[Patch] Darwin: dump segment split info
Tristan Gingold
gingold@adacore.com
Fri Jan 20 10:40:00 GMT 2012
Hi,
I am committing this patch to display Mach-O segment split info data.
Tristan.
binutils/
2012-01-20 Tristan Gingold <gingold@adacore.com>
* od-macho.c (OPT_SEG_SPLIT_INFO): New macro.
(options): Add an entry for seg_split_info.
(mach_o_help): Document it.
(dump_segment_split_info): New function.
(dump_load_command): Handle seg_split_info.
Index: od-macho.c
===================================================================
RCS file: /cvs/src/src/binutils/od-macho.c,v
retrieving revision 1.4
diff -c -r1.4 od-macho.c
*** od-macho.c 4 Jan 2012 10:37:36 -0000 1.4
--- od-macho.c 20 Jan 2012 10:39:22 -0000
***************
*** 27,32 ****
--- 27,33 ----
#include "objdump.h"
#include "bucomm.h"
#include "bfdlink.h"
+ #include "libbfd.h"
#include "mach-o.h"
#include "mach-o/external.h"
#include "mach-o/codesign.h"
***************
*** 38,43 ****
--- 39,45 ----
#define OPT_LOAD 3
#define OPT_DYSYMTAB 4
#define OPT_CODESIGN 5
+ #define OPT_SEG_SPLIT_INFO 6
/* List of actions. */
static struct objdump_private_option options[] =
***************
*** 48,53 ****
--- 50,56 ----
{ "load", 0 },
{ "dysymtab", 0 },
{ "codesign", 0 },
+ { "seg_split_info", 0 },
{ NULL, 0 }
};
***************
*** 58,69 ****
{
fprintf (stream, _("\
For Mach-O files:\n\
! header Display the file header\n\
! section Display the segments and sections commands\n\
! map Display the section map\n\
! load Display the load commands\n\
! dysymtab Display the dynamic symbol table\n\
! codesign Display code signature section\n\
"));
}
--- 61,73 ----
{
fprintf (stream, _("\
For Mach-O files:\n\
! header Display the file header\n\
! section Display the segments and sections commands\n\
! map Display the section map\n\
! load Display the load commands\n\
! dysymtab Display the dynamic symbol table\n\
! codesign Display code signature\n\
! seg_split_info Display segment split info\n\
"));
}
***************
*** 852,857 ****
--- 856,908 ----
}
static void
+ dump_segment_split_info (bfd *abfd, bfd_mach_o_linkedit_command *cmd)
+ {
+ unsigned char *buf = xmalloc (cmd->datasize);
+ unsigned char *p;
+ unsigned int len;
+ bfd_vma addr = 0;
+
+ if (bfd_seek (abfd, cmd->dataoff, SEEK_SET) != 0
+ || bfd_bread (buf, cmd->datasize, abfd) != cmd->datasize)
+ {
+ non_fatal (_("cannot read segment split info"));
+ free (buf);
+ return;
+ }
+ if (buf[cmd->datasize - 1] != 0)
+ {
+ non_fatal (_("segment split info is not nul terminated"));
+ free (buf);
+ return;
+ }
+
+ switch (buf[0])
+ {
+ case 0:
+ printf (_(" 32 bit pointers:\n"));
+ break;
+ case 1:
+ printf (_(" 64 bit pointers:\n"));
+ break;
+ case 2:
+ printf (_(" PPC hi-16:\n"));
+ break;
+ default:
+ printf (_(" Unhandled location type %u\n"), buf[0]);
+ break;
+ }
+ for (p = buf + 1; *p != 0; p += len)
+ {
+ addr += read_unsigned_leb128 (abfd, p, &len);
+ fputs (" ", stdout);
+ bfd_printf_vma (abfd, addr);
+ putchar ('\n');
+ }
+ free (buf);
+ }
+
+ static void
dump_load_command (bfd *abfd, bfd_mach_o_load_command *cmd,
bfd_boolean verbose)
{
***************
*** 942,947 ****
--- 993,1000 ----
if (verbose && cmd->type == BFD_MACH_O_LC_CODE_SIGNATURE)
dump_code_signature (abfd, linkedit);
+ else if (verbose && cmd->type == BFD_MACH_O_LC_SEGMENT_SPLIT_INFO)
+ dump_segment_split_info (abfd, linkedit);
break;
}
case BFD_MACH_O_LC_SUB_FRAMEWORK:
***************
*** 1026,1031 ****
--- 1079,1086 ----
dump_load_commands (abfd, BFD_MACH_O_LC_DYSYMTAB, 0);
if (options[OPT_CODESIGN].selected)
dump_load_commands (abfd, BFD_MACH_O_LC_CODE_SIGNATURE, 0);
+ if (options[OPT_SEG_SPLIT_INFO].selected)
+ dump_load_commands (abfd, BFD_MACH_O_LC_SEGMENT_SPLIT_INFO, 0);
}
/* Vector for Mach-O. */
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