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Implement savectx().

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Obtained from:	NetBSD
This commit is contained in:
Olivier Houchard 2005-10-03 14:05:38 +00:00
parent f7a1a1e2e5
commit 6d918e02d0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=150856
1 changed files with 15 additions and 0 deletions
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15
sys/arm/arm/swtch.S
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@ -450,7 +450,22 @@ ENTRY(cpu_switch)
.asciz "cpu_switch: sched_qs empty with non-zero sched_whichqs!\n"
#endif
ENTRY(savectx)
stmfd sp!, {r4-r7, lr}
/*
* r0 = pcb
*/
/* Store all the registers in the process's pcb */
#ifndef __XSCALE__
add r2, r0, #(PCB_R8)
stmia r2, {r8-r13}
#else
strd r8, [r0, #(PCB_R8)]
strd r10, [r0, #(PCB_R10)]
strd r12, [r0, #(PCB_R12)]
#endif
ldmfd sp!, {r4-r7, pc}
RET
ENTRY(fork_trampoline)
mov r1, r5
mov r2, sp