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authorUlrich Drepper <drepper@redhat.com>1998-03-18 14:42:25 +0000
committerUlrich Drepper <drepper@redhat.com>1998-03-18 14:42:25 +0000
commit3116126871400c8737a9df0145f66534f097c06c (patch)
tree9a41a87b932c3963a7d482ceabc8de92c69bef5b /sysdeps/arm/elf
parent52cda95831cdc685d74b99334a06fb1f69996dc4 (diff)
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Update.
1998-03-18 14:25 Ulrich Drepper <drepper@cygnus.com> * string/bits/string2.h: Add optimization for strdup. Always define __strsep and __strtok_r and make real names available when feature select macros are defined. 1998-03-18 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/install.texi (Installation): Use i486-linux as example instead of the unsupported sunos4. (Reporting Bugs): Mention glibcbug script. (Tools for Installation): gcc 2.8.1/egcs 1.0.2 is required. 1998-03-16 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * posix/wordexp-tst.sh: Make portable. Add more tests. * posix/Makefile (do-globtest do-wordexp-test): New targets. 1998-03-18 13:38 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/libc-start.c: Moved to ... * sysdeps/generic/libc-start.c: ...here, replacing former content. * sysdeps/unix/sysv/linux/Dist: Add netash/ash.h and netpacket/packet.h. * sysdeps/unix/sysv/linux/bits/socket.h: Pretty print. 1998-03-17 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/bits/resource.h: Remove trailing comma in enumerator for strict standard compliance. * sysdeps/generic/bits/resource.h: Likewise. 1998-03-18 10:04 Philip Blundell <pb@nexus.co.uk> * sysdeps/arm/sysdep.h (__ARM_USES_FP): Deleted. (PLTJMP): New macro. * sysdeps/arm/fpu/__longjmp.S: New file, implementation of longjmp() when floating point enabled. * sysdeps/arm/fpu/setjmp.S: Likewise for setjmp(). * sysdeps/arm/__longjmp.S: Remove floating point code. * sysdeps/arm/setjmp.S: Likewise. * sysdeps/arm/bsd-setjmp.S: Call __sigsetjmp by correct name. * sysdeps/arm/bsd-_setjmp.S: Likewise. * sysdeps/arm/memset.S: New file; optimised ARM implementation of memset(). * sysdeps/generic/setsockopt.c (setsockopt): Keep in step with prototype. 1998-03-17 16:16 Philip Blundell <pb@nexus.co.uk> Based on patches from Pat Beirne and Scott Bambrough: * sysdeps/arm/__longjmp.S: Use ip, not r2, as temporary. * sysdeps/arm/bits/fenv.h: New file. * sysdeps/arm/dl-machine.h: New file. Add ELF support. * sysdeps/arm/elf/setjmp.S: Likewise. * sysdeps/arm/elf/start.S: Likewise. * sysdeps/arm/init-first.c: Likewise. * sysdeps/arm/setjmp.S: Call __sigjmp_save through PLT * sysdeps/arm/sysdep.h: Change format of .type directive. Correct comment about floating point to reflect current reality. * sysdeps/unix/arm/brk.S: Support PIC. * sysdeps/unix/arm/sysdep.S (syscall_error): Support PIC and re-entrant code. * sysdeps/unix/sysv/linux/arm/socket.S: Check correctly for error return; call syscall_error through PLT. * sysdeps/unix/sysv/linux/arm/sysdep.h (ENTRY): Correct error jump. 1998-03-04 12:01 Philip Blundell <pb@nexus.co.uk> * sysdeps/unix/sysv/linux/netpacket/packet.h: New file. * sysdeps/unix/sysv/linux/netash/ash.h: Likewise. * sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Install them.
Diffstat (limited to 'sysdeps/arm/elf')
-rw-r--r--sysdeps/arm/elf/setjmp.S76
-rw-r--r--sysdeps/arm/elf/start.S109
2 files changed, 185 insertions, 0 deletions
diff --git a/sysdeps/arm/elf/setjmp.S b/sysdeps/arm/elf/setjmp.S
new file mode 100644
index 0000000000..51572ca515
--- /dev/null
+++ b/sysdeps/arm/elf/setjmp.S
@@ -0,0 +1,76 @@
+/* setjmp for arm, ELF version.
+ Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <sysdep.h>
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+ /* We include the BSD entry points here as well but we make
+ them weak. */
+ENTRY (setjmp)
+ .weak C_SYMBOL_NAME (setjmp)
+ @ call comes here with
+ @ lr = return pc
+ @ r0 = &jump_buf
+
+ @ add a second argument into the fray
+ mov r1, #1
+ @ call the common code
+ b __sigsetjmp(PLT)
+END (setjmp)
+
+ /* Binary compatibility entry point. */
+ENTRY (_setjmp)
+ .weak C_SYMBOL_NAME (_setjmp)
+ENTRY (__setjmp)
+ @ call comes here with
+ @ lr = return pc
+ @ r0 = &jump_buf
+
+ @ add a second argument into the fray
+ mov r1, #1
+ @ fall through to the common code....
+
+ENTRY (__sigsetjmp)
+ @ save the registers into the jmp_buf....
+ stmia r0, {r1-r6, sl, fp, sp, lr}
+
+ /* Make a tail call to __sigjmp_save; it takes the same args. */
+#ifdef PIC
+ /* We cannot use the PLT, because it requires that sl==r10 be set, but
+ we can't save and restore our caller's value. Instead, we do an
+ indirect jump through the GOT, using for the temporary register
+ ip, which is call-clobbered. */
+ ldr ip, 1f
+ add ip, ip, pc
+2: @ get the address of __sigjmp_save
+ ldr r1, 3f
+ ldr ip, [ip, r1]
+ @ restore r1
+ ldr r1, [r0]
+ @ jump to *__sigjmp_save
+ mov pc, ip
+1: .word _GLOBAL_OFFSET_TABLE_ - 2b - 4
+3: .word __sigjmp_save(GOT)
+
+#else
+ b __sigjmp_save
+#endif
+END (__sigsetjmp)
diff --git a/sysdeps/arm/elf/start.S b/sysdeps/arm/elf/start.S
new file mode 100644
index 0000000000..e0964a1e38
--- /dev/null
+++ b/sysdeps/arm/elf/start.S
@@ -0,0 +1,109 @@
+/* Startup code for ARM & ELF
+ Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* This is the canonical entry point, usually the first thing in the text
+ segment.
+
+ Note that the code in the .init section has already been run.
+ This includes _init and _libc_init
+
+
+ At this entry point, most registers' values are unspecified, except for:
+
+ r0 Contains a function pointer to be registered with `atexit'.
+ This is how the dynamic linker arranges to have DT_FINI
+ functions called for shared libraries that have been loaded
+ before this code runs.
+
+ sp The stack contains the arguments and environment:
+ 0(%esp) argc
+ 4(%esp) argv[0]
+ ...
+ (4*argc)(%esp) NULL
+ (4*(argc+1))(%esp) envp[0]
+ ...
+ NULL
+*/
+
+ .text
+ .globl _start
+_start:
+ /* Clear the frame pointer. The Intel ABI suggests this be done,
+ to mark the outermost frame obviously. This seems like a
+ sensible thing to do */
+ mov fp, #0
+
+ /* r0 contains the address of the shared library termination
+ function, which we will register with `atexit' to be called by
+ `exit'. I suspect that on some systems, and when statically
+ linked, this will not be set by anything to any function
+ pointer; hopefully it will be zero so we don't try to call
+ random pointers. */
+ cmp r0,#0
+ blne atexit(PLT)
+
+ /* Do essential libc initialization. In statically linked
+ programs under the GNU Hurd, this is what sets up the
+ arguments on the stack for the code below. For dyn-link
+ programs, this has been run already, in the .init code. */
+#ifndef PIC
+ bl __libc_init_first
+
+ /* Extract the arguments and environment as encoded on the stack
+ and set up the arguments for `main': argc, argv, envp. */
+ ldr r0,[sp]
+ add r1,sp,#4
+ add r2,r1,r0,lsl #2
+ add r2,r2,#4
+ /* save a copy of envp while we have it */
+ ldr r3,L_environ
+ str r2,[r3]
+
+ /* Call `_init', which is the entry point to our own `.init'
+ section; and register with `atexit' to have `exit' call
+ `_fini', which is the entry point to our own `.fini' section. */
+ bl _init
+ ldr r0,L_fini
+ bl atexit
+ b L_pfini
+
+L_fini: .word _fini
+L_environ: .word _environ
+L_pfini:
+#endif
+ /* rebuild the arg list for main() */
+ ldr r0,[sp]
+ add r1,sp,#4
+ add r2,r1,r0,lsl #2
+ add r2,r2,#4
+
+ /* Call the user's main function, and exit with its value. */
+ bl main
+ bl exit
+ /* should never get here....*/
+ bl abort
+
+
+/* Define a symbol for the first piece of initialized data. */
+ .data
+ .globl __data_start
+__data_start:
+ .long 0
+ .weak data_start
+ data_start = __data_start