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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
| commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
| tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/riscv/kernel/mcount-dyn.S | |
| parent | Initial commit. (diff) | |
| download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip | |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/riscv/kernel/mcount-dyn.S')
| -rw-r--r-- | arch/riscv/kernel/mcount-dyn.S | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/arch/riscv/kernel/mcount-dyn.S b/arch/riscv/kernel/mcount-dyn.S new file mode 100644 index 0000000000..669b8697aa --- /dev/null +++ b/arch/riscv/kernel/mcount-dyn.S @@ -0,0 +1,142 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2017 Andes Technology Corporation */ + +#include <linux/init.h> +#include <linux/linkage.h> +#include <asm/asm.h> +#include <asm/csr.h> +#include <asm/unistd.h> +#include <asm/thread_info.h> +#include <asm/asm-offsets.h> +#include <asm-generic/export.h> +#include <asm/ftrace.h> + + .text + +#define FENTRY_RA_OFFSET 8 +#define ABI_SIZE_ON_STACK 80 +#define ABI_A0 0 +#define ABI_A1 8 +#define ABI_A2 16 +#define ABI_A3 24 +#define ABI_A4 32 +#define ABI_A5 40 +#define ABI_A6 48 +#define ABI_A7 56 +#define ABI_T0 64 +#define ABI_RA 72 + + .macro SAVE_ABI + addi sp, sp, -ABI_SIZE_ON_STACK + + REG_S a0, ABI_A0(sp) + REG_S a1, ABI_A1(sp) + REG_S a2, ABI_A2(sp) + REG_S a3, ABI_A3(sp) + REG_S a4, ABI_A4(sp) + REG_S a5, ABI_A5(sp) + REG_S a6, ABI_A6(sp) + REG_S a7, ABI_A7(sp) + REG_S t0, ABI_T0(sp) + REG_S ra, ABI_RA(sp) + .endm + + .macro RESTORE_ABI + REG_L a0, ABI_A0(sp) + REG_L a1, ABI_A1(sp) + REG_L a2, ABI_A2(sp) + REG_L a3, ABI_A3(sp) + REG_L a4, ABI_A4(sp) + REG_L a5, ABI_A5(sp) + REG_L a6, ABI_A6(sp) + REG_L a7, ABI_A7(sp) + REG_L t0, ABI_T0(sp) + REG_L ra, ABI_RA(sp) + + addi sp, sp, ABI_SIZE_ON_STACK + .endm + +#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS + .macro SAVE_ALL + addi sp, sp, -PT_SIZE_ON_STACK + + REG_S t0, PT_EPC(sp) + REG_S x1, PT_RA(sp) + REG_S x2, PT_SP(sp) + REG_S x3, PT_GP(sp) + REG_S x4, PT_TP(sp) + REG_S x5, PT_T0(sp) + save_from_x6_to_x31 + .endm + + .macro RESTORE_ALL + REG_L x1, PT_RA(sp) + REG_L x2, PT_SP(sp) + REG_L x3, PT_GP(sp) + REG_L x4, PT_TP(sp) + /* Restore t0 with PT_EPC */ + REG_L x5, PT_EPC(sp) + restore_from_x6_to_x31 + + addi sp, sp, PT_SIZE_ON_STACK + .endm +#endif /* CONFIG_DYNAMIC_FTRACE_WITH_REGS */ + +ENTRY(ftrace_caller) + SAVE_ABI + + addi a0, t0, -FENTRY_RA_OFFSET + la a1, function_trace_op + REG_L a2, 0(a1) + mv a1, ra + mv a3, sp + +ftrace_call: + .global ftrace_call + call ftrace_stub + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + addi a0, sp, ABI_RA + REG_L a1, ABI_T0(sp) + addi a1, a1, -FENTRY_RA_OFFSET +#ifdef HAVE_FUNCTION_GRAPH_FP_TEST + mv a2, s0 +#endif +ftrace_graph_call: + .global ftrace_graph_call + call ftrace_stub +#endif + RESTORE_ABI + jr t0 +ENDPROC(ftrace_caller) + +#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS +ENTRY(ftrace_regs_caller) + SAVE_ALL + + addi a0, t0, -FENTRY_RA_OFFSET + la a1, function_trace_op + REG_L a2, 0(a1) + mv a1, ra + mv a3, sp + +ftrace_regs_call: + .global ftrace_regs_call + call ftrace_stub + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + addi a0, sp, PT_RA + REG_L a1, PT_EPC(sp) + addi a1, a1, -FENTRY_RA_OFFSET +#ifdef HAVE_FUNCTION_GRAPH_FP_TEST + mv a2, s0 +#endif +ftrace_graph_regs_call: + .global ftrace_graph_regs_call + call ftrace_stub +#endif + + RESTORE_ALL + jr t0 +ENDPROC(ftrace_regs_caller) +#endif /* CONFIG_DYNAMIC_FTRACE_WITH_REGS */ |