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alpha: switch to saner kernel_execve() semantics 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-10-10 23:12:01 -04:00
parent 9fff2fa0db
commit 5522be6a46
3 changed files with 2 additions and 17 deletions
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1
arch/alpha/Kconfig
View File

@ -21,6 +21,7 @@ config ALPHA
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select GENERIC_KERNEL_THREAD
select GENERIC_KERNEL_EXECVE
help
The Alpha is a 64-bit general-purpose processor designed and
marketed by the Digital Equipment Corporation of blessed memory,

1
arch/alpha/include/asm/unistd.h
View File

@ -482,7 +482,6 @@
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_KERNEL_EXECVE
/* "Conditional" syscalls. What we want is

17
arch/alpha/kernel/entry.S
View File

@ -603,24 +603,9 @@ ret_from_kernel_thread:
mov $9, $27
mov $10, $16
jsr $26, ($9)
ldgp $gp, 0($26)
mov $0, $16
mov $31, $26
jmp $31, sys_exit
.end ret_from_kernel_thread
.globl ret_from_kernel_execve
.align 4
.ent ret_from_kernel_execve
ret_from_kernel_execve:
mov $16, $sp
/* Avoid the HAE being gratuitously wrong, to avoid restoring it. */
ldq $2, alpha_mv+HAE_CACHE
stq $2, 152($sp) /* HAE */
mov $31, $19 /* to disable syscall restarts */
br $31, ret_to_user
.end ret_from_kernel_execve
.end ret_from_kernel_thread
/*