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| author | Vasily Gorbik <gor@linux.ibm.com> | 2020-11-10 19:05:35 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2020-11-20 21:19:11 +0300 |
| commit | 8977ab65b894d889c3919581bf545ed106a9a1a5 (patch) | |
| tree | efa9ed3c411a6323f15a546ea00914e7248b65ef /arch/s390/boot/head.S | |
| parent | 246218962e2175cd1dfa1e5467e9bffae5cc7b5e (diff) | |
| download | linux-8977ab65b894d889c3919581bf545ed106a9a1a5.tar.xz | |
s390/decompressor: add stacktrace support
Decompressor works on a single statically allocated stack. Stacktrace
implementation with -mbackchain just takes few lines of code.
Linux version 5.10.0-rc3-22793-g0f84a355b776-dirty (gor@tuxmaker) #27 SMP PREEMPT Mon Nov 9 17:30:18 CET 2020
Kernel fault: interruption code 0005 ilc:2
PSW : 0000000180000000 0000000000012f92 (parse_boot_command_line+0x27a/0x46c)
R:0 T:0 IO:0 EX:0 Key:0 M:0 W:0 P:0 AS:0 CC:0 PM:0 RI:0 EA:3
GPRS: 0000000000000000 00ffffffffffffff 0000000000000000 000000000001a62c
000000000000bf60 0000000000000000 00000000000003c0 0000000000000000
0000000000000080 000000000002322d 000000007f29ef20 0000000000efd018
000000000311c000 0000000000010070 0000000000012f82 000000000000bea8
Call Trace:
(sp:000000000000bea8 [<000000000002016e>] 000000000002016e)
sp:000000000000bf18 [<0000000000012408>] startup_kernel+0x88/0x2fc
sp:000000000000bf60 [<00000000000100c4>] startup_normal+0xb0/0xb0
Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/boot/head.S')
| -rw-r--r-- | arch/s390/boot/head.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/boot/head.S b/arch/s390/boot/head.S index cf70917f98e8..dacb7813f982 100644 --- a/arch/s390/boot/head.S +++ b/arch/s390/boot/head.S @@ -28,6 +28,7 @@ #include <asm/thread_info.h> #include <asm/page.h> #include <asm/ptrace.h> +#include "boot.h" #define ARCH_OFFSET 4 @@ -325,7 +326,7 @@ SYM_CODE_START_LOCAL(startup_normal) SYM_CODE_END(startup_normal) .Lstack: - .long 0x8000 + (1<<(PAGE_SHIFT+BOOT_STACK_ORDER)) - STACK_FRAME_OVERHEAD + .long BOOT_STACK_OFFSET + BOOT_STACK_SIZE - STACK_FRAME_OVERHEAD .align 8 6: .long 0x7fffffff,0xffffffff .Lext_new_psw: |