alpha: switch to generic fork/vfork/clone
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -482,6 +482,9 @@
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#define __ARCH_WANT_SYS_SIGPENDING
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#define __ARCH_WANT_SYS_RT_SIGSUSPEND
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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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/* "Conditional" syscalls. What we want is
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@ -612,44 +612,24 @@ ret_from_kernel_thread:
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* Special system calls. Most of these are special in that they either
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* have to play switch_stack games or in some way use the pt_regs struct.
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*/
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.macro fork_like name
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.align 4
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.globl sys_fork
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.ent sys_fork
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sys_fork:
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.globl alpha_\name
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.ent alpha_\name
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alpha_\name:
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.prologue 0
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bsr $1, do_switch_stack
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bis $31, SIGCHLD, $16
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mov $31, $17
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mov $31, $18
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mov $31, $19
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mov $31, $20
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jsr $26, alpha_clone
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fork_out:
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jsr $26, sys_\name
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ldq $26, 56($sp)
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lda $sp, SWITCH_STACK_SIZE($sp)
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ret
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.end sys_fork
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.end alpha_\name
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.endm
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.align 4
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.globl sys_clone
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.ent sys_clone
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sys_clone:
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.prologue 0
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bsr $1, do_switch_stack
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/* $16, $17, $18, $19, $20 come from the user. */
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lda $26, fork_out
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jsr $31, alpha_clone
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.end sys_clone
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.align 4
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.globl sys_vfork
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.ent sys_vfork
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sys_vfork:
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.prologue 0
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bsr $1, do_switch_stack
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lda $26, fork_out
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jsr $31, alpha_vfork
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.end sys_vfork
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fork_like fork
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fork_like vfork
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fork_like clone
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.align 4
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.globl sys_sigreturn
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@ -234,31 +234,6 @@ release_thread(struct task_struct *dead_task)
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{
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}
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/*
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* "alpha_clone()".. By the time we get here, the
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* non-volatile registers have also been saved on the
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* stack. We do some ugly pointer stuff here.. (see
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* also copy_thread)
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*
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* Notice that "fork()" is implemented in terms of clone,
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* with parameters (SIGCHLD, 0).
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*/
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int
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alpha_clone(unsigned long clone_flags, unsigned long usp,
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int __user *parent_tid, int __user *child_tid,
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unsigned long tls_value)
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{
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return do_fork(clone_flags, usp, current_pt_regs(), 0,
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parent_tid, child_tid);
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}
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int
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alpha_vfork(void)
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{
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return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0,
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current_pt_regs(), 0, NULL, NULL);
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}
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/*
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* Copy an alpha thread..
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*/
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@ -12,7 +12,7 @@
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sys_call_table:
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.quad alpha_ni_syscall /* 0 */
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.quad sys_exit
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.quad sys_fork
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.quad alpha_fork
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.quad sys_read
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.quad sys_write
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.quad alpha_ni_syscall /* 5 */
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@ -76,7 +76,7 @@ sys_call_table:
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.quad sys_getpgrp
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.quad sys_getpagesize
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.quad alpha_ni_syscall /* 65 */
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.quad sys_vfork
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.quad alpha_vfork
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.quad sys_newstat
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.quad sys_newlstat
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.quad alpha_ni_syscall
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@ -330,7 +330,7 @@ sys_call_table:
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.quad sys_ni_syscall /* 309: old get_kernel_syms */
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.quad sys_syslog /* 310 */
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.quad sys_reboot
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.quad sys_clone
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.quad alpha_clone
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.quad sys_uselib
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.quad sys_mlock
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.quad sys_munlock /* 315 */
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