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-rw-r--r--tinycc/i386-link.c325
1 files changed, 0 insertions, 325 deletions
diff --git a/tinycc/i386-link.c b/tinycc/i386-link.c
deleted file mode 100644
index 2fb1463..0000000
--- a/tinycc/i386-link.c
+++ /dev/null
@@ -1,325 +0,0 @@
-#ifdef TARGET_DEFS_ONLY
-
-#define EM_TCC_TARGET EM_386
-
-/* relocation type for 32 bit data relocation */
-#define R_DATA_32 R_386_32
-#define R_DATA_PTR R_386_32
-#define R_JMP_SLOT R_386_JMP_SLOT
-#define R_GLOB_DAT R_386_GLOB_DAT
-#define R_COPY R_386_COPY
-#define R_RELATIVE R_386_RELATIVE
-
-#define R_NUM R_386_NUM
-
-#define ELF_START_ADDR 0x08048000
-#define ELF_PAGE_SIZE 0x1000
-
-#define PCRELATIVE_DLLPLT 0
-#define RELOCATE_DLLPLT 1
-
-#else /* !TARGET_DEFS_ONLY */
-
-#include "tcc.h"
-
-#ifdef NEED_RELOC_TYPE
-/* Returns 1 for a code relocation, 0 for a data relocation. For unknown
- relocations, returns -1. */
-int code_reloc (int reloc_type)
-{
- switch (reloc_type) {
- case R_386_RELATIVE:
- case R_386_16:
- case R_386_32:
- case R_386_GOTPC:
- case R_386_GOTOFF:
- case R_386_GOT32:
- case R_386_GOT32X:
- case R_386_GLOB_DAT:
- case R_386_COPY:
- case R_386_TLS_GD:
- case R_386_TLS_LDM:
- case R_386_TLS_LDO_32:
- case R_386_TLS_LE:
- return 0;
-
- case R_386_PC16:
- case R_386_PC32:
- case R_386_PLT32:
- case R_386_JMP_SLOT:
- return 1;
- }
- return -1;
-}
-
-/* Returns an enumerator to describe whether and when the relocation needs a
- GOT and/or PLT entry to be created. See tcc.h for a description of the
- different values. */
-int gotplt_entry_type (int reloc_type)
-{
- switch (reloc_type) {
- case R_386_RELATIVE:
- case R_386_16:
- case R_386_GLOB_DAT:
- case R_386_JMP_SLOT:
- case R_386_COPY:
- return NO_GOTPLT_ENTRY;
-
- case R_386_32:
- /* This relocations shouldn't normally need GOT or PLT
- slots if it weren't for simplicity in the code generator.
- See our caller for comments. */
- return AUTO_GOTPLT_ENTRY;
-
- case R_386_PC16:
- case R_386_PC32:
- return AUTO_GOTPLT_ENTRY;
-
- case R_386_GOTPC:
- case R_386_GOTOFF:
- return BUILD_GOT_ONLY;
-
- case R_386_GOT32:
- case R_386_GOT32X:
- case R_386_PLT32:
- case R_386_TLS_GD:
- case R_386_TLS_LDM:
- case R_386_TLS_LDO_32:
- case R_386_TLS_LE:
- return ALWAYS_GOTPLT_ENTRY;
- }
- return -1;
-}
-
-#ifdef NEED_BUILD_GOT
-ST_FUNC unsigned create_plt_entry(TCCState *s1, unsigned got_offset, struct sym_attr *attr)
-{
- Section *plt = s1->plt;
- uint8_t *p;
- int modrm;
- unsigned plt_offset, relofs;
-
- /* on i386 if we build a DLL, we add a %ebx offset */
- if (s1->output_type & TCC_OUTPUT_DYN)
- modrm = 0xa3;
- else
- modrm = 0x25;
-
- /* empty PLT: create PLT0 entry that pushes the library identifier
- (GOT + PTR_SIZE) and jumps to ld.so resolution routine
- (GOT + 2 * PTR_SIZE) */
- if (plt->data_offset == 0) {
- p = section_ptr_add(plt, 16);
- p[0] = 0xff; /* pushl got + PTR_SIZE */
- p[1] = modrm + 0x10;
- write32le(p + 2, PTR_SIZE);
- p[6] = 0xff; /* jmp *(got + PTR_SIZE * 2) */
- p[7] = modrm;
- write32le(p + 8, PTR_SIZE * 2);
- }
- plt_offset = plt->data_offset;
-
- /* The PLT slot refers to the relocation entry it needs via offset.
