2012-07-24 Teresa Johnson <tejohnson@google.com>

bfd/
	* bfd.c (bfd_find_nearest_line_discriminator): New macro.
	* coff-rs6000.c: Init _bfd_find_nearest_line_discriminator.
	* coff64-rs6000.c: Likewise.
	* dwarf2.c (struct line_info): Add discriminator field.
	(add_line_info): Fill in new discriminator field.
	(decode_line_info): Record discriminator information instead
        of ignoring it.
	(lookup_address_in_line_info_table): Return discriminator field if
        requested.
	(comp_unit_find_nearest_line): Add discriminator argument.
	(find_line): Likewise.
	(_bfd_dwarf2_find_nearest_line): Likewise.
	(_bfd_dwarf2_find_line): Likewise.
	* elf-bfd.h (_bfd_elf_find_nearest_line_discriminator): New.
        (_bfd_elf_find_line_discriminator): Likewise.
        (_bfd_generic_find_nearest_line_discriminator): Likewise. Defined.
	* elf.c (_bfd_elf_find_nearest_line): Change to a wrapper
        that invokes _bfd_elf_find_nearest_line_discriminator with correct
        arguments.
	(_bfd_elf_find_nearest_line_discriminator): New.
	(_bfd_elf_find_line): Change to a wrapper
        that invokes _bfd_elf_find_line_discriminator with correct
        arguments.
	(_bfd_elf_find_line_discriminator): New.
	* coffgen.c (coff_find_nearest_line_with_names): Handle
        new discriminator argument.
	* elf32-arm.c (elf32_arm_find_nearest_line): Likewise.
	* elf64-alpha.c (elf64_alpha_find_nearest_line): Likewise.
	* elfxx-mips.c (_bfd_mips_elf_find_nearest_line): Likewise.
	* mach-o.c (bfd_mach_o_find_nearest_line): Likewise.
	* libbfd-in.h (_bfd_dwarf2_find_nearest_line): Add discriminator
        argument.
        (_bfd_dwarf2_find_line): Likewise.
        (_bfd_generic_find_nearest_line_discriminator): New.
	* libbfd.c (_bfd_generic_find_nearest_line_discriminator): New.
	* bfd-in2.h: Regenerated.
	* libbfd.h: Likewise.
	* targets.c (BFD_JUMP_TABLE_SYMBOLS): Initialize
        _bfd_find_nearest_line_discriminator with
        _bfd_generic_find_nearest_line_discriminator.
        (bfd_target): Add _bfd_find_nearest_line_discriminator.

binutils/
	* addr2line.c (find_address_in_section): Invoke
        bfd_find_nearest_line_discriminator to get the discriminator.
	(find_offset_in_section): Likewise.
	(translate_addresses): Print discriminator if it is non-zero.
	* objdump.c (show_line): Invoke
        bfd_find_nearest_line_discriminator to get the discriminator,
        and keep track of prev_discriminator. Print discriminator
        if it is non-zero.
	(disassemble_data): Initialize prev_discriminator.
	(dump_reloc_set): Invoke bfd_find_nearest_line_discriminator
        to get the discriminator, and keep track of last_discriminator.
        Print discriminator if it is non-zero.

