420878c690
Add a macro to annotate function end and start using both ENTRY and END for each function. This allows valgrind (and presumably other debugging tools) to use the debug symbols to trace the functions. Change-Id: I5f09cef8e22fb356eb6f5cee952b031e567599b6
118 lines
3.4 KiB
ArmAsm
118 lines
3.4 KiB
ArmAsm
/*
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* Copyright (C) 2008-2010 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/linux-syscalls.h>
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#include <machine/asm.h>
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ENTRY(__pthread_clone)
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@ insert the args onto the new stack
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str r0, [r1, #-4]
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str r3, [r1, #-8]
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@ do the system call
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@ get flags
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mov r0, r2
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@ new sp is already in r1
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#if __ARM_EABI__
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stmfd sp!, {r4, r7}
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ldr r7, =__NR_clone
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swi #0
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#else
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swi #__NR_clone
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#endif
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movs r0, r0
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#if __ARM_EABI__
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ldmnefd sp!, {r4, r7}
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#endif
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blt __error
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bxne lr
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@ pick the function arg and call address off the stack and jump
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@ to the C __thread_entry function which does some setup and then
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@ calls the thread's start function
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ldr r0, [sp, #-4]
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ldr r1, [sp, #-8]
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mov r2, sp @ __thread_entry needs the TLS pointer
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b __thread_entry
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__error:
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mov r0, #-1
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bx lr
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END(__pthread_clone)
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#
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# This function is defined as:
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#
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# pid_t __bionic_clone( int flags, void *child_stack,
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# pid_t *pid, void *tls, pid_t *ctid,
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# int (*fn)(void *), void* arg );
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#
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# NOTE: This is not the same signature than the GLibc
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# __clone function here !! Placing 'fn' and 'arg'
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# at the end of the parameter list makes the
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# implementation much simpler.
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#
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ENTRY(__bionic_clone)
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mov ip, sp
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.save {r4, r5, r6, r7}
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# save registers to parent stack
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stmfd sp!, {r4, r5, r6, r7}
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# load extra parameters
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ldmfd ip, {r4, r5, r6}
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# store 'fn' and 'arg' to the child stack
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str r5, [r1, #-4]
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str r6, [r1, #-8]
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# system call
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ldr r7, =__NR_clone
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swi #0
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movs r0, r0
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beq 1f
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# in parent, reload saved registers
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# then either exit or error
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#
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ldmfd sp!, {r4, r5, r6, r7}
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bxne lr
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b __set_syscall_errno
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1: # in the child - pick arguments
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ldr r0, [sp, #-4]
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ldr r1, [sp, #-8]
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b __bionic_clone_entry
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END(__bionic_clone)
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