Commit-ID: 68874ac3304ade7ed5ebb12af00d6b9bbbca0a16 Gitweb: http://git.kernel.org/tip/68874ac3304ade7ed5ebb12af00d6b9bbbca0a16 Author: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> AuthorDate: Thu, 21 Jan 2016 16:49:18 -0600 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Wed, 24 Feb 2016 08:35:42 +0100 x86/asm/crypto: Don't use RBP as a scratch register The frame pointer (RBP) is getting clobbered in sha1_mb_mgr_submit_avx2() before a function call, which can mess up stack traces. Use R12 instead. Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Cc: Bernd Petrovitsch <bernd@xxxxxxxxxxxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Brian Gerst <brgerst@xxxxxxxxx> Cc: Chris J Arges <chris.j.arges@xxxxxxxxxxxxx> Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Jiri Slaby <jslaby@xxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Michal Marek <mmarek@xxxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxx> Cc: Pedro Alves <palves@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: live-patching@xxxxxxxxxxxxxxx Link: http://lkml.kernel.org/r/15a3eb7ebe68e37755927915f45e4f0bde4d18c5.1453405861.git.jpoimboe@xxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/crypto/sha-mb/sha1_mb_mgr_submit_avx2.S | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/crypto/sha-mb/sha1_mb_mgr_submit_avx2.S b/arch/x86/crypto/sha-mb/sha1_mb_mgr_submit_avx2.S index a5a14c6..c3b9447 100644 --- a/arch/x86/crypto/sha-mb/sha1_mb_mgr_submit_avx2.S +++ b/arch/x86/crypto/sha-mb/sha1_mb_mgr_submit_avx2.S @@ -86,8 +86,8 @@ job_rax = %rax len = %rax DWORD_len = %eax -lane = %rbp -tmp3 = %rbp +lane = %r12 +tmp3 = %r12 tmp = %r9 DWORD_tmp = %r9d @@ -99,7 +99,7 @@ lane_data = %r10 # arg 2 : rdx : job ENTRY(sha1_mb_mgr_submit_avx2) push %rbx - push %rbp + push %r12 mov _unused_lanes(state), unused_lanes mov unused_lanes, lane @@ -190,7 +190,7 @@ len_is_0: movl DWORD_tmp, _result_digest+1*16(job_rax) return: - pop %rbp + pop %r12 pop %rbx ret -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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