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2002-12-20  Art Haas  <ahaas@airmail.net>

	* sysdeps/gnu/siglist.c: Convert GCC extension initializer
	syntax to C99.

2002-12-21  Philip Blundell  <philb@gnu.org>

	* sysdeps/arm/elf/start.S (_start): Optimise a little.  Push stack
	top as seventh arg to __libc_start_main.
	Reported by paulnash@wildseed.com.

	* sysdeps/unix/sysv/linux/arm/clone.S: Small optimisation.

	* sysdeps/unix/sysv/linux/arm/sigcontextinfo.h: Elide
	compatibility cruft when new enough kernel is assumed.
This commit is contained in:
Ulrich Drepper 2002-12-21 18:53:25 +00:00
parent 7e791f32c8
commit e361ccd999
5 changed files with 53 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
ChangeLog
View File

@ -1,3 +1,19 @@
2002-12-20 Art Haas <ahaas@airmail.net>
* sysdeps/gnu/siglist.c: Convert GCC extension initializer
syntax to C99.
2002-12-21 Philip Blundell <philb@gnu.org>
* sysdeps/arm/elf/start.S (_start): Optimise a little. Push stack
top as seventh arg to __libc_start_main.
Reported by paulnash@wildseed.com.
* sysdeps/unix/sysv/linux/arm/clone.S: Small optimisation.
* sysdeps/unix/sysv/linux/arm/sigcontextinfo.h: Elide
compatibility cruft when new enough kernel is assumed.
2002-12-20 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/i386/brk.c (__brk): Use INTERNAL_SYSCALL

22
sysdeps/arm/elf/start.S
View File

@ -45,26 +45,34 @@
.globl _start
.type _start,#function
_start:
/* Fetch address of fini */
ldr ip, =__libc_csu_fini
/* Clear the frame pointer since this is the outermost frame. */
mov fp, #0
/* Pop argc off the stack and save a pointer to argv */
ldmfd sp!, {a2}
ldr a2, [sp], #4
mov a3, sp
/* Push the last arguments to main() onto the stack */
stmfd sp!, {a1}
ldr a1, =__libc_csu_fini
stmfd sp!, {a1}
/* Push stack limit */
str a3, [sp, #-4]!
/* Set up the other arguments for main() that go in registers */
/* Push rtld_fini */
str a1, [sp, #-4]!
/* Set up the other arguments in registers */
ldr a1, =main
ldr a4, =__libc_csu_init
/* __libc_start_main (main, argc, argv, init, fini, rtld_fini) */
/* Push fini */
str ip, [sp, #-4]!
/* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end) */
/* Let the libc call main and exit with its return code. */
bl __libc_start_main
/* should never get here....*/
bl abort

4
sysdeps/gnu/siglist.c
View File

@ -25,7 +25,7 @@
const char *const __new_sys_siglist[NSIG] =
{
#define init_sig(sig, abbrev, desc) [sig] desc,
#define init_sig(sig, abbrev, desc) [sig] = desc,
#include <siglist.h>
#undef init_sig
};
@ -38,7 +38,7 @@ declare_symbol (__old_sys_siglist, object, OLD_SIGLIST_SIZE * __WORDSIZE / 8)
const char *const __new_sys_sigabbrev[NSIG] =
{
#define init_sig(sig, abbrev, desc) [sig] abbrev,
#define init_sig(sig, abbrev, desc) [sig] = abbrev,
#include <siglist.h>
#undef init_sig
};

8
sysdeps/unix/sysv/linux/arm/clone.S
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
/* Copyright (C) 1996, 1997, 1998, 1999, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Pat Beirne <patb@corelcomputer.com>
@ -35,10 +35,8 @@ ENTRY(__clone)
beq PLTJMP(syscall_error)
@ insert the args onto the new stack
sub r1, r1, #8
str r3, [r1, #4]
@ save the function pointer as the 0th element
str r0, [r1]
str r3, [r1, #-4]!
str r0, [r1, #-4]!
@ do the system call
@ get flags

18
sysdeps/unix/sysv/linux/arm/sigcontextinfo.h
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1999 Free Software Foundation, Inc.
/* Copyright (C) 1999, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Philip Blundell <philb@gnu.org>, 1999.
@ -18,10 +18,22 @@
02111-1307 USA. */
#include <bits/armsigctx.h>
#include "kernel-features.h"
#define SIGCONTEXT int _a2, int _a3, int _a4, union k_sigcontext
#define SIGCONTEXT_EXTRA_ARGS _a2, _a3, _a4,
/* The sigcontext structure changed between 2.0 and 2.1 kernels. On any
modern system we should be able to assume that the "new" format will be
in use. */
#if __LINUX_KERNEL_VERSION > 131328
#define GET_PC(ctx) ((void *) ctx.v21.arm_pc)
#define GET_FRAME(ctx) ADVANCE_STACK_FRAME ((void *) ctx.v21.arm_fp)
#define GET_STACK(ctx) ((void *) ctx.v21.arm_sp)
#else
#define GET_PC(ctx) ((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
ctx.v20.reg.ARM_pc : ctx.v21.arm_pc))
#define GET_FRAME(ctx) \
@ -29,7 +41,11 @@
ctx.v20.reg.ARM_fp : ctx.v21.arm_fp))
#define GET_STACK(ctx) ((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
ctx.v20.reg.ARM_sp : ctx.v21.arm_sp))
#endif
#define ADVANCE_STACK_FRAME(frm) \
((struct layout *)frm - 1)
#define CALL_SIGHANDLER(handler, signo, ctx) \
(handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))