- The reloc entry is created below, so its offset is the current
- data_offset */
- relofs = s1->plt->reloc ? s1->plt->reloc->data_offset : 0;
-
- /* Jump to GOT entry where ld.so initially put the address of ip + 4 */
- p = section_ptr_add(plt, 16);
- p[0] = 0xff; /* jmp *(got + x) */
- p[1] = modrm;
- write32le(p + 2, got_offset);
- p[6] = 0x68; /* push $xxx */
- write32le(p + 7, relofs - sizeof (ElfW_Rel));
- p[11] = 0xe9; /* jmp plt_start */
- write32le(p + 12, -(plt->data_offset));
- return plt_offset;
-}
-
-/* relocate the PLT: compute addresses and offsets in the PLT now that final
- address for PLT and GOT are known (see fill_program_header) */
-ST_FUNC void relocate_plt(TCCState *s1)
-{
- uint8_t *p, *p_end;
-
- if (!s1->plt)
- return;
-
- p = s1->plt->data;
- p_end = p + s1->plt->data_offset;
-
- if (!(s1->output_type & TCC_OUTPUT_DYN) && p < p_end) {
- add32le(p + 2, s1->got->sh_addr);
- add32le(p + 8, s1->got->sh_addr);
- p += 16;
- while (p < p_end) {
- add32le(p + 2, s1->got->sh_addr);
- p += 16;
- }
- }
-
- if (s1->plt->reloc) {
- ElfW_Rel *rel;
- int x = s1->plt->sh_addr + 16 + 6;
- p = s1->got->data;
- for_each_elem(s1->plt->reloc, 0, rel, ElfW_Rel) {
- write32le(p + rel->r_offset, x);
- x += 16;
- }
- }
-}
-#endif
-#endif
-
-void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned 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_DYN) {
- esym_index = get_sym_attr(s1, sym_index, 0)->dyn_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 = get_sym_attr(s1, sym_index, 0)->dyn_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, get_sym_attr(s1, sym_index, 0)->got_offset);
- return;
- case R_386_16:
- if (s1->output_format != TCC_OUTPUT_FORMAT_BINARY) {
- output_file:
- tcc_error_noabort("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:
-#ifdef TCC_TARGET_PE
- add32le(ptr, val - s1->pe_imagebase);
-#endif
- /* do nothing */
- return;
- case R_386_COPY:
- /* This relocation must copy initialized data from the library
- to the program .bss segment. Currently made like for ARM
- (to remove noise of default case). Is this true?
- */
- return;
- case R_386_TLS_GD:
- {
- static const unsigned char expect[] = {
- /* lea 0(,%ebx,1),%eax */
- 0x8d, 0x04, 0x1d, 0x00, 0x00, 0x00, 0x00,
- /* call __tls_get_addr@PLT */
- 0xe8, 0xfc, 0xff, 0xff, 0xff };
- static const unsigned char replace[] = {
- /* mov %gs:0,%eax */
- 0x65, 0xa1, 0x00, 0x00, 0x00, 0x00,
- /* sub 0,%eax */
- 0x81, 0xe8, 0x00, 0x00, 0x00, 0x00 };
-
- if (memcmp (ptr-3, expect, sizeof(expect)) == 0) {
- ElfW(Sym) *sym;
- Section *sec;
- int32_t x;
-
- memcpy(ptr-3, replace, sizeof(replace));
- rel[1].r_info = ELFW(R_INFO)(0, R_386_NONE);
- sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
- sec = s1->sections[sym->st_shndx];
- x = sym->st_value - sec->sh_addr - sec->data_offset;
- add32le(ptr + 5, -x);
- }
- else
- tcc_error_noabort("unexpected R_386_TLS_GD pattern");
- }
- return;
- case R_386_TLS_LDM:
- {
- static const unsigned char expect[] = {
- /* lea 0(%ebx),%eax */
- 0x8d, 0x83, 0x00, 0x00, 0x00, 0x00,
- /* call __tls_get_addr@PLT */
- 0xe8, 0xfc, 0xff, 0xff, 0xff };
- static const unsigned char replace[] = {
- /* mov %gs:0,%eax */
- 0x65, 0xa1, 0x00, 0x00, 0x00, 0x00,
- /* nop */
- 0x90,
- /* lea 0(%esi,%eiz,1),%esi */
- 0x8d, 0x74, 0x26, 0x00 };
-
- if (memcmp (ptr-2, expect, sizeof(expect)) == 0) {
- memcpy(ptr-2, replace, sizeof(replace));
- rel[1].r_info = ELFW(R_INFO)(0, R_386_NONE);
- }
- else
- tcc_error_noabort("unexpected R_386_TLS_LDM pattern");
- }
- return;
- case R_386_TLS_LDO_32:
- case R_386_TLS_LE:
- {
- ElfW(Sym) *sym;
- Section *sec;
- int32_t x;
-
- sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
- sec = s1->sections[sym->st_shndx];
- x = val - sec->sh_addr - sec->data_offset;
- add32le(ptr, x);
- }
- return;
- case R_386_NONE:
- return;
- default:
- fprintf(stderr,"FIXME: handle reloc type %d at %x [%p] to %x\n",
- type, (unsigned)addr, ptr, (unsigned)val);
- return;
- }
-}
-
-#endif /* !TARGET_DEFS_ONLY */
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