about summary refs log tree commit diff
path: root/sysdeps/sparc/elf
diff options
context:
space:
mode:
authorRoland McGrath <roland@gnu.org>1996-06-21 21:01:27 +0000
committerRoland McGrath <roland@gnu.org>1996-06-21 21:01:27 +0000
commit4f54cdb1dd4b8929231f42e22b79a0d5c7600cba (patch)
tree7780b1282b5f0849339424c2c94fc278f2dd8767 /sysdeps/sparc/elf
parent51fbd1f60a5c43fc5bde04952bc88b5545a83d13 (diff)
downloadglibc-4f54cdb1dd4b8929231f42e22b79a0d5c7600cba.tar.gz
glibc-4f54cdb1dd4b8929231f42e22b79a0d5c7600cba.tar.xz
glibc-4f54cdb1dd4b8929231f42e22b79a0d5c7600cba.zip
* sysdeps/sparc/elf/start.S: New file.
	* sysdeps/sparc/dl-machine.h: New file.

	* posix/fnmatch.c (fnmatch): Fix \*[*?]+ case to increment name ptr
 	only for ?s, not for *s.  Fix from Chet Ramey.

	Fixes thanks to Raja R Harinath <harinath@cs.umn.edu>:
	* sysdeps/unix/sysv/utmpbits.h: Define _HAVE_UT_{TYPE,ID,TV,HOST}.
	Use __{BEGIN,END}_DECLS.
	(_PATH_WTMP, _PATH_UTMP, _PATH_LASTLOG): New macros.
	* login/utmp.h (UTMP_FILE, UTMP_FILENAME, WTMP_FILE, WTMP_FILENAME):
	New macros, moved here from sysdeps/gnu/utmpbits.h.
	* sysdeps/generic/utmpbits.h (_HAVE_UT_HOST): Define it.
	* sysdeps/gnu/utmpbits.h (_HAVE_UT_HOST): Likewise.
	* login/logout.c: Use ut_host only #if _HAVE_UT_HOST.
	Use sizeof instead of UT_*SIZE.
	* login/logwtmp.c: Likewise.

	* misc/tsearch.c (tdelete): Define as weak alias to __tdelete.

	* version.c (banner): Add trailing newline.
Diffstat (limited to 'sysdeps/sparc/elf')
-rw-r--r--sysdeps/sparc/elf/start.S111
1 files changed, 111 insertions, 0 deletions
diff --git a/sysdeps/sparc/elf/start.S b/sysdeps/sparc/elf/start.S
new file mode 100644
index 0000000000..6dae08bafa
--- /dev/null
+++ b/sysdeps/sparc/elf/start.S
@@ -0,0 +1,111 @@
+/* Startup code compliant to the ELF SPARC ABI.
+Copyright (C) 1996 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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/* This is the canonical entry point, usually the first thing in the text
+   segment.  The SVR4/SPARC ABI (NOTE: I don't actually have it) says that
+   when the entry point runs, most registers' values are unspecified,
+   except for:
+
+   %g1		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(%sp)			argc
+		4(%sp)			argv[0]
+		...
+		(4*argc)(%sp)		NULL
+		(4*(argc+1))(%sp)	envp[0]
+		...
+					NULL
+*/
+
+	.text
+	.align 16
+	.global _start
+_start:
+	/* %g1 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.  */
+	orcc %g1, %g0, %o0	/* Move %g1 to %o0 while testing it.  */
+	be nofini
+
+	/* In delay slot: clear the frame pointer.  The ABI suggests this
+	   be done, to mark the outermost frame obviously.  */
+	clr %fp
+
+	/* Call atexit, argument was set in %o0 above.  */
+	call atexit
+	nop
+nofini:
+
+	/* We will use some local variables in registers below.  %g1 and
+	   the %oN registers are call-clobbered, so we can't just use them.  */
+#define ARGC	%l0
+#define ARGV	%l1
+#define ENVP	%l2
+#define TMP	%l3
+
+	/* 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.  */
+	call __libc_init_first
+	sethi %hi(_environ), TMP /* In delay slot: prepare to use &_environ. */
+
+	/* Extract the arguments and environment as encoded on the stack
+	   and save them in local variables.  */
+	ld [%sp + 64], ARGC	/* After the register save area, ARGC. */
+	add %sp, 64+4, ARGV	/* Next, the ARGV elements.  */
+	/* After ARGC words that are the ARGV elements, and a zero word,
+	   are the ENVP elements.  Do ENVP = &ARGV[ARGC + 1].  */
+	add ARGC, 1, ENVP
+	sll ENVP, 2, ENVP
+	add ARGV, ENVP, ENVP
+	/* Store ENVP in the global variable `_environ'.  */
+	st [TMP + %lo(_environ)], ENVP
+
+	/* 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.  */
+	call _init
+	sethi %hi(_fini), TMP	/* In delay slot of call.  */
+	or TMP, %lo(_fini), %o0	/* Argument to atexit is &_fini.  */
+	call atexit
+	nop
+
+	/* Call the user's main function, and exit with its value.  */
+	mov ARGC, %o0
+	mov ARGV, %o1
+	call main
+	mov ENVP, %o2
+
+	call exit		/* This should never return.  */
+	unimp 0			/* Crash if somehow it does return.  */
+
+/* Define a symbol for the first piece of initialized data.  */
+	.data
+	.global __data_start
+__data_start:
+	.long 0
+	.weak data_start
+	data_start = __data_start