1/* SPDX-License-Identifier: GPL-2.0+ */ 2#include <linux/linkage.h> 3#include <asm/stackframe.h> 4 5 .text 6 7 .macro save_all_base_regs 8 cfi_st ra, PT_R1 9 cfi_st tp, PT_R2 10 cfi_st a0, PT_R4 11 cfi_st a1, PT_R5 12 cfi_st a2, PT_R6 13 cfi_st a3, PT_R7 14 cfi_st a4, PT_R8 15 cfi_st a5, PT_R9 16 cfi_st a6, PT_R10 17 cfi_st a7, PT_R11 18 cfi_st t0, PT_R12 19 cfi_st t1, PT_R13 20 cfi_st t2, PT_R14 21 cfi_st t3, PT_R15 22 cfi_st t4, PT_R16 23 cfi_st t5, PT_R17 24 cfi_st t6, PT_R18 25 cfi_st t7, PT_R19 26 cfi_st t8, PT_R20 27 cfi_st fp, PT_R22 28 cfi_st s0, PT_R23 29 cfi_st s1, PT_R24 30 cfi_st s2, PT_R25 31 cfi_st s3, PT_R26 32 cfi_st s4, PT_R27 33 cfi_st s5, PT_R28 34 cfi_st s6, PT_R29 35 cfi_st s7, PT_R30 36 cfi_st s8, PT_R31 37 csrrd t0, LOONGARCH_CSR_CRMD 38 andi t0, t0, 0x7 /* extract bit[1:0] PLV, bit[2] IE */ 39 LONG_S t0, sp, PT_CRMD 40 .endm 41 42 .macro restore_all_base_regs 43 cfi_ld tp, PT_R2 44 cfi_ld a0, PT_R4 45 cfi_ld a1, PT_R5 46 cfi_ld a2, PT_R6 47 cfi_ld a3, PT_R7 48 cfi_ld a4, PT_R8 49 cfi_ld a5, PT_R9 50 cfi_ld a6, PT_R10 51 cfi_ld a7, PT_R11 52 cfi_ld t0, PT_R12 53 cfi_ld t1, PT_R13 54 cfi_ld t2, PT_R14 55 cfi_ld t3, PT_R15 56 cfi_ld t4, PT_R16 57 cfi_ld t5, PT_R17 58 cfi_ld t6, PT_R18 59 cfi_ld t7, PT_R19 60 cfi_ld t8, PT_R20 61 cfi_ld fp, PT_R22 62 cfi_ld s0, PT_R23 63 cfi_ld s1, PT_R24 64 cfi_ld s2, PT_R25 65 cfi_ld s3, PT_R26 66 cfi_ld s4, PT_R27 67 cfi_ld s5, PT_R28 68 cfi_ld s6, PT_R29 69 cfi_ld s7, PT_R30 70 cfi_ld s8, PT_R31 71 LONG_L t0, sp, PT_CRMD 72 LONG_LI t1, 0x7 /* mask bit[1:0] PLV, bit[2] IE */ 73 csrxchg t0, t1, LOONGARCH_CSR_CRMD 74 .endm 75 76SYM_CODE_START(arch_rethook_trampoline) 77 UNWIND_HINT_UNDEFINED 78 PTR_ADDI sp, sp, -PT_SIZE 79 save_all_base_regs 80 81 PTR_ADDI t0, sp, PT_SIZE 82 LONG_S t0, sp, PT_R3 83 84 move a0, sp /* pt_regs */ 85 86 bl arch_rethook_trampoline_callback 87 88 /* use the result as the return-address */ 89 move ra, a0 90 91 restore_all_base_regs 92 PTR_ADDI sp, sp, PT_SIZE 93 94 jr ra 95SYM_CODE_END(arch_rethook_trampoline) 96