mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-13 20:12:26 +00:00
ca231b82f6
Rationale: we already had a non buildroot build system, maintaining both will be hard, and having short paths is more awesome.
59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
#if defined(__x86_64__) || defined(__i386__)
|
|
|
|
#ifdef THIS_MODULE
|
|
#include <linux/kernel.h>
|
|
#if defined(__x86_64__)
|
|
typedef u64 T;
|
|
#elif defined(__i386__)
|
|
typedef u32 T;
|
|
#endif
|
|
#else
|
|
#include <stdint.h>
|
|
#if defined(__x86_64__)
|
|
typedef uint64_t T;
|
|
#elif defined(__i386__)
|
|
typedef uint32_t T;
|
|
#endif
|
|
#endif
|
|
|
|
typedef struct {
|
|
T cr0;
|
|
T cr2;
|
|
T cr3;
|
|
} Ring0Regs;
|
|
|
|
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)
|
|
:
|
|
: "%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)
|
|
:
|
|
: "%eax"
|
|
);
|
|
#endif
|
|
}
|
|
|
|
#endif
|