Mach-O: add objdump -P function_starts to display function starts.
bfd/ * mach-o.h (bfd_mach_o_get_base_address): New prototype. * mach-o.c (bfd_mach_o_write_symtab) (bfd_mach_o_write_contents) (bfd_mach_o_set_section_flags_from_bfd) (bfd_mach_o_build_seg_command): Fix indentation. (bfd_mach_o_get_base_address): New function. binutils/ * od-macho.c (OPT_FUNCTION_STARTS): New macro. (options): Add entry for function_starts. (mach_o_help): Ditto. (disp_segment_prot): New function. (dump_section_map): Call disp_segment_prot. (dump_function_starts): New function. (dump_obj_compact_unwind): Fix ouput indentation. (dump_exe_compact_unwind): Fix ouput indentation. (mach_o_dump): Handle function_starts.
This commit is contained in:
Tristan Gingold
parent
b5bee91426
commit
3cc27770cf
5 changed files with 142 additions and 20 deletions
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@ -1,3 +1,12 @@
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2014-03-27 Tristan Gingold <gingold@adacore.com>
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* mach-o.h (bfd_mach_o_get_base_address): New prototype.
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* mach-o.c (bfd_mach_o_write_symtab)
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(bfd_mach_o_write_contents)
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(bfd_mach_o_set_section_flags_from_bfd)
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(bfd_mach_o_build_seg_command): Fix indentation.
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(bfd_mach_o_get_base_address): New function.
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2014-03-26 Nick Clifton <nickc@redhat.com>
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* cofflink.c (_bfd_coff_generic_relocate_section): Skip
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38
bfd/mach-o.c
38
bfd/mach-o.c
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@ -2018,7 +2018,8 @@ bfd_mach_o_write_contents (bfd *abfd)
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case BFD_MACH_O_LC_SUB_FRAMEWORK:
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break;
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default:
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(*_bfd_error_handler) (_("unable to write unknown load command 0x%lx"),
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(*_bfd_error_handler)
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(_("unable to write unknown load command 0x%lx"),
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(unsigned long) cur->type);
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return FALSE;
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}
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@ -2042,7 +2043,8 @@ bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
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/* Create section Mach-O flags from BFD flags. */
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static void
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bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
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bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
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asection *sec)
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{
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flagword bfd_flags;
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bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
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@ -2173,7 +2175,8 @@ bfd_mach_o_build_seg_command (const char *segment,
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mdata->filelen += s->size;
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}
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/* Now pass through again, for zerofill, only now we just update the vmsize. */
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/* Now pass through again, for zerofill, only now we just update the
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vmsize. */
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for (i = 0; i < mdata->nsects; ++i)
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{
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bfd_mach_o_section *s = mdata->sections[i];
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@ -4274,6 +4277,35 @@ bfd_mach_o_gen_core_p (bfd *abfd)
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return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
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}
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/* Return the base address of ABFD, ie the address at which the image is
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mapped. The possible initial pagezero is ignored. */
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bfd_vma
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bfd_mach_o_get_base_address (bfd *abfd)
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{
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bfd_mach_o_data_struct *mdata;
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unsigned int i;
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/* Check for Mach-O. */
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if (!bfd_mach_o_valid (abfd))
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return 0;
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mdata = bfd_mach_o_get_data (abfd);
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for (i = 0; i < mdata->header.ncmds; i++)
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{
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bfd_mach_o_load_command *cmd = &mdata->commands[i];
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if ((cmd->type == BFD_MACH_O_LC_SEGMENT
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|| cmd->type == BFD_MACH_O_LC_SEGMENT_64))
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{
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struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
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if (segcmd->initprot != 0)
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return segcmd->vmaddr;
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}
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}
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return 0;
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}
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typedef struct mach_o_fat_archentry
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{
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unsigned long cputype;
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@ -656,6 +656,8 @@ unsigned int bfd_mach_o_section_get_entry_size (bfd *, bfd_mach_o_section *);
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bfd_boolean bfd_mach_o_read_symtab_symbols (bfd *);
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bfd_boolean bfd_mach_o_read_symtab_strtab (bfd *abfd);
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bfd_vma bfd_mach_o_get_base_address (bfd *);
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/* A placeholder in case we need to suppress emitting the dysymtab for some
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reason (e.g. compatibility with older system versions). */
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#define bfd_mach_o_should_emit_dysymtab(x) TRUE
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@ -1,3 +1,15 @@
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2014-03-27 Tristan Gingold <gingold@adacore.com>
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* od-macho.c (OPT_FUNCTION_STARTS): New macro.
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(options): Add entry for function_starts.
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(mach_o_help): Ditto.
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(disp_segment_prot): New function.
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(dump_section_map): Call disp_segment_prot.
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(dump_function_starts): New function.
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(dump_obj_compact_unwind): Fix ouput indentation.
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(dump_exe_compact_unwind): Fix ouput indentation.
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(mach_o_dump): Handle function_starts.
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2014-03-26 Tristan Gingold <gingold@adacore.com>
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* od-macho.c (bfd_mach_o_cpu_name): Add BFD_MACH_O_CPU_TYPE_ARM64.
