| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * Author: Patrick Stählin <me@packi.ch> |
| */ |
| #include <linux/linkage.h> |
| |
| #include <asm/asm.h> |
| #include <asm/asm-offsets.h> |
| |
| .text |
| .altmacro |
| |
| .macro save_all_base_regs |
| REG_S x1, PT_RA(sp) |
| REG_S x3, PT_GP(sp) |
| REG_S x4, PT_TP(sp) |
| REG_S x5, PT_T0(sp) |
| REG_S x6, PT_T1(sp) |
| REG_S x7, PT_T2(sp) |
| REG_S x8, PT_S0(sp) |
| REG_S x9, PT_S1(sp) |
| REG_S x10, PT_A0(sp) |
| REG_S x11, PT_A1(sp) |
| REG_S x12, PT_A2(sp) |
| REG_S x13, PT_A3(sp) |
| REG_S x14, PT_A4(sp) |
| REG_S x15, PT_A5(sp) |
| REG_S x16, PT_A6(sp) |
| REG_S x17, PT_A7(sp) |
| REG_S x18, PT_S2(sp) |
| REG_S x19, PT_S3(sp) |
| REG_S x20, PT_S4(sp) |
| REG_S x21, PT_S5(sp) |
| REG_S x22, PT_S6(sp) |
| REG_S x23, PT_S7(sp) |
| REG_S x24, PT_S8(sp) |
| REG_S x25, PT_S9(sp) |
| REG_S x26, PT_S10(sp) |
| REG_S x27, PT_S11(sp) |
| REG_S x28, PT_T3(sp) |
| REG_S x29, PT_T4(sp) |
| REG_S x30, PT_T5(sp) |
| REG_S x31, PT_T6(sp) |
| .endm |
| |
| .macro restore_all_base_regs |
| REG_L x3, PT_GP(sp) |
| REG_L x4, PT_TP(sp) |
| REG_L x5, PT_T0(sp) |
| REG_L x6, PT_T1(sp) |
| REG_L x7, PT_T2(sp) |
| REG_L x8, PT_S0(sp) |
| REG_L x9, PT_S1(sp) |
| REG_L x10, PT_A0(sp) |
| REG_L x11, PT_A1(sp) |
| REG_L x12, PT_A2(sp) |
| REG_L x13, PT_A3(sp) |
| REG_L x14, PT_A4(sp) |
| REG_L x15, PT_A5(sp) |
| REG_L x16, PT_A6(sp) |
| REG_L x17, PT_A7(sp) |
| REG_L x18, PT_S2(sp) |
| REG_L x19, PT_S3(sp) |
| REG_L x20, PT_S4(sp) |
| REG_L x21, PT_S5(sp) |
| REG_L x22, PT_S6(sp) |
| REG_L x23, PT_S7(sp) |
| REG_L x24, PT_S8(sp) |
| REG_L x25, PT_S9(sp) |
| REG_L x26, PT_S10(sp) |
| REG_L x27, PT_S11(sp) |
| REG_L x28, PT_T3(sp) |
| REG_L x29, PT_T4(sp) |
| REG_L x30, PT_T5(sp) |
| REG_L x31, PT_T6(sp) |
| .endm |
| |
| ENTRY(kretprobe_trampoline) |
| addi sp, sp, -(PT_SIZE_ON_STACK) |
| save_all_base_regs |
| |
| move a0, sp /* pt_regs */ |
| |
| call trampoline_probe_handler |
| |
| /* use the result as the return-address */ |
| move ra, a0 |
| |
| restore_all_base_regs |
| addi sp, sp, PT_SIZE_ON_STACK |
| |
| ret |
| ENDPROC(kretprobe_trampoline) |
