kernel.git/arch/riscv/kernel/stacktrace.c, branch linux-4.19.y

riscv: stacktrace: Fix undefined reference to `walk_stackframe'

2020-06-03T06:19:30Z

[ Upstream commit 0502bee37cdef755d63eee60236562e5605e2480 ] Drop static declaration to fix following build error if FRAME_POINTER disabled, riscv64-linux-ld: arch/riscv/kernel/perf_callchain.o: in function `.L0': perf_callchain.c:(.text+0x2b8): undefined reference to `walk_stackframe' Reported-by: Hulk Robot Signed-off-by: Kefeng Wang Signed-off-by: Palmer Dabbelt Signed-off-by: Sasha Levin

riscv/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support

2018-04-03T02:59:13Z

In walk_stackframe, the pc now receives the address from calling ftrace_graph_ret_addr instead of manual calculation. Note that the original calculation, pc = frame->ra - 4 is buggy when the instruction at the return address happened to be a compressed inst. But since it is not a critical part of ftrace, it is ignored for now to ease the review process. Cc: Greentime Hu Signed-off-by: Alan Kao Signed-off-by: Palmer Dabbelt

RISC-V: Generic library routines and assembly

2017-09-26T22:26:45Z

This patch contains code that is more specific to the RISC-V ISA than it is to Linux. It contains string and math operations, C wrappers for various assembly instructions, stack walking code, and uaccess. Signed-off-by: Palmer Dabbelt