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[MIPS] Invalidate cached pid in vfork.

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Bug: http://b/23008979
Change-Id: I43e0c7db42602441313af4607a992caa8c7d6221
This commit is contained in:
Duane Sand
2015-08-11 17:00:56 -07:00
committed by Elliott Hughes
parent a3c01467ec
commit 61d9ae5ab1
2 changed files with 14 additions and 0 deletions
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8
libc/arch-mips/bionic/vfork.S
View File

@@ -37,6 +37,14 @@ ENTRY(vfork)
.set noreorder
.cpload t9
// __get_tls()[TLS_SLOT_THREAD_ID]->cached_pid_ = 0
.set push
.set mips32r2
rdhwr v0, $29 // v0 = tls; kernel trap on mips32r1
.set pop
lw v0, REGSZ*1(v0) // v0 = v0[TLS_SLOT_THREAD_ID ie 1]
sw $0, REGSZ*2+4(v0) // v0->cached_pid_ = 0
li a0, (CLONE_VM | CLONE_VFORK | SIGCHLD)
li a1, 0
li a2, 0

6
libc/arch-mips64/bionic/vfork.S
View File

@@ -46,6 +46,12 @@ LEAF(vfork,FRAMESZ)
PTR_SUBU sp, FRAMESZ
#endif
SETUP_GP64(a5, vfork)
// __get_tls()[TLS_SLOT_THREAD_ID]->cached_pid_ = 0
rdhwr v0, $29 // v0 = tls
REG_L v0, REGSZ*1(v0) // v0 = v0[TLS_SLOT_THREAD_ID ie 1]
sw $0, REGSZ*2+4(v0) // v0->cached_pid_ = 0
LI a0, (CLONE_VM | CLONE_VFORK | SIGCHLD)
move a1, $0
move a2, $0