This is the mail archive of the gdb@sourceware.org mailing list for the GDB project.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
Other format: | [Raw text] |
On Mon, 08 Apr 2013 16:34:37 +0200, ishare wrote: > I record at 0x40000000 , then I nexti 10 instructions , then I want reverse execute > these 10 instructions one by one, So I type reverse-nexti ,but unexpectly ,gdb directly > goes back to the addresss 0x40000000 ,where I start record . > > What I need is 10->9->8->7->6->5->4->3->2->1 ,not execute again from begin to end . It is safer during troubleshooting to use *stepi instead of *nexti (where there is no difference as there is no call instruction). It works for me with 7.5.1 so it would be needed to have a reproducer. Additionally there ware some 7.6 (pre-release available now) fixes to these issues but it should not affect this case as long as there are no calls. Regards, Jan GNU gdb (GDB) 7.5.1.20130125-cvs Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /home/jkratoch/t/nops...done. (gdb) disas _start Dump of assembler code for function _start: 0x00000000004000d4 <+0>: nop 0x00000000004000d5 <+1>: nop 0x00000000004000d6 <+2>: nop 0x00000000004000d7 <+3>: nop 0x00000000004000d8 <+4>: nop 0x00000000004000d9 <+5>: nop 0x00000000004000da <+6>: nop 0x00000000004000db <+7>: nop 0x00000000004000dc <+8>: nop 0x00000000004000dd <+9>: nop 0x00000000004000de <+10>: int3 End of assembler dump. (gdb) info files Symbols from "/home/jkratoch/t/nops". Local exec file: `/home/jkratoch/t/nops', file type elf64-x86-64. Entry point: 0x4000d4 0x00000000004000b0 - 0x00000000004000d4 is .note.gnu.build-id 0x00000000004000d4 - 0x00000000004000df is .text (gdb) b *0x4000d4 Breakpoint 1 at 0x4000d4: file nops.S, line 2. (gdb) r Starting program: /home/jkratoch/t/nops warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff7ffd000 Breakpoint 1, _start () at nops.S:2 2 nop (gdb) record (gdb) nexti 3 nop (gdb) 4 nop (gdb) 5 nop (gdb) 6 nop (gdb) 7 nop (gdb) 8 nop (gdb) 9 nop (gdb) 10 nop (gdb) 11 nop (gdb) 12 int3 (gdb) reverse-nexti 11 nop (gdb) 10 nop (gdb) 9 nop (gdb) 8 nop (gdb) 7 nop (gdb) 6 nop (gdb) 5 nop (gdb) 4 nop (gdb) 3 nop (gdb) No more reverse-execution history. _start () at nops.S:2 2 nop (gdb)
Attachment:
nops.S
Description: Text document
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |