diff options
| author | Mike Frysinger | 2009-05-10 22:37:18 +0200 |
|---|---|---|
| committer | Karel Zak | 2009-05-11 10:52:02 +0200 |
| commit | c9239f23acdc8b50f8bcbfadf967c6a490fd4693 (patch) | |
| tree | 918cd73cf6e1c5acf29f9ce8741644f394fcf3bb /sys-utils/lscpu.c | |
| parent | chrt: don't assume SCHED_BATCH and SCHED_IDLE exist (diff) | |
| download | kernel-qcow2-util-linux-c9239f23acdc8b50f8bcbfadf967c6a490fd4693.tar.gz kernel-qcow2-util-linux-c9239f23acdc8b50f8bcbfadf967c6a490fd4693.tar.xz kernel-qcow2-util-linux-c9239f23acdc8b50f8bcbfadf967c6a490fd4693.zip | |
lscpu: fix cpuid code on x86/PIC
If we build lscpu as PIE, we currently get a build failure:
lscpu.c: In function 'main':
lscpu.c:333: error: can't find a register in class 'BREG' while reloading 'asm'
lscpu.c:333: error: 'asm' operand has impossible constraints
make[2]: *** [lscpu.o] Error 1
So we need a little bit of register shuffling to keep gcc happy.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'sys-utils/lscpu.c')
| -rw-r--r-- | sys-utils/lscpu.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/sys-utils/lscpu.c b/sys-utils/lscpu.c index 3e3fbbeb6..6b6082fbf 100644 --- a/sys-utils/lscpu.c +++ b/sys-utils/lscpu.c @@ -330,9 +330,19 @@ static inline void cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx) { - __asm__("cpuid" - : "=a" (*eax), - "=b" (*ebx), + __asm__( +#if defined(__PIC__) && defined(__i386__) + /* x86 PIC cannot clobber ebx -- gcc bitches */ + "pushl %%ebx;" + "cpuid;" + "movl %%ebx, %%esi;" + "popl %%ebx;" + : "=S" (*ebx), +#else + "cpuid;" + : "=b" (*ebx), +#endif + "=a" (*eax), "=c" (*ecx), "=d" (*edx) : "0" (op), "c"(0)); |