mirror/binutils-gdb
2
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2025-02-11 13:02:10 +08:00
Code Issues Packages Projects Releases Wiki Activity

LoongArch: gas: Relocations simplification when -mno-relax

Browse Source 
Gas does not emit ADD/SUB relocation pairs for label differences
  when -mno-relax.
This commit is contained in:
mengqinggang 2023-06-02 17:24:10 +08:00 committed by liuzhensong
parent 26d812a2aa
commit 55e1609e53
2 changed files with 26 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
gas/config/tc-loongarch.c
View File

@ -915,8 +915,9 @@ append_fixp_and_insn (struct loongarch_cl_insn *ip)
symbol is not in the same frag, it will generate relocs to calculate symbol is not in the same frag, it will generate relocs to calculate
symbol subtraction. (gas/dw2gencfi.c:output_cfi_insn: symbol subtraction. (gas/dw2gencfi.c:output_cfi_insn:
if (symbol_get_frag (to) == symbol_get_frag (from))) */ if (symbol_get_frag (to) == symbol_get_frag (from))) */
if (BFD_RELOC_LARCH_PCALA_HI20 == reloc_info[0].type if (LARCH_opts.relax
|| BFD_RELOC_LARCH_GOT_PC_HI20 == reloc_info[0].type) && (BFD_RELOC_LARCH_PCALA_HI20 == reloc_info[0].type
|| BFD_RELOC_LARCH_GOT_PC_HI20 == reloc_info[0].type))
{ {
frag_wane (frag_now); frag_wane (frag_now);
frag_new (0); frag_new (0);
@ -1470,6 +1471,9 @@ loongarch_pre_output_hook (void)
const frchainS *frch; const frchainS *frch;
segT s; segT s;
if (!LARCH_opts.relax)
return;
/* Save the current segment info. */ /* Save the current segment info. */
segT seg = now_seg; segT seg = now_seg;
subsegT subseg = now_subseg; subsegT subseg = now_subseg;
@ -1665,7 +1669,8 @@ loongarch_md_finish (void)
{ {
/* Insert relocations for uleb128 directives, so the values can be recomputed /* Insert relocations for uleb128 directives, so the values can be recomputed
at link time. */ at link time. */
bfd_map_over_sections (stdoutput, loongarch_insert_uleb128_fixes, NULL); if (LARCH_opts.relax)
bfd_map_over_sections (stdoutput, loongarch_insert_uleb128_fixes, NULL);
} }
void void

24
gas/config/tc-loongarch.h
View File

@ -21,6 +21,8 @@
#ifndef TC_LOONGARCH #ifndef TC_LOONGARCH
#define TC_LOONGARCH #define TC_LOONGARCH
#include "opcode/loongarch.h"
#define TARGET_BYTES_BIG_ENDIAN 0 #define TARGET_BYTES_BIG_ENDIAN 0
#define TARGET_ARCH bfd_arch_loongarch #define TARGET_ARCH bfd_arch_loongarch
@ -57,23 +59,33 @@ extern bool loongarch_frag_align_code (int);
/* The following two macros let the linker resolve all the relocs /* The following two macros let the linker resolve all the relocs
due to relaxation. due to relaxation.
This is called to see whether a reloc against a defined symbol This is called to see whether a reloc against a defined symbol
should be converted into a reloc against a section. */ should be converted into a reloc against a section.
If relax and norelax have different value may cause ld ".eh_frame_hdr
refers to overlapping FDEs" error when link relax .o and norelax .o. */
#define tc_fix_adjustable(fixp) 0 #define tc_fix_adjustable(fixp) 0
/* The difference between same-section symbols may be affected by linker
/* Tne difference between same-section symbols may be affected by linker
relaxation, so do not resolve such expressions in the assembler. */ relaxation, so do not resolve such expressions in the assembler. */
#define md_allow_local_subtract(l,r,s) 0 #define md_allow_local_subtract(l,r,s) 0
/* Values passed to md_apply_fix don't include symbol values. */ /* Values passed to md_apply_fix don't include symbol values. */
#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
#define TC_VALIDATE_FIX_SUB(FIX, SEG) 1 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
#define DIFF_EXPR_OK 1 #define DIFF_EXPR_OK 1
/* Postpone text-section label subtraction calculation until linking, since
linker relaxations might change the deltas. */
#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \ #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
(GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEC) \ (LARCH_opts.relax ? \
|| ((SEC)->flags & SEC_CODE) != 0 \ (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEC) \
|| ((SEC)->flags & SEC_DEBUGGING) != 0 \ || ((SEC)->flags & SEC_CODE) != 0 \
|| TC_FORCE_RELOCATION (FIX)) || ((SEC)->flags & SEC_DEBUGGING) != 0 \
|| TC_FORCE_RELOCATION (FIX)) \
: (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEC))) \
#define TC_LINKRELAX_FIXUP(seg) ((seg->flags & SEC_CODE) \ #define TC_LINKRELAX_FIXUP(seg) ((seg->flags & SEC_CODE) \
|| (seg->flags & SEC_DEBUGGING)) || (seg->flags & SEC_DEBUGGING))