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c6bfe5c4d7
I've moved the ARM port from ports to the main sysdeps hierarchy. Beyond the README update, the move of the files was simply git mv ports/sysdeps/arm sysdeps/arm git mv ports/sysdeps/unix/arm sysdeps/unix/arm git mv ports/sysdeps/unix/sysv/linux/arm sysdeps/unix/sysv/linux/arm and in addition to the ChangeLog entries here, I put a note at the top of ports/ChangeLog.arm similar to that at the top of ChangeLog.powerpc. There is deliberately no NEWS change, as I think it makes the most sense to put in a general note above all ports having moved if we can achieve that for 2.20. Tested that disassembly of installed shared libraries for arm is the same before and after this patch, except for data (not instructions) in ld.so (there are assertions in sysdeps/arm/dl-machine.h, and the path by which that file is found, and so by which it appears in the assertion message, changes as a result of the move). * sysdeps/arm: Move directory from ports/sysdeps/arm. * sysdeps/unix/arm: Move directory from ports/sysdeps/unix/arm. * sysdeps/unix/sysv/linux/arm: Move directory from ports/sysdeps/unix/sysv/linux/arm. * README: Update listing for arm-*-linux-gnueabi. ports/ChangeLog.arm: * sysdeps/arm: Move directory to ../sysdeps/arm. * sysdeps/unix/arm: Move directory to ../sysdeps.arm. * sysdeps/unix/sysv/linux/arm: Move directory to ../sysdeps/unix/sysv/linux/arm.
100 lines
2.4 KiB
ArmAsm
100 lines
2.4 KiB
ArmAsm
/* Copyright (C) 1996-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Pat Beirne <patb@corelcomputer.com>
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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/* clone() is even more special than fork() as it mucks with stacks
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and invokes a function in the right context after its all over. */
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#include <sysdep.h>
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#define _ERRNO_H 1
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#include <bits/errno.h>
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#define CLONE_VM 0x00000100
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#define CLONE_THREAD 0x00010000
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/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
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pid_t *ptid, struct user_desc *tls, pid_t *ctid); */
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.text
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ENTRY(__clone)
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@ sanity check args
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cmp r0, #0
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ite ne
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cmpne r1, #0
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moveq r0, #-EINVAL
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beq PLTJMP(syscall_error)
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@ insert the args onto the new stack
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str r3, [r1, #-4]!
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str r0, [r1, #-4]!
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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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#ifdef RESET_PID
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mov ip, r2
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#endif
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@ new sp is already in r1
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push {r4, r7}
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cfi_adjust_cfa_offset (8)
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cfi_rel_offset (r4, 0)
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cfi_rel_offset (r7, 4)
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ldr r2, [sp, #8]
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ldr r3, [sp, #12]
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ldr r4, [sp, #16]
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ldr r7, =SYS_ify(clone)
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swi 0x0
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cfi_endproc
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cmp r0, #0
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beq 1f
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pop {r4, r7}
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blt PLTJMP(C_SYMBOL_NAME(__syscall_error))
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RETINSTR(, lr)
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cfi_startproc
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PSEUDO_END (__clone)
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1:
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.fnstart
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.cantunwind
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#ifdef RESET_PID
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tst ip, #CLONE_THREAD
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bne 3f
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GET_TLS (lr)
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mov r1, r0
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tst ip, #CLONE_VM
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ldr r7, =SYS_ify(getpid)
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ite ne
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movne r0, #-1
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swieq 0x0
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NEGOFF_ADJ_BASE (r1, TID_OFFSET)
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str r0, NEGOFF_OFF1 (r1, TID_OFFSET)
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str r0, NEGOFF_OFF2 (r1, PID_OFFSET, TID_OFFSET)
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3:
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#endif
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@ pick the function arg and call address off the stack and execute
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ldr r0, [sp, #4]
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ldr ip, [sp], #8
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BLX (ip)
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@ and we are done, passing the return value through r0
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b PLTJMP(HIDDEN_JUMPTARGET(_exit))
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.fnend
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weak_alias (__clone, clone)
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