Chen Huang f766f77a74 riscv/stacktrace: Fix stack output without ra on the stack top ... When a function doesn't have a callee, then it will not push ra into the stack, such as lkdtm_BUG() function, addi sp,sp,-16 sd s0,8(sp) addi s0,sp,16 ebreak The struct stackframe use {fp,ra} to get information from stack, if walk_stackframe() with pr_regs, we will obtain wrong value and bad stacktrace, [<ffffffe00066c56c>] lkdtm_BUG+0x6/0x8 ---[ end trace 18da3fbdf08e25d5 ]--- Correct the next fp and pc, after that, full stacktrace shown as expects, [<ffffffe00066c56c>] lkdtm_BUG+0x6/0x8 [<ffffffe0008b24a4>] lkdtm_do_action+0x14/0x1c [<ffffffe00066c372>] direct_entry+0xc0/0x10a [<ffffffe000439f86>] full_proxy_write+0x42/0x6a [<ffffffe000309626>] vfs_write+0x7e/0x214 [<ffffffe00030992a>] ksys_write+0x98/0xc0 [<ffffffe000309960>] sys_write+0xe/0x16 [<ffffffe0002014bc>] ret_from_syscall+0x0/0x2 ---[ end trace 61917f3d9a9fadcd ]--- Signed-off-by: Chen Huang <chenhuang5@huawei.com> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>		2021-01-14 15:09:13 -08:00
..
boot	riscv: Fix Canaan Kendryte K210 device tree	2021-01-14 15:08:47 -08:00
configs	riscv: Use vendor name for K210 SoC support	2021-01-14 15:08:46 -08:00
include	riscv: Add dump stack in show_regs	2021-01-14 15:09:11 -08:00
kernel	riscv/stacktrace: Fix stack output without ra on the stack top	2021-01-14 15:09:13 -08:00
lib	riscv: Add support for function error injection	2021-01-14 15:09:09 -08:00
mm	riscv: Add uprobes supported	2021-01-14 15:09:08 -08:00
net	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
Kbuild	riscv: Allow device trees to be built into the kernel	2020-05-18 11:38:05 -07:00
Kconfig	riscv: Enable per-task stack canaries	2021-01-14 15:09:10 -08:00
Kconfig.debug
Kconfig.socs	riscv: Add Canaan Kendryte K210 reset controller	2021-01-14 15:08:53 -08:00
Makefile	riscv: Enable per-task stack canaries	2021-01-14 15:09:10 -08:00