runtime: size arena to fit in virtual address space limit
For Brad.
Now FreeBSD/386 binaries run on nearlyfreespeech.net.
Fixes #2302.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5700060
diff --git a/src/pkg/runtime/sys_linux_arm.s b/src/pkg/runtime/sys_linux_arm.s
index 26101d7..439df3a 100644
--- a/src/pkg/runtime/sys_linux_arm.s
+++ b/src/pkg/runtime/sys_linux_arm.s
@@ -33,6 +33,7 @@
#define SYS_tkill (SYS_BASE + 238)
#define SYS_sched_yield (SYS_BASE + 158)
#define SYS_select (SYS_BASE + 142) // newselect
+#define SYS_ugetrlimit (SYS_BASE + 191)
#define ARM_BASE (SYS_BASE + 0x0f0000)
#define SYS_ARM_cacheflush (ARM_BASE + 2)
@@ -72,6 +73,13 @@
SWI $0
RET
+TEXT runtime·getrlimit(SB),7,$0
+ MOVW 0(FP), R0
+ MOVW 4(FP), R1
+ MOVW $SYS_ugetrlimit, R7
+ SWI $0
+ RET
+
TEXT runtime·exit(SB),7,$-4
MOVW 0(FP), R0
MOVW $SYS_exit_group, R7