17 files changed, 164 insertions, 21 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 76665c3..b958889 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,47 @@
+2012-07-24  Teresa Johnson  <tejohnson@google.com>
+
+	* bfd.c (bfd_find_nearest_line_discriminator): New macro.
+	* coff-rs6000.c: Init _bfd_find_nearest_line_discriminator.
+	* coff64-rs6000.c: Likewise.
+	* dwarf2.c (struct line_info): Add discriminator field.
+	(add_line_info): Fill in new discriminator field.
+	(decode_line_info): Record discriminator information instead
+        of ignoring it.
+	(lookup_address_in_line_info_table): Return discriminator field if
+        requested.
+	(comp_unit_find_nearest_line): Add discriminator argument.
+	(find_line): Likewise.
+	(_bfd_dwarf2_find_nearest_line): Likewise.
+	(_bfd_dwarf2_find_line): Likewise.
+	* elf-bfd.h (_bfd_elf_find_nearest_line_discriminator): New.
+        (_bfd_elf_find_line_discriminator): Likewise.
+        (_bfd_generic_find_nearest_line_discriminator): Likewise. Defined.
+	* elf.c (_bfd_elf_find_nearest_line): Change to a wrapper
+        that invokes _bfd_elf_find_nearest_line_discriminator with correct
+        arguments.
+	(_bfd_elf_find_nearest_line_discriminator): New.
+	(_bfd_elf_find_line): Change to a wrapper
+        that invokes _bfd_elf_find_line_discriminator with correct
+        arguments.
+	(_bfd_elf_find_line_discriminator): New.
+	* coffgen.c (coff_find_nearest_line_with_names): Handle
+        new discriminator argument.
+	* elf32-arm.c (elf32_arm_find_nearest_line): Likewise.
+	* elf64-alpha.c (elf64_alpha_find_nearest_line): Likewise.
+	* elfxx-mips.c (_bfd_mips_elf_find_nearest_line): Likewise.
+	* mach-o.c (bfd_mach_o_find_nearest_line): Likewise.
+	* libbfd-in.h (_bfd_dwarf2_find_nearest_line): Add discriminator
+        argument.
+        (_bfd_dwarf2_find_line): Likewise.
+        (_bfd_generic_find_nearest_line_discriminator): New.
+	* libbfd.c (_bfd_generic_find_nearest_line_discriminator): New.
+	* bfd-in2.h: Regenerated.
+	* libbfd.h: Likewise.
+	* targets.c (BFD_JUMP_TABLE_SYMBOLS): Initialize
+        _bfd_find_nearest_line_discriminator with
+        _bfd_generic_find_nearest_line_discriminator.
+        (bfd_target): Add _bfd_find_nearest_line_discriminator.
+
 2012-07-24  Sean Keys  <skeys@ipdatasys.com>
 
         * elf32-m68hc1x.c (elf32_m68hc11_relocate_section): Added code
diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index 7a90a44..c7ce4cc 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -5810,6 +5810,11 @@ bfd_boolean bfd_set_private_flags (bfd *abfd, flagword flags);
        BFD_SEND (abfd, _bfd_find_nearest_line, \
                  (abfd, sec, syms, off, file, func, line))
 
