72 lines
2.7 KiB
Diff
72 lines
2.7 KiB
Diff
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From a8639a304b7b62384fc1c747c35eee7728ce583f Mon Sep 17 00:00:00 2001
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Message-Id: <a8639a304b7b62384fc1c747c35eee7728ce583f.1522755494.git.msuchanek@suse.de>
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In-Reply-To: <e810acd57d9fc2d7ba3b0e95d470c20de9948462.1522755494.git.msuchanek@suse.de>
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References: <e810acd57d9fc2d7ba3b0e95d470c20de9948462.1522755494.git.msuchanek@suse.de>
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From: Michal Suchanek <msuchanek@suse.de>
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Date: Mon, 26 Feb 2018 12:24:44 +0100
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Subject: [PATCH v6 4/6] kexec: Add option to revert -s
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The undocumented -s option selects KEXEC_FILE_LOAD syscall but there is
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no option to select KEXEC_LOAD syscall. Add it so -s can be reverted.
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Signed-off-by: Michal Suchanek <msuchanek@suse.de>
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---
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v6: add description to help text
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---
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kexec/kexec.c | 5 +++++
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kexec/kexec.h | 4 +++-
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2 files changed, 8 insertions(+), 1 deletion(-)
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diff --git a/kexec/kexec.c b/kexec/kexec.c
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index 68ae0594d4a7..87689311af2f 100644
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--- a/kexec/kexec.c
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+++ b/kexec/kexec.c
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@@ -1005,6 +1005,8 @@ void usage(void)
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" preserve context)\n"
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" to original kernel.\n"
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" -s, --kexec-file-syscall Use file based syscall for kexec operation\n"
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+ " -c, --kexec-syscall Use the kexec_load syscall for for compatibility\n"
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+ " with systems that don't support -s (default)\n"
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" -d, --debug Enable debugging to help spot a failure.\n"
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" -S, --status Return 0 if the type (by default crash) is loaded.\n"
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"\n"
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@@ -1368,6 +1370,9 @@ int main(int argc, char *argv[])
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case OPT_KEXEC_FILE_SYSCALL:
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do_kexec_file_syscall = 1;
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break;
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+ case OPT_KEXEC_SYSCALL:
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+ do_kexec_file_syscall = 0;
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+ break;
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case OPT_STATUS:
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do_status = 1;
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break;
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diff --git a/kexec/kexec.h b/kexec/kexec.h
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index 26225d2c002a..9fd0355eacd0 100644
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--- a/kexec/kexec.h
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+++ b/kexec/kexec.h
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@@ -219,6 +219,7 @@ extern int file_types;
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#define OPT_TYPE 't'
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#define OPT_PANIC 'p'
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#define OPT_KEXEC_FILE_SYSCALL 's'
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+#define OPT_KEXEC_SYSCALL 'c'
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#define OPT_STATUS 'S'
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#define OPT_MEM_MIN 256
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#define OPT_MEM_MAX 257
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@@ -246,11 +247,12 @@ extern int file_types;
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{ "mem-max", 1, 0, OPT_MEM_MAX }, \
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{ "reuseinitrd", 0, 0, OPT_REUSE_INITRD }, \
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{ "kexec-file-syscall", 0, 0, OPT_KEXEC_FILE_SYSCALL }, \
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+ { "kexec-syscall", 0, 0, OPT_KEXEC_SYSCALL }, \
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{ "debug", 0, 0, OPT_DEBUG }, \
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{ "status", 0, 0, OPT_STATUS }, \
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{ "print-ckr-size", 0, 0, OPT_PRINT_CKR_SIZE }, \
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-#define KEXEC_OPT_STR "h?vdfxyluet:psS"
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+#define KEXEC_OPT_STR "h?vdfxyluet:pscS"
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extern void dbgprint_mem_range(const char *prefix, struct memory_range *mr, int nr_mr);
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extern void die(const char *fmt, ...)
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--
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2.13.6
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