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authorAl Viro <viro@zeniv.linux.org.uk>2012-10-27 00:13:51 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-11-28 22:36:47 -0500
commit0ad9513d0f81584c25f3fc7ff582c382cc1a93f7 (patch)
tree1bf616181ff9fb07d413d5e949e9ea0527fc1915 /arch
parent415bfae9e9dbc2232f1797a3ac78a22049a75e06 (diff)
downloadlinux-linaro-stable-0ad9513d0f81584c25f3fc7ff582c382cc1a93f7.tar.gz
sh: switch to generic fork/vfork/clone
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/include/asm/syscalls_32.h10
-rw-r--r--arch/sh/include/asm/syscalls_64.h13
-rw-r--r--arch/sh/include/asm/unistd.h3
-rw-r--r--arch/sh/kernel/process_32.c52
-rw-r--r--arch/sh/kernel/process_64.c43
5 files changed, 11 insertions, 110 deletions
diff --git a/arch/sh/include/asm/syscalls_32.h b/arch/sh/include/asm/syscalls_32.h
index d2f89f1741f4..cc25485996bb 100644
--- a/arch/sh/include/asm/syscalls_32.h
+++ b/arch/sh/include/asm/syscalls_32.h
@@ -9,16 +9,6 @@
struct pt_regs;
-asmlinkage int sys_fork(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs);
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long parent_tidptr,
- unsigned long child_tidptr,
- struct pt_regs __regs);
-asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs);
asmlinkage int sys_sigsuspend(old_sigset_t mask);
asmlinkage int sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact);
diff --git a/arch/sh/include/asm/syscalls_64.h b/arch/sh/include/asm/syscalls_64.h
index 3fedd9f1fab5..d62e8eb22f74 100644
--- a/arch/sh/include/asm/syscalls_64.h
+++ b/arch/sh/include/asm/syscalls_64.h
@@ -9,19 +9,6 @@
struct pt_regs;
-asmlinkage int sys_fork(unsigned long r2, unsigned long r3,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs);
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs);
-asmlinkage int sys_vfork(unsigned long r2, unsigned long r3,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs);
-
/* Misc syscall related bits */
asmlinkage long long do_syscall_trace_enter(struct pt_regs *regs);
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
diff --git a/arch/sh/include/asm/unistd.h b/arch/sh/include/asm/unistd.h
index f1f4775766a6..43d3f26b2eab 100644
--- a/arch/sh/include/asm/unistd.h
+++ b/arch/sh/include/asm/unistd.h
@@ -29,6 +29,9 @@
# define __ARCH_WANT_SYS_SIGPROCMASK
# define __ARCH_WANT_SYS_RT_SIGACTION
# define __ARCH_WANT_SYS_EXECVE
+# define __ARCH_WANT_SYS_FORK
+# define __ARCH_WANT_SYS_VFORK
+# define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index fce8029de922..1786d16b6c64 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -129,7 +129,7 @@ asmlinkage void ret_from_kernel_thread(void);
int copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long arg,
- struct task_struct *p, struct pt_regs *regs)
+ struct task_struct *p, struct pt_regs *unused)
{
struct thread_info *ti = task_thread_info(p);
struct pt_regs *childregs;
@@ -164,9 +164,10 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
p->fpu_counter = 0;
return 0;
}
- *childregs = *regs;
+ *childregs = *current_pt_regs();
- childregs->regs[15] = usp;
+ if (usp)
+ childregs->regs[15] = usp;
ti->addr_limit = USER_DS;
if (clone_flags & CLONE_SETTLS)
@@ -217,51 +218,6 @@ __switch_to(struct task_struct *prev, struct task_struct *next)
return prev;
}
-asmlinkage int sys_fork(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
-{
-#ifdef CONFIG_MMU
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
- return do_fork(SIGCHLD, regs->regs[15], regs, 0, NULL, NULL);
-#else
- /* fork almost works, enough to trick you into looking elsewhere :-( */
- return -EINVAL;
-#endif
-}
-
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long parent_tidptr,
- unsigned long child_tidptr,
- struct pt_regs __regs)
-{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
- if (!newsp)
- newsp = regs->regs[15];
- return do_fork(clone_flags, newsp, regs, 0,
- (int __user *)parent_tidptr,
- (int __user *)child_tidptr);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
-{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->regs[15], regs,
- 0, NULL, NULL);
-}
-
unsigned long get_wchan(struct task_struct *p)
{
unsigned long pc;
diff --git a/arch/sh/kernel/process_64.c b/arch/sh/kernel/process_64.c
index 3a0f3fd3bb58..d5c86a8a3849 100644
--- a/arch/sh/kernel/process_64.c
+++ b/arch/sh/kernel/process_64.c
@@ -383,7 +383,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
save_fpu(current);
disable_fpu();
last_task_used_math = NULL;
- regs->sr |= SR_FD;
+ current_pt_regs()->sr |= SR_FD;
}
#endif
/* Copy from sh version */
@@ -399,7 +399,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
p->thread.pc = (unsigned long) ret_from_kernel_thread;
return 0;
}
- *childregs = *regs;
+ *childregs = *current_pt_regs();
/*
* Sign extend the edited stack.
@@ -407,7 +407,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
* 32-bit wide and context switch must take care
* of NEFF sign extension.
*/
- childregs->regs[15] = neff_sign_extend(usp);
+ if (usp)
+ childregs->regs[15] = neff_sign_extend(usp);
p->thread.uregs = childregs;
childregs->regs[9] = 0; /* Set return value for child */
@@ -418,42 +419,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
return 0;
}
-asmlinkage int sys_fork(unsigned long r2, unsigned long r3,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs)
-{
- return do_fork(SIGCHLD, pregs->regs[15], pregs, 0, 0, 0);
-}
-
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs)
-{
- if (!newsp)
- newsp = pregs->regs[15];
- return do_fork(clone_flags, newsp, pregs, 0, 0, 0);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-asmlinkage int sys_vfork(unsigned long r2, unsigned long r3,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, pregs->regs[15], pregs, 0, 0, 0);
-}
-
#ifdef CONFIG_FRAME_POINTER
static int in_sh64_switch_to(unsigned long pc)
{