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| author |   Alexander Egorenkov <egorenar@linux.ibm.com> | 2021-06-30 17:17:53 +0200 |
|---|---|---|
| committer |   Heiko Carstens <hca@linux.ibm.com> | 2021-07-27 09:39:13 +0200 |
| commit | 256d78d08177d72ae27621378699c9b35231d524 (patch) | |
| tree | aa4e609c90c455d2d282948263ea8b4353331f58 /arch/s390/boot/compressed | |
| parent | s390/boot: move all linker symbol declarations from c to h files (diff) | |
| download | linux-dev-256d78d08177d72ae27621378699c9b35231d524.tar.xz linux-dev-256d78d08177d72ae27621378699c9b35231d524.zip | |
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/compressed')
| -rw-r--r-- | arch/s390/boot/compressed/vmlinux.lds.S | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/s390/boot/compressed/vmlinux.lds.S b/arch/s390/boot/compressed/vmlinux.lds.S index 27a09c1c78f6..0bd8aaaa4b33 100644 --- a/arch/s390/boot/compressed/vmlinux.lds.S +++ b/arch/s390/boot/compressed/vmlinux.lds.S @@ -1,6 +1,8 @@ /* SPDX-License-Identifier: GPL-2.0 */ #include <asm-generic/vmlinux.lds.h> #include <asm/vmlinux.lds.h> +#include <asm/thread_info.h> +#include <asm/page.h> OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") OUTPUT_ARCH(s390:64-bit) @@ -69,6 +71,17 @@ SECTIONS *(.bss) *(.bss.*) *(COMMON) + /* + * Stacks for the decompressor + */ + . = ALIGN(PAGE_SIZE); + _dump_info_stack_start = .; + . += PAGE_SIZE; + _dump_info_stack_end = .; + . = ALIGN(PAGE_SIZE); + _stack_start = .; + . += BOOT_STACK_SIZE; + _stack_end = .; _ebss = .; } |