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0ad9513d
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0ad9513d
编写于
10月 27, 2012
作者:
A
Al Viro
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
sh: switch to generic fork/vfork/clone
Signed-off-by:
N
Al Viro
<
viro@zeniv.linux.org.uk
>
上级
415bfae9
变更
5
隐藏空白更改
内联
并排
Showing
5 changed file
with
11 addition
and
110 deletion
+11
-110
arch/sh/include/asm/syscalls_32.h
arch/sh/include/asm/syscalls_32.h
+0
-10
arch/sh/include/asm/syscalls_64.h
arch/sh/include/asm/syscalls_64.h
+0
-13
arch/sh/include/asm/unistd.h
arch/sh/include/asm/unistd.h
+3
-0
arch/sh/kernel/process_32.c
arch/sh/kernel/process_32.c
+4
-48
arch/sh/kernel/process_64.c
arch/sh/kernel/process_64.c
+4
-39
未找到文件。
arch/sh/include/asm/syscalls_32.h
浏览文件 @
0ad9513d
...
...
@@ -9,16 +9,6 @@
struct
pt_regs
;
asmlinkage
int
sys_fork
(
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
__regs
);
asmlinkage
int
sys_clone
(
unsigned
long
clone_flags
,
unsigned
long
newsp
,
unsigned
long
parent_tidptr
,
unsigned
long
child_tidptr
,
struct
pt_regs
__regs
);
asmlinkage
int
sys_vfork
(
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
__regs
);
asmlinkage
int
sys_sigsuspend
(
old_sigset_t
mask
);
asmlinkage
int
sys_sigaction
(
int
sig
,
const
struct
old_sigaction
__user
*
act
,
struct
old_sigaction
__user
*
oact
);
...
...
arch/sh/include/asm/syscalls_64.h
浏览文件 @
0ad9513d
...
...
@@ -9,19 +9,6 @@
struct
pt_regs
;
asmlinkage
int
sys_fork
(
unsigned
long
r2
,
unsigned
long
r3
,
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
*
pregs
);
asmlinkage
int
sys_clone
(
unsigned
long
clone_flags
,
unsigned
long
newsp
,
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
*
pregs
);
asmlinkage
int
sys_vfork
(
unsigned
long
r2
,
unsigned
long
r3
,
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
*
pregs
);
/* Misc syscall related bits */
asmlinkage
long
long
do_syscall_trace_enter
(
struct
pt_regs
*
regs
);
asmlinkage
void
do_syscall_trace_leave
(
struct
pt_regs
*
regs
);
...
...
arch/sh/include/asm/unistd.h
浏览文件 @
0ad9513d
...
...
@@ -29,6 +29,9 @@
# define __ARCH_WANT_SYS_SIGPROCMASK
# define __ARCH_WANT_SYS_RT_SIGACTION
# define __ARCH_WANT_SYS_EXECVE
# define __ARCH_WANT_SYS_FORK
# define __ARCH_WANT_SYS_VFORK
# define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
...
...
arch/sh/kernel/process_32.c
浏览文件 @
0ad9513d
...
...
@@ -129,7 +129,7 @@ asmlinkage void ret_from_kernel_thread(void);
int
copy_thread
(
unsigned
long
clone_flags
,
unsigned
long
usp
,
unsigned
long
arg
,
struct
task_struct
*
p
,
struct
pt_regs
*
regs
)
struct
task_struct
*
p
,
struct
pt_regs
*
unused
)
{
struct
thread_info
*
ti
=
task_thread_info
(
p
);
struct
pt_regs
*
childregs
;
...
...
@@ -164,9 +164,10 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
p
->
fpu_counter
=
0
;
return
0
;
}
*
childregs
=
*
regs
;
*
childregs
=
*
current_pt_regs
()
;
childregs
->
regs
[
15
]
=
usp
;
if
(
usp
)
childregs
->
regs
[
15
]
=
usp
;
ti
->
addr_limit
=
USER_DS
;
if
(
clone_flags
&
CLONE_SETTLS
)
...
...
