runtime: use m and g, instead of R9 and R10, in ARM assembly files
also don't clobber R9 if it is about to crash.
In response to https://golang.org/cl/9251043/#msg2.
R=golang-dev, khr, khr, dave
CC=golang-dev
https://golang.org/cl/9778046
diff --git a/src/pkg/runtime/sys_netbsd_arm.s b/src/pkg/runtime/sys_netbsd_arm.s
index 2f2052b..2d8c3d6 100644
--- a/src/pkg/runtime/sys_netbsd_arm.s
+++ b/src/pkg/runtime/sys_netbsd_arm.s
@@ -12,14 +12,14 @@
TEXT runtime·exit(SB),7,$-4
MOVW 0(FP), R0 // arg 1 exit status
SWI $0xa00001
- MOVW.CS $0, R9 // crash on syscall failure
- MOVW.CS R9, (R9)
+ MOVW.CS $0, R8 // crash on syscall failure
+ MOVW.CS R8, (R8)
RET
TEXT runtime·exit1(SB),7,$-4
SWI $0xa00136 // sys__lwp_exit
- MOVW $1, R9 // crash
- MOVW R9, (R9)
+ MOVW $1, R8 // crash
+ MOVW R8, (R8)
RET
TEXT runtime·open(SB),7,$-8
@@ -79,13 +79,13 @@
RET
TEXT runtime·lwp_tramp(SB),7,$0
- MOVW R0, R9 // m
- MOVW R1, R10 // g
+ MOVW R0, m
+ MOVW R1, g
BL runtime·emptyfunc(SB) // fault if stack check is wrong
BL (R2)
- MOVW $2, R9 // crash (not reached)
- MOVW R9, (R9)
+ MOVW $2, R8 // crash (not reached)
+ MOVW R8, (R8)
RET
TEXT runtime·usleep(SB),7,$16
@@ -160,8 +160,8 @@
TEXT runtime·getcontext(SB),7,$-4
MOVW 0(FP), R0 // arg 1 - context
SWI $0xa00133 // sys_getcontext
- MOVW.CS $0, R9 // crash on syscall failure
- MOVW.CS R9, (R9)
+ MOVW.CS $0, R8 // crash on syscall failure
+ MOVW.CS R8, (R8)
RET
TEXT runtime·sigprocmask(SB),7,$0
@@ -169,8 +169,8 @@
MOVW 4(FP), R1 // arg 2 - set
MOVW 8(FP), R2 // arg 3 - oset
SWI $0xa00125 // sys_sigprocmask
- MOVW.CS $0, R9 // crash on syscall failure
- MOVW.CS R9, (R9)
+ MOVW.CS $0, R8 // crash on syscall failure
+ MOVW.CS R8, (R8)
RET
TEXT runtime·sigreturn_tramp(SB),7,$-4
@@ -193,8 +193,8 @@
ADD $4, R13 // pass arg 5 on stack
SWI $0xa00154 // sys___sigaction_sigtramp
SUB $4, R13
- MOVW.CS $3, R9 // crash on syscall failure
- MOVW.CS R9, (R9)
+ MOVW.CS $3, R8 // crash on syscall failure
+ MOVW.CS R8, (R8)
RET
TEXT runtime·sigtramp(SB),7,$24
@@ -213,11 +213,11 @@
RET
// save g
- MOVW R10, R4
- MOVW R10, 20(R13)
+ MOVW g, R4
+ MOVW g, 20(R13)
// g = m->signal
- MOVW m_gsignal(R9), R10
+ MOVW m_gsignal(m), g
// R0 is already saved
MOVW R1, 8(R13) // info
@@ -230,7 +230,7 @@
BL runtime·sighandler(SB)
// restore g
- MOVW 20(R13), R10
+ MOVW 20(R13), g
RET
TEXT runtime·mmap(SB),7,$12
@@ -255,8 +255,8 @@
MOVW 0(FP), R0 // arg 1 - addr
MOVW 4(FP), R1 // arg 2 - len
SWI $0xa00049 // sys_munmap
- MOVW.CS $0, R9 // crash on syscall failure
- MOVW.CS R9, (R9)
+ MOVW.CS $0, R8 // crash on syscall failure
+ MOVW.CS R8, (R8)
RET
TEXT runtime·madvise(SB),7,$0
@@ -271,8 +271,8 @@
MOVW 0(FP), R0 // arg 1 - nss
MOVW 4(FP), R1 // arg 2 - oss
SWI $0xa00119 // sys___sigaltstack14
- MOVW.CS $0, R9 // crash on syscall failure
- MOVW.CS R9, (R9)
+ MOVW.CS $0, R8 // crash on syscall failure
+ MOVW.CS R8, (R8)
RET
TEXT runtime·sysctl(SB),7,$8
