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Thu Jun 13 17:25:11 1996 David Mosberger-Tang <davidm@azstarnet.com>

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* sysdeps/unix/bsd/osf/alpha/start.S (errno): Removed.
	* sysdeps/unix/sysv/linux/alpha/start.S: Ditto.
This commit is contained in:
Roland McGrath 1996-06-19 06:38:28 +00:00
parent 07f03a4d38
commit 93b781dd8c
2 changed files with 43 additions and 50 deletions
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2
sysdeps/unix/bsd/osf/alpha/start.S
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@ -18,8 +18,6 @@ Cambridge, MA 02139, USA. */
#include <sysdep.h>
.comm errno, 4
#if 0
.sdata
.globl STARTFRM

91
sysdeps/unix/sysv/linux/alpha/start.S
View File

@ -1,5 +1,5 @@
/* Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
Contributed by Brendan Kehoe (brendan@zen.org).
Contributed by Richard Henderson <rth@tamu.edu>
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
@ -18,81 +18,76 @@ Cambridge, MA 02139, USA. */
#include <sysdep.h>
.comm errno, 4
#ifdef __ELF__
.type errno, @object
#endif
.text
LEAF(__start, 16)
lda sp, -16(sp)
.prologue 0
.globl __start
.align 3
.ent __start, 0
__start:
.frame fp, 0, zero
mov zero, fp
br gp, 1f
1: ldgp gp, 0(gp)
.prologue 1
stq zero, 8(sp) /* terminate frame chain */
/* Save v0. When starting a binary via the dynamic linker, s0
contains the address of the shared library termination function,
which we will register below with atexit() to be called by exit().
If we are statically linked, this will be NULL. */
mov v0, s0
br t0, 1f
1: ldgp gp, 0(t0)
mov zero, a0 /* establish __fpu_control w/kernel */
jsr ra, __setfpucw
/* Do essential libc initialization (sp points to argc, argv, and envp) */
jsr ra, __libc_init_first
ldgp gp, 0(ra)
/* clear out errno. */
stl zero, (errno)
/* Now that we have the proper stack frame, register library termination
function, if there is any: */
ldl a0, 16(sp) /* get argc */
lda a1, 24(sp) /* get argv */
beq s0, 1f
mov s0, a0
jsr ra, atexit
ldgp gp, 0(ra)
1:
/* initialize environ: */
lda t0, environ
s8addq a0, a1, a2
addq a2, 0x8, a2
stq a2, 0(t0)
/* Extract the arguments and environment as encoded on the stack. */
ldl a0, 0(sp) /* get argc */
lda a1, 8(sp) /* get argv */
s8addq a0, a1, a2 /* get envp */
addq a2, 8, a2
stq a2, _environ
mov a0, s0
mov a0, s0 /* tuck them away */
mov a1, s1
mov a2, s2
#ifdef HAVE_INITFINI
/* register the _fini sections to ensure destructors get run: */
lda a0, _fini
jsr ra, atexit
ldgp gp, 0(ra)
/* Now run the _init section of the program itself. The _init
sections of shared libraries will be run by the dynamic linker. */
/* Call _init, the entry point to our own .init section. */
jsr ra, _init
ldgp gp, 0(ra)
/* initialize constructors: */
jsr ra, __main
/* Register our .fini section with atexit. */
lda a0, _fini
jsr ra, atexit
ldgp gp, 0(ra)
#else
jsr ra, __libc_init
/* initialize constructors: */
jsr ra, __main
ldgp gp, 0(ra)
#endif
mov s0, a0
mov s1, a1
mov s2, a2
/* Call the user's main and exit with its return value. */
jsr ra, main
ldgp gp, 0(ra)
mov v0, a0
jsr ra, exit
lda pv, exit
jsr ra, (pv), 1
ldgp gp, 0(ra)
/* in case exit returns: */
1: ldi v0, __NR_exit
call_pal PAL_callsys
br 1b
.end __start
/* Die very horribly if exit returns. Call_pal hlt is callable from
kernel mode only; this will result in an illegal instruction trap. */
call_pal 0
END(__start)
/* Define a symbol for the first piece of initialized data. */
.data