sh: switch to generic fork/vfork/clone
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
parent
415bfae9e9
commit
0ad9513d0f
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@ -9,16 +9,6 @@
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struct pt_regs;
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asmlinkage int sys_fork(unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs __regs);
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asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
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unsigned long parent_tidptr,
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unsigned long child_tidptr,
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struct pt_regs __regs);
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asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs __regs);
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asmlinkage int sys_sigsuspend(old_sigset_t mask);
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asmlinkage int sys_sigaction(int sig, const struct old_sigaction __user *act,
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struct old_sigaction __user *oact);
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@ -9,19 +9,6 @@
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struct pt_regs;
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asmlinkage int sys_fork(unsigned long r2, unsigned long r3,
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unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs *pregs);
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asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
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unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs *pregs);
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asmlinkage int sys_vfork(unsigned long r2, unsigned long r3,
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unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs *pregs);
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/* Misc syscall related bits */
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asmlinkage long long do_syscall_trace_enter(struct pt_regs *regs);
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asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
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@ -29,6 +29,9 @@
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# define __ARCH_WANT_SYS_SIGPROCMASK
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# define __ARCH_WANT_SYS_RT_SIGACTION
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# define __ARCH_WANT_SYS_EXECVE
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# define __ARCH_WANT_SYS_FORK
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# define __ARCH_WANT_SYS_VFORK
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# define __ARCH_WANT_SYS_CLONE
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/*
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* "Conditional" syscalls
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@ -129,7 +129,7 @@ asmlinkage void ret_from_kernel_thread(void);
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int copy_thread(unsigned long clone_flags, unsigned long usp,
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unsigned long arg,
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struct task_struct *p, struct pt_regs *regs)
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struct task_struct *p, struct pt_regs *unused)
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{
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struct thread_info *ti = task_thread_info(p);
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struct pt_regs *childregs;
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@ -164,9 +164,10 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
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p->fpu_counter = 0;
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return 0;
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}
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*childregs = *regs;
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*childregs = *current_pt_regs();
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childregs->regs[15] = usp;
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if (usp)
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childregs->regs[15] = usp;
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ti->addr_limit = USER_DS;
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if (clone_flags & CLONE_SETTLS)
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@ -217,51 +218,6 @@ __switch_to(struct task_struct *prev, struct task_struct *next)
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return prev;
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}
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asmlinkage int sys_fork(unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs __regs)
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{
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#ifdef CONFIG_MMU
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struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
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return do_fork(SIGCHLD, regs->regs[15], regs, 0, NULL, NULL);
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#else
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/* fork almost works, enough to trick you into looking elsewhere :-( */
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return -EINVAL;
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#endif
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}
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asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
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unsigned long parent_tidptr,
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unsigned long child_tidptr,
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struct pt_regs __regs)
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{
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struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
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if (!newsp)
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newsp = regs->regs[15];
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return do_fork(clone_flags, newsp, regs, 0,
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(int __user *)parent_tidptr,
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(int __user *)child_tidptr);
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}
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/*
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* This is trivial, and on the face of it looks like it
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* could equally well be done in user mode.
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*
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* Not so, for quite unobvious reasons - register pressure.
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* In user mode vfork() cannot have a stack frame, and if
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* done by calling the "clone()" system call directly, you
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* do not have enough call-clobbered registers to hold all
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* the information you need.
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*/
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asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs __regs)
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{
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struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
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return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->regs[15], regs,
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0, NULL, NULL);
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}
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unsigned long get_wchan(struct task_struct *p)
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{
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unsigned long pc;
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@ -383,7 +383,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
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save_fpu(current);
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disable_fpu();
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last_task_used_math = NULL;
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regs->sr |= SR_FD;
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current_pt_regs()->sr |= SR_FD;
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}
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#endif
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/* Copy from sh version */
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@ -399,7 +399,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
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p->thread.pc = (unsigned long) ret_from_kernel_thread;
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return 0;
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}
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*childregs = *regs;
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*childregs = *current_pt_regs();
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/*
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* Sign extend the edited stack.
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@ -407,7 +407,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
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* 32-bit wide and context switch must take care
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* of NEFF sign extension.
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*/
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childregs->regs[15] = neff_sign_extend(usp);
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if (usp)
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childregs->regs[15] = neff_sign_extend(usp);
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p->thread.uregs = childregs;
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childregs->regs[9] = 0; /* Set return value for child */
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@ -418,42 +419,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
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return 0;
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}
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asmlinkage int sys_fork(unsigned long r2, unsigned long r3,
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unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs *pregs)
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{
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return do_fork(SIGCHLD, pregs->regs[15], pregs, 0, 0, 0);
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}
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asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
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unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs *pregs)
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{
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if (!newsp)
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newsp = pregs->regs[15];
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return do_fork(clone_flags, newsp, pregs, 0, 0, 0);
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}
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/*
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* This is trivial, and on the face of it looks like it
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* could equally well be done in user mode.
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*
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* Not so, for quite unobvious reasons - register pressure.
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* In user mode vfork() cannot have a stack frame, and if
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* done by calling the "clone()" system call directly, you
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* do not have enough call-clobbered registers to hold all
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* the information you need.
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*/
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asmlinkage int sys_vfork(unsigned long r2, unsigned long r3,
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unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs *pregs)
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{
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return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, pregs->regs[15], pregs, 0, 0, 0);
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}
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#ifdef CONFIG_FRAME_POINTER
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static int in_sh64_switch_to(unsigned long pc)
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{
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