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nexedi
linux
Commits
44f4b56b
Commit
44f4b56b
authored
May 31, 2012
by
Al Viro
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alpha: introduce ret_from_kernel_execve(), switch to generic kernel_execve()
Signed-off-by:
Al Viro
<
viro@zeniv.linux.org.uk
>
parent
cba1ec7e
Changes
3
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3 changed files
with
14 additions
and
19 deletions
+14
-19
arch/alpha/include/asm/unistd.h
arch/alpha/include/asm/unistd.h
+1
-0
arch/alpha/kernel/entry.S
arch/alpha/kernel/entry.S
+13
-0
arch/alpha/kernel/process.c
arch/alpha/kernel/process.c
+0
-19
No files found.
arch/alpha/include/asm/unistd.h
View file @
44f4b56b
...
@@ -482,6 +482,7 @@
...
@@ -482,6 +482,7 @@
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_KERNEL_EXECVE
/* "Conditional" syscalls. What we want is
/* "Conditional" syscalls. What we want is
...
...
arch/alpha/kernel/entry.S
View file @
44f4b56b
...
@@ -626,6 +626,19 @@ ret_from_kernel_thread:
...
@@ -626,6 +626,19 @@ ret_from_kernel_thread:
jmp
$
31
,
sys_exit
jmp
$
31
,
sys_exit
.
end
ret_from_kernel_thread
.
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
/*
/*
*
Special
system
calls
.
Most
of
these
are
special
in
that
they
either
*
Special
system
calls
.
Most
of
these
are
special
in
that
they
either
...
...
arch/alpha/kernel/process.c
View file @
44f4b56b
...
@@ -435,22 +435,3 @@ get_wchan(struct task_struct *p)
...
@@ -435,22 +435,3 @@ get_wchan(struct task_struct *p)
}
}
return
pc
;
return
pc
;
}
}
int
kernel_execve
(
const
char
*
path
,
const
char
*
const
argv
[],
const
char
*
const
envp
[])
{
/* Avoid the HAE being gratuitously wrong, which would cause us
to do the whole turn off interrupts thing and restore it. */
struct
pt_regs
regs
=
{.
hae
=
alpha_mv
.
hae_cache
};
int
err
=
do_execve
(
path
,
argv
,
envp
,
&
regs
);
if
(
!
err
)
{
struct
pt_regs
*
p
=
current_pt_regs
();
/* copy regs to normal position and off to userland we go... */
*
p
=
regs
;
__asm__
__volatile__
(
"mov %0, $sp;"
"br $31, ret_from_sys_call"
:
:
"r"
(
p
));
}
return
err
;
}
EXPORT_SYMBOL
(
kernel_execve
);
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