mirror of
https://github.com/frida/tinycc
synced 2024-11-24 08:39:37 +03:00
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
#ifdef TARGET_DEFS_ONLY
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#define EM_TCC_TARGET EM_C60
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/* relocation type for 32 bit data relocation */
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#define R_DATA_32 R_C60_32
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#define R_DATA_PTR R_C60_32
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#define R_JMP_SLOT R_C60_JMP_SLOT
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#define R_GLOB_DAT R_C60_GLOB_DAT
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#define R_COPY R_C60_COPY
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#define R_RELATIVE R_C60_RELATIVE
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#define R_NUM R_C60_NUM
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#define ELF_START_ADDR 0x00000400
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#define ELF_PAGE_SIZE 0x1000
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#define PCRELATIVE_DLLPLT 0
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#define RELOCATE_DLLPLT 0
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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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case R_C60_32:
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case R_C60LO16:
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case R_C60HI16:
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case R_C60_GOT32:
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case R_C60_GOTOFF:
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case R_C60_GOTPC:
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case R_C60_COPY:
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return 0;
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case R_C60_PLT32:
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return 1;
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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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case R_C60_32:
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case R_C60LO16:
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case R_C60HI16:
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case R_C60_COPY:
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return NO_GOTPLT_ENTRY;
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case R_C60_GOTOFF:
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case R_C60_GOTPC:
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return BUILD_GOT_ONLY;
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case R_C60_PLT32:
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case R_C60_GOT32:
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return ALWAYS_GOTPLT_ENTRY;
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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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tcc_error("C67 got not implemented");
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return 0;
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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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/* XXX: TODO */
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while (p < p_end) {
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/* XXX: TODO */
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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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switch(type) {
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case R_C60_32:
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*(int *)ptr += val;
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break;
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case R_C60LO16:
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{
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uint32_t orig;
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/* put the low 16 bits of the absolute address add to what is
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already there */
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orig = ((*(int *)(ptr )) >> 7) & 0xffff;
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orig |= (((*(int *)(ptr+4)) >> 7) & 0xffff) << 16;
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/* patch both at once - assumes always in pairs Low - High */
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*(int *) ptr = (*(int *) ptr & (~(0xffff << 7)) ) |
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(((val+orig) & 0xffff) << 7);
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*(int *)(ptr+4) = (*(int *)(ptr+4) & (~(0xffff << 7)) ) |
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((((val+orig)>>16) & 0xffff) << 7);
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}
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break;
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case R_C60HI16:
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break;
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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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break;
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}
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}
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#endif /* !TARGET_DEFS_ONLY */
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