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yaml
---
r: 1081
b: refs/heads/master
c: 675dffc
h: refs/heads/master
i:
  1079: 9eaa862
v: v3
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Jeff Dike authored and Linus Torvalds committed May 7, 2005
1 parent acc34ca commit 2ece35a
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Showing 2 changed files with 23 additions and 14 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 37f02b63bdc55147a32cedf7831452efd5a72748
refs/heads/master: 675dffc914412a25d33bbc8baea30681c565c9c1
35 changes: 22 additions & 13 deletions trunk/arch/um/kernel/skas/process.c
Original file line number Diff line number Diff line change
Expand Up @@ -201,6 +201,11 @@ void userspace(union uml_pt_regs *regs)
}
}
}
#define INIT_JMP_NEW_THREAD 0
#define INIT_JMP_REMOVE_SIGSTACK 1
#define INIT_JMP_CALLBACK 2
#define INIT_JMP_HALT 3
#define INIT_JMP_REBOOT 4

void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
void (*handler)(int))
Expand Down Expand Up @@ -236,7 +241,7 @@ void thread_wait(void *sw, void *fb)
*switch_buf = &buf;
fork_buf = fb;
if(sigsetjmp(buf, 1) == 0)
siglongjmp(*fork_buf, 1);
siglongjmp(*fork_buf, INIT_JMP_REMOVE_SIGSTACK);
}

void switch_threads(void *me, void *next)
Expand Down Expand Up @@ -266,21 +271,25 @@ int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr)

*fork_buf_ptr = &initial_jmpbuf;
n = sigsetjmp(initial_jmpbuf, 1);
if(n == 0)
new_thread_proc((void *) stack, new_thread_handler);
else if(n == 1)
remove_sigstack();
else if(n == 2){
switch(n){
case INIT_JMP_NEW_THREAD:
new_thread_proc((void *) stack, new_thread_handler);
break;
case INIT_JMP_REMOVE_SIGSTACK:
remove_sigstack();
break;
case INIT_JMP_CALLBACK:
(*cb_proc)(cb_arg);
siglongjmp(*cb_back, 1);
}
else if(n == 3){
break;
case INIT_JMP_HALT:
kmalloc_ok = 0;
return(0);
}
else if(n == 4){
case INIT_JMP_REBOOT:
kmalloc_ok = 0;
return(1);
default:
panic("Bad sigsetjmp return in start_idle_thread - %d\n", n);
}
siglongjmp(**switch_buf, 1);
}
Expand All @@ -305,7 +314,7 @@ void initial_thread_cb_skas(void (*proc)(void *), void *arg)

block_signals();
if(sigsetjmp(here, 1) == 0)
siglongjmp(initial_jmpbuf, 2);
siglongjmp(initial_jmpbuf, INIT_JMP_CALLBACK);
unblock_signals();

cb_proc = NULL;
Expand All @@ -316,13 +325,13 @@ void initial_thread_cb_skas(void (*proc)(void *), void *arg)
void halt_skas(void)
{
block_signals();
siglongjmp(initial_jmpbuf, 3);
siglongjmp(initial_jmpbuf, INIT_JMP_HALT);
}

void reboot_skas(void)
{
block_signals();
siglongjmp(initial_jmpbuf, 4);
siglongjmp(initial_jmpbuf, INIT_JMP_REBOOT);
}

void switch_mm_skas(int mm_fd)
Expand Down

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