122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
#ifdef TARGET_DEFS_ONLY
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#define EM_TCC_TARGET EM_RISCV
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#define R_DATA_32 R_RISCV_32
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#define R_DATA_PTR R_RISCV_64
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#define R_JMP_SLOT R_RISCV_JUMP_SLOT
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#define R_GLOB_DAT R_RISCV_64
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#define R_COPY R_RISCV_COPY
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#define R_RELATIVE R_RISCV_RELATIVE
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#define R_NUM R_RISCV_NUM
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#define ELF_START_ADDR 0x00010000
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#define ELF_PAGE_SIZE 0x1000
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#define PCRELATIVE_DLLPLT 1
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#define RELOCATE_DLLPLT 1
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#else /* !TARGET_DEFS_ONLY */
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#include "tcc.h"
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/* Returns 1 for a code relocation, 0 for a data relocation. For unknown
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relocations, returns -1. */
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int code_reloc (int reloc_type)
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{
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switch (reloc_type) {
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}
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tcc_error ("Unknown relocation type: %d", reloc_type);
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return -1;
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}
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/* Returns an enumerator to describe whether and when the relocation needs a
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GOT and/or PLT entry to be created. See tcc.h for a description of the
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different values. */
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int gotplt_entry_type (int reloc_type)
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{
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switch (reloc_type) {
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}
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tcc_error ("Unknown relocation type: %d", reloc_type);
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return -1;
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}
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ST_FUNC unsigned create_plt_entry(TCCState *s1, unsigned got_offset, struct sym_attr *attr)
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{
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Section *plt = s1->plt;
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uint8_t *p;
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unsigned plt_offset;
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if (s1->output_type == TCC_OUTPUT_DLL)
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tcc_error("DLLs unimplemented!");
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if (plt->data_offset == 0)
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section_ptr_add(plt, 32);
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plt_offset = plt->data_offset;
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p = section_ptr_add(plt, 16);
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write64le(p, got_offset);
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return plt_offset;
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}
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/* relocate the PLT: compute addresses and offsets in the PLT now that final
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address for PLT and GOT are known (see fill_program_header) */
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ST_FUNC void relocate_plt(TCCState *s1)
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{
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uint8_t *p, *p_end;
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if (!s1->plt)
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return;
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p = s1->plt->data;
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p_end = p + s1->plt->data_offset;
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if (p < p_end) {
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uint64_t plt = s1->plt->sh_addr;
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uint64_t got = s1->got->sh_addr;
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uint64_t off = (got >> 12) - (plt >> 12);
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if ((off + ((uint32_t)1 << 20)) >> 21)
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tcc_error("Failed relocating PLT (off=0x%lx, got=0x%lx, plt=0x%lx)", off, got, plt);
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write32le(p, 0x0);
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write32le(p + 4, 0x0);
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write32le(p + 8, 0x0);
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write32le(p + 12, 0x0);
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write32le(p + 16, 0x0);
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write32le(p + 20, 0x0);
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write32le(p + 24, 0x0);
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write32le(p + 28, 0x0);
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p += 32;
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while (p < p_end) {
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uint64_t pc = plt + (p - s1->plt->data);
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uint64_t addr = got + read64le(p);
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uint64_t off = (addr >> 12) - (pc >> 12);
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if ((off + ((uint32_t)1 << 20)) >> 21)
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tcc_error("Failed relocating PLT (off=0x%lx, addr=0x%lx, pc=0x%lx)", off, addr, pc);
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write32le(p, 0x0);
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write32le(p + 4, 0x0);
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write32le(p + 8, 0x0);
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write32le(p + 12, 0x0);
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p += 16;
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}
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}
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}
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void relocate_init(Section *sr) {}
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void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned char *ptr, addr_t addr, addr_t val)
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{
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int sym_index = ELFW(R_SYM)(rel->r_info);
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#ifdef DEBUG_RELOC
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ElfW(Sym) *sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
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#endif
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switch(type) {
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default:
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fprintf(stderr, "FIXME: handle reloc type %x 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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#endif
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