+#define bfd_find_nearest_line_discriminator(abfd, sec, syms, off, file, func, \
+                                            line, disc) \
+       BFD_SEND (abfd, _bfd_find_nearest_line_discriminator, \
+                 (abfd, sec, syms, off, file, func, line, disc))
+
 #define bfd_find_line(abfd, syms, sym, file, line) \
        BFD_SEND (abfd, _bfd_find_line, \
                  (abfd, syms, sym, file, line))
@@ -6191,6 +6196,7 @@ typedef struct bfd_target
   NAME##_bfd_is_target_special_symbol, \
   NAME##_get_lineno, \
   NAME##_find_nearest_line, \
+  _bfd_generic_find_nearest_line_discriminator, \
   _bfd_generic_find_line, \
   NAME##_find_inliner_info, \
   NAME##_bfd_make_debug_symbol, \
@@ -6214,6 +6220,9 @@ typedef struct bfd_target
   bfd_boolean (*_bfd_find_nearest_line)
     (bfd *, struct bfd_section *, struct bfd_symbol **, bfd_vma,
      const char **, const char **, unsigned int *);
+  bfd_boolean (*_bfd_find_nearest_line_discriminator)
+    (bfd *, struct bfd_section *, struct bfd_symbol **, bfd_vma,
+     const char **, const char **, unsigned int *, unsigned int *);
   bfd_boolean (*_bfd_find_line)
     (bfd *, struct bfd_symbol **, struct bfd_symbol *,
      const char **, unsigned int *);
diff --git a/bfd/bfd.c b/bfd/bfd.c
index 640b420..eed1896 100644
--- a/bfd/bfd.c
+++ b/bfd/bfd.c
@@ -1424,6 +1424,11 @@ DESCRIPTION
 .       BFD_SEND (abfd, _bfd_find_nearest_line, \
 .                 (abfd, sec, syms, off, file, func, line))
 .
+.#define bfd_find_nearest_line_discriminator(abfd, sec, syms, off, file, func, \
+.                                            line, disc) \
+.       BFD_SEND (abfd, _bfd_find_nearest_line_discriminator, \
+.                 (abfd, sec, syms, off, file, func, line, disc))
+.
 .#define bfd_find_line(abfd, syms, sym, file, line) \
 .       BFD_SEND (abfd, _bfd_find_line, \
 .                 (abfd, syms, sym, file, line))
diff --git a/bfd/coff-rs6000.c b/bfd/coff-rs6000.c
index 2a968bf..9326b32 100644
--- a/bfd/coff-rs6000.c
+++ b/bfd/coff-rs6000.c
@@ -4118,6 +4118,7 @@ const bfd_target rs6000coff_vec =
     coff_bfd_is_target_special_symbol,
     coff_get_lineno,
     xcoff_find_nearest_line,
+    _bfd_generic_find_nearest_line_discriminator,
     _bfd_generic_find_line,
     coff_find_inliner_info,
     coff_bfd_make_debug_symbol,
@@ -4373,6 +4374,7 @@ const bfd_target pmac_xcoff_vec =
     coff_bfd_is_target_special_symbol,
     coff_get_lineno,
     xcoff_find_nearest_line,
+    _bfd_generic_find_nearest_line_discriminator,
     _bfd_generic_find_line,
     coff_find_inliner_info,
     coff_bfd_make_debug_symbol,
diff --git a/bfd/coff64-rs6000.c b/bfd/coff64-rs6000.c
index 031385d..0821b6f 100644
--- a/bfd/coff64-rs6000.c
+++ b/bfd/coff64-rs6000.c
@@ -2710,6 +2710,7 @@ const bfd_target rs6000coff64_vec =
     coff_bfd_is_target_special_symbol,
     coff_get_lineno,
     coff_find_nearest_line,
+    _bfd_generic_find_nearest_line_discriminator,
     _bfd_generic_find_line,
     coff_find_inliner_info,
     coff_bfd_make_debug_symbol,
@@ -2967,6 +2968,7 @@ const bfd_target aix5coff64_vec =
     coff_bfd_is_target_special_symbol,
     coff_get_lineno,
     coff_find_nearest_line,
+    _bfd_generic_find_nearest_line_discriminator,
     _bfd_generic_find_line,
     coff_find_inliner_info,
     coff_bfd_make_debug_symbol,
diff --git a/bfd/coffgen.c b/bfd/coffgen.c
index c0505c6..509119b 100644
--- a/bfd/coffgen.c
+++ b/bfd/coffgen.c
@@ -2153,7 +2153,7 @@ coff_find_nearest_line_with_names (bfd *abfd,
   if (_bfd_dwarf2_find_nearest_line (abfd, debug_sections,
                                      section, symbols, offset,
 				     filename_ptr, functionname_ptr,
-				     line_ptr, 0,
+				     line_ptr, NULL, 0,
 				     &coff_data(abfd)->dwarf2_find_line_info))
     return TRUE;
 
diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
index d31b849..069d614 100644
--- a/bfd/dwarf2.c
+++ b/bfd/dwarf2.c
@@ -980,6 +980,7 @@ struct line_info
   char *filename;
   unsigned int line;
   unsigned int column;
+  unsigned int discriminator;
   unsigned char op_index;
   unsigned char end_sequence;		/* End of (sequential) code sequence.  */
 };
@@ -1080,6 +1081,7 @@ add_line_info (struct line_info_table *table,
 	       char *filename,
 	       unsigned int line,
 	       unsigned int column,
+	       unsigned int discriminator,
 	       int end_sequence)
 {
   bfd_size_type amt = sizeof (struct line_info);
@@ -1095,6 +1097,7 @@ add_line_info (struct line_info_table *table,
   info->op_index = op_index;
   info->line = line;
   info->column = column;
+  info->discriminator = discriminator;
   info->end_sequence = end_sequence;
 
