diff options
| author | Hari Bathini <hbathini@linux.ibm.com> | 2020-07-29 14:43:14 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-29 16:47:54 +0300 |
| commit | cb350c1f1f867db16725f1bb06be033ece19e998 (patch) | |
| tree | 8997d598bfb8be118dbb31ee156189afe8c55aa0 /arch/powerpc/kexec/elf_64.c | |
| parent | 1a1cf93c200581c72a3cd521e1e0a1a3b5d0077d (diff) | |
| download | linux-cb350c1f1f867db16725f1bb06be033ece19e998.tar.xz | |
powerpc/kexec_file: Prepare elfcore header for crashing kernel
Prepare elf headers for the crashing kernel's core file using
crash_prepare_elf64_headers() and pass on this info to kdump kernel by
updating its command line with elfcorehdr parameter. Also, add
elfcorehdr location to reserve map to avoid it from being stomped on
while booting.
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Tested-by: Pingfan Liu <piliu@redhat.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
[mpe: Ensure cmdline is nul terminated]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/159602298855.575379.15819225623219909517.stgit@hbathini
Diffstat (limited to 'arch/powerpc/kexec/elf_64.c')
| -rw-r--r-- | arch/powerpc/kexec/elf_64.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/kexec/elf_64.c b/arch/powerpc/kexec/elf_64.c index 76e2fc7e6dc3..d0e459bb2f05 100644 --- a/arch/powerpc/kexec/elf_64.c +++ b/arch/powerpc/kexec/elf_64.c @@ -35,6 +35,7 @@ static void *elf64_load(struct kimage *image, char *kernel_buf, void *fdt; const void *slave_code; struct elfhdr ehdr; + char *modified_cmdline = NULL; struct kexec_elf_info elf_info; struct kexec_buf kbuf = { .image = image, .buf_min = 0, .buf_max = ppc64_rma_size }; @@ -75,6 +76,16 @@ static void *elf64_load(struct kimage *image, char *kernel_buf, pr_err("Failed to load kdump kernel segments\n"); goto out; } + + /* Setup cmdline for kdump kernel case */ + modified_cmdline = setup_kdump_cmdline(image, cmdline, + cmdline_len); + if (!modified_cmdline) { + pr_err("Setting up cmdline for kdump kernel failed\n"); + ret = -EINVAL; + goto out; + } + cmdline = modified_cmdline; } if (initrd != NULL) { @@ -131,6 +142,7 @@ static void *elf64_load(struct kimage *image, char *kernel_buf, pr_err("Error setting up the purgatory.\n"); out: + kfree(modified_cmdline); kexec_free_elf_info(&elf_info); /* Make kimage_file_post_load_cleanup free the fdt buffer for us. */ |