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authorWaldemar Brodkorb <wbx@openadk.org>2017-01-22 10:24:51 +0100
committerWaldemar Brodkorb <wbx@openadk.org>2017-01-28 10:31:19 +0100
commitbddde5860ffb8a78587854cc8e3e914bd69269ca (patch)
treed37c90a9ca983fb8be614844343ba2941927f88a /libc/sysdeps/linux/powerpc
parent30adfbeb8843c28869cc6ee33d7c556721cb241a (diff)
remove PID caching
Follow GNU C Library from c579f48edba88380635ab98cb612030e3ed8691e and remove the PID caching. These simplifies the architecture specific assembly code. The run of the test suite found no regressions, it even solves some of the test failures for x86/x86_64/sparc. Reviewed-by: Max Filippov <jcmvbkbc@gmail.com> Reviewed-by: Vineet Gupta <Vineet.Gupta1@synopsys.com> Acked-by: Matthew Fortune <Matthew.Fortune@imgtec.com> Acked-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Diffstat (limited to 'libc/sysdeps/linux/powerpc')
-rw-r--r--libc/sysdeps/linux/powerpc/Makefile.arch4
-rw-r--r--libc/sysdeps/linux/powerpc/clone.S30
2 files changed, 5 insertions, 29 deletions
diff --git a/libc/sysdeps/linux/powerpc/Makefile.arch b/libc/sysdeps/linux/powerpc/Makefile.arch
index f0144e7b9..9dc27c4a5 100644
--- a/libc/sysdeps/linux/powerpc/Makefile.arch
+++ b/libc/sysdeps/linux/powerpc/Makefile.arch
@@ -10,9 +10,7 @@ CSRC-$(if $(UCLIBC_HAS_LONG_DOUBLE_MATH),,y) += copysignl.c
SSRC-y := \
__longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S brk.S \
- __uClibc_syscall.S syscall.S
-
-SSRC-$(if $(UCLIBC_HAS_THREADS_NATIVE),,y) += clone.S vfork.S
+ __uClibc_syscall.S syscall.S clone.S vfork.S
ifeq ($(CONFIG_E500),y)
ARCH_HEADERS := fenv.h
diff --git a/libc/sysdeps/linux/powerpc/clone.S b/libc/sysdeps/linux/powerpc/clone.S
index 8efbbda1a..45319d00d 100644
--- a/libc/sysdeps/linux/powerpc/clone.S
+++ b/libc/sysdeps/linux/powerpc/clone.S
@@ -47,14 +47,10 @@ __clone:
/* Set up stack frame for parent. */
stwu r1,-32(r1)
cfi_adjust_cfa_offset (32)
-#ifdef RESET_PID
- stmw r28,16(r1)
-#else
-# ifndef __ASSUME_FIXED_CLONE_SYSCALL
+#ifndef __ASSUME_FIXED_CLONE_SYSCALL
stmw r29,16(r1)
-# else
+#else
stmw r30,16(r1)
-# endif
#endif
/* Set up stack frame for child. */
@@ -67,9 +63,6 @@ __clone:
#ifndef __ASSUME_FIXED_CLONE_SYSCALL
mr r29,r4 /* Stack pointer in r29. */
#endif
-#ifdef RESET_PID
- mr r28,r5
-#endif
mr r31,r6 /* Argument in r31. */
/* 'flags' argument is first parameter to clone syscall. (The other
@@ -101,17 +94,6 @@ __clone:
mr r1,r29
#endif
-#ifdef RESET_PID
- andis. r0,r28,CLONE_THREAD>>16
- bne+ r0,.Loldpid
- andi. r0,r28,CLONE_VM
- li r3,-1
- bne- r0,.Lnomoregetpid
-.Lnomoregetpid:
- stw r3,TID(r2)
- stw r3,PID(r2)
-.Loldpid:
-#endif
/* Call procedure. */
mtctr r30
mr r3,r31
@@ -121,14 +103,10 @@ __clone:
.Lparent:
/* Parent. Restore registers & return. */
-#ifdef RESET_PID
- lmw r28,16(r1)
-#else
-# ifndef __ASSUME_FIXED_CLONE_SYSCALL
+#ifndef __ASSUME_FIXED_CLONE_SYSCALL
lmw r29,16(r1)
-# else
+#else
lmw r30,16(r1)
-# endif
#endif
addi r1,r1,32
bnslr+