[binutils-gdb] macho debug changes

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f577746edb4ca2678f69feb5e5848a646d5cd856

commit f577746edb4ca2678f69feb5e5848a646d5cd856
Author: Alan Modra <[email protected]>
Date:   Mon Jun 1 18:28:19 2026 +0930

    macho debug changes
    
    This patch is aimed at fixing "FAIL: eqv involving dot" and any
    similar problems in real code when generating DWARF.
    
            * config/obj-macho.c (obj_mach_o_frob_label),
            (obj_mach_o_frob_symbol): Ignore more debug symbols.
            (obj_mach_o_set_subsections): Ignore SEC_DEBUGGING sections.
            (obj_mach_o_force_reloc_sub_same),
            (obj_mach_o_force_reloc_sub_local),
            (obj_mach_o_force_reloc): Add seg param.  Return false when
            processing debug sections.
            * config/obj-macho.h: Update prototypes.
            * config/tc-i386.h <OBJ_MACHO>: Smuggle section being
            processed by TC_FORCE_RELOCATION* to obj_macho_o functions.

Diff:
---
 gas/config/obj-macho.c | 28 +++++++++++++++++++++-------
 gas/config/obj-macho.h |  6 +++---
 gas/config/tc-i386.h   |  6 +++---
 3 files changed, 27 insertions(+), 13 deletions(-)

diff --git a/gas/config/obj-macho.c b/gas/config/obj-macho.c
index bf6f2758bc7..d0d4763724e 100644
--- a/gas/config/obj-macho.c
+++ b/gas/config/obj-macho.c
@@ -1383,7 +1383,8 @@ void obj_mach_o_frob_label (struct symbol *sp)
 
   s = (bfd_mach_o_asymbol *) symbol_get_bfdsym (sp);
   /* Leave debug symbols alone.  */
-  if ((s->n_type & BFD_MACH_O_N_STAB) != 0)
+  if ((s->n_type & BFD_MACH_O_N_STAB) != 0
+      || (s->symbol.section->flags & SEC_DEBUGGING) != 0)
     return;
 
   /* This is the base symbol type, that we mask in.  */
@@ -1433,7 +1434,8 @@ obj_mach_o_frob_symbol (struct symbol *sp)
 
   s = (bfd_mach_o_asymbol *) symbol_get_bfdsym (sp);
   /* Leave debug symbols alone.  */
-  if ((s->n_type & BFD_MACH_O_N_STAB) != 0)
+  if ((s->n_type & BFD_MACH_O_N_STAB) != 0
+      || (s->symbol.section->flags & SEC_DEBUGGING) != 0)
     return 0;
 
   base_type = obj_mach_o_type_for_symbol (s);
@@ -1570,6 +1572,10 @@ obj_mach_o_set_subsections (bfd *abfd ATTRIBUTE_UNUSED,
   fragS *frag;
   frchainS *chain;
 
+  /* Don't waste time on debug sections.  */
+  if ((sec->flags & SEC_DEBUGGING) != 0)
+    return;
+
   /* Protect against sections not created by gas.  */
   if (seginfo == NULL)
     return;
@@ -1893,17 +1899,22 @@ obj_mach_o_in_different_subsection (symbolS *a, segT aseg, valueT offset,
 }
 
 bool
-obj_mach_o_force_reloc_sub_same (fixS *fix, segT seg)
+obj_mach_o_force_reloc_sub_same (segT seg, fixS *fix, segT addsymseg)
 {
-  if (! SEG_NORMAL (seg))
+  if (!SEG_NORMAL (addsymseg))
     return true;
-  return obj_mach_o_in_different_subsection (fix->fx_addsy, seg,
+  if ((seg->flags & SEC_DEBUGGING) != 0)
+    return false;
+  return obj_mach_o_in_different_subsection (fix->fx_addsy, addsymseg,
 					     fix->fx_offset, fix->fx_subsy);
 }
 
 bool
-obj_mach_o_force_reloc_sub_local (fixS *fix, segT seg ATTRIBUTE_UNUSED)
+obj_mach_o_force_reloc_sub_local (segT seg, fixS *fix,
+				  segT addsymseg ATTRIBUTE_UNUSED)
 {
+  if ((seg->flags & SEC_DEBUGGING) != 0)
+    return false;
   symbolS *fragsym = fix->fx_frag->obj_frag_data.subsection;
   if (fragsym == NULL)
     return false;
@@ -1911,11 +1922,14 @@ obj_mach_o_force_reloc_sub_local (fixS *fix, segT seg ATTRIBUTE_UNUSED)
 }
 
 bool
-obj_mach_o_force_reloc (fixS *fix)
+obj_mach_o_force_reloc (segT seg, fixS *fix)
 {
   if (generic_force_reloc (fix))
     return true;
 
+  if ((seg->flags & SEC_DEBUGGING) != 0)
+    return false;
+
   /* Force a reloc if the target is not in the same subsection.
      FIXME: handle (a - b) where a and b belongs to the same subsection ?  */
   if (fix->fx_addsy != NULL)
diff --git a/gas/config/obj-macho.h b/gas/config/obj-macho.h
index eac0afdf407..0a499f29503 100644
--- a/gas/config/obj-macho.h
+++ b/gas/config/obj-macho.h
@@ -108,8 +108,8 @@ extern int obj_mach_o_allow_local_subtract (expressionS *, expressionS *,
 					    segT);
 
 struct fix;
-extern bool obj_mach_o_force_reloc (struct fix *);
-extern bool obj_mach_o_force_reloc_sub_same (struct fix *, segT);
-extern bool obj_mach_o_force_reloc_sub_local (struct fix *, segT);
+extern bool obj_mach_o_force_reloc (segT, struct fix *);
+extern bool obj_mach_o_force_reloc_sub_same (segT, struct fix *, segT);
+extern bool obj_mach_o_force_reloc_sub_local (segT, struct fix *, segT);
 
 #endif /* _OBJ_MACH_O_H */
diff --git a/gas/config/tc-i386.h b/gas/config/tc-i386.h
index 20e5334d14e..5eaed702ea9 100644
--- a/gas/config/tc-i386.h
+++ b/gas/config/tc-i386.h
@@ -498,13 +498,13 @@ void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 
 #ifdef OBJ_MACH_O
 
-#define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX))
+#define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (this_segment, FIX))
 
 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \
-	  (obj_mach_o_force_reloc_sub_same (FIX, SEG))
+	  (obj_mach_o_force_reloc_sub_same (this_segment, FIX, SEG))
 
 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \
-	(obj_mach_o_force_reloc_sub_local (FIX, SEG))
+	(obj_mach_o_force_reloc_sub_local (this_segment, FIX, SEG))
 
 #endif /* OBJ_MACH_O */