   if (filename && filename[0])
@@ -1573,6 +1576,7 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
       char * filename = table->num_files ? concat_filename (table, 1) : NULL;
       unsigned int line = 1;
       unsigned int column = 0;
+      unsigned int discriminator = 0;
       int is_stmt = lh.default_is_stmt;
       int end_sequence = 0;
       /* eraxxon@alumni.rice.edu: Against the DWARF2 specs, some
@@ -1607,8 +1611,9 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
 	      line += lh.line_base + (adj_opcode % lh.line_range);
 	      /* Append row to matrix using current values.  */
 	      if (!add_line_info (table, address, op_index, filename,
-				  line, column, 0))
+				  line, column, discriminator, 0))
 		goto line_fail;
+              discriminator = 0;
 	      if (address < low_pc)
 		low_pc = address;
 	      if (address > high_pc)
@@ -1626,9 +1631,10 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
 		{
 		case DW_LNE_end_sequence:
 		  end_sequence = 1;
-		  if (!add_line_info (table, address, op_index, filename,
-				      line, column, end_sequence))
+		  if (!add_line_info (table, address, op_index, filename, line,
+				      column, discriminator, end_sequence))
 		    goto line_fail;
+                  discriminator = 0;
 		  if (address < low_pc)
 		    low_pc = address;
 		  if (address > high_pc)
@@ -1668,7 +1674,8 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
 		  table->num_files++;
 		  break;
 		case DW_LNE_set_discriminator:
-		  (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+		  discriminator =
+                      read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
 		  line_ptr += bytes_read;
 		  break;
 		case DW_LNE_HP_source_file_correlation:
@@ -1686,8 +1693,9 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
 	      break;
 	    case DW_LNS_copy:
 	      if (!add_line_info (table, address, op_index,
-				  filename, line, column, 0))
+				  filename, line, column, discriminator, 0))
 		goto line_fail;
+              discriminator = 0;
 	      if (address < low_pc)
 		low_pc = address;
 	      if (address > high_pc)
@@ -1788,7 +1796,8 @@ static bfd_boolean
 lookup_address_in_line_info_table (struct line_info_table *table,
 				   bfd_vma addr,
 				   const char **filename_ptr,
-				   unsigned int *linenumber_ptr)
+				   unsigned int *linenumber_ptr,
+				   unsigned int *discriminator_ptr)
 {
   struct line_sequence *seq = NULL;
   struct line_info *each_line;
@@ -1823,6 +1832,8 @@ lookup_address_in_line_info_table (struct line_info_table *table,
         {
           *filename_ptr = each_line->filename;
           *linenumber_ptr = each_line->line;
+          if (discriminator_ptr)
+            *discriminator_ptr = each_line->discriminator;
           return TRUE;
         }
     }
@@ -2552,6 +2563,7 @@ comp_unit_find_nearest_line (struct comp_unit *unit,
 			     const char **filename_ptr,
 			     const char **functionname_ptr,
 			     unsigned int *linenumber_ptr,
+			     unsigned int *discriminator_ptr,
 			     struct dwarf2_debug *stash)
 {
   bfd_boolean line_p;
@@ -2592,7 +2604,8 @@ comp_unit_find_nearest_line (struct comp_unit *unit,
     stash->inliner_chain = function;
   line_p = lookup_address_in_line_info_table (unit->line_table, addr,
 					      filename_ptr,
-					      linenumber_ptr);
+					      linenumber_ptr,
+					      discriminator_ptr);
   return line_p || func_p;
 }
 
@@ -3308,6 +3321,7 @@ find_line (bfd *abfd,
 	   const char **filename_ptr,
 	   const char **functionname_ptr,
 	   unsigned int *linenumber_ptr,
+	   unsigned int *discriminator_ptr,
 	   unsigned int addr_size,
 	   void **pinfo)
 {
@@ -3419,6 +3433,7 @@ find_line (bfd *abfd,
 						   filename_ptr,
 						   functionname_ptr,
 						   linenumber_ptr,
+						   discriminator_ptr,
 						   stash));
 	  if (found)
 	    goto done;
@@ -3512,6 +3527,7 @@ find_line (bfd *abfd,
 						     filename_ptr,
 						     functionname_ptr,
 						     linenumber_ptr,
+						     discriminator_ptr,
 						     stash));
 
