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author | mengqinggang <mengqinggang@loongson.cn> | 2024-01-24 14:34:26 +0800 |
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committer | liuzhensong <liuzhensong@loongson.cn> | 2024-03-31 14:21:00 +0800 |
commit | daeda14191c1710ce967259a47ef4e0a3fb6eebf (patch) | |
tree | d812149875b5903fde600bb0e71a17f112b81df2 /bfd/elfnn-loongarch.c | |
parent | c7a5bea4c62f286df830418de694821c7617cccd (diff) | |
download | binutils-daeda14191c1710ce967259a47ef4e0a3fb6eebf.zip binutils-daeda14191c1710ce967259a47ef4e0a3fb6eebf.tar.gz binutils-daeda14191c1710ce967259a47ef4e0a3fb6eebf.tar.bz2 |
BFD: Fix the bug of R_LARCH_AGLIN caused by discard section
To represent the first and third expression of .align, R_LARCH_ALIGN need to
associate with a symbol. We define a local symbol for R_LARCH_AGLIN.
But if the section of the local symbol is discarded, it may result in
a undefined symbol error.
Instead, we use the section name symbols, and this does not need to
add extra symbols.
During partial linking (ld -r), if the symbol associated with a relocation is
STT_SECTION type, the addend of relocation needs to add the section output
offset. We prevent it for R_LARCH_ALIGN.
The elf_backend_data.rela_normal only can set all relocations of a target to
rela_normal. Add a new function is_rela_normal to elf_backend_data, it can
set part of relocations to rela_normal.
Diffstat (limited to 'bfd/elfnn-loongarch.c')
-rw-r--r-- | bfd/elfnn-loongarch.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/bfd/elfnn-loongarch.c b/bfd/elfnn-loongarch.c index c42052f..1679aa5 100644 --- a/bfd/elfnn-loongarch.c +++ b/bfd/elfnn-loongarch.c @@ -5454,6 +5454,21 @@ elf_loongarch64_hash_symbol (struct elf_link_hash_entry *h) return _bfd_elf_hash_symbol (h); } +/* If a relocation is rela_normal and the symbol associated with the + relocation is STT_SECTION type, the addend of the relocation would add + sec->output_offset when partial linking (ld -r). + See elf_backend_data.rela_normal and elf_link_input_bfd(). + The addend of R_LARCH_ALIGN is used to represent the first and third + expression of .align, it should be a constant when linking. */ + +static bool +loongarch_elf_is_rela_normal (Elf_Internal_Rela *rel) +{ + if (R_LARCH_ALIGN == ELFNN_R_TYPE (rel->r_info)) + return false; + return true; +} + #define TARGET_LITTLE_SYM loongarch_elfNN_vec #define TARGET_LITTLE_NAME "elfNN-loongarch" #define ELF_ARCH bfd_arch_loongarch @@ -5489,6 +5504,7 @@ elf_loongarch64_hash_symbol (struct elf_link_hash_entry *h) #define elf_backend_grok_psinfo loongarch_elf_grok_psinfo #define elf_backend_hash_symbol elf_loongarch64_hash_symbol #define bfd_elfNN_bfd_relax_section loongarch_elf_relax_section +#define elf_backend_is_rela_normal loongarch_elf_is_rela_normal #define elf_backend_dtrel_excludes_plt 1 |