99 lines
1.8 KiB
ArmAsm
99 lines
1.8 KiB
ArmAsm
|
#include <linux/linkage.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <asm/asm.h>
|
||
|
|
#include <asm/msr.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_X86_64
|
||
|
|
/*
|
||
|
|
* int native_{rdmsr,wrmsr}_safe_regs(u32 gprs[8]);
|
||
|
|
*
|
||
|
|
* reg layout: u32 gprs[eax, ecx, edx, ebx, esp, ebp, esi, edi]
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
.macro op_safe_regs op:req
|
||
|
|
ENTRY(native_\op\()_safe_regs)
|
||
|
|
push %rbx
|
||
|
|
push %rbp
|
||
|
|
push $0 /* Return value */
|
||
|
|
push %rdi
|
||
|
|
movl (%rdi), %eax
|
||
|
|
movl 4(%rdi), %ecx
|
||
|
|
movl 8(%rdi), %edx
|
||
|
|
movl 12(%rdi), %ebx
|
||
|
|
movl 20(%rdi), %ebp
|
||
|
|
movl 24(%rdi), %esi
|
||
|
|
movl 28(%rdi), %edi
|
||
|
|
1: \op
|
||
|
|
2: movl %edi, %r10d
|
||
|
|
pop %rdi
|
||
|
|
movl %eax, (%rdi)
|
||
|
|
movl %ecx, 4(%rdi)
|
||
|
|
movl %edx, 8(%rdi)
|
||
|
|
movl %ebx, 12(%rdi)
|
||
|
|
movl %ebp, 20(%rdi)
|
||
|
|
movl %esi, 24(%rdi)
|
||
|
|
movl %r10d, 28(%rdi)
|
||
|
|
pop %rax
|
||
|
|
pop %rbp
|
||
|
|
pop %rbx
|
||
|
|
ret
|
||
|
|
3:
|
||
|
|
movq $-EIO, 8(%rsp)
|
||
|
|
jmp 2b
|
||
|
|
.section __ex_table,"ax"
|
||
|
|
.balign 4
|
||
|
|
.quad 1b, 3b
|
||
|
|
.previous
|
||
|
|
ENDPROC(native_\op\()_safe_regs)
|
||
|
|
.endm
|
||
|
|
|
||
|
|
#else /* X86_32 */
|
||
|
|
|
||
|
|
.macro op_safe_regs op:req
|
||
|
|
ENTRY(native_\op\()_safe_regs)
|
||
|
|
push %ebx
|
||
|
|
push %ebp
|
||
|
|
push %esi
|
||
|
|
push %edi
|
||
|
|
push $0 /* Return value */
|
||
|
|
push %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: push %eax
|
||
|
|
movl 4(%esp), %eax
|
||
|
|
pop (%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)
|
||
|
|
pop %eax
|
||
|
|
pop %edi
|
||
|
|
pop %esi
|
||
|
|
pop %ebp
|
||
|
|
pop %ebx
|
||
|
|
ret
|
||
|
|
3:
|
||
|
|
movl $-EIO, 4(%esp)
|
||
|
|
jmp 2b
|
||
|
|
.section __ex_table,"ax"
|
||
|
|
.balign 4
|
||
|
|
.long 1b, 3b
|
||
|
|
.previous
|
||
|
|
ENDPROC(native_\op\()_safe_regs)
|
||
|
|
.endm
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
op_safe_regs rdmsr
|
||
|
|
op_safe_regs wrmsr
|
||
|
|
|