@@ -217,51 +218,6 @@ __switch_to(struct task_struct *prev, struct task_struct *next)
return
prev
;
}
asmlinkage
int
sys_fork
(
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
__regs
)
{
#ifdef CONFIG_MMU
struct
pt_regs
*
regs
=
RELOC_HIDE
(
&
__regs
,
0
);
return
do_fork
(
SIGCHLD
,
regs
->
regs
[
15
],
regs
,
0
,
NULL
,
NULL
);
#else
/* fork almost works, enough to trick you into looking elsewhere :-( */
return
-
EINVAL
;
#endif
}
asmlinkage
int
sys_clone
(
unsigned
long
clone_flags
,
unsigned
long
newsp
,
unsigned
long
parent_tidptr
,
unsigned
long
child_tidptr
,
struct
pt_regs
__regs
)
{
struct
pt_regs
*
regs
=
RELOC_HIDE
(
&
__regs
,
0
);
if
(
!
newsp
)
newsp
=
regs
->
regs
[
15
];
return
do_fork
(
clone_flags
,
newsp
,
regs
,
0
,
(
int
__user
*
)
parent_tidptr
,
(
int
__user
*
)
child_tidptr
);
}
/*
* This is trivial, and on the face of it looks like it
* could equally well be done in user mode.
*
* Not so, for quite unobvious reasons - register pressure.
* In user mode vfork() cannot have a stack frame, and if
* done by calling the "clone()" system call directly, you
* do not have enough call-clobbered registers to hold all
* the information you need.
*/
asmlinkage
int
sys_vfork
(
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
__regs
)
{
struct
pt_regs
*
regs
=
RELOC_HIDE
(
&
__regs
,
0
);
return
do_fork
(
CLONE_VFORK
|
CLONE_VM
|
SIGCHLD
,
regs
->
regs
[
15
],
regs
,
0
,
NULL
,
NULL
);
}
unsigned
long
get_wchan
(
struct
task_struct
*
p
)
{
unsigned
long
pc
;
...
...
arch/sh/kernel/process_64.c
浏览文件 @
0ad9513d
...
...
@@ -383,7 +383,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
save_fpu
(
current
);
disable_fpu
();
last_task_used_math
=
NULL
;
regs
->
sr
|=
SR_FD
;
current_pt_regs
()
->
sr
|=
SR_FD
;
}
#endif
/* Copy from sh version */
...
...
@@ -399,7 +399,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
p
->
thread
.
pc
=
(
unsigned
long
)
ret_from_kernel_thread
;
return
0
;
}
*
childregs
=
*
regs
;
*
childregs
=
*
current_pt_regs
()
;
/*
* Sign extend the edited stack.
...
...
@@ -407,7 +407,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
* 32-bit wide and context switch must take care
* of NEFF sign extension.
*/
childregs
->
regs
[
15
]
=
neff_sign_extend
(
usp
);
if
(
usp
)
childregs
->
regs
[
15
]
=
neff_sign_extend
(
usp
);
p
->
thread
.
uregs
=
childregs
;
childregs
->
regs
[
9
]
=
0
;
/* Set return value for child */
...
...
@@ -418,42 +419,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
return
0
;
}
asmlinkage
int
sys_fork
(
unsigned
long
r2
,
unsigned
long
r3
,
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
*
pregs
)
{
return
do_fork
(
SIGCHLD
,
pregs
->
regs
[
15
],
pregs
,
0
,
0
,
0
);
}
asmlinkage
int
sys_clone
(
unsigned
long
clone_flags
,
unsigned
long
newsp
,
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
*
pregs
)
{
if
(
!
newsp
)
newsp
=
pregs
->
regs
[
15
];
return
do_fork
(
clone_flags
,
newsp
,
pregs
,
0
,
0
,
0
);
}
/*
* This is trivial, and on the face of it looks like it
* could equally well be done in user mode.
*
* Not so, for quite unobvious reasons - register pressure.
* In user mode vfork() cannot have a stack frame, and if
* done by calling the "clone()" system call directly, you
* do not have enough call-clobbered registers to hold all
* the information you need.
*/
asmlinkage
int
sys_vfork
(
unsigned
long
r2
,
unsigned
long
r3
,
unsigned
long
r4
,
unsigned
long
r5
,
unsigned
long
r6
,
unsigned
long
r7
,
struct
pt_regs
*
pregs
)
{
return
do_fork
(
CLONE_VFORK
|
CLONE_VM
|
SIGCHLD
,
pregs
->
regs
[
15
],
pregs
,
0
,
0
,
0
);
}
#ifdef CONFIG_FRAME_POINTER
static
int
in_sh64_switch_to
(
unsigned
long
pc
)
{
...
...
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