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