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arm

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This commit is contained in:
rsc 2005-11-01 18:35:44 +00:00
parent 48ca8d21f7
commit f51bf04878
4 changed files with 105 additions and 1 deletions
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53
src/libthread/Linux-arm-asm.s Normal file
View file

@ -0,0 +1,53 @@
.globl _tas
_tas:
mov r3, #0xCA000000
add r3, r3, #0xFE0000
add r3, r3, #0xBA00
add r3, r3, #0xBE
swp r3, r3, [r0]
mov r0, r3
mov pc, lr
.globl getmcontext
getmcontext:
/* r0 will be overwritten */
str r1, [r0,#4]!
str r2, [r0,#4]!
str r3, [r0,#4]!
str r4, [r0,#4]!
str r5, [r0,#4]!
str r6, [r0,#4]!
str r7, [r0,#4]!
str r8, [r0,#4]!
str r9, [r0,#4]!
str r10, [r0,#4]!
str r11, [r0,#4]!
str r12, [r0,#4]!
str r13, [r0,#4]!
str r14, [r0,#4]!
/* r15 is pc */
mov r0, #0
mov pc, lr
.globl setmcontext
setmcontext:
/* r0 will be overwritten */
ldr r1, [r0,#4]!
ldr r2, [r0,#4]!
ldr r3, [r0,#4]!
ldr r4, [r0,#4]!
ldr r5, [r0,#4]!
ldr r6, [r0,#4]!
ldr r7, [r0,#4]!
ldr r8, [r0,#4]!
ldr r9, [r0,#4]!
ldr r10, [r0,#4]!
ldr r11, [r0,#4]!
ldr r12, [r0,#4]!
ldr r13, [r0,#4]!
ldr r14, [r0,#4]!
/* r15 is pc */
mov r0, #1
mov pc, lr

40
src/libthread/Linux.c
View file

@ -436,3 +436,43 @@ _threadpexit(void)
_exit(0);
}
#ifdef __arm__
extern int getmcontext(mcontext_t*);
extern int setmcontext(const mcontext_t*);
void
makecontext(ucontext_t *uc, void (*fn)(void), int argc, ...)
{
int i, *sp;
va_list arg;
sp = (int*)uc->uc_stack.ss_sp+uc->uc_stack.ss_size/4;
va_start(arg, argc);
for(i=0; i<4 && i<argc; i++)
uc->uc_mcontext.gregs[0] = va_arg(arg, uint);
uc->uc_mcontext.gregs[13] = (uint)sp;
uc->uc_mcontext.gregs[14] = (uint)fn;
}
int
getcontext(ucontext_t *uc)
{
return getmcontext(&uc->uc_mcontext);
}
int
setcontext(const ucontext_t *uc)
{
setmcontext(&uc->uc_mcontext);
return 0; /* not reached */
}
int
swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
{
if(getcontext(oucp) == 0)
setcontext(ucp);
return 0;
}
#endif