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bionic: Stack pointer/signal race condition.

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Move the stackpointer so a captured signal does not corrupt
stack variables needed for __thread_entry.

Change-Id: I3e1e7b94a6d7cd3a07081f849043262743aa8064
This commit is contained in:
Peter Enderborg 2012-07-09 16:17:17 +02:00 committed by Johan Redestig
parent f6ee33cee7
commit 3460db9490
1 changed files with 2 additions and 4 deletions
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6
libc/arch-arm/bionic/clone.S
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@ -30,8 +30,7 @@
ENTRY(__pthread_clone)
@ insert the args onto the new stack
str r0, [r1, #-4]
str r3, [r1, #-8]
stmdb r1!, {r0, r3}
@ do the system call
@ get flags
@ -60,8 +59,7 @@ ENTRY(__pthread_clone)
@ to the C __thread_entry function which does some setup and then
@ calls the thread's start function
ldr r0, [sp, #-4]
ldr r1, [sp, #-8]
pop {r0, r1}
mov r2, sp @ __thread_entry needs the TLS pointer
b __thread_entry