93 lines
1.6 KiB
ArmAsm
93 lines
1.6 KiB
ArmAsm
#include <linux/linkage.h>
|
|
#include <linux/errno.h>
|
|
#include <asm/asm.h>
|
|
#include <asm/msr.h>
|
|
|
|
#ifdef CONFIG_X86_64
|
|
/*
|
|
* int {rdmsr,wrmsr}_safe_regs(u32 gprs[8]);
|
|
*
|
|
* reg layout: u32 gprs[eax, ecx, edx, ebx, esp, ebp, esi, edi]
|
|
*
|
|
*/
|
|
.macro op_safe_regs op
|
|
ENTRY(\op\()_safe_regs)
|
|
pushq %rbx
|
|
pushq %r12
|
|
movq %rdi, %r10 /* Save pointer */
|
|
xorl %r11d, %r11d /* Return value */
|
|
movl (%rdi), %eax
|
|
movl 4(%rdi), %ecx
|
|
movl 8(%rdi), %edx
|
|
movl 12(%rdi), %ebx
|
|
movl 20(%rdi), %r12d
|
|
movl 24(%rdi), %esi
|
|
movl 28(%rdi), %edi
|
|
1: \op
|
|
2: movl %eax, (%r10)
|
|
movl %r11d, %eax /* Return value */
|
|
movl %ecx, 4(%r10)
|
|
movl %edx, 8(%r10)
|
|
movl %ebx, 12(%r10)
|
|
movl %r12d, 20(%r10)
|
|
movl %esi, 24(%r10)
|
|
movl %edi, 28(%r10)
|
|
popq %r12
|
|
popq %rbx
|
|
ret
|
|
3:
|
|
movl $-EIO, %r11d
|
|
jmp 2b
|
|
|
|
_ASM_EXTABLE(1b, 3b)
|
|
ENDPROC(\op\()_safe_regs)
|
|
.endm
|
|
|
|
#else /* X86_32 */
|
|
|
|
.macro op_safe_regs op
|
|
ENTRY(\op\()_safe_regs)
|
|
pushl %ebx
|
|
pushl %ebp
|
|
pushl %esi
|
|
pushl %edi
|
|
pushl $0 /* Return value */
|
|
pushl %eax
|
|
movl 4(%eax), %ecx
|
|
movl 8(%eax), %edx
|
|
movl 12(%eax), %ebx
|
|
movl 20(%eax), %ebp
|
|
movl 24(%eax), %esi
|
|
movl 28(%eax), %edi
|
|
movl (%eax), %eax
|
|
1: \op
|
|
2: pushl %eax
|
|
movl 4(%esp), %eax
|
|
popl (%eax)
|
|
addl $4, %esp
|
|
movl %ecx, 4(%eax)
|
|
movl %edx, 8(%eax)
|
|
movl %ebx, 12(%eax)
|
|
movl %ebp, 20(%eax)
|
|
movl %esi, 24(%eax)
|
|
movl %edi, 28(%eax)
|
|
popl %eax
|
|
popl %edi
|
|
popl %esi
|
|
popl %ebp
|
|
popl %ebx
|
|
ret
|
|
3:
|
|
movl $-EIO, 4(%esp)
|
|
jmp 2b
|
|
|
|
_ASM_EXTABLE(1b, 3b)
|
|
ENDPROC(\op\()_safe_regs)
|
|
.endm
|
|
|
|
#endif
|
|
|
|
op_safe_regs rdmsr
|
|
op_safe_regs wrmsr
|
|
|