[binutils-gdb] elf.c and elflink.c fixes for commit 68bbe1183379

[Alan Modra]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=389fdfbe0d2aca0af1431ddf34704534dacc48c8

commit 389fdfbe0d2aca0af1431ddf34704534dacc48c8
Author: Alan Modra <amodra@gmail.com>
Date:   Sat Oct 5 10:39:17 2024 +0930

    elf.c and elflink.c fixes for commit 68bbe1183379
    
    Plus some tidies to swap_out_syms.
    
            * elf.c (swap_out_syms): Handle NULL sym name.  Use correct type
            for return of _bfd_elf_strtab_add.  Simplify.
            * elflink.c (bfd_elf_match_symbols_in_sections): Handle NULL
            sym name.

Diff:
---
 bfd/elf.c     | 18 ++++++++----------
 bfd/elflink.c | 24 ++++++++++++++++++------
 2 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/bfd/elf.c b/bfd/elf.c
index 4012d994272..c68d7373b8f 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -8734,21 +8734,21 @@ swap_out_syms (bfd *abfd,
       Elf_Internal_Sym sym;
 
       flagword flags = syms[idx]->flags;
-      if (!name_local_sections
-	  && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
+      if (syms[idx]->name == NULL
+	  || (!name_local_sections
+	      && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM))
 	{
 	  /* Local section symbols have no name.  */
-	  sym.st_name = (unsigned long) -1;
+	  sym.st_name = 0;
 	}
       else
 	{
 	  /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
 	     to get the final offset for st_name.  */
-	  sym.st_name
-	    = (unsigned long) _bfd_elf_strtab_add (stt, syms[idx]->name,
-						   false);
-	  if (sym.st_name == (unsigned long) -1)
+	  size_t stridx = _bfd_elf_strtab_add (stt, syms[idx]->name, false);
+	  if (stridx == (size_t) -1)
 	    goto error_return;
+	  sym.st_name = stridx;
 	}
 
       bfd_vma value = syms[idx]->value;
@@ -8959,9 +8959,7 @@ Unable to handle section index %x in ELF symbol.  Using ABS instead."),
   for (idx = 0; idx < outbound_syms_index; idx++)
     {
       struct elf_sym_strtab *elfsym = &symstrtab[idx];
-      if (elfsym->sym.st_name == (unsigned long) -1)
-	elfsym->sym.st_name = 0;
-      else
+      if (elfsym->sym.st_name != 0)
 	elfsym->sym.st_name = _bfd_elf_strtab_offset (stt,
 						      elfsym->sym.st_name);
       if (info && info->callbacks->ctf_new_symbol)
diff --git a/bfd/elflink.c b/bfd/elflink.c
index 9eb1122d513..a498dbb12a6 100644
--- a/bfd/elflink.c
+++ b/bfd/elflink.c
@@ -8819,6 +8819,8 @@ bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2,
 	    symp->name = bfd_elf_string_from_elf_section (bfd1,
 							  hdr1->sh_link,
 							  ssym->st_name);
+	    if (symp->name == NULL)
+	      goto done;
 	    symp++;
 	  }
 
@@ -8832,6 +8834,8 @@ bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2,
 	    symp->name = bfd_elf_string_from_elf_section (bfd2,
 							  hdr2->sh_link,
 							  ssym->st_name);
+	    if (symp->name == NULL)
+	      goto done;
 	    symp++;
 	  }
 
@@ -8878,14 +8882,22 @@ bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2,
     goto done;
 
   for (i = 0; i < count1; i++)
-    symtable1[i].name
-      = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link,
-					 symtable1[i].u.isym->st_name);
+    {
+      symtable1[i].name
+	= bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link,
+					   symtable1[i].u.isym->st_name);
+      if (symtable1[i].name == NULL)
+	goto done;
+    }
 
   for (i = 0; i < count2; i++)
-    symtable2[i].name
-      = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link,
-					 symtable2[i].u.isym->st_name);
+    {
+      symtable2[i].name
+	= bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link,
+					   symtable2[i].u.isym->st_name);
+      if (symtable2[i].name == NULL)
+	goto done;
+    }
 
   /* Sort symbol by name.  */
   qsort (symtable1, count1, sizeof (struct elf_symbol),