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Diffstat (limited to 'tinycc/x86_64-link.c')
-rw-r--r--tinycc/x86_64-link.c403
1 files changed, 0 insertions, 403 deletions
diff --git a/tinycc/x86_64-link.c b/tinycc/x86_64-link.c
deleted file mode 100644
index 1b6aa09..0000000
--- a/tinycc/x86_64-link.c
+++ /dev/null
@@ -1,403 +0,0 @@
-#ifdef TARGET_DEFS_ONLY
-
-#define EM_TCC_TARGET EM_X86_64
-
-/* relocation type for 32 bit data relocation */
-#define R_DATA_32 R_X86_64_32S
-#define R_DATA_PTR R_X86_64_64
-#define R_JMP_SLOT R_X86_64_JUMP_SLOT
-#define R_GLOB_DAT R_X86_64_GLOB_DAT
-#define R_COPY R_X86_64_COPY
-#define R_RELATIVE R_X86_64_RELATIVE
-
-#define R_NUM R_X86_64_NUM
-
-#define ELF_START_ADDR 0x400000
-#define ELF_PAGE_SIZE 0x200000
-
-#define PCRELATIVE_DLLPLT 1
-#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_X86_64_32:
- case R_X86_64_32S:
- case R_X86_64_64:
- case R_X86_64_GOTPC32:
- case R_X86_64_GOTPC64:
- case R_X86_64_GOTPCREL:
- case R_X86_64_GOTPCRELX:
- case R_X86_64_REX_GOTPCRELX:
- case R_X86_64_GOTTPOFF:
- case R_X86_64_GOT32:
- case R_X86_64_GOT64:
- case R_X86_64_GLOB_DAT:
- case R_X86_64_COPY:
- case R_X86_64_RELATIVE:
- case R_X86_64_GOTOFF64:
- case R_X86_64_TLSGD:
- case R_X86_64_TLSLD:
- case R_X86_64_DTPOFF32:
- case R_X86_64_TPOFF32:
- case R_X86_64_DTPOFF64:
- case R_X86_64_TPOFF64:
- return 0;
-
- case R_X86_64_PC32:
- case R_X86_64_PC64:
- case R_X86_64_PLT32:
- case R_X86_64_PLTOFF64:
- case R_X86_64_JUMP_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_X86_64_GLOB_DAT:
- case R_X86_64_JUMP_SLOT:
- case R_X86_64_COPY:
- case R_X86_64_RELATIVE:
- return NO_GOTPLT_ENTRY;
-
- /* The following relocs wouldn't normally need GOT or PLT
- slots, but we need them for simplicity in the link
- editor part. See our caller for comments. */
- case R_X86_64_32:
- case R_X86_64_32S:
- case R_X86_64_64:
- case R_X86_64_PC32:
- case R_X86_64_PC64:
- return AUTO_GOTPLT_ENTRY;
-
- case R_X86_64_GOTTPOFF:
- return BUILD_GOT_ONLY;
-
- case R_X86_64_GOT32:
- case R_X86_64_GOT64:
- case R_X86_64_GOTPC32:
- case R_X86_64_GOTPC64:
- case R_X86_64_GOTOFF64:
- case R_X86_64_GOTPCREL:
- case R_X86_64_GOTPCRELX:
- case R_X86_64_TLSGD:
- case R_X86_64_TLSLD:
- case R_X86_64_DTPOFF32:
- case R_X86_64_TPOFF32:
- case R_X86_64_DTPOFF64:
- case R_X86_64_TPOFF64:
- case R_X86_64_REX_GOTPCRELX:
- case R_X86_64_PLT32:
- case R_X86_64_PLTOFF64:
- 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;
-
- 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 */
- /* On x86-64, the relocation is referred to by _index_ */
- write32le(p + 7, relofs / sizeof (ElfW_Rel) - 1);
- 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 (p < p_end) {
- int x = s1->got->sh_addr - s1->plt->sh_addr - 6;
- add32le(p + 2, x);
- add32le(p + 8, x - 6);
- p += 16;
- while (p < p_end) {
- add32le(p + 2, x + (s1->plt->data - p));
- 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) {
- write64le(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_X86_64_64:
- 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_X86_64_64);
- qrel->r_addend = rel->r_addend;
- qrel++;
- break;
- } else {
- qrel->r_info = ELFW(R_INFO)(0, R_X86_64_RELATIVE);
- qrel->r_addend = read64le(ptr) + val;
- qrel++;
- }
- }
- add64le(ptr, val);
- break;
- case R_X86_64_32:
- case R_X86_64_32S:
- if (s1->output_type & TCC_OUTPUT_DYN) {
- /* XXX: this logic may depend on TCC's codegen
- now TCC uses R_X86_64_32 even for a 64bit pointer */
- qrel->r_offset = rel->r_offset;
- qrel->r_info = ELFW(R_INFO)(0, R_X86_64_RELATIVE);
- /* Use sign extension! */
- qrel->r_addend = (int)read32le(ptr) + val;
- qrel++;
- }
- add32le(ptr, val);
- break;
-
- case R_X86_64_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_X86_64_PC32);
- /* Use sign extension! */
