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parisc: switch to saner kernel_execve() semantics

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ACKed-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-10-11 17:22:16 -04:00
parent ff0ab8af9c
commit 363806ddd2
3 changed files with 4 additions and 20 deletions
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1
arch/parisc/Kconfig
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@ -23,6 +23,7 @@ config PARISC
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
select GENERIC_KERNEL_THREAD
select GENERIC_KERNEL_EXECVE
help
The PA-RISC microprocessor is designed by Hewlett-Packard and used

1
arch/parisc/include/asm/unistd.h
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@ -995,7 +995,6 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_KERNEL_EXECVE
#define __ARCH_WANT_SYS_EXECVE
#endif /* __ASSEMBLY__ */

22
arch/parisc/kernel/entry.S
View File

@ -727,26 +727,10 @@ ENTRY(ret_from_kernel_thread)
LDREG TASK_PT_GR26(%r1), %r1
ble 0(%sr7, %r1)
copy %r31, %r2
#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
loadgp /* Thread could have been in a module */
#endif
#ifndef CONFIG_64BIT
b sys_exit
#else
load32 sys_exit, %r1
bv %r0(%r1)
#endif
ldi 0, %r26
b finish_child_return
nop
ENDPROC(ret_from_kernel_thread)
ENTRY(ret_from_kernel_execve)
mfctl %cr30, %r1
b syscall_exit /* forward */
ldo THREAD_SZ_ALGN+FRAME_SIZE(%r1), %r30
ENDPROC(ret_from_kernel_execve)
/*
* struct task_struct *_switch_to(struct task_struct *prev,
@ -1721,7 +1705,7 @@ ENDPROC(sys_fork_wrapper)
ENTRY(child_return)
BL schedule_tail, %r2
nop
finish_child_return:
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
ldo TASK_REGS(%r1),%r1 /* get pt regs */