LoongArch: Modify inconsistent behavior of ld with --unresolved-symbols=ignore-all
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linaro-tcwg-bot/tcwg_binutils_build--master-arm |
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linaro-tcwg-bot/tcwg_binutils_build--master-aarch64 |
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linaro-tcwg-bot/tcwg_binutils_check--master-aarch64 |
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linaro-tcwg-bot/tcwg_binutils_check--master-arm |
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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
Signed-off-by: ticat-fp <fanpeng@loongson.cn>
---
bfd/elfnn-loongarch.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
Comments
On Tue, 2024-02-20 at 10:11 +0800, ticat-fp wrote:
> 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
>
> Signed-off-by: ticat-fp <fanpeng@loongson.cn>
Signed-off-by may have a legal implication so generally we should use
the real name here.
Or if this is done during your working time you don't need a Signed-off-
by as the change should be covered by Loongson corporate FSF assignment.
> ---
> 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)
> (*info->callbacks->undefined_symbol)
> (info, name, input_bfd, input_section,
> rel->r_offset, true);
Got it. I'll resend the v2.
Thanks.
2024-02-20 10:31:17 "Xi Ruoyao" <xry111@xry111.site> 写道:
> On Tue, 2024-02-20 at 10:11 +0800, ticat-fp wrote:
> > 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
> >
> > Signed-off-by: ticat-fp <fanpeng@loongson.cn>
>
> Signed-off-by may have a legal implication so generally we should use
> the real name here.
>
> Or if this is done during your working time you don't need a Signed-off-
> by as the change should be covered by Loongson corporate FSF assignment.
>
> > ---
> > 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)
> > (*info->callbacks->undefined_symbol)
> > (info, name, input_bfd, input_section,
> > rel->r_offset, true);
>
> --
> Xi Ruoyao <xry111@xry111.site>
> School of Aerospace Science and Technology, Xidian University
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@@ -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);