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s390/kernel: build a relocatable kernel

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This patch adds support for building a relocatable kernel with -fPIE.
The kernel will be relocated to 0 early in the boot process.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Gerald Schaefer
2019-02-03 21:35:45 +01:00
committed by Martin Schwidefsky
parent 833b441ec0
commit 805bc0bc23
11 changed files with 124 additions and 42 deletions
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arch/s390/include/asm/kexec.h
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@@ -71,6 +71,8 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len);
void *kexec_file_add_components(struct kimage *image,
int (*add_kernel)(struct kimage *image,
struct s390_load_data *data));
int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val,
unsigned long addr);
extern const struct kexec_file_ops s390_kexec_image_ops;
extern const struct kexec_file_ops s390_kexec_elf_ops;