 	  if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr)
@@ -3546,12 +3562,13 @@ _bfd_dwarf2_find_nearest_line (bfd *abfd,
 			       const char **filename_ptr,
 			       const char **functionname_ptr,
 			       unsigned int *linenumber_ptr,
+                               unsigned int *discriminator_ptr,
 			       unsigned int addr_size,
 			       void **pinfo)
 {
   return find_line (abfd, debug_sections, section, offset, NULL, symbols,
-                    filename_ptr, functionname_ptr, linenumber_ptr, addr_size,
-		    pinfo);
+                    filename_ptr, functionname_ptr, linenumber_ptr,
+                    discriminator_ptr, addr_size, pinfo);
 }
 
 /* The DWARF2 version of find_line.
@@ -3563,11 +3580,13 @@ _bfd_dwarf2_find_line (bfd *abfd,
 		       asymbol *symbol,
 		       const char **filename_ptr,
 		       unsigned int *linenumber_ptr,
+                       unsigned int *discriminator_ptr,
 		       unsigned int addr_size,
 		       void **pinfo)
 {
   return find_line (abfd, dwarf_debug_sections, NULL, 0, symbol, symbols,
-                    filename_ptr, NULL, linenumber_ptr, addr_size, pinfo);
+                    filename_ptr, NULL, linenumber_ptr, discriminator_ptr,
+                    addr_size, pinfo);
 }
 
 bfd_boolean
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h
index 889ce12..ff0e615 100644
--- a/bfd/elf-bfd.h
+++ b/bfd/elf-bfd.h
@@ -1876,9 +1876,16 @@ extern bfd_boolean _bfd_elf_set_arch_mach
 extern bfd_boolean _bfd_elf_find_nearest_line
   (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
    unsigned int *);
+extern bfd_boolean _bfd_elf_find_nearest_line_discriminator
+  (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
+   unsigned int *, unsigned int *);
 extern bfd_boolean _bfd_elf_find_line
   (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
+extern bfd_boolean _bfd_elf_find_line_discriminator
+  (bfd *, asymbol **, asymbol *, const char **, unsigned int *, unsigned int *);
 #define _bfd_generic_find_line _bfd_elf_find_line
+#define _bfd_generic_find_nearest_line_discriminator \
+        _bfd_elf_find_nearest_line_discriminator
 extern bfd_boolean _bfd_elf_find_inliner_info
   (bfd *, const char **, const char **, unsigned int *);
 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
diff --git a/bfd/elf.c b/bfd/elf.c
index 48e5d68..0ac4032 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -7567,6 +7567,23 @@ _bfd_elf_find_nearest_line (bfd *abfd,
 			    const char **functionname_ptr,
 			    unsigned int *line_ptr)
 {
+  return _bfd_elf_find_nearest_line_discriminator (abfd, section, symbols,
+                                                   offset, filename_ptr,
+                                                   functionname_ptr,
+                                                   line_ptr,
+                                                   NULL);
+}
+
+bfd_boolean
+_bfd_elf_find_nearest_line_discriminator (bfd *abfd,
+                                          asection *section,
+                                          asymbol **symbols,
+                                          bfd_vma offset,
+                                          const char **filename_ptr,
+                                          const char **functionname_ptr,
+                                          unsigned int *line_ptr,
+                                          unsigned int *discriminator_ptr)
+{
   bfd_boolean found;
 
   if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
@@ -7584,7 +7601,7 @@ _bfd_elf_find_nearest_line (bfd *abfd,
   if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
                                      section, symbols, offset,
 				     filename_ptr, functionname_ptr,
-				     line_ptr, 0,
+				     line_ptr, discriminator_ptr, 0,
 				     &elf_tdata (abfd)->dwarf2_find_line_info))
     {
       if (!*functionname_ptr)
@@ -7620,8 +7637,19 @@ bfd_boolean
 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
 		    const char **filename_ptr, unsigned int *line_ptr)
 {
+  return _bfd_elf_find_line_discriminator (abfd, symbols, symbol,
+		                           filename_ptr, line_ptr,
+                                           NULL);
+}
+
+bfd_boolean
+_bfd_elf_find_line_discriminator (bfd *abfd, asymbol **symbols, asymbol *symbol,
+                                  const char **filename_ptr,
+                                  unsigned int *line_ptr,
+                                  unsigned int *discriminator_ptr)
+{
   return _bfd_dwarf2_find_line (abfd, symbols, symbol,
-				filename_ptr, line_ptr, 0,
+				filename_ptr, line_ptr, discriminator_ptr, 0,
 				&elf_tdata (abfd)->dwarf2_find_line_info);
 }
 
diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index bc1f195..1bbd96c 100644
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -12886,7 +12886,7 @@ elf32_arm_find_nearest_line (bfd *          abfd,
   if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
                                      section, symbols, offset,
 				     filename_ptr, functionname_ptr,
-				     line_ptr, 0,
+				     line_ptr, NULL, 0,
 				     & elf_tdata (abfd)->dwarf2_find_line_info))
     {
       if (!*functionname_ptr)
diff --git a/bfd/elf64-alpha.c b/bfd/elf64-alpha.c
index 40e4bfb..deb03c1 100644
--- a/bfd/elf64-alpha.c
+++ b/bfd/elf64-alpha.c
@@ -1452,7 +1452,7 @@ elf64_alpha_find_nearest_line (bfd *abfd, asection *section, asymbol **symbols,
   if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
                                      section, symbols, offset,
 				     filename_ptr, functionname_ptr,
-				     line_ptr, 0,
+				     line_ptr, NULL, 0,
 				     &elf_tdata (abfd)->dwarf2_find_line_info))
     return TRUE;
 
diff --git a/bfd/elfxx-mips.c b/bfd/elfxx-mips.c
index 9478f16..9fef8ef 100644
--- a/bfd/elfxx-mips.c
+++ b/bfd/elfxx-mips.c
@@ -11709,7 +11709,7 @@ _bfd_mips_elf_find_nearest_line (bfd *abfd, asection *section,
   if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
                                      section, symbols, offset,
 				     filename_ptr, functionname_ptr,
-				     line_ptr, ABI_64_P (abfd) ? 8 : 0,
+				     line_ptr, NULL, ABI_64_P (abfd) ? 8 : 0,
 				     &elf_tdata (abfd)->dwarf2_find_line_info))
     return TRUE;
 
diff --git a/bfd/libbfd-in.h b/bfd/libbfd-in.h
index baffaea..c424fe2 100644
--- a/bfd/libbfd-in.h
+++ b/bfd/libbfd-in.h
@@ -540,16 +540,21 @@ extern const struct dwarf_debug_section dwarf_debug_sections[];
 /* Find the nearest line using DWARF 2 debugging information.  */
 extern bfd_boolean _bfd_dwarf2_find_nearest_line
   (bfd *, const struct dwarf_debug_section *, asection *, asymbol **, bfd_vma,
-   const char **, const char **, unsigned int *, unsigned int, void **);
+   const char **, const char **, unsigned int *, unsigned int *, unsigned int,
+   void **);
 
 /* Find the line using DWARF 2 debugging information.  */
 extern bfd_boolean _bfd_dwarf2_find_line
   (bfd *, asymbol **, asymbol *, const char **,
-   unsigned int *, unsigned int, void **);
+   unsigned int *, unsigned int *, unsigned int, void **);
 
 bfd_boolean _bfd_generic_find_line
   (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
 
+bfd_boolean _bfd_generic_find_nearest_line_discriminator
+  (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
+   unsigned int *, unsigned int *);
+
 /* Find inliner info after calling bfd_find_nearest_line. */
 extern bfd_boolean _bfd_dwarf2_find_inliner_info
   (bfd *, const char **, const char **, unsigned int *, void **);
diff --git a/bfd/libbfd.c b/bfd/libbfd.c
index 44651cf..553c729 100644
--- a/bfd/libbfd.c
+++ b/bfd/libbfd.c
@@ -1118,6 +1118,19 @@ _bfd_generic_find_line (bfd *abfd ATTRIBUTE_UNUSED,
 }
 
