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| author | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2015-05-04 20:09:51 +0300 |
|---|---|---|
| committer | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2015-05-14 09:28:33 +0300 |
| commit | e15beb584a5ebdfc363e1ff15f87102508652d71 (patch) | |
| tree | 290947175249b2470616c83e7d7c1c0ae297d329 | |
| parent | 5a7d55eed3316f40ca61acbee032bfc285e28803 (diff) | |
| download | libgcrypt-e15beb584a5ebdfc363e1ff15f87102508652d71.tar.gz | |
hwf-x86: add EDX as output register for xgetbv asm block
* src/hwf-x86.c (get_xgetbv): Add EDX as output.
--
XGETBV instruction modifies EAX:EDX register pair, so we need to mark
EDX as output to let compiler know that contents in this register are
lost.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
| -rw-r--r-- | src/hwf-x86.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/hwf-x86.c b/src/hwf-x86.c index 7ee246d8..baef2df0 100644 --- a/src/hwf-x86.c +++ b/src/hwf-x86.c @@ -100,11 +100,11 @@ get_cpuid(unsigned int in, unsigned int *eax, unsigned int *ebx, static unsigned int get_xgetbv(void) { - unsigned int t_eax; + unsigned int t_eax, t_edx; asm volatile ("xgetbv\n\t" - : "=a" (t_eax) + : "=a" (t_eax), "=d" (t_edx) : "c" (0) ); @@ -151,11 +151,11 @@ get_cpuid(unsigned int in, unsigned int *eax, unsigned int *ebx, static unsigned int get_xgetbv(void) { - unsigned int t_eax; + unsigned int t_eax, t_edx; asm volatile ("xgetbv\n\t" - : "=a" (t_eax) + : "=a" (t_eax), "=d" (t_edx) : "c" (0) ); |