meesbs
/
tinycc
forked from Mirrors/tinycc
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
tinycc/c67-link.c

70 lines
2.2 KiB
C
Raw Normal View History

Fix relocs_info declaration in tcc.h C standard specifies that array should be declared with a non null size or with * for standard array. Declaration of relocs_info in tcc.h was not respecting this rule. This commit add a R_NUM macro that maps to the R_<ARCH>_NUM macros and declare relocs_info using it. This commit also moves all linker-related macros from <arch>-gen.c files to <arch>-link.c ones.
2016-12-05 20:40:59 +00:00
#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_NUM R_C60_NUM
#define ELF_START_ADDR 0x00000400
#define ELF_PAGE_SIZE 0x1000
Do section relocation in architecture backend
2016-11-12 15:16:06 +00:00
#define HAVE_SECTION_RELOC
Fix PLT creation for i386 i386 target does not have PC relative loads. Its ABI therefore require ebx register to points to the GOT when executing a PLT entry. This means that PLT entry cannot be used transparently, the compiler needs to expect execution of a PLT entry to be able to use one, that is a PLT entry should only be created if the relocation explicitely asks for it (eg. R_386_PLT32). This patch creates a new target macro PCRELATIVE_DLLPLT to indicate whether a target can do a PC relative load in PLT entry when building a dynamic library. Executable do not normally pose a problem because they are loaded at a fixed address and thus the absolute address of GOT can be used. Note that in such a case, if the compiler does not use a PLT aware relocation for external access then the code relocation will fall on the dynamic loader since there is no PLT entry to relocate too.
2016-12-10 09:14:29 +00:00
#define PCRELATIVE_DLLPLT 0
Do section relocation in architecture backend
2016-11-12 15:16:06 +00:00
Fix relocs_info declaration in tcc.h C standard specifies that array should be declared with a non null size or with * for standard array. Declaration of relocs_info in tcc.h was not respecting this rule. This commit add a R_NUM macro that maps to the R_<ARCH>_NUM macros and declare relocs_info using it. This commit also moves all linker-related macros from <arch>-gen.c files to <arch>-link.c ones.
2016-12-05 20:40:59 +00:00
#else /* !TARGET_DEFS_ONLY */
#include "tcc.h"
Add missing relocation info for C67 target Fill in relocs_info table for C67 and fix R_C60_NUM value to really be greater than all relocation values known to TCC.
2016-12-10 17:11:00 +00:00
ST_DATA struct reloc_info relocs_info[R_NUM] = {
Remove now useless pltoff_addend reloc info Last use for pltoff_addend field of relocs_info array was removed in commit 25927df3b75c5ce2b64ab8acdcc5974b4e1c89c1. It is now useless so this commit removes it and all initialization related to it.
2016-12-10 17:18:09 +00:00
INIT_RELOC_INFO (R_C60_32, 0, NO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_C60LO16, 0, NO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_C60HI16, 0, NO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_C60_GOTOFF, 0, BUILD_GOT_ONLY)
INIT_RELOC_INFO (R_C60_GOTPC, 0, BUILD_GOT_ONLY)
INIT_RELOC_INFO (R_C60_GOT32, 0, ALWAYS_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_C60_PLT32, 1, ALWAYS_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_C60_GLOB_DAT, 0, NO_GOTPLT_ENTRY)
INIT_RELOC_INFO (R_C60_JMP_SLOT, 1, NO_GOTPLT_ENTRY)
Add missing relocation info for C67 target Fill in relocs_info table for C67 and fix R_C60_NUM value to really be greater than all relocation values known to TCC.
2016-12-10 17:11:00 +00:00
};
Add relocs_info array to c67 backend
2016-12-05 20:52:02 +00:00
Do section relocation in architecture backend
2016-11-12 15:16:06 +00:00
void relocate_init(Section *sr) {}
void relocate(TCCState *s1, ElfW_Rel *rel, int type, 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;
}
}
Fix relocs_info declaration in tcc.h C standard specifies that array should be declared with a non null size or with * for standard array. Declaration of relocs_info in tcc.h was not respecting this rule. This commit add a R_NUM macro that maps to the R_<ARCH>_NUM macros and declare relocs_info using it. This commit also moves all linker-related macros from <arch>-gen.c files to <arch>-link.c ones.
2016-12-05 20:40:59 +00:00
#endif /* !TARGET_DEFS_ONLY */