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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-10 12:02:25 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-10 12:02:25 +0900
commit42859eea96ba6beabfb0369a1eeffa3c7d2bd9cb (patch)
treefa38aeda0d6e7a4c48a882b166b8643594a1ad50 /include
parentf59b51fe3d3092c08d7d554ecb40db24011b2ebc (diff)
parentf322220d6159455da2b5a8a596d802c8695fed30 (diff)
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull generic execve() changes from Al Viro: "This introduces the generic kernel_thread() and kernel_execve() functions, and switches x86, arm, alpha, um and s390 over to them." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (26 commits) s390: convert to generic kernel_execve() s390: switch to generic kernel_thread() s390: fold kernel_thread_helper() into ret_from_fork() s390: fold execve_tail() into start_thread(), convert to generic sys_execve() um: switch to generic kernel_thread() x86, um/x86: switch to generic sys_execve and kernel_execve x86: split ret_from_fork alpha: introduce ret_from_kernel_execve(), switch to generic kernel_execve() alpha: switch to generic kernel_thread() alpha: switch to generic sys_execve() arm: get rid of execve wrapper, switch to generic execve() implementation arm: optimized current_pt_regs() arm: introduce ret_from_kernel_execve(), switch to generic kernel_execve() arm: split ret_from_fork, simplify kernel_thread() [based on patch by rmk] generic sys_execve() generic kernel_execve() new helper: current_pt_regs() preparation for generic kernel_thread() um: kill thread->forking um: let signal_delivered() do SIGTRAP on singlestepping into handler ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/binfmts.h6
-rw-r--r--include/linux/compat.h8
-rw-r--r--include/linux/ptrace.h4
-rw-r--r--include/linux/sched.h3
4 files changed, 19 insertions, 2 deletions
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index 37935c2d2e8..26531f32bbb 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -19,6 +19,8 @@ struct pt_regs;
#ifdef __KERNEL__
#include <linux/sched.h>
+#include <linux/unistd.h>
+#include <asm/exec.h>
#define CORENAME_MAX_SIZE 128
@@ -135,5 +137,9 @@ extern void install_exec_creds(struct linux_binprm *bprm);
extern void set_binfmt(struct linux_binfmt *new);
extern void free_bprm(struct linux_binprm *);
+#ifdef __ARCH_WANT_KERNEL_EXECVE
+extern void ret_from_kernel_execve(struct pt_regs *normal) __noreturn;
+#endif
+
#endif /* __KERNEL__ */
#endif /* _LINUX_BINFMTS_H */
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 3f53d002c7c..d0ced1011f2 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -284,8 +284,12 @@ asmlinkage ssize_t compat_sys_pwritev(unsigned long fd,
const struct compat_iovec __user *vec,
unsigned long vlen, u32 pos_low, u32 pos_high);
-int compat_do_execve(char *filename, compat_uptr_t __user *argv,
- compat_uptr_t __user *envp, struct pt_regs *regs);
+int compat_do_execve(const char *filename, const compat_uptr_t __user *argv,
+ const compat_uptr_t __user *envp, struct pt_regs *regs);
+#ifdef __ARCH_WANT_SYS_EXECVE
+asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
+ const compat_uptr_t __user *envp);
+#endif
asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index 3db698aee34..1d24ffad59c 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -401,6 +401,10 @@ static inline void user_single_step_siginfo(struct task_struct *tsk,
#define arch_ptrace_stop(code, info) do { } while (0)
#endif
+#ifndef current_pt_regs
+#define current_pt_regs() task_pt_regs(current)
+#endif
+
extern int task_current_syscall(struct task_struct *target, long *callno,
unsigned long args[6], unsigned int maxargs,
unsigned long *sp, unsigned long *pc);
diff --git a/include/linux/sched.h b/include/linux/sched.h
index c2070e92a9d..a83ca5816ec 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2332,6 +2332,9 @@ extern int do_execve(const char *,
const char __user * const __user *, struct pt_regs *);
extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
struct task_struct *fork_idle(int);
+#ifdef CONFIG_GENERIC_KERNEL_THREAD
+extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
+#endif
extern void set_task_comm(struct task_struct *tsk, char *from);
extern char *get_task_comm(char *to, struct task_struct *tsk);