#ifdef TARGET_DEFS_ONLY #define EM_TCC_TARGET EM_C60 /* relocation type for 32 bit data relocation */ #define R_DATA_32 R_C60_32 #define R_DATA_PTR R_C60_32 #define R_JMP_SLOT R_C60_JMP_SLOT #define R_GLOB_DAT R_C60_GLOB_DAT #define R_COPY R_C60_COPY #define R_RELATIVE R_C60_RELATIVE #define R_NUM R_C60_NUM #define ELF_START_ADDR 0x00000400 #define ELF_PAGE_SIZE 0x1000 #define PCRELATIVE_DLLPLT 0 #define RELOCATE_DLLPLT 0 #else /* !TARGET_DEFS_ONLY */ #include "tcc.h" /* 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_C60_32: case R_C60LO16: case R_C60HI16: case R_C60_GOT32: case R_C60_GOTOFF: case R_C60_GOTPC: case R_C60_COPY: return 0; case R_C60_PLT32: return 1; } tcc_error ("Unknown relocation type: %d", reloc_type); 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_C60_32: case R_C60LO16: case R_C60HI16: case R_C60_COPY: return NO_GOTPLT_ENTRY; case R_C60_GOTOFF: case R_C60_GOTPC: return BUILD_GOT_ONLY; case R_C60_PLT32: case R_C60_GOT32: return ALWAYS_GOTPLT_ENTRY; } tcc_error ("Unknown relocation type: %d", reloc_type); return -1; } ST_FUNC unsigned create_plt_entry(TCCState *s1, unsigned got_offset, struct sym_attr *attr) { tcc_error("C67 got not implemented"); return 0; } /* 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) { /* XXX: TODO */ while (p < p_end) { /* XXX: TODO */ } } } void relocate_init(Section *sr) {} void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned char *ptr, addr_t addr, addr_t val) { switch(type) { case R_C60_32: *(int *)ptr += val; break; case R_C60LO16: { uint32_t orig; /* put the low 16 bits of the absolute address add to what is already there */ orig = ((*(int *)(ptr )) >> 7) & 0xffff; orig |= (((*(int *)(ptr+4)) >> 7) & 0xffff) << 16; /* patch both at once - assumes always in pairs Low - High */ *(int *) ptr = (*(int *) ptr & (~(0xffff << 7)) ) | (((val+orig) & 0xffff) << 7); *(int *)(ptr+4) = (*(int *)(ptr+4) & (~(0xffff << 7)) ) | ((((val+orig)>>16) & 0xffff) << 7); } break; case R_C60HI16: break; default: fprintf(stderr,"FIXME: handle reloc type %x at %x [%p] to %x\n", type, (unsigned) addr, ptr, (unsigned) val); break; } } #endif /* !TARGET_DEFS_ONLY */