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@ -42,6 +42,7 @@
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#define OPT_CODESIGN 5
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#define OPT_SEG_SPLIT_INFO 6
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#define OPT_COMPACT_UNWIND 7
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#define OPT_FUNCTION_STARTS 8
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/* List of actions. */
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static struct objdump_private_option options[] =
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@ -54,6 +55,7 @@ static struct objdump_private_option options[] =
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{ "codesign", 0 },
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{ "seg_split_info", 0 },
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{ "compact_unwind", 0 },
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{ "function_starts", 0 },
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{ NULL, 0 }
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};
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@ -72,6 +74,7 @@ For Mach-O files:\n\
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codesign Display code signature\n\
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seg_split_info Display segment split info\n\
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compact_unwind Display compact unwinding info\n\
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function_starts Display start address of functions\n\
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"));
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}
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@ -283,6 +286,14 @@ dump_header (bfd *abfd)
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printf (_(" reserved : %08x\n"), h->reserved);
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}
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static void
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disp_segment_prot (unsigned int prot)
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{
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putchar (prot & BFD_MACH_O_PROT_READ ? 'r' : '-');
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putchar (prot & BFD_MACH_O_PROT_WRITE ? 'w' : '-');
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putchar (prot & BFD_MACH_O_PROT_EXECUTE ? 'x' : '-');
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}
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static void
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dump_section_map (bfd *abfd)
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{
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@ -309,9 +320,7 @@ dump_section_map (bfd *abfd)
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putchar ('-');
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printf_vma (seg->vmaddr + seg->vmsize - 1);
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putchar (' ');
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putchar (seg->initprot & BFD_MACH_O_PROT_READ ? 'r' : '-');
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putchar (seg->initprot & BFD_MACH_O_PROT_WRITE ? 'w' : '-');
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putchar (seg->initprot & BFD_MACH_O_PROT_EXECUTE ? 'x' : '-');
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disp_segment_prot (seg->initprot);
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printf ("]\n");
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for (sec = seg->sect_head; sec != NULL; sec = sec->next)
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@ -394,7 +403,12 @@ dump_segment (bfd *abfd ATTRIBUTE_UNUSED, bfd_mach_o_load_command *cmd)
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printf_vma ((bfd_vma)(seg->fileoff + seg->filesize));
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printf ("\n");
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printf (" nsects: %lu", seg->nsects);
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printf (" flags: %lx\n", seg->flags);
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printf (" flags: %lx", seg->flags);
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printf (" initprot: ");
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disp_segment_prot (seg->initprot);
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printf (" maxprot: ");
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disp_segment_prot (seg->maxprot);
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printf ("\n");
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for (sec = seg->sect_head; sec != NULL; sec = sec->next)
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dump_section_header (abfd, sec);
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}
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@ -911,6 +925,55 @@ dump_segment_split_info (bfd *abfd, bfd_mach_o_linkedit_command *cmd)
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free (buf);
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}
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static void
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dump_function_starts (bfd *abfd, bfd_mach_o_linkedit_command *cmd)
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{
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unsigned char *buf = xmalloc (cmd->datasize);
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unsigned char *end_buf = buf + cmd->datasize;
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unsigned char *p;
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bfd_vma addr;
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if (bfd_seek (abfd, cmd->dataoff, SEEK_SET) != 0
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|| bfd_bread (buf, cmd->datasize, abfd) != cmd->datasize)
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{
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non_fatal (_("cannot read function starts"));
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free (buf);
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return;
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}
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/* Function starts are delta encoded, starting from the base address. */
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addr = bfd_mach_o_get_base_address (abfd);
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for (p = buf; ;)
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{
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bfd_vma delta = 0;
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unsigned int shift = 0;
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if (*p == 0 || p == end_buf)
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break;
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while (1)
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{
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unsigned char b = *p++;
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delta |= (b & 0x7f) << shift;
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if ((b & 0x80) == 0)
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break;
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if (p == end_buf)
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{
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fputs (" [truncated]\n", stdout);
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break;
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}
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shift += 7;
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}
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addr += delta;
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fputs (" ", stdout);
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bfd_printf_vma (abfd, addr);
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putchar ('\n');
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}
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free (buf);
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}
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static void
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dump_load_command (bfd *abfd, bfd_mach_o_load_command *cmd,
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bfd_boolean verbose)
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@ -1005,6 +1068,8 @@ dump_load_command (bfd *abfd, bfd_mach_o_load_command *cmd,
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dump_code_signature (abfd, linkedit);
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else if (verbose && cmd->type == BFD_MACH_O_LC_SEGMENT_SPLIT_INFO)
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dump_segment_split_info (abfd, linkedit);
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else if (verbose && cmd->type == BFD_MACH_O_LC_FUNCTION_STARTS)
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dump_function_starts (abfd, linkedit);
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break;
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}
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case BFD_MACH_O_LC_SUB_FRAMEWORK:
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@ -1260,7 +1325,7 @@ dump_obj_compact_unwind (bfd *abfd,
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int is_64 = mdata->header.version == 2;
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const unsigned char *p;
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printf (" compact unwind info:\n");
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printf ("Compact unwind info:\n");
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printf (" start length personality lsda\n");
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if (is_64)
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@ -1309,7 +1374,7 @@ dump_exe_compact_unwind (bfd *abfd,
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unsigned int i;
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/* The header. */
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printf (" compact unwind info:\n");
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printf ("Compact unwind info:\n");
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hdr = (struct mach_o_unwind_info_header *) content;
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if (size < sizeof (*hdr))
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@ -1544,6 +1609,8 @@ mach_o_dump (bfd *abfd)
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dump_load_commands (abfd, BFD_MACH_O_LC_CODE_SIGNATURE, 0);
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if (options[OPT_SEG_SPLIT_INFO].selected)
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dump_load_commands (abfd, BFD_MACH_O_LC_SEGMENT_SPLIT_INFO, 0);
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if (options[OPT_FUNCTION_STARTS].selected)
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dump_load_commands (abfd, BFD_MACH_O_LC_FUNCTION_STARTS, 0);
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if (options[OPT_COMPACT_UNWIND].selected)
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{
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dump_section_content (abfd, "__LD", "__compact_unwind",
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