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| author | Alexander Egorenkov <egorenar@linux.ibm.com> | 2021-06-30 18:17:53 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2021-07-27 10:39:13 +0300 |
| commit | 256d78d08177d72ae27621378699c9b35231d524 (patch) | |
| tree | aa4e609c90c455d2d282948263ea8b4353331f58 /arch/s390/boot/pgm_check_info.c | |
| parent | 7fadcc078785416b1e2423fc624e054bb5a6e3b0 (diff) | |
| download | linux-256d78d08177d72ae27621378699c9b35231d524.tar.xz | |
s390/boot: make stacks part of the decompressor's image
Instead of using constant addresses for the normal and dump-info stacks,
allocate both stacks in the decompressor's image and load the stack register
in a position-independent manner.
This will allow loading and entering the decompressor at an arbitrary
memory address without corrupting the content at the fixed addresses
used until now for both stacks. This is one of the prerequisites
for being able to kexec the decompressor from its load address without
relocating it first.
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/boot/pgm_check_info.c')
| -rw-r--r-- | arch/s390/boot/pgm_check_info.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/boot/pgm_check_info.c b/arch/s390/boot/pgm_check_info.c index 7126a1b3293d..209f6ae5a197 100644 --- a/arch/s390/boot/pgm_check_info.c +++ b/arch/s390/boot/pgm_check_info.c @@ -125,8 +125,8 @@ out: static noinline void print_stacktrace(void) { - struct stack_info boot_stack = { STACK_TYPE_TASK, BOOT_STACK_OFFSET, - BOOT_STACK_OFFSET + BOOT_STACK_SIZE }; + struct stack_info boot_stack = { STACK_TYPE_TASK, (unsigned long)_stack_start, + (unsigned long)_stack_end }; unsigned long sp = S390_lowcore.gpregs_save_area[15]; bool first = true; |