr, read16le(ptr) + val - addr);
|
|
return;
|
|
case R_386_RELATIVE:
|
|
/* do nothing */
|
|
return;
|
|
case R_386_COPY:
|
|
/* This reloction must copy initialized data from the library
|
|
to the program .bss segment. Currently made like for ARM
|
|
(to remove noise of defaukt case). Is this true?
|
|
*/
|
|
return;
|
|
default:
|
|
fprintf(stderr,"FIXME: handle reloc type %d at %x [%p] to %x\n",
|
|
type, (unsigned)addr, ptr, (unsigned)val);
|
|
return;
|
|
}
|
|
}
|