- qrel->r_addend = (int)read32le(ptr) + rel->r_addend;
- qrel++;
- break;
- }
- }
- goto plt32pc32;
-
- case R_X86_64_PLT32:
- /* fallthrough: val already holds the PLT slot address */
-
- plt32pc32:
- {
- long long diff;
- diff = (long long)val - addr;
- if (diff < -2147483648LL || diff > 2147483647LL) {
-#ifdef TCC_TARGET_PE
- /* ignore overflow with undefined weak symbols */
- if (((ElfW(Sym)*)symtab_section->data)[sym_index].st_shndx != SHN_UNDEF)
-#endif
- tcc_error_noabort("internal error: relocation failed");
- }
- add32le(ptr, diff);
- }
- break;
-
- case R_X86_64_COPY:
- break;
-
- case R_X86_64_PLTOFF64:
- add64le(ptr, val - s1->got->sh_addr + rel->r_addend);
- break;
-
- case R_X86_64_PC64:
- 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_X86_64_PC64);
- qrel->r_addend = read64le(ptr) + rel->r_addend;
- qrel++;
- break;
- }
- }
- add64le(ptr, val - addr);
- break;
-
- case R_X86_64_GLOB_DAT:
- case R_X86_64_JUMP_SLOT:
- /* They don't need addend */
- write64le(ptr, val - rel->r_addend);
- break;
- case R_X86_64_GOTPCREL:
- case R_X86_64_GOTPCRELX:
- case R_X86_64_REX_GOTPCRELX:
- add32le(ptr, s1->got->sh_addr - addr +
- get_sym_attr(s1, sym_index, 0)->got_offset - 4);
- break;
- case R_X86_64_GOTPC32:
- add32le(ptr, s1->got->sh_addr - addr + rel->r_addend);
- break;
- case R_X86_64_GOTPC64:
- add64le(ptr, s1->got->sh_addr - addr + rel->r_addend);
- break;
- case R_X86_64_GOTTPOFF:
- add32le(ptr, val - s1->got->sh_addr);
- break;
- case R_X86_64_GOT32:
- /* we load the got offset */
- add32le(ptr, get_sym_attr(s1, sym_index, 0)->got_offset);
- break;
- case R_X86_64_GOT64:
- /* we load the got offset */
- add64le(ptr, get_sym_attr(s1, sym_index, 0)->got_offset);
- break;
- case R_X86_64_GOTOFF64:
- add64le(ptr, val - s1->got->sh_addr);
- break;
- case R_X86_64_TLSGD:
- {
- static const unsigned char expect[] = {
- /* .byte 0x66; lea 0(%rip),%rdi */
- 0x66, 0x48, 0x8d, 0x3d, 0x00, 0x00, 0x00, 0x00,
- /* .word 0x6666; rex64; call __tls_get_addr@PLT */
- 0x66, 0x66, 0x48, 0xe8, 0x00, 0x00, 0x00, 0x00 };
- static const unsigned char replace[] = {
- /* mov %fs:0,%rax */
- 0x64, 0x48, 0x8b, 0x04, 0x25, 0x00, 0x00, 0x00, 0x00,
- /* lea -4(%rax),%rax */
- 0x48, 0x8d, 0x80, 0x00, 0x00, 0x00, 0x00 };
-
- if (memcmp (ptr-4, expect, sizeof(expect)) == 0) {
- ElfW(Sym) *sym;
- Section *sec;
- int32_t x;
-
- memcpy(ptr-4, replace, sizeof(replace));
- rel[1].r_info = ELFW(R_INFO)(0, R_X86_64_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 + 8, x);
- }
- else
- tcc_error_noabort("unexpected R_X86_64_TLSGD pattern");
- }
- break;
- case R_X86_64_TLSLD:
- {
- static const unsigned char expect[] = {
- /* lea 0(%rip),%rdi */
- 0x48, 0x8d, 0x3d, 0x00, 0x00, 0x00, 0x00,
- /* call __tls_get_addr@PLT */
- 0xe8, 0x00, 0x00, 0x00, 0x00 };
- static const unsigned char replace[] = {
- /* data16 data16 data16 mov %fs:0,%rax */
- 0x66, 0x66, 0x66, 0x64, 0x48, 0x8b, 0x04, 0x25,
- 0x00, 0x00, 0x00, 0x00 };
-
- if (memcmp (ptr-3, expect, sizeof(expect)) == 0) {
- memcpy(ptr-3, replace, sizeof(replace));
- rel[1].r_info = ELFW(R_INFO)(0, R_X86_64_NONE);
- }
- else
- tcc_error_noabort("unexpected R_X86_64_TLSLD pattern");
- }
- break;
- case R_X86_64_DTPOFF32:
- case R_X86_64_TPOFF32:
- {
- 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);
- }
- break;
- case R_X86_64_DTPOFF64:
- case R_X86_64_TPOFF64:
- {
- 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;
- add64le(ptr, x);
- }
- break;
- case R_X86_64_NONE:
- break;
- case R_X86_64_RELATIVE:
-#ifdef TCC_TARGET_PE
- add32le(ptr, val - s1->pe_imagebase);
-#endif
- /* do nothing */
- break;
- default:
- fprintf(stderr,"FIXME: handle reloc type %d at %x [%p] to %x\n",
- type, (unsigned)addr, ptr, (unsigned)val);
- break;
- }
-}
-
-#endif /* !TARGET_DEFS_ONLY */
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