From: Vivek Goyal Date: Fri, 8 Aug 2014 21:25:55 +0000 (-0700) Subject: kexec: new syscall kexec_file_load() declaration X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f0895685c7fd8c938c91a9d8a6f7c11f22df58d2;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Cc: Michael Kerrisk Cc: Borislav Petkov Cc: Yinghai Lu Cc: Eric Biederman Cc: H. Peter Anvin Cc: Matthew Garrett Cc: Greg Kroah-Hartman Cc: Dave Young Cc: WANG Chao Cc: Baoquan He Cc: Andy Lutomirski Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl index ca2b9aa78c81..35dd922727b9 100644 --- a/arch/x86/syscalls/syscall_64.tbl +++ b/arch/x86/syscalls/syscall_64.tbl @@ -326,6 +326,7 @@ 317 common seccomp sys_seccomp 318 common getrandom sys_getrandom 319 common memfd_create sys_memfd_create +320 common kexec_file_load sys_kexec_file_load # # x32-specific system call numbers start at 512 to avoid cache impact diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 15a069425cbf..0f86d85a9ce4 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -317,6 +317,10 @@ asmlinkage long sys_restart_syscall(void); asmlinkage long sys_kexec_load(unsigned long entry, unsigned long nr_segments, struct kexec_segment __user *segments, unsigned long flags); +asmlinkage long sys_kexec_file_load(int kernel_fd, int initrd_fd, + unsigned long cmdline_len, + const char __user *cmdline_ptr, + unsigned long flags); asmlinkage long sys_exit(int error_code); asmlinkage long sys_exit_group(int error_code); diff --git a/kernel/kexec.c b/kernel/kexec.c index bfdda316697d..ec4386c1b94f 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -1058,6 +1058,13 @@ COMPAT_SYSCALL_DEFINE4(kexec_load, compat_ulong_t, entry, } #endif +SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd, + unsigned long, cmdline_len, const char __user *, cmdline_ptr, + unsigned long, flags) +{ + return -ENOSYS; +} + void crash_kexec(struct pt_regs *regs) { /* Take the kexec_mutex here to prevent sys_kexec_load diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c index 1f79e3714533..391d4ddb6f4b 100644 --- a/kernel/sys_ni.c +++ b/kernel/sys_ni.c @@ -25,6 +25,7 @@ cond_syscall(sys_swapon); cond_syscall(sys_swapoff); cond_syscall(sys_kexec_load); cond_syscall(compat_sys_kexec_load); +cond_syscall(sys_kexec_file_load); cond_syscall(sys_init_module); cond_syscall(sys_finit_module); cond_syscall(sys_delete_module);