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Fix LZMA compilation on GCC with position-independent code (PIC) generation enabled 

EBX register is used Global Offset Table in PIC
http://www.greyhat.ch/lab/downloads/pic.html
This commit is contained in:
alexey.lysiuk 2014-06-25 20:11:05 +03:00
parent bdddea541f
commit 0be30c782c
1 changed files with 16 additions and 0 deletions
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16
lzma/C/CpuArch.c
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@ -70,8 +70,24 @@ static void MyCPUID(UInt32 function, UInt32 *a, UInt32 *b, UInt32 *c, UInt32 *d)
*c = c2; *c = c2;
*d = d2; *d = d2;
#elif __PIC__
/* GCC or Clang WITH position-independent code generation */
__asm__ __volatile__ (
"xchgl %%ebx, %1\n"
"cpuid\n"
"xchgl %%ebx, %1\n"
: "=a" (*a) ,
"=r" (*b) ,
"=c" (*c) ,
"=d" (*d)
: "0" (function)) ;
#else #else
/* GCC or Clang WITHOUT position-independent code generation */
__asm__ __volatile__ ( __asm__ __volatile__ (
"cpuid" "cpuid"
: "=a" (*a) , : "=a" (*a) ,