Re: Inserting new segment and section in mach-o file
site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com On Aug 2, 2006, at 4:29 AM, Jonathan Guy wrote: As far as I'm aware, the -sectcreate option works as documented: = Mike _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... If I have an existing relocatable mach object file is there a way of inserting a new segment and section therein. I've looked at relinking but don't seem to be getting anywhere. Any help would be great thanks [Cooper:/tmp] msmith% ld -r -o /tmp/test -sectcreate test test / mach_kernel ld: warning no object files specified, only command line created symbols and/or sections created from files will appear in the output file [Cooper:/tmp] msmith% ls -l /tmp/test -rwxr-xr-x 1 msmith wheel 8380020 Aug 3 01:37 /tmp/test [Cooper:/tmp] msmith% otool -l /tmp/test /tmp/test: Load command 0 cmd LC_SEGMENT cmdsize 124 segname vmaddr 0x00000000 vmsize 0x007fddc0 fileoff 176 filesize 8379840 maxprot 0x00000007 initprot 0x00000003 nsects 1 flags 0x4 Section sectname test segname test addr 0x00000000 size 0x007fddc0 offset 176 align 2^4 (16) reloff 0 nreloc 0 flags 0x00000000 reserved1 0 reserved2 0 Load command 1 cmd LC_SYMTAB cmdsize 24 symoff 8380016 nsyms 0 stroff 8380016 strsize 4 [Cooper:/tmp] msmith% touch test.c [Cooper:/tmp] msmith% cc -c -o test.o test.c [Cooper:/tmp] msmith% ld -r -o test.2 test test.o [Cooper:/tmp] msmith% ls -l test* -rwxr-xr-x 1 msmith wheel 8380020 Aug 3 01:37 test -rwxr-xr-x 1 msmith wheel 8380168 Aug 3 01:39 test.2 -rw-r--r-- 1 msmith wheel 0 Aug 3 01:39 test.c -rw-r--r-- 1 msmith wheel 152 Aug 3 01:39 test.o [Cooper:/tmp] msmith% otool -l test.2 test.2: Load command 0 cmd LC_SEGMENT cmdsize 192 segname vmaddr 0x00000000 vmsize 0x007fddc0 fileoff 324 filesize 8379840 maxprot 0x00000003 initprot 0x00000003 nsects 2 flags 0x4 Section sectname test segname test addr 0x00000000 size 0x007fddc0 offset 324 align 2^4 (16) reloff 0 nreloc 0 flags 0x00000000 reserved1 0 reserved2 0 Section sectname __text segname __TEXT addr 0x007fddc0 size 0x00000000 offset 8380164 align 2^0 (1) reloff 0 nreloc 0 flags 0x80000000 reserved1 0 reserved2 0 Load command 1 cmd LC_SYMTAB cmdsize 24 symoff 8380164 nsyms 0 stroff 8380164 strsize 4 Load command 2 cmd LC_UNIXTHREAD cmdsize 80 flavor i386_THREAD_STATE count i386_THREAD_STATE_COUNT eax 0x00000000 ebx 0x00000000 ecx 0x00000000 edx 0x00000000 edi 0x00000000 esi 0x00000000 ebp 0x00000000 esp 0x00000000 ss 0x0000001f eflags 0x00000000 eip 0x00000000 cs 0x00000017 ds 0x0000001f es 0x0000001f fs 0x00000000 gs 0x00000000 This email sent to site_archiver@lists.apple.com
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Michael Smith