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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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73
x86_64-link.c
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@@ -21,21 +21,66 @@
#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_X86_64_32:
case R_X86_64_32S:
case R_X86_64_64:
case R_X86_64_GOTPCREL:
case R_X86_64_GOTPCRELX:
case R_X86_64_REX_GOTPCRELX:
case R_X86_64_GOTTPOFF:
case R_X86_64_GOT32:
case R_X86_64_GLOB_DAT:
case R_X86_64_COPY:
return 0;
case R_X86_64_PC32:
case R_X86_64_PLT32:
case R_X86_64_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_X86_64_GLOB_DAT:
case R_X86_64_JUMP_SLOT:
case R_X86_64_COPY:
return NO_GOTPLT_ENTRY;
case R_X86_64_32:
case R_X86_64_32S:
case R_X86_64_64:
case R_X86_64_PC32:
return AUTO_GOTPLT_ENTRY;
case R_X86_64_GOTTPOFF:
return BUILD_GOT_ONLY;
case R_X86_64_GOT32:
case R_X86_64_GOTPCREL:
case R_X86_64_GOTPCRELX:
case R_X86_64_REX_GOTPCRELX:
case R_X86_64_PLT32:
return ALWAYS_GOTPLT_ENTRY;
}
tcc_error ("Unknown relocation type: %d", reloc_type);
return -1;
}
static ElfW_Rel *qrel; /* ptr to next reloc entry reused */
ST_DATA struct reloc_info relocs_info[R_NUM] = {
INIT_RELOC_INFO (R_X86_64_64, 0, AUTO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_32, 0, AUTO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_32S, 0, AUTO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_PC32, 1, AUTO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_PLT32, 1, ALWAYS_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_GLOB_DAT, 0, NO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_JUMP_SLOT, 1, NO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_GOTPCREL, 0, ALWAYS_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_GOTPCRELX, 0, ALWAYS_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_REX_GOTPCRELX, 0, ALWAYS_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_X86_64_GOTTPOFF, 0, BUILD_GOT_ONLY)
INIT_RELOC_INFO (R_X86_64_GOT32, 0, ALWAYS_GOTPLT_ENTRY)
};
void relocate_init(Section *sr)
{