0a54e4010f
1997-07-26 04:14 Ulrich Drepper <drepper@cygnus.com> * elf/Makefile (distribute): Add genrtldtbl.awk. (before-compile): Add rtldtbl.h. (GAWK): New variable. (generated): Add trusted-dirs.h and rtldtbl.h. ($(objpfx)rtldtbl.h): New rule. File is needed by dl-load.c. * elf/dl-load.c: Rewrite. Now use cache and look for shared objects in machine dependent directories. * elf/dl-object.c (_dl_new_object): Initialize l_rpath_dirs member. * elf/dl-support.c: Rename function to non_dynamic_init and add initialization for _dl_platform, _dl_platformlen, _dl_pagesize and call to initializer for search path. * elf/elf.h: Add AT_PLATFORM and AT_HWCAP. * elf/genrtldtbl.awk: New file. * elf/link.h: Add type definitions and declarations for search path cache. * elf/rtld.c: Add definitions of variables used for search path cache. * sysdeps/generic/dl-sysdep.c: Let auxiliary vector initialize _dl_platform. Initialize _dl_pagesize early and use this value. * sysdeps/i386/dl-machine.h: Add code for _dl_platform handling. * sysdeps/mach/hurd/dl-sysdep.c: Initialize _dl_pagesize. * sysdeps/unix/sysv/linux/dl-sysdep.c: Use _dl_pagesize instead of calling getpagesize. * elf/dl-error.c (_dl_signal_error): Make message nicer. * nss/libnss_files.map: Fix typo. Reported by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>. * sysdeps/generic/strsep.c: Optimize case where separator set contains only one character. * sysdeps/libm-ieee754/s_ccosh.c: Correct sign of result for real == +-Inf. * sysdeps/libm-ieee754/s_ccoshf.c: Likewise. * sysdeps/libm-ieee754/s_ccoshl.c: Likewise. 1997-07-25 09:15 H.J. Lu <hjl@gnu.ai.mit.edu> * sysdeps/sparc/udiv_qrnnd.S: Check PIC instead of __PIC__. * sysdeps/unix/sysv/linux/sparc/__sigtrampoline.S: Likewise. * sysdeps/unix/mips/sysdep.S: Likewise. * sysdeps/unix/sysv/linux/mips/clone.S: Likewise. * sysdeps/mips/bsd-_setjmp.S: Remove __PIC__ comment. * sysdeps/mips/bsd-setjmp.S: Likewise. * sysdeps/mips/dl-machine.h: Remove extra stuff. * sysdeps/mips/mips64/dl-machine.h: Likewise. 1997-07-25 18:55 Philip Blundell <Philip.Blundell@pobox.com> * sysdeps/standalone/arm/sysdep.c: New file. 1997-07-25 13:25 Philip Blundell <Philip.Blundell@pobox.com> * aout/Makefile: New file. * Makeconfig (binfmt-subdir): Assume a.out when not ELF. * sysdeps/generic/machine-gmon.h: Add warning about limitations of __builtin_return_address(). * sysdeps/arm/machine-gmon.h: New file, use assembly to avoid above problem. 1997-07-25 16:24 H.J. Lu <hjl@gnu.ai.mit.edu> * elf/dl-deps.c (_dl_map_object_deps): Fix a typo. 1997-07-22 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * math/libm-test.c (ccos_test, ccosh_test): Fix sign in some tests. 1997-07-24 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sunrpc/clnt_udp.c (clntudp_call): Rename cu_wait from timeout to not shadow the variable in the outer scope.
126 lines
3.2 KiB
ArmAsm
126 lines
3.2 KiB
ArmAsm
/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu>, 1996.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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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 <sys/asm.h>
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#include <asm/unistd.h>
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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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/* int clone(int (*fn)(), void *child_stack, int flags, int nargs, ...) */
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#define FRAMESZ 4*SZREG
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#if _MIPS_SIM == _MIPS_SIM_ABI32
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#define MAX_REG_ARGS 4
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#else
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#define MAX_REG_ARGS 6
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#endif
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.text
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NESTED(__clone,4*SZREG,sp)
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#ifdef PIC
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.set noreorder
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.cpload $25
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.set reorder
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.cprestore 16
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#endif
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PTR_SUBIU sp,FRAMESZ
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#ifdef PROF
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.set noat
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move $1,ra
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jal _mcount
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.set at
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#endif
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/* Sanity check arguments. */
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li v0,EINVAL
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beqz a0,error /* no NULL function pointers */
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beqz a1,error /* no NULL stack pointers */
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bltz a3,error /* no negative argument counts */
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/* Allocate space on the new stack and copy args over */
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move t0,a3 # save nargs for __thread_start
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PTR_SLL t1,a3,PTR_SCALESHIFT
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PTR_ADDU t1,a3,sp
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1: REG_L t2,-SZREG(t1)
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PTR_SUBIU t1,SZREG
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REG_S t2,-SZREG(a1)
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PTR_SUBIU a3,1
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PTR_SUBIU a1,SZREG
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bnez a3,1b
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/* Do the system call */
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move t9,a0 # get fn ptr out of the way
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move a0,a2
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li v0,__NR_clone
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syscall
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bnez a3,error
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beqz v0,__thread_start
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/* Successful return from the parent */
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PTR_ADDIU sp,FRAMESZ
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ret
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/* Something bad happened -- no child created */
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error:
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PTR_ADDIU sp,FRAMESZ
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#ifdef PIC
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la t9,__syscall_error
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jr t9
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#else
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j __syscall_error
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#endif
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END(__clone)
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/* Load up the arguments to the function. Put this block of code in
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its own function so that we can terminate the stack trace with our
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debug info.
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At this point we have t0=nargs, t9=fn, sp=&arg[0]. */
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NESTED(__thread_start,32,sp)
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/* Stackframe has been created on entry of clone() */
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/* Calculate address of jump into argument loading code */
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li t1,MAX_REG_ARGS
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slt t0,t1,t2 /* max MAX_REG_ARGS args in registers */
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MOVN (t2,t1,t0)
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la v0,arg0
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PTR_SLL t1,t0,PTR_SCALESHIFT
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PTR_SUBU v0,t1
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jr v0
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/* Load the integer register arguments */
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REG_L a0,SZREG(sp)
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arg0:
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/* Call the user's function */
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jalr t9
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/* Call _exit rather than doing it inline for breakpoint purposes */
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move a0,v0
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jal _exit
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END(__thread_start)
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weak_alias(__clone, clone)
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