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inline assembly: improve everywhere

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Ciro Santilli 六四事件 法轮功
2019-02-25 00:00:00 +00:00
parent 7ec28d6808
commit a30ed0f047
5 changed files with 62 additions and 38 deletions
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52
include/ring0.h
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@@ -27,30 +27,46 @@ void ring0_get_control_regs(Ring0Regs *ring0_regs)
#if defined(__x86_64__)
__asm__ __volatile__ (
"mov %%cr0, %%rax;"
"mov %%eax, %0;"
"mov %%cr2, %%rax;"
"mov %%eax, %1;"
"mov %%cr3, %%rax;"
"mov %%eax, %2;"
: "=m" (ring0_regs->cr0),
"=m" (ring0_regs->cr2),
"=m" (ring0_regs->cr3)
"mov %%eax, %[cr0];"
: [cr0] "=m" (ring0_regs->cr0)
:
: "%rax"
: "rax"
);
__asm__ __volatile__ (
"mov %%cr2, %%rax;"
"mov %%eax, %[cr2];"
: [cr2] "=m" (ring0_regs->cr2)
:
: "rax"
);
__asm__ __volatile__ (
"mov %%cr3, %%rax;"
"mov %%eax, %[cr3];"
: [cr3] "=m" (ring0_regs->cr3)
:
: "rax"
);
#elif defined(__i386__)
__asm__ __volatile__ (
"mov %%cr0, %%eax;"
"mov %%eax, %0;"
"mov %%cr2, %%eax;"
"mov %%eax, %1;"
"mov %%cr3, %%eax;"
"mov %%eax, %2;"
: "=m" (ring0_regs->cr0),
"=m" (ring0_regs->cr2),
"=m" (ring0_regs->cr3)
"mov %%eax, %[cr0];"
: [cr0] "=m" (ring0_regs->cr0)
:
: "%eax"
: "eax"
);
__asm__ __volatile__ (
"mov %%cr2, %%eax;"
"mov %%eax, %[cr2];"
: [cr2] "=m" (ring0_regs->cr2)
:
: "eax"
);
__asm__ __volatile__ (
"mov %%cr3, %%eax;"
"mov %%eax, %[cr3];"
: [cr3] "=m" (ring0_regs->cr3)
:
: "eax"
);
#endif
}