From e58798e107d652644629a1daaa95d76430808d53 Mon Sep 17 00:00:00 2001 From: Austin Foxley Date: Sat, 17 Oct 2009 13:23:11 -0700 Subject: arm specific bits needed for nptl * SAVE_PID, RESTORE_PID in vfork.S * clone.S tweaks to allow for the pid to be reset Signed-off-by: Austin Foxley --- libc/sysdeps/linux/arm/Makefile.arch | 16 +++++++++++++--- libc/sysdeps/linux/arm/clone.S | 23 ++++++++++++++++++----- libc/sysdeps/linux/arm/libc-aeabi_read_tp.S | 1 + libc/sysdeps/linux/arm/libc-thumb_atomics.S | 1 + libc/sysdeps/linux/arm/vfork.S | 13 +++++++++++++ 5 files changed, 46 insertions(+), 8 deletions(-) create mode 100644 libc/sysdeps/linux/arm/libc-aeabi_read_tp.S create mode 100644 libc/sysdeps/linux/arm/libc-thumb_atomics.S (limited to 'libc') diff --git a/libc/sysdeps/linux/arm/Makefile.arch b/libc/sysdeps/linux/arm/Makefile.arch index c3c55258a..bec06ff44 100644 --- a/libc/sysdeps/linux/arm/Makefile.arch +++ b/libc/sysdeps/linux/arm/Makefile.arch @@ -5,14 +5,24 @@ # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. # -CSRC := brk.c ioperm.c iopl.c mmap.c sigaction.c __syscall_error.c +CSRC := brk.c ioperm.c iopl.c mmap.c __syscall_error.c + +ifneq ($(UCLIBC_HAS_THREADS_NATIVE),y) +CSRC += sigaction.c +endif SSRC := \ - __longjmp.S vfork.S clone.S setjmp.S bsd-setjmp.S \ + __longjmp.S setjmp.S bsd-setjmp.S \ bsd-_setjmp.S sigrestorer.S mmap64.S +ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y) +SSRC += libc-aeabi_read_tp.S libc-thumb_atomics.S +else +SSRC += vfork.S clone.S +endif + ifeq ($(UCLIBC_HAS_ADVANCED_REALTIME),y) - CSRC += posix_fadvise.c posix_fadvise64.c +CSRC += posix_fadvise.c posix_fadvise64.c endif ifeq ($(CONFIG_ARM_EABI),y) diff --git a/libc/sysdeps/linux/arm/clone.S b/libc/sysdeps/linux/arm/clone.S index d9483735d..fdc05b88b 100644 --- a/libc/sysdeps/linux/arm/clone.S +++ b/libc/sysdeps/linux/arm/clone.S @@ -30,12 +30,12 @@ /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ .text -.global clone -.type clone,%function +.global __clone +.type __clone,%function .align 2 #if defined(THUMB1_ONLY) .thumb_func -clone: +__clone: @ sanity check args cmp r0, #0 beq __einval @@ -52,9 +52,15 @@ clone: @ get flags mov r0, r2 @ new sp is already in r1 + @ load remaining arguments off the stack + stmfd sp!, {r4} + ldr r2, [sp, #4] + ldr r3, [sp, #8] + ldr r4, [sp, #12] DO_CALL (clone) movs a1, a1 blt __error + ldmnefd sp!, {r4} beq 1f bx lr 1: @@ -80,7 +86,7 @@ __error: POP_RET .pool #else -clone: +__clone: @ sanity check args cmp r0, #0 IT(te, ne) @@ -98,9 +104,15 @@ clone: @ get flags mov r0, r2 @ new sp is already in r1 + @ load remaining arguments off the stack + stmfd sp!, {r4} + ldr r2, [sp, #4] + ldr r3, [sp, #8] + ldr r4, [sp, #12] DO_CALL (clone) movs a1, a1 blt __error + ldmnefd sp!, {r4} IT(t, ne) #if defined(__USE_BX__) bxne lr @@ -120,6 +132,7 @@ __error: b __syscall_error #endif -.size clone,.-clone +.size __clone,.-__clone +weak_alias(__clone, clone) #endif diff --git a/libc/sysdeps/linux/arm/libc-aeabi_read_tp.S b/libc/sysdeps/linux/arm/libc-aeabi_read_tp.S new file mode 100644 index 000000000..3aa135bf2 --- /dev/null +++ b/libc/sysdeps/linux/arm/libc-aeabi_read_tp.S @@ -0,0 +1 @@ +#include diff --git a/libc/sysdeps/linux/arm/libc-thumb_atomics.S b/libc/sysdeps/linux/arm/libc-thumb_atomics.S new file mode 100644 index 000000000..e7bc8950d --- /dev/null +++ b/libc/sysdeps/linux/arm/libc-thumb_atomics.S @@ -0,0 +1 @@ +#include diff --git a/libc/sysdeps/linux/arm/vfork.S b/libc/sysdeps/linux/arm/vfork.S index 42595b026..17d6a4db0 100644 --- a/libc/sysdeps/linux/arm/vfork.S +++ b/libc/sysdeps/linux/arm/vfork.S @@ -12,6 +12,15 @@ #include #include +#ifndef SAVE_PID +#define SAVE_PID +#endif + +#ifndef RESTORE_PID +#define RESTORE_PID +#endif + + #ifdef __NR_fork .text .global __vfork @@ -23,7 +32,9 @@ .thumb_func __vfork: #ifdef __NR_vfork + SAVE_PID DO_CALL (vfork) + RESTORE_PID ldr r1, =0xfffff000 cmp r0, r1 bcs 1f @@ -57,7 +68,9 @@ __error: __vfork: #ifdef __NR_vfork + SAVE_PID DO_CALL (vfork) + RESTORE_PID cmn r0, #4096 IT(t, cc) #if defined(__USE_BX__) -- cgit v1.2.3