diff options
Diffstat (limited to 'arm-link.c')
| -rw-r--r-- | arm-link.c | 97 |
1 files changed, 74 insertions, 23 deletions
@@ -26,29 +26,80 @@ enum float_abi { #include "tcc.h" -ST_DATA struct reloc_info relocs_info[R_NUM] = { - INIT_RELOC_INFO (R_ARM_PC24, 1, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_CALL, 1, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_JUMP24, 1, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_PLT32, 1, ALWAYS_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_THM_PC22, 1, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_THM_JUMP24, 1, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_MOVT_ABS, 0, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_MOVW_ABS_NC, 0, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_THM_MOVT_ABS, 0, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_THM_MOVW_ABS_NC, 0, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_PREL31, 1, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_ABS32, 0, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_REL32, 0, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_GOTPC, 0, BUILD_GOT_ONLY) - INIT_RELOC_INFO (R_ARM_GOTOFF, 0, BUILD_GOT_ONLY) - INIT_RELOC_INFO (R_ARM_GOT32, 0, ALWAYS_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_COPY, 0, NO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_V4BX, 1, AUTO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_GLOB_DAT, 0, NO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_JUMP_SLOT, 1, NO_GOTPLT_ENTRY) - INIT_RELOC_INFO (R_ARM_NONE, 0, NO_GOTPLT_ENTRY) -}; +/* 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_ARM_MOVT_ABS: + case R_ARM_MOVW_ABS_NC: + case R_ARM_THM_MOVT_ABS: + case R_ARM_THM_MOVW_ABS_NC: + case R_ARM_ABS32: + case R_ARM_REL32: + case R_ARM_GOTPC: + case R_ARM_GOTOFF: + case R_ARM_GOT32: + case R_ARM_COPY: + case R_ARM_GLOB_DAT: + case R_ARM_NONE: + return 0; + + case R_ARM_PC24: + case R_ARM_CALL: + case R_ARM_JUMP24: + case R_ARM_PLT32: + case R_ARM_THM_PC22: + case R_ARM_THM_JUMP24: + case R_ARM_PREL31: + case R_ARM_V4BX: + case R_ARM_JUMP_SLOT: + return 1; + } + + tcc_error ("Unknown relocation type: %d", reloc_type); + return -1; +} + +/* Returns an enumerator to describe wether 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_ARM_NONE: + case R_ARM_COPY: + case R_ARM_GLOB_DAT: + case R_ARM_JUMP_SLOT: + return NO_GOTPLT_ENTRY; + + case R_ARM_PC24: + case R_ARM_CALL: + case R_ARM_JUMP24: + case R_ARM_PLT32: + case R_ARM_THM_PC22: + case R_ARM_THM_JUMP24: + case R_ARM_MOVT_ABS: + case R_ARM_MOVW_ABS_NC: + case R_ARM_THM_MOVT_ABS: + case R_ARM_THM_MOVW_ABS_NC: + case R_ARM_PREL31: + case R_ARM_ABS32: + case R_ARM_REL32: + case R_ARM_V4BX: + return AUTO_GOTPLT_ENTRY; + + case R_ARM_GOTPC: + case R_ARM_GOTOFF: + return BUILD_GOT_ONLY; + + case R_ARM_GOT32: + return ALWAYS_GOTPLT_ENTRY; + } + + tcc_error ("Unknown relocation type: %d", reloc_type); + return -1; +} void relocate_init(Section *sr) {} |