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runtime: check error codes for arm64 system calls

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Unlike linux arm32, linux arm64 does not set the condition codes to indicate
whether a system call failed or not.  We must check if the return value
is in the error code range (the same as amd64 does).

Fixes runtime.TestBadOpen test.

Change-Id: I97a8b0a17b5f002a3215c535efa91d199cee3309
Reviewed-on: https://go-review.googlesource.com/9220
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
Keith Randall 2015-04-21 15:47:58 -07:00
parent a76099f0d9
commit 3a56aa0d3e
1 changed files with 3 additions and 0 deletions
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3
src/runtime/sys_linux_arm64.s
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@ -72,6 +72,7 @@ TEXT runtime·closefd(SB),NOSPLIT,$-8-12
MOVW fd+0(FP), R0
MOVD $SYS_close, R8
SVC
CMN $4095, R0
BCC done
MOVW $-1, R0
done:
@ -84,6 +85,7 @@ TEXT runtime·write(SB),NOSPLIT,$-8-28
MOVW n+16(FP), R2
MOVD $SYS_write, R8
SVC
CMN $4095, R0
BCC done
MOVW $-1, R0
done:
@ -96,6 +98,7 @@ TEXT runtime·read(SB),NOSPLIT,$-8-28
MOVW n+16(FP), R2
MOVD $SYS_read, R8
SVC
CMN $4095, R0
BCC done
MOVW $-1, R0
done: