src/patches/cpufrequtils/0006-aperf-fix-compilation-on-x86-32-with-fPIC.patch

   1 From 9085ce6f615d9d2e0182d3ce029b882835bd0a6b Mon Sep 17 00:00:00 2001
   2 From: Matt Turner <mattst88@gmail.com>
   3 Date: Tue, 26 Jul 2011 19:28:31 -0400
   4 Subject: [PATCH 6/8] aperf: fix compilation on x86-32 with -fPIC
   5
   6 ebx is used to store the GOT pointer when compiled with -fPIC, so it's
   7 not usable by inline assembly.
   8
   9 https://bugs.gentoo.org/375967
  10
  11 Signed-off-by: Matt Turner <mattst88@gmail.com>
  12 Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
  13 ---
  14  utils/cpuid.h |   14 +++++++++++++-
  15  1 file changed, 13 insertions(+), 1 deletion(-)
  16
  17 diff --git a/utils/cpuid.h b/utils/cpuid.h
  18 index 2bac69a..53da789 100644
  19 --- a/utils/cpuid.h
  20 +++ b/utils/cpuid.h
  21 @@ -5,9 +5,21 @@ static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
  22                                 unsigned int *ecx, unsigned int *edx)
  23  {
  24         /* ecx is often an input as well as an output. */
  25 -       asm volatile("cpuid"
  26 +       asm volatile(
  27 +#if defined(__i386__) && defined(__PIC__)
  28 +           "push %%ebx\n"
  29 +           "cpuid\n"
  30 +           "movl %%ebx, %1\n"
  31 +           "pop %%ebx\n"
  32 +#else
  33 +           "cpuid\n"
  34 +#endif
  35             : "=a" (*eax),
  36 +#if defined(__i386__) && defined(__PIC__)
  37 +             "=r" (*ebx),
  38 +#else
  39               "=b" (*ebx),
  40 +#endif
  41               "=c" (*ecx),
  42               "=d" (*edx)
  43             : "0" (*eax), "2" (*ecx));
  44 --
  45 1.7.10
  46