 bfd_boolean
+_bfd_generic_find_nearest_line_discriminator (bfd *abfd ATTRIBUTE_UNUSED,
+                                              asection *section ATTRIBUTE_UNUSED,
+                                              asymbol **symbols ATTRIBUTE_UNUSED,
+                                              bfd_vma offset ATTRIBUTE_UNUSED,
+                                              const char **filename_ptr ATTRIBUTE_UNUSED,
+                                              const char **functionname_ptr ATTRIBUTE_UNUSED,
+                                              unsigned int *line_ptr ATTRIBUTE_UNUSED,
+                                              unsigned int *discriminator_ptr ATTRIBUTE_UNUSED)
+{
+  return FALSE;
+}
+
+bfd_boolean
 _bfd_generic_init_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
 					asection *isec ATTRIBUTE_UNUSED,
 					bfd *obfd ATTRIBUTE_UNUSED,
diff --git a/bfd/libbfd.h b/bfd/libbfd.h
index 1d95fd8..e74ce34 100644
--- a/bfd/libbfd.h
+++ b/bfd/libbfd.h
@@ -545,16 +545,21 @@ extern const struct dwarf_debug_section dwarf_debug_sections[];
 /* Find the nearest line using DWARF 2 debugging information.  */
 extern bfd_boolean _bfd_dwarf2_find_nearest_line
   (bfd *, const struct dwarf_debug_section *, asection *, asymbol **, bfd_vma,
-   const char **, const char **, unsigned int *, unsigned int, void **);
+   const char **, const char **, unsigned int *, unsigned int *, unsigned int,
+   void **);
 
 /* Find the line using DWARF 2 debugging information.  */
 extern bfd_boolean _bfd_dwarf2_find_line
   (bfd *, asymbol **, asymbol *, const char **,
-   unsigned int *, unsigned int, void **);
+   unsigned int *, unsigned int *, unsigned int, void **);
 
 bfd_boolean _bfd_generic_find_line
   (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
 
+bfd_boolean _bfd_generic_find_nearest_line_discriminator
+  (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
+   unsigned int *, unsigned int *);
+
 /* Find inliner info after calling bfd_find_nearest_line. */
 extern bfd_boolean _bfd_dwarf2_find_inliner_info
   (bfd *, const char **, const char **, unsigned int *, void **);
diff --git a/bfd/mach-o.c b/bfd/mach-o.c
index 1f9fc17..84d5a72 100644
--- a/bfd/mach-o.c
+++ b/bfd/mach-o.c
@@ -4836,7 +4836,7 @@ bfd_mach_o_find_nearest_line (bfd *abfd,
   if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
 				     section, symbols, offset,
 				     filename_ptr, functionname_ptr,
-				     line_ptr, 0,
+				     line_ptr, NULL, 0,
 				     &mdata->dwarf2_find_line_info))
     return TRUE;
   return FALSE;
diff --git a/bfd/targets.c b/bfd/targets.c
index cfa91a8..ce1cf35 100644
--- a/bfd/targets.c
+++ b/bfd/targets.c
@@ -369,6 +369,7 @@ BFD_JUMP_TABLE macros.
 .  NAME##_bfd_is_target_special_symbol, \
 .  NAME##_get_lineno, \
 .  NAME##_find_nearest_line, \
+.  _bfd_generic_find_nearest_line_discriminator, \
 .  _bfd_generic_find_line, \
 .  NAME##_find_inliner_info, \
 .  NAME##_bfd_make_debug_symbol, \
@@ -392,6 +393,9 @@ BFD_JUMP_TABLE macros.
 .  bfd_boolean (*_bfd_find_nearest_line)
 .    (bfd *, struct bfd_section *, struct bfd_symbol **, bfd_vma,
 .     const char **, const char **, unsigned int *);
+.  bfd_boolean (*_bfd_find_nearest_line_discriminator)
+.    (bfd *, struct bfd_section *, struct bfd_symbol **, bfd_vma,
+.     const char **, const char **, unsigned int *, unsigned int *);
 .  bfd_boolean (*_bfd_find_line)
 .    (bfd *, struct bfd_symbol **, struct bfd_symbol *,
 .     const char **, unsigned int *);