change minsyms not to be relocated at read-time

This removes the runtime offsets from minsyms.  Instead, these offsets
will now be applied whenever the minsym's address is computed.

This patch redefines MSYMBOL_VALUE_ADDRESS to actually use the offsets
from the given objfile.  Then, it updates all the symbol readers,
changing them so that they do not add in the section offset when
creating the symbol.

This change also lets us remove relocation of minsyms from
objfile_relocate1 and also msymbols_sort.

2014-02-26  Tom Tromey  <tromey@redhat.com>

	* minsyms.c (msymbols_sort): Remove.
	* minsyms.h (msymbols_sort): Remove.
	* objfiles.c (objfile_relocate1): Don't relocate minsyms.
	* symtab.h (MSYMBOL_VALUE_ADDRESS): Use objfile offsets.
	* elfread.c (elf_symtab_read): Don't add section offsets.
	* xcoffread.c (record_minimal_symbol): Don't add section offset
	to minimal symbol address.
	* somread.c (text_offset, data_offset): Remove.
	(som_symtab_read): Don't add section offsets to minimal symbol
	addresses.
	* coff-pe-read.c (add_pe_forwarded_sym, read_pe_exported_syms):
	Don't add section offsets to minimal symbols.
	* coffread.c (coff_symtab_read): Don't add section offsets
	to minimal symbol addresses.
	* machoread.c (macho_symtab_add_minsym): Don't add section offset
	to minimal symbol addresses.
	* mipsread.c (read_alphacoff_dynamic_symtab): Don't add
	section offset to minimal symbol addresses.
	* mdebugread.c (parse_partial_symbols): Don't add section
	offset to minimal symbol addresses.
	* dbxread.c (read_dbx_dynamic_symtab): Don't add section
	offset to minimal symbol addresses.

1 files changed, 8 insertions, 16 deletions

diff --git a/gdb/somread.c b/gdb/somread.c
index 79068cd..4a7837e 100644
--- a/gdb/somread.c
+++ b/gdb/somread.c
@@ -57,9 +57,6 @@ som_symtab_read (bfd *abfd, struct objfile *objfile,
   const int symsize = sizeof (struct som_external_symbol_dictionary_record);
 
 
-#define text_offset ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile))
-#define data_offset ANOFFSET (section_offsets, SECT_OFF_DATA (objfile))
-
   number_of_symbols = bfd_get_symcount (abfd);
 
   /* Allocate a buffer to read in the debug info.
@@ -94,7 +91,7 @@ som_symtab_read (bfd *abfd, struct objfile *objfile,
      more accurate to check for a nonzero text offset, but they
      have not provided any information about why that test is
      more accurate.  */
-  dynamic = (text_offset != 0);
+  dynamic = (ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)) != 0);
 
   endbufp = buf + number_of_symbols;
   for (bufp = buf; bufp < endbufp; ++bufp)
@@ -152,7 +149,6 @@ som_symtab_read (bfd *abfd, struct objfile *objfile,
 	    case ST_MILLICODE:
 	      symname = bfd_getb32 (bufp->name) + stringtab;
 	      ms_type = mst_text;
-	      symbol_value += text_offset;
 	      symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
 	      break;
 
@@ -165,20 +161,17 @@ som_symtab_read (bfd *abfd, struct objfile *objfile,
 		ms_type = mst_solib_trampoline;
 	      else
 		ms_type = mst_text;
-	      symbol_value += text_offset;
 	      symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
 	      break;
 
 	    case ST_STUB:
 	      symname = bfd_getb32 (bufp->name) + stringtab;
 	      ms_type = mst_solib_trampoline;
-	      symbol_value += text_offset;
 	      symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
 	      break;
 
 	    case ST_DATA:
 	      symname = bfd_getb32 (bufp->name) + stringtab;
-	      symbol_value += data_offset;
 	      ms_type = mst_data;
 	      break;
 	    default:
@@ -200,7 +193,6 @@ som_symtab_read (bfd *abfd, struct objfile *objfile,
 	    case ST_CODE:
 	      symname = bfd_getb32 (bufp->name) + stringtab;
 	      ms_type = mst_file_text;
-	      symbol_value += text_offset;
 	      symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
 
 	    check_strange_names:
@@ -231,7 +223,6 @@ som_symtab_read (bfd *abfd, struct objfile *objfile,
 	    case ST_MILLICODE:
 	      symname = bfd_getb32 (bufp->name) + stringtab;
 	      ms_type = mst_file_text;
-	      symbol_value += text_offset;
 	      symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
 	      break;
 
@@ -242,21 +233,18 @@ som_symtab_read (bfd *abfd, struct objfile *objfile,
 		 using mst_file_text vs mst_solib_trampoline here like
 		 we do for SS_UNIVERSAL and SS_EXTERNAL symbols above.  */
 	      ms_type = mst_file_text;
-	      symbol_value += text_offset;
 	      symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
 	      break;
 
 	    case ST_STUB:
 	      symname = bfd_getb32 (bufp->name) + stringtab;
 	      ms_type = mst_solib_trampoline;
-	      symbol_value += text_offset;
 	      symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
 	      break;
 
 
 	    case ST_DATA:
 	      symname = bfd_getb32 (bufp->name) + stringtab;
-	      symbol_value += data_offset;
 	      ms_type = mst_file_data;
 	      goto check_strange_names;
 
@@ -277,7 +265,6 @@ som_symtab_read (bfd *abfd, struct objfile *objfile,
 	    case ST_STORAGE:
 	    case ST_DATA:
 	      symname = bfd_getb32 (bufp->name) + stringtab;
-	      symbol_value += data_offset;
 	      ms_type = mst_data;
 	      break;
 
@@ -300,11 +287,16 @@ som_symtab_read (bfd *abfd, struct objfile *objfile,
 
 	  ALL_OBJFILE_OSECTIONS (objfile, iter)
 	    {
+	      CORE_ADDR start;
+	      CORE_ADDR len;
+
 	      if (bfd_is_const_section (iter->the_bfd_section))
 		continue;
 
-	      if (obj_section_addr (iter) <= symbol_value
-		  && symbol_value < obj_section_endaddr (iter))
+	      start = bfd_get_section_vma (iter->objfile->obfd,
+					   iter->the_bfd_section);
+	      len = bfd_get_section_size (iter->the_bfd_section);
+	      if (start <= symbol_value && symbol_value < start + len)
 		{
 		  section = iter->the_bfd_section;
 		  break;