about summary refs log tree commit diff
path: root/sysdeps/arm/elf
diff options
context:
space:
mode:
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)
downloadglibc-3116126871400c8737a9df0145f66534f097c06c.tar.gz
glibc-3116126871400c8737a9df0145f66534f097c06c.tar.xz
glibc-3116126871400c8737a9df0145f66534f097c06c.zip
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