Josh Poimboeuf 39358a033b objtool, x86: Add facility for asm code to provide unwind hints ...

Some asm (and inline asm) code does special things to the stack which
objtool can't understand.  (Nor can GCC or GNU assembler, for that
matter.)  In such cases we need a facility for the code to provide
annotations, so the unwinder can unwind through it.

This provides such a facility, in the form of unwind hints.  They're
similar to the GNU assembler .cfi* directives, but they give more
information, and are needed in far fewer places, because objtool can
fill in the blanks by following branches and adjusting the stack pointer
for pushes and pops.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: live-patching@vger.kernel.org
Link: http://lkml.kernel.org/r/0f5f3c9104fca559ff4088bece1d14ae3bca52d5.1499786555.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2017-07-18 10:57:44 +02:00

..

arch/x86

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-07-03 12:40:46 -07:00

Documentation

objtool: Add ORC unwind table generation

2017-07-18 10:57:43 +02:00

.gitignore

objtool: Add 'fixdep' to objtool/.gitignore

2016-07-27 11:07:11 +02:00

arch.h

objtool: Implement stack validation 2.0

2017-06-30 10:19:19 +02:00

Build

objtool: Add ORC unwind table generation

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builtin-check.c

objtool: Add ORC unwind table generation

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builtin-orc.c

objtool: Add ORC unwind table generation

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builtin.h

objtool: Add ORC unwind table generation

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cfi.h

objtool: Implement stack validation 2.0

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check.c

objtool, x86: Add facility for asm code to provide unwind hints

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check.h

objtool, x86: Add facility for asm code to provide unwind hints

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elf.c

objtool: Add ORC unwind table generation

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elf.h

objtool: Add ORC unwind table generation

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Makefile

objtool, x86: Add facility for asm code to provide unwind hints

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objtool.c

objtool: Add ORC unwind table generation

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orc_dump.c

objtool: Add ORC unwind table generation

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orc_gen.c

objtool: Add ORC unwind table generation

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orc_types.h

objtool, x86: Add facility for asm code to provide unwind hints

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orc.h

objtool: Add ORC unwind table generation

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special.c

objtool: Implement stack validation 2.0

2017-06-30 10:19:19 +02:00

special.h

objtool: Add tool to perform compile-time stack metadata validation

2016-02-29 08:35:12 +01:00

warn.h

objtool: Implement stack validation 2.0

2017-06-30 10:19:19 +02:00