97 lines
1.8 KiB
ArmAsm
97 lines
1.8 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
#include <linux/linkage.h>
|
|
#include <asm/stackframe.h>
|
|
|
|
.text
|
|
|
|
.macro save_all_base_regs
|
|
cfi_st ra, PT_R1
|
|
cfi_st tp, PT_R2
|
|
cfi_st a0, PT_R4
|
|
cfi_st a1, PT_R5
|
|
cfi_st a2, PT_R6
|
|
cfi_st a3, PT_R7
|
|
cfi_st a4, PT_R8
|
|
cfi_st a5, PT_R9
|
|
cfi_st a6, PT_R10
|
|
cfi_st a7, PT_R11
|
|
cfi_st t0, PT_R12
|
|
cfi_st t1, PT_R13
|
|
cfi_st t2, PT_R14
|
|
cfi_st t3, PT_R15
|
|
cfi_st t4, PT_R16
|
|
cfi_st t5, PT_R17
|
|
cfi_st t6, PT_R18
|
|
cfi_st t7, PT_R19
|
|
cfi_st t8, PT_R20
|
|
cfi_st u0, PT_R21
|
|
cfi_st fp, PT_R22
|
|
cfi_st s0, PT_R23
|
|
cfi_st s1, PT_R24
|
|
cfi_st s2, PT_R25
|
|
cfi_st s3, PT_R26
|
|
cfi_st s4, PT_R27
|
|
cfi_st s5, PT_R28
|
|
cfi_st s6, PT_R29
|
|
cfi_st s7, PT_R30
|
|
cfi_st s8, PT_R31
|
|
csrrd t0, LOONGARCH_CSR_CRMD
|
|
andi t0, t0, 0x7 /* extract bit[1:0] PLV, bit[2] IE */
|
|
LONG_S t0, sp, PT_CRMD
|
|
.endm
|
|
|
|
.macro restore_all_base_regs
|
|
cfi_ld tp, PT_R2
|
|
cfi_ld a0, PT_R4
|
|
cfi_ld a1, PT_R5
|
|
cfi_ld a2, PT_R6
|
|
cfi_ld a3, PT_R7
|
|
cfi_ld a4, PT_R8
|
|
cfi_ld a5, PT_R9
|
|
cfi_ld a6, PT_R10
|
|
cfi_ld a7, PT_R11
|
|
cfi_ld t0, PT_R12
|
|
cfi_ld t1, PT_R13
|
|
cfi_ld t2, PT_R14
|
|
cfi_ld t3, PT_R15
|
|
cfi_ld t4, PT_R16
|
|
cfi_ld t5, PT_R17
|
|
cfi_ld t6, PT_R18
|
|
cfi_ld t7, PT_R19
|
|
cfi_ld t8, PT_R20
|
|
cfi_ld u0, PT_R21
|
|
cfi_ld fp, PT_R22
|
|
cfi_ld s0, PT_R23
|
|
cfi_ld s1, PT_R24
|
|
cfi_ld s2, PT_R25
|
|
cfi_ld s3, PT_R26
|
|
cfi_ld s4, PT_R27
|
|
cfi_ld s5, PT_R28
|
|
cfi_ld s6, PT_R29
|
|
cfi_ld s7, PT_R30
|
|
cfi_ld s8, PT_R31
|
|
LONG_L t0, sp, PT_CRMD
|
|
li.d t1, 0x7 /* mask bit[1:0] PLV, bit[2] IE */
|
|
csrxchg t0, t1, LOONGARCH_CSR_CRMD
|
|
.endm
|
|
|
|
SYM_CODE_START(__kretprobe_trampoline)
|
|
addi.d sp, sp, -PT_SIZE
|
|
save_all_base_regs
|
|
|
|
addi.d t0, sp, PT_SIZE
|
|
LONG_S t0, sp, PT_R3
|
|
|
|
move a0, sp /* pt_regs */
|
|
|
|
bl trampoline_probe_handler
|
|
|
|
/* use the result as the return-address */
|
|
move ra, a0
|
|
|
|
restore_all_base_regs
|
|
addi.d sp, sp, PT_SIZE
|
|
|
|
jr ra
|
|
SYM_CODE_END(__kretprobe_trampoline)
|