| /* 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 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 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(arch_rethook_trampoline) | |
| UNWIND_HINT_UNDEFINED | |
| 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 arch_rethook_trampoline_callback | |
| /* 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(arch_rethook_trampoline) |