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Use functions to get relocation info

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MSVC does not support array designator so cannot compile source using
relocs_info. This commit replace the relocs_info array into a set of
functions, each returning the value given by a given field of the struct
reloc_info.
This commit is contained in:
Thomas Preud'homme
2016-12-10 17:22:08 +00:00
parent d31226c873
commit fe6453f8f0
7 changed files with 320 additions and 109 deletions
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97
arm-link.c
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@@ -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) {}