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authorUlrich Drepper <drepper@redhat.com>1998-03-31 23:18:03 +0000
committerUlrich Drepper <drepper@redhat.com>1998-03-31 23:18:03 +0000
commitf709e93784a0314a77b7a71fa44a5368fb54d88d (patch)
tree88795eaac4263df3d1f4366f5361a06302ba02b9 /sysdeps/alpha
parent161756fe4fc94e5af68bda5162abc4b32a65cf58 (diff)
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(_start): Let __libc_start_main do most of the init stuff.
Diffstat (limited to 'sysdeps/alpha')
-rw-r--r--sysdeps/alpha/elf/start.S58
1 files changed, 13 insertions, 45 deletions
diff --git a/sysdeps/alpha/elf/start.S b/sysdeps/alpha/elf/start.S
index a67a39a49f..1330d1fda2 100644
--- a/sysdeps/alpha/elf/start.S
+++ b/sysdeps/alpha/elf/start.S
@@ -1,5 +1,5 @@
/* Startup code for Alpha/ELF.
- Copyright (C) 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <rth@tamu.edu>
@@ -31,56 +31,24 @@ _start:
1: ldgp gp, 0(gp)
.prologue 1
- /* 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
+ /* Load address of the user's main function. */
+ lda a0, main
- /* Do essential libc initialization (sp points to argc, argv, and envp) */
- jsr ra, __libc_init_first
- ldgp gp, 0(ra)
-
- /* Now that we have the proper stack frame, register library termination
- function, if there is any: */
-
- beq s0, 1f
- mov s0, a0
- jsr ra, atexit
- ldgp gp, 0(ra)
-1:
-
- /* 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
+ ldl a1, 0(sp) /* get argc */
+ lda a2, 8(sp) /* get argv */
- mov a0, s0 /* tuck them away */
- mov a1, s1
- mov a2, s2
+ /* Load address of our own entry points to .fini and .init. */
+ lda a3, _init
+ lda a4, _fini
- /* Call _init, the entry point to our own .init section. */
- jsr ra, _init
- ldgp gp, 0(ra)
+ /* Store address of the shared library termination function. */
+ mov v0, a5
- /* Register our .fini section with atexit. */
- lda a0, _fini
- jsr ra, atexit
+ /* Call the user's main function, and exit with its value.
+ But let the libc call main. */
+ jsr ra, __libc_start_main
ldgp gp, 0(ra)
- /* Call the user's main and exit with its return value. */
- mov s0, a0
- mov s1, a1
- mov s2, a2
-
- jsr ra, main
- ldgp gp, 0(ra)
-
- mov v0, a0
- jsr ra, exit
-
/* 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