[PATCH] C-SKY: Fix machine flag.

[PATCH] C-SKY: Fix machine flag.

[Xianmiao Qu]

bfd/
	* elf32-csky.c (elf32_csky_merge_attributes): Don't save
	and restore the ARCH attribute, it will actually clear
	the ARCH attribute.
	(csky_elf_merge_private_bfd_data): Store the machine flag
	correctly.
---
 bfd/elf32-csky.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/bfd/elf32-csky.c b/bfd/elf32-csky.c
index 7e03a3bc44d..7c2bd5dd8c0 100644
--- a/bfd/elf32-csky.c
+++ b/bfd/elf32-csky.c
@@ -2892,16 +2892,8 @@ elf32_csky_merge_attributes (bfd *ibfd, struct bfd_link_info *info)
       /* This is the first object.  Copy the attributes.  */
       out_attr = elf_known_obj_attributes_proc (obfd);
 
-      /* If Tag_CSKY_CPU_NAME is already set, save it.  */
-      memcpy (&tattr, &out_attr[Tag_CSKY_ARCH_NAME], sizeof (tattr));
-
       _bfd_elf_copy_obj_attributes (ibfd, obfd);
 
-      out_attr = elf_known_obj_attributes_proc (obfd);
-
-      /* Restore Tag_CSKY_CPU_NAME.  */
-      memcpy (&out_attr[Tag_CSKY_ARCH_NAME], &tattr, sizeof (tattr));
-
       /* Use the Tag_null value to indicate the attributes have been
 	 initialized.  */
       out_attr[0].i = 1;
@@ -3067,11 +3059,12 @@ csky_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
   out_attr = elf_known_obj_attributes_proc (obfd);
 
   /* the flags like"e , f ,g ..." , we take collection.  */
-  newest_flag = (old_flags & (~CSKY_ARCH_MASK))
-   | (new_flags & (~CSKY_ARCH_MASK));
+  newest_flag = old_flags | new_flags;
 
   sec_name = get_elf_backend_data (ibfd)->obj_attrs_section;
-  if (bfd_get_section_by_name (ibfd, sec_name) == NULL)
+  if (bfd_get_section_by_name (ibfd, sec_name) == NULL
+      || (new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK) !=
+	  old_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)))
     {
       /* Input BFDs have no ".csky.attribute" section.  */
       new_arch = csky_find_arch_with_eflag (new_flags & CSKY_ARCH_MASK);
@@ -3110,9 +3103,6 @@ csky_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
 	      out_attr[Tag_CSKY_ARCH_NAME].s =
 		_bfd_elf_attr_strdup (obfd, newest_arch->name);
 	    }
-	  else
-	    newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK))
-			    | (old_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)));
 	}
       else
 	{
-- 
2.17.1

Re: [PATCH] C-SKY: Fix machine flag.

[Nick Clifton]

Hi Xianmiao Qu,

> bfd/
> 	* elf32-csky.c (elf32_csky_merge_attributes): Don't save
> 	and restore the ARCH attribute, it will actually clear
> 	the ARCH attribute.
> 	(csky_elf_merge_private_bfd_data): Store the machine flag
> 	correctly.

Approved and applied.

Cheers
   Nick

Re: [PATCH] C-SKY: Fix machine flag.

[Mark Wielaard]

Hi,

On Tue, 2023-01-17 at 11:49 +0000, Nick Clifton via Binutils wrote:
> Hi Xianmiao Qu,
> 
> > bfd/
> >         * elf32-csky.c (elf32_csky_merge_attributes): Don't save
> >         and restore the ARCH attribute, it will actually clear
> >         the ARCH attribute.
> >         (csky_elf_merge_private_bfd_data): Store the machine flag
> >         correctly.
> 
> Approved and applied.

Note that this broke the build on all arches:
https://builder.sourceware.org/buildbot/#/changes/17260

../../binutils-gdb/bfd/elf32-csky.c: In function
‘elf32_csky_merge_attributes’:
../../binutils-gdb/bfd/elf32-csky.c:2867:17: error: unused variable
‘tattr’ [-Werror=unused-variable]
 2867 |   obj_attribute tattr;
      |                 ^~~~~
../../binutils-gdb/bfd/elf32-csky.c: In function
‘csky_elf_merge_private_bfd_data’:
../../binutils-gdb/bfd/elf32-csky.c:3067:56: error: suggest parentheses
around comparison in operand of ‘&’ [-Werror=parentheses]
 3067 |       || (new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK) !=
      |                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
 3068 |           old_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)))
      |           ~~~~~~~~~                                     
cc1: all warnings being treated as errors
make[3]: *** [Makefile:1765: elf32-csky.lo] Error 1
make[3]: *** Waiting for unfinished jobs....

Re: [PATCH] C-SKY: Fix machine flag.

[Nick Clifton]

Hi Mark,

> Note that this broke the build on all arches:
> https://builder.sourceware.org/buildbot/#/changes/17260

So it did.  Sorry about that.  It should now be fixed, but
it does leave me wondering why my test build did not pick
it up.  I must investigate.

Cheers
   Nick