e_padlock.c: make it compile on MacOS X.

diff --git a/engines/e_padlock.c b/engines/e_padlock.c
index ce7e086553c87f453457b6c45f18adb15367d448..7c64cf38c53c7d056a1d1f0a0702fac6d89c0344 100644 (file)
--- a/engines/e_padlock.c
+++ b/engines/e_padlock.c
@@ -458,25 +458,27 @@ padlock_available(void)
        eax = 0x00000000;
        vendor_string[12] = 0;
        asm volatile (
+               "pushq  %%rbx\n"
                "cpuid\n"
                "movl   %%ebx,(%1)\n"
                "movl   %%edx,4(%1)\n"
                "movl   %%ecx,8(%1)\n"
-               : "+a"(eax) : "r"(vendor_string) : "rbx", "rcx", "rdx");
+               "popq   %%rbx"
+               : "+a"(eax) : "r"(vendor_string) : "rcx", "rdx");
        if (strcmp(vendor_string, "CentaurHauls") != 0)
                return 0;
 
        /* Check for Centaur Extended Feature Flags presence */
        eax = 0xC0000000;
-       asm volatile ("cpuid"
-               : "+a"(eax) : : "rbx", "rcx", "rdx");
+       asm volatile ("pushq %%rbx; cpuid; popq %%rbx"
+               : "+a"(eax) : : "rcx", "rdx");
        if (eax < 0xC0000001)
                return 0;
 
        /* Read the Centaur Extended Feature Flags */
        eax = 0xC0000001;
-       asm volatile ("cpuid"
-               : "+a"(eax), "=d"(edx) : : "rbx", "rcx");
+       asm volatile ("pushq %%rbx; cpuid; popq %%rbx"
+               : "+a"(eax), "=d"(edx) : : "rcx");
 
        /* Fill up some flags */
        padlock_use_ace = ((edx & (0x3<<6)) == (0x3<<6));
@@ -532,12 +534,14 @@ static inline void *name(size_t cnt,              \
        struct padlock_cipher_data *cdata,      \
        void *out, const void *inp)             \
 {      void *iv;                               \
-       asm volatile ( "leaq    16(%0),%%rdx\n" \
+       asm volatile ( "pushq   %%rbx\n"        \
+               "       leaq    16(%0),%%rdx\n" \
                "       leaq    32(%0),%%rbx\n" \
                        rep_xcrypt "\n"         \
+               "       popq    %%rbx"          \
                : "=a"(iv), "=c"(cnt), "=D"(out), "=S"(inp) \
                : "0"(cdata), "1"(cnt), "2"(out), "3"(inp)  \
-               : "rbx", "rdx", "cc", "memory");        \
+               : "rdx", "cc", "memory");       \
        return iv;                              \
 }
 #endif