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kexec: new syscall kexec_file_load() declaration
This is the new syscall kexec_file_load() declaration/interface. I have reserved the syscall number only for x86_64 so far. Other architectures (including i386) can reserve syscall number when they enable the support for this new syscall. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Borislav Petkov <bp@suse.de> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Greg Kroah-Hartman <greg@kroah.com> Cc: Dave Young <dyoung@redhat.com> Cc: WANG Chao <chaowang@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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4 changed files with 13 additions and 0 deletions
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@ -326,6 +326,7 @@
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317 common seccomp sys_seccomp
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317 common seccomp sys_seccomp
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318 common getrandom sys_getrandom
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318 common getrandom sys_getrandom
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319 common memfd_create sys_memfd_create
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319 common memfd_create sys_memfd_create
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320 common kexec_file_load sys_kexec_file_load
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#
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#
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# x32-specific system call numbers start at 512 to avoid cache impact
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# x32-specific system call numbers start at 512 to avoid cache impact
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@ -317,6 +317,10 @@ asmlinkage long sys_restart_syscall(void);
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asmlinkage long sys_kexec_load(unsigned long entry, unsigned long nr_segments,
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asmlinkage long sys_kexec_load(unsigned long entry, unsigned long nr_segments,
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struct kexec_segment __user *segments,
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struct kexec_segment __user *segments,
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unsigned long flags);
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unsigned long flags);
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asmlinkage long sys_kexec_file_load(int kernel_fd, int initrd_fd,
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unsigned long cmdline_len,
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const char __user *cmdline_ptr,
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unsigned long flags);
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asmlinkage long sys_exit(int error_code);
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asmlinkage long sys_exit(int error_code);
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asmlinkage long sys_exit_group(int error_code);
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asmlinkage long sys_exit_group(int error_code);
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@ -1058,6 +1058,13 @@ COMPAT_SYSCALL_DEFINE4(kexec_load, compat_ulong_t, entry,
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}
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}
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#endif
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#endif
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SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd,
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unsigned long, cmdline_len, const char __user *, cmdline_ptr,
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unsigned long, flags)
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{
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return -ENOSYS;
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}
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void crash_kexec(struct pt_regs *regs)
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void crash_kexec(struct pt_regs *regs)
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{
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{
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/* Take the kexec_mutex here to prevent sys_kexec_load
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/* Take the kexec_mutex here to prevent sys_kexec_load
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@ -25,6 +25,7 @@ cond_syscall(sys_swapon);
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cond_syscall(sys_swapoff);
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cond_syscall(sys_swapoff);
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cond_syscall(sys_kexec_load);
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cond_syscall(sys_kexec_load);
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cond_syscall(compat_sys_kexec_load);
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cond_syscall(compat_sys_kexec_load);
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cond_syscall(sys_kexec_file_load);
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cond_syscall(sys_init_module);
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cond_syscall(sys_init_module);
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cond_syscall(sys_finit_module);
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cond_syscall(sys_finit_module);
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cond_syscall(sys_delete_module);
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cond_syscall(sys_delete_module);
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