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