openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[PATCH] uml: change sigjmp_buf to jmp_buf 

Clean up the jmpbuf code.  Since softints, we no longer use sig_setjmp, so
the UML_SIGSETJMP wrapper now has a misleading name.  Also, I forgot to
change the buffers from sigjmp_buf to jmp_buf.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike 2006-04-18 22:21:41 -07:00 committed by Linus Torvalds
parent 4127272c38
commit ad28e02978
6 changed files with 27 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/um/include/longjmp.h
View File

@ -4,11 +4,11 @@
#include <setjmp.h>
#include "os.h"
#define UML_SIGLONGJMP(buf, val) do { \
#define UML_LONGJMP(buf, val) do { \
longjmp(*buf, val); \
} while(0)
#define UML_SIGSETJMP(buf, enable) ({ \
#define UML_SETJMP(buf, enable) ({ \
int n; \
enable = get_signals(); \
n = setjmp(*buf); \

4
arch/um/os-Linux/process.c
View File

@ -266,11 +266,11 @@ void init_new_thread_signals(int altstack)
int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr)
{
sigjmp_buf buf;
jmp_buf buf;
int n, enable;
*jmp_ptr = &buf;
n = UML_SIGSETJMP(&buf, enable);
n = UML_SETJMP(&buf, enable);
if(n != 0)
return(n);
(*fn)(arg);

36
arch/um/os-Linux/skas/process.c
View File

@ -434,7 +434,7 @@ void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
void (*handler)(int))
{
unsigned long flags;
sigjmp_buf switch_buf, fork_buf;
jmp_buf switch_buf, fork_buf;
int enable;
*switch_buf_ptr = &switch_buf;
@ -450,7 +450,7 @@ void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
*/
flags = get_signals();
block_signals();
if(UML_SIGSETJMP(&fork_buf, enable) == 0)
if(UML_SETJMP(&fork_buf, enable) == 0)
new_thread_proc(stack, handler);
remove_sigstack();
@ -466,35 +466,35 @@ void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
void thread_wait(void *sw, void *fb)
{
sigjmp_buf buf, **switch_buf = sw, *fork_buf;
jmp_buf buf, **switch_buf = sw, *fork_buf;
int enable;
*switch_buf = &buf;
fork_buf = fb;
if(UML_SIGSETJMP(&buf, enable) == 0)
if(UML_SETJMP(&buf, enable) == 0)
siglongjmp(*fork_buf, INIT_JMP_REMOVE_SIGSTACK);
}
void switch_threads(void *me, void *next)
{
sigjmp_buf my_buf, **me_ptr = me, *next_buf = next;
jmp_buf my_buf, **me_ptr = me, *next_buf = next;
int enable;
*me_ptr = &my_buf;
if(UML_SIGSETJMP(&my_buf, enable) == 0)
UML_SIGLONGJMP(next_buf, 1);
if(UML_SETJMP(&my_buf, enable) == 0)
UML_LONGJMP(next_buf, 1);
}
static sigjmp_buf initial_jmpbuf;
static jmp_buf initial_jmpbuf;
/* XXX Make these percpu */
static void (*cb_proc)(void *arg);
static void *cb_arg;
static sigjmp_buf *cb_back;
static jmp_buf *cb_back;
int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr)
{
sigjmp_buf **switch_buf = switch_buf_ptr;
jmp_buf **switch_buf = switch_buf_ptr;
int n, enable;
set_handler(SIGWINCH, (__sighandler_t) sig_handler,
@ -502,7 +502,7 @@ int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr)
SIGVTALRM, -1);
*fork_buf_ptr = &initial_jmpbuf;
n = UML_SIGSETJMP(&initial_jmpbuf, enable);
n = UML_SETJMP(&initial_jmpbuf, enable);
switch(n){
case INIT_JMP_NEW_THREAD:
new_thread_proc((void *) stack, new_thread_handler);
@ -512,7 +512,7 @@ int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr)
break;
case INIT_JMP_CALLBACK:
(*cb_proc)(cb_arg);
UML_SIGLONGJMP(cb_back, 1);
UML_LONGJMP(cb_back, 1);
break;
case INIT_JMP_HALT:
kmalloc_ok = 0;
@ -523,12 +523,12 @@ int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr)
default:
panic("Bad sigsetjmp return in start_idle_thread - %d\n", n);
}
UML_SIGLONGJMP(*switch_buf, 1);
UML_LONGJMP(*switch_buf, 1);
}
void initial_thread_cb_skas(void (*proc)(void *), void *arg)
{
sigjmp_buf here;
jmp_buf here;
int enable;
cb_proc = proc;
@ -536,8 +536,8 @@ void initial_thread_cb_skas(void (*proc)(void *), void *arg)
cb_back = &here;
block_signals();
if(UML_SIGSETJMP(&here, enable) == 0)
UML_SIGLONGJMP(&initial_jmpbuf, INIT_JMP_CALLBACK);
if(UML_SETJMP(&here, enable) == 0)
UML_LONGJMP(&initial_jmpbuf, INIT_JMP_CALLBACK);
unblock_signals();
cb_proc = NULL;
@ -548,13 +548,13 @@ void initial_thread_cb_skas(void (*proc)(void *), void *arg)
void halt_skas(void)
{
block_signals();
UML_SIGLONGJMP(&initial_jmpbuf, INIT_JMP_HALT);
UML_LONGJMP(&initial_jmpbuf, INIT_JMP_HALT);
}
void reboot_skas(void)
{
block_signals();
UML_SIGLONGJMP(&initial_jmpbuf, INIT_JMP_REBOOT);
UML_LONGJMP(&initial_jmpbuf, INIT_JMP_REBOOT);
}
void switch_mm_skas(struct mm_id *mm_idp)

4
arch/um/os-Linux/trap.c
View File

@ -35,7 +35,7 @@ void os_fill_handlinfo(struct kern_handlers h)
void do_longjmp(void *b, int val)
{
sigjmp_buf *buf = b;
jmp_buf *buf = b;
UML_SIGLONGJMP(buf, val);
UML_LONGJMP(buf, val);
}

4
arch/um/os-Linux/uaccess.c
View File

@ -16,9 +16,9 @@ unsigned long __do_user_copy(void *to, const void *from, int n,
unsigned long *faddrp = (unsigned long *) fault_addr, ret;
int enable;
sigjmp_buf jbuf;
jmp_buf jbuf;
*fault_catcher = &jbuf;
if(UML_SIGSETJMP(&jbuf, enable) == 0){
if(UML_SETJMP(&jbuf, enable) == 0){
(*op)(to, from, n);
ret = 0;
*faulted_out = 0;

2
arch/um/os-Linux/util.c
View File

@ -104,7 +104,7 @@ void setup_hostinfo(void)
int setjmp_wrapper(void (*proc)(void *, void *), ...)
{
va_list args;
sigjmp_buf buf;
jmp_buf buf;
int n;
n = sigsetjmp(buf, 1);