diff options
Diffstat (limited to 'sysdeps/x86_64/dl-trampoline.S')
| -rw-r--r-- | sysdeps/x86_64/dl-trampoline.S | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/sysdeps/x86_64/dl-trampoline.S b/sysdeps/x86_64/dl-trampoline.S index 5564a11af2..1b97929aaa 100644 --- a/sysdeps/x86_64/dl-trampoline.S +++ b/sysdeps/x86_64/dl-trampoline.S @@ -1,5 +1,5 @@ /* PLT trampolines. x86-64 version. - Copyright (C) 2004, 2005, 2007, 2009 Free Software Foundation, Inc. + Copyright (C) 2004, 2005, 2007, 2009, 2011 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -139,10 +139,17 @@ L(have_avx): movl $1, %eax cpuid movq %r11,%rbx # Restore rbx - movl $1, %eax - testl $(1 << 28), %ecx - jne 2f - negl %eax + xorl %eax, %eax + // AVX and XSAVE supported? + testl $((1 << 28) | (1 << 27)), %ecx + je 2f + xorl %ecx, %ecx + // Get XFEATURE_ENABLED_MASK + xgetbv + andl $0x6, %eax + cmpl $0x6, %eax + // Nonzero if SSE and AVX state saving is enabled. + sete %al 2: movl %eax, L(have_avx)(%rip) cmpl $0, %eax |