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Diffstat (limited to 'com32/include/sys/cpu.h')
-rw-r--r--com32/include/sys/cpu.h21
1 files changed, 15 insertions, 6 deletions
diff --git a/com32/include/sys/cpu.h b/com32/include/sys/cpu.h
index dfba02e7..d96ec665 100644
--- a/com32/include/sys/cpu.h
+++ b/com32/include/sys/cpu.h
@@ -23,21 +23,26 @@ static inline void cpuid_count(uint32_t op, uint32_t cnt,
uint32_t * eax, uint32_t * ebx,
uint32_t * ecx, uint32_t * edx)
{
-asm("cpuid":"=a"(*eax), "=b"(*ebx), "=c"(*ecx), "=d"(*edx)
+asm("pushl %%ebx ; cpuid ; movl %%ebx,%0 ; popl %%ebx":"=a"(*eax), "=SD"(*ebx), "=c"(*ecx),
+ "=d"(*edx)
: "a"(op), "c"(cnt));
}
static inline void cpuid(uint32_t op, uint32_t * eax, uint32_t * ebx,
uint32_t * ecx, uint32_t * edx)
{
- cpuid_count(op, 0, eax, ebx, ecx, edx);
+asm("pushl %%ebx ; cpuid ; movl %%ebx,%0 ; popl %%ebx":"=a"(*eax), "=SD"(*ebx), "=c"(*ecx),
+ "=d"(*edx)
+: "a"(op));
}
static inline __constfunc uint32_t cpuid_eax(uint32_t level)
{
uint32_t v;
-asm("cpuid": "=a"(v): "a"(level):"ebx", "ecx", "edx");
+asm("pushl %%ebx ; cpuid ; popl %%ebx":"=a"(v)
+: "a"(level)
+: "ecx", "edx");
return v;
}
@@ -45,7 +50,9 @@ static inline __constfunc uint32_t cpuid_ebx(uint32_t level)
{
uint32_t v;
-asm("cpuid": "=b"(v), "+a"(level): :"ecx", "edx");
+asm("pushl %%ebx ; cpuid ; movl %%ebx,%0 ; popl %%ebx":"=a"(v)
+: "a"(level)
+: "ecx", "edx");
return v;
}
@@ -53,7 +60,8 @@ static inline __constfunc uint32_t cpuid_ecx(uint32_t level)
{
uint32_t v;
-asm("cpuid": "=c"(v), "+a"(level): :"ebx", "edx");
+asm("pushl %%ebx ; cpuid ; popl %%ebx":"=c"(v), "+a"(level)
+: : "edx");
return v;
}
@@ -61,7 +69,8 @@ static inline __constfunc uint32_t cpuid_edx(uint32_t level)
{
uint32_t v;
-asm("cpuid": "=d"(v), "+a"(level): :"ebx", "ecx");
+asm("pushl %%ebx ; cpuid ; popl %%ebx":"=d"(v), "+a"(level)
+: : "ecx");
return v;
}