Messages in this thread | | | Subject | [RFC PATCH -tip 00/16] in-kernel x86 disassember | From | Masami Hiramatsu <> | Date | Mon, 02 Apr 2012 01:02:29 +0900 |
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Hi,
Here is a series of patches of the in-kernel x86 disassembler for the latest tip tree. This will show you a pretty disassembled code instead of just a digital code sequence when you gets a kernel panic etc. (I know, we also have script/decodecode for the panic use)
This feature is not for users, but mainly for kernel developers who can understand disassembly code of x86 ;). This is just like a joke feature in kernel. (yeah, I spend my spare time for this. It's my fun :))
Currently, this can disassemble only most popular instructions in-kernel, such as non-SSE, non-MMX, non-AVX, and so on, becuase these extended instructions are rarely used in kernel :) This series supports AT&T syntax, but not fully same as objdump. Still it doesn't decode instruction suffix of operand size (w,d,q etc).
The series is also hosted on a repository on GitHub, you can get the latest version from below public repository.
git://github.com/mhiramat/linux.git
This series adds below features:
- Debugfs disassembler interface for kernel function. You can disassemble running kernel function on-line. - Panic dump shows disassembly code instead of instruction byte stream. It generates more human-readable report. (I strongly recommend you to add a serial logger if it is enabled :)) - Disassemble command for KDB. 'dis' command is now available. - User-land disassembly tool.
Thank you,
---
Masami Hiramatsu (16): x86: Split default64 flag from force64 flag x86: Change the order of segment prefix macro x86: Add bogus disassembler support x86: Show kernel symbol in disassembler x86: Disassemble x86-64 only instructions x86: Change asm syntax to AT&T-like one kdb: Provide original instruction modified by sw breakpoint x86/kprobes: Recover breakpoint instruction if KGDB knows x86: kernel function disassembly interface x86/disasm: Indicate modified instructions tracing/docs: add explanation about disassembler interface x86: Merge code dump in show_registers x86: Disassemble support in register dump x86: Indicate trapped address and probed address x86/kdb: Add x86 disassembe command tools/bogodis: Add bogus disassembler tool in userspace
Documentation/trace/kprobetrace.txt | 14 + arch/x86/Kconfig.debug | 16 + arch/x86/include/asm/disasm.h | 14 + arch/x86/include/asm/inat.h | 38 ++ arch/x86/include/asm/insn.h | 16 + arch/x86/include/asm/kdebug.h | 1 arch/x86/include/asm/kprobes.h | 2 arch/x86/kernel/dumpstack.c | 146 +++++++++ arch/x86/kernel/dumpstack_32.c | 26 -- arch/x86/kernel/dumpstack_64.c | 25 - arch/x86/kernel/kdebugfs.c | 159 +++++++++ arch/x86/kernel/kgdb.c | 72 ++++ arch/x86/kernel/kprobes.c | 9 + arch/x86/lib/Makefile | 18 + arch/x86/lib/disasm.c | 508 ++++++++++++++++++++++++++++++ arch/x86/lib/insn.c | 2 arch/x86/lib/mnemonic.c | 96 ++++++ arch/x86/tools/gen-insn-attr-x86.awk | 7 arch/x86/tools/gen-insn-mnemonic-x86.awk | 352 +++++++++++++++++++++ include/linux/kdb.h | 3 include/linux/kgdb.h | 1 kernel/debug/debug_core.c | 14 + kernel/debug/kdb/kdb_main.c | 35 ++ tools/bogodis/Makefile | 51 +++ tools/bogodis/bogodis.c | 202 ++++++++++++ 25 files changed, 1759 insertions(+), 68 deletions(-) create mode 100644 arch/x86/include/asm/disasm.h create mode 100644 arch/x86/lib/disasm.c create mode 100644 arch/x86/lib/mnemonic.c create mode 100644 arch/x86/tools/gen-insn-mnemonic-x86.awk create mode 100644 tools/bogodis/Makefile create mode 100644 tools/bogodis/bogodis.c
-- Masami Hiramatsu <masami.hiramatsu@gmail.com>
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