diff options
| author | mengqinggang <mengqinggang@loongson.cn> | 2023-11-16 19:19:14 +0800 |
|---|---|---|
| committer | liuzhensong <liuzhensong@loongson.cn> | 2024-01-30 14:49:52 +0800 |
| commit | 3e4549544ab5ae36bc956bdc19626329e64c468a (patch) | |
| tree | 3fb54a84d0d890593a3f8264262591ba5e595600 /bfd | |
| parent | 94960997cbd6f6e96bcca2da6d57744476059df5 (diff) | |
| download | gdb-3e4549544ab5ae36bc956bdc19626329e64c468a.zip gdb-3e4549544ab5ae36bc956bdc19626329e64c468a.tar.gz gdb-3e4549544ab5ae36bc956bdc19626329e64c468a.tar.bz2 | |
LoongArch: Remove "elf_seg_map (info->output_bfd) == NULL" relaxation condition
Previously the condition prevented shared objects from being relaxed.
To remove the limitation, we need to update program header size and
.eh_frame_hdr size before relaxation.
(cherry picked from commit 4f2469d0cdd0f3bd1d9040521e002e8df0a63a98)
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/elfnn-loongarch.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/bfd/elfnn-loongarch.c b/bfd/elfnn-loongarch.c index 95240fd..4aea976 100644 --- a/bfd/elfnn-loongarch.c +++ b/bfd/elfnn-loongarch.c @@ -3738,7 +3738,7 @@ loongarch_relax_delete_bytes (bfd *abfd, /* Relax pcalau12i,addi.d => pcaddi. */ static bool -loongarch_relax_pcala_addi (bfd *abfd, asection *sec, +loongarch_relax_pcala_addi (bfd *abfd, asection *sec, asection *sym_sec, Elf_Internal_Rela *rel_hi, bfd_vma symval, struct bfd_link_info *info, bool *again) { @@ -3747,7 +3747,24 @@ loongarch_relax_pcala_addi (bfd *abfd, asection *sec, uint32_t pca = bfd_get (32, abfd, contents + rel_hi->r_offset); uint32_t add = bfd_get (32, abfd, contents + rel_lo->r_offset); uint32_t rd = pca & 0x1f; + + /* This section's output_offset need to subtract the bytes of instructions + relaxed by the previous sections, so it needs to be updated beforehand. + size_input_section already took care of updating it after relaxation, + so we additionally update once here. */ + sec->output_offset = sec->output_section->size; bfd_vma pc = sec_addr (sec) + rel_hi->r_offset; + + /* If pc and symbol not in the same segment, add/sub segment alignment. + FIXME: if there are multiple readonly segments? */ + if (!(sym_sec->flags & SEC_READONLY)) + { + if (symval > pc) + pc -= info->maxpagesize; + else if (symval < pc) + pc += info->maxpagesize; + } + const uint32_t addi_d = 0x02c00000; const uint32_t pcaddi = 0x18000000; @@ -3889,7 +3906,6 @@ loongarch_elf_relax_section (bfd *abfd, asection *sec, || sec->sec_flg0 || (sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0 - || elf_seg_map (info->output_bfd) == NULL || (info->disable_target_specific_optimizations && info->relax_pass == 0) /* The exp_seg_relro_adjust is enum phase_enum (0x4), @@ -4009,14 +4025,15 @@ loongarch_elf_relax_section (bfd *abfd, asection *sec, break; case R_LARCH_PCALA_HI20: if (0 == info->relax_pass && (i + 4) <= sec->reloc_count) - loongarch_relax_pcala_addi (abfd, sec, rel, symval, info, again); + loongarch_relax_pcala_addi (abfd, sec, sym_sec, rel, symval, + info, again); break; case R_LARCH_GOT_PC_HI20: if (local_got && 0 == info->relax_pass && (i + 4) <= sec->reloc_count) { if (loongarch_relax_pcala_ld (abfd, sec, rel)) - loongarch_relax_pcala_addi (abfd, sec, rel, symval, + loongarch_relax_pcala_addi (abfd, sec, sym_sec, rel, symval, info, again); } break; |