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am b4f2112f: Merge "[MIPS] Invalidate cached pid in vfork."

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* commit 'b4f2112fa99dab401cd65db4c524d95b1e97614e':
  [MIPS] Invalidate cached pid in vfork.
This commit is contained in:
Elliott Hughes 2015-08-12 03:02:35 +00:00 committed by Android Git Automerger
commit 1789ac90f7
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