LoongArch: Modify inconsistent behavior of ld with --unresolved-symbols=ignore-all
Checks
Commit Message
Ignore errors when producing executable files that reference external symbols defined
in other files.
Testcase is:
resolv.c:
int main(int argc, char *argv[]) {
return argc;
}
t.c:
extern const struct my_struct ms1;
static const struct my_struct *ms = &ms1;
t.h:
typedef struct my_struct {
char *str;
int i;
} my_struct;
Compiling and linking command with:
gcc t.c -c ; gcc resolv.c -c
gcc resolv.o t.o -o resolv -Wl,--unresolved-symbols=ignore-all
Got error as:
~/install/usr/bin/ld: t.o:(.data.rel+0x0): undefined reference to `ms1'
collect2: error: ld returned 1 exit status
---
bfd/elfnn-loongarch.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
Comments
在 2024/2/20 下午2:14, Peng Fan 写道:
> Ignore errors when producing executable files that reference external symbols defined
> in other files.
>
> Testcase is:
> resolv.c:
> int main(int argc, char *argv[]) {
> return argc;
> }
>
> t.c:
>
> extern const struct my_struct ms1;
> static const struct my_struct *ms = &ms1;
>
> t.h:
> typedef struct my_struct {
> char *str;
> int i;
> } my_struct;
>
> Compiling and linking command with:
> gcc t.c -c ; gcc resolv.c -c
> gcc resolv.o t.o -o resolv -Wl,--unresolved-symbols=ignore-all
>
> Got error as:
> ~/install/usr/bin/ld: t.o:(.data.rel+0x0): undefined reference to `ms1'
> collect2: error: ld returned 1 exit status
>
> ---
> bfd/elfnn-loongarch.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/bfd/elfnn-loongarch.c b/bfd/elfnn-loongarch.c
> index 1895699af06..6b2d5a7164d 100644
> --- a/bfd/elfnn-loongarch.c
> +++ b/bfd/elfnn-loongarch.c
> @@ -2662,6 +2662,7 @@ loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
> char tls_type;
> bfd_vma relocation, off, ie_off, desc_off;
> int i, j;
> + bool ignored = false;
>
> howto = loongarch_elf_rtype_to_howto (input_bfd, r_type);
> if (howto == NULL || r_type == R_LARCH_GNU_VTINHERIT
> @@ -2703,7 +2704,7 @@ loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
> }
> else
> {
> - bool warned, ignored;
> + bool warned;
>
> RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
> r_symndx, symtab_hdr, sym_hashes,
> @@ -2867,7 +2868,7 @@ loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
> {
> if (h->dynindx == -1)
> {
> - if (h->root.type == bfd_link_hash_undefined)
> + if (h->root.type == bfd_link_hash_undefined && !ignored)
RELOC_FOR_GLOBAL_SYMBOL macro also check undefined symbol, this check can delete directly.
> (*info->callbacks->undefined_symbol)
> (info, name, input_bfd, input_section,
> rel->r_offset, true);
@@ -2662,6 +2662,7 @@ loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
char tls_type;
bfd_vma relocation, off, ie_off, desc_off;
int i, j;
+ bool ignored = false;
howto = loongarch_elf_rtype_to_howto (input_bfd, r_type);
if (howto == NULL || r_type == R_LARCH_GNU_VTINHERIT
@@ -2703,7 +2704,7 @@ loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
}
else
{
- bool warned, ignored;
+ bool warned;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
@@ -2867,7 +2868,7 @@ loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
{
if (h->dynindx == -1)
{
- if (h->root.type == bfd_link_hash_undefined)
+ if (h->root.type == bfd_link_hash_undefined && !ignored)
(*info->callbacks->undefined_symbol)
(info, name, input_bfd, input_section,
rel->r_offset, true);