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clone and futex

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go/test: passes 99% (343/347)

R=rsc
http://go/go-review/1016004
This commit is contained in:
Kai Backman 2009-10-29 21:21:14 -07:00
parent 09d68334cc
commit 770b872752
4 changed files with 104 additions and 12 deletions
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2
src/make-arm.bash
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@ -21,7 +21,7 @@ chmod +x $GOBIN/quietgcc
# TODO(kaib): converge with normal build
#for i in lib9 libbio libmach cmd pkg libcgo cmd/cgo cmd/ebnflint cmd/godoc cmd/gofmt
for i in lib9 libbio libmach cmd pkg cmd/cgo cmd/ebnflint cmd/godoc cmd/gofmt
for i in lib9 libbio libmach cmd pkg cmd/ebnflint cmd/godoc cmd/gofmt
do
# The ( ) here are to preserve the current directory
# for the next round despite the cd $i below.

14
src/pkg/runtime/arm/asm.s
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@ -55,20 +55,22 @@ TEXT _rt0_arm(SB),7,$-4
// start this M
BL mstart(SB)
MOVW $0, R0
SWI $0x00900001
MOVW $1234, R0
MOVW $1000, R1
MOVW R0, (R1) // fail hard
B _dep_dummy(SB) // Never reached
TEXT mainstart(SB),7,$0
TEXT mainstart(SB),7,$4
BL main·init(SB)
BL initdone(SB)
BL main·main(SB)
MOVW $0, R0
MOVW.W R0, -4(SP)
MOVW.W R14, -4(SP) // Push link as well
MOVW R0, 4(SP)
BL exit(SB)
MOVW $8(SP), SP // pop args and LR
MOVW $1234, R0
MOVW $1001, R1
MOVW R0, (R1) // fail hard
RET
// TODO(kaib): remove these once linker works properly

92
src/pkg/runtime/linux/arm/sys.s
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@ -6,10 +6,16 @@
// System calls and other sys.stuff for arm, Linux
//
#include "arm/asm.h"
#define SYS_BASE 0x00900000
#define SYS_exit (SYS_BASE + 1)
#define SYS_write (SYS_BASE + 4)
#define SYS_clone (SYS_BASE + 120)
#define SYS_mmap2 (SYS_BASE + 192)
#define SYS_gettid (SYS_BASE + 224)
#define SYS_futex (SYS_BASE + 240)
#define SYS_exit_group (SYS_BASE + 248)
TEXT write(SB),7,$0
MOVW 0(FP), R0
@ -19,8 +25,18 @@ TEXT write(SB),7,$0
RET
TEXT exit(SB),7,$-4
MOVW 0(FP), R0
SWI $SYS_exit_group
MOVW $1234, R0
MOVW $1002, R1
MOVW R0, (R1) // fail hard
TEXT exit1(SB),7,$-4
MOVW 0(FP), R0
SWI $SYS_exit
MOVW $1234, R0
MOVW $1003, R1
MOVW R0, (R1) // fail hard
TEXT runtime·mmap(SB),7,$0
MOVW 0(FP), R0
@ -32,13 +48,79 @@ TEXT runtime·mmap(SB),7,$0
SWI $SYS_mmap2
RET
// int64 futex(int32 *uaddr, int32 op, int32 val,
// int32 futex(int32 *uaddr, int32 op, int32 val,
// struct timespec *timeout, int32 *uaddr2, int32 val2);
TEXT futex(SB),7,$0
BL abort(SB)
MOVW 4(SP), R0
MOVW 8(SP), R1
MOVW 12(SP), R2
MOVW 16(SP), R3
MOVW 20(SP), R4
MOVW 24(SP), R5
SWI $SYS_futex
RET
// int64 clone(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
// int32 clone(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
TEXT clone(SB),7,$0
BL abort(SB)
RET
MOVW flags+0(FP), R0
MOVW stack+4(FP), R1
MOVW $0, R2 // parent tid ptr
MOVW $0, R3 // tls_val
MOVW $0, R4 // child tid ptr
MOVW $0, R5
// Copy m, g, fn off parent stack for use by child.
// TODO(kaib): figure out which registers are clobbered by clone and avoid stack copying
MOVW $-16(R1), R1
MOVW mm+8(FP), R6
MOVW R6, 0(R1)
MOVW gg+12(FP), R6
MOVW R6, 4(R1)
MOVW fn+16(FP), R6
MOVW R6, 8(R1)
MOVW $1234, R6
MOVW R6, 12(R1)
SWI $SYS_clone
// In parent, return.
CMP $0, R0
BEQ 2(PC)
RET
// Paranoia: check that SP is as we expect. Use R13 to avoid linker 'fixup'
MOVW 12(R13), R0
MOVW $1234, R1
CMP R0, R1
BEQ 2(PC)
B abort(SB)
MOVW 0(R13), m
MOVW 4(R13), g
// paranoia; check they are not nil
MOVW 0(m), R0
MOVW 0(g), R0
BL emptyfunc(SB) // fault if stack check is wrong
// Initialize m->procid to Linux tid
SWI $SYS_gettid
MOVW R0, m_procid(m)
// Call fn
MOVW 8(R13), R0
MOVW $16(R13), R13
BL (R0)
MOVW $0, R0
MOVW R0, 4(R13)
BL exit1(SB)
// It shouldn't return
MOVW $1234, R0
MOVW $1005, R1
MOVW R0, (R1)

8
test/arm-pass.txt
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@ -5,8 +5,11 @@ assign.go
bigalg.go
blank.go
blank1.go
bugs/bug212.go
bugs/bug213.go
chan/fifo.go
chan/goroutines.go
chan/nonblock.go
chan/perm.go
chan/powser1.go
chan/powser2.go
@ -33,6 +36,7 @@ convlit.go
convlit1.go
decl.go
declbad.go
defer.go
empty.go
env.go
escape.go
@ -116,6 +120,7 @@ fixedbugs/bug088.go
fixedbugs/bug089.go
fixedbugs/bug090.go
fixedbugs/bug091.go
fixedbugs/bug092.go
fixedbugs/bug093.go
fixedbugs/bug094.go
fixedbugs/bug096.go
@ -257,6 +262,7 @@ interface/convert1.go
interface/convert2.go
interface/embed.go
interface/embed0.go
interface/embed1.go
interface/explicit.go
interface/fail.go
interface/fake.go
@ -292,6 +298,7 @@ ken/robfunc.go
ken/robif.go
ken/shift.go
ken/simpbool.go
ken/simpconv.go
ken/simpfun.go
ken/simpprint.go
ken/simpswitch.go
@ -329,6 +336,7 @@ stringrange.go
switch.go
switch1.go
test0.go
turing.go
typeswitch.go
typeswitch1.go
utf.go