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-rw-r--r--tools/perf/arch/riscv/util/unwind-libdw.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/tools/perf/arch/riscv/util/unwind-libdw.c b/tools/perf/arch/riscv/util/unwind-libdw.c
new file mode 100644
index 000000000..19536e172
--- /dev/null
+++ b/tools/perf/arch/riscv/util/unwind-libdw.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. */
+
+#include <elfutils/libdwfl.h>
+#include "../../util/unwind-libdw.h"
+#include "../../util/perf_regs.h"
+#include "../../util/event.h"
+
+bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
+{
+ struct unwind_info *ui = arg;
+ struct regs_dump *user_regs = &ui->sample->user_regs;
+ Dwarf_Word dwarf_regs[32];
+
+#define REG(r) ({ \
+ Dwarf_Word val = 0; \
+ perf_reg_value(&val, user_regs, PERF_REG_RISCV_##r); \
+ val; \
+})
+
+ dwarf_regs[0] = 0;
+ dwarf_regs[1] = REG(RA);
+ dwarf_regs[2] = REG(SP);
+ dwarf_regs[3] = REG(GP);
+ dwarf_regs[4] = REG(TP);
+ dwarf_regs[5] = REG(T0);
+ dwarf_regs[6] = REG(T1);
+ dwarf_regs[7] = REG(T2);
+ dwarf_regs[8] = REG(S0);
+ dwarf_regs[9] = REG(S1);
+ dwarf_regs[10] = REG(A0);
+ dwarf_regs[11] = REG(A1);
+ dwarf_regs[12] = REG(A2);
+ dwarf_regs[13] = REG(A3);
+ dwarf_regs[14] = REG(A4);
+ dwarf_regs[15] = REG(A5);
+ dwarf_regs[16] = REG(A6);
+ dwarf_regs[17] = REG(A7);
+ dwarf_regs[18] = REG(S2);
+ dwarf_regs[19] = REG(S3);
+ dwarf_regs[20] = REG(S4);
+ dwarf_regs[21] = REG(S5);
+ dwarf_regs[22] = REG(S6);
+ dwarf_regs[23] = REG(S7);
+ dwarf_regs[24] = REG(S8);
+ dwarf_regs[25] = REG(S9);
+ dwarf_regs[26] = REG(S10);
+ dwarf_regs[27] = REG(S11);
+ dwarf_regs[28] = REG(T3);
+ dwarf_regs[29] = REG(T4);
+ dwarf_regs[30] = REG(T5);
+ dwarf_regs[31] = REG(T6);
+ dwfl_thread_state_register_pc(thread, REG(PC));
+
+ return dwfl_thread_state_registers(thread, 0, PERF_REG_RISCV_MAX,
+ dwarf_regs);
+}