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* sysdeps/sparc/sparc32/elf.S: Rewrite for __libc_start_main. * sysdeps/sparc/sparc64/elf.S: Likewise.

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* sysdeps/sparc/sparc32/elf.S: Rewrite for __libc_start_main.
	* sysdeps/sparc/sparc64/elf.S: Likewise.

1998-04-06  Richard Henderson  <rth@cygnus.com>
This commit is contained in:
Richard Henderson 1998-04-06 17:40:58 +00:00
parent deb2f929b5
commit a55400166d
3 changed files with 53 additions and 94 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
1998-04-06 Richard Henderson <rth@cygnus.com>
* sysdeps/sparc/sparc32/elf.S: Rewrite for __libc_start_main.
* sysdeps/sparc/sparc64/elf.S: Likewise.
1998-04-06 Richard Henderson <rth@cygnus.com>
* sysdeps/unix/sysv/linux/sparc/sparc32/socket.S: Revert 03-01 change,

62
sysdeps/sparc/sparc32/elf/start.S
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@ -1,5 +1,5 @@
/* Startup code for elf32-sparc
Copyright (C) 1997 Free Software Foundation, Inc.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
The GNU C Library is free software; you can redistribute it and/or
@ -31,56 +31,30 @@ _start:
mov %g0, %fp
sub %sp, 6*4, %sp
/* Save %g1. When starting a binary via the dynamic linker, %g1
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. */
/* Do essential libc initialization (sp points to argc, argv, and envp) */
call __libc_init_first
mov %g1, %l0
/* Now that we have the proper stack frame, register library termination
function, if there is any: */
cmp %l0, 0
beq 1f
nop
call atexit
mov %l0, %o0
1:
/* Extract the arguments and environment as encoded on the stack. The
argument info starts after one register window (16 words) past the SP. */
ld [%sp+22*4], %o0
add %sp, 23*4, %o1
sll %o0, 2, %o2
add %o2, %o1, %o2
sethi %hi(__environ), %g2
add %o2, 4, %o2
st %o2, [%g2+%lo(__environ)]
ld [%sp+22*4], %o1
add %sp, 23*4, %o2
mov %o0, %l0 /* tuck them away */
mov %o1, %l1
/* Load the addresses of the user entry points. */
sethi %hi(main), %o0
sethi %hi(_init), %o3
sethi %hi(_fini), %o4
or %o0, %lo(main), %o0
or %o3, %lo(_init), %o3
or %o4, %lo(_fini), %o4
/* Call _init, the entry point to our own .init section. */
call _init
mov %o2, %l2
/* When starting a binary via the dynamic linker, %g1 contains the
address of the shared library termination function, which will be
registered with atexit(). If we are statically linked, this will
be NULL. */
mov %g1, %o5
/* Register our .fini section with atexit. */
sethi %hi(_fini), %o0
call atexit
add %o0, %lo(_fini), %o0
/* Call the user's main and exit with its return value. */
mov %l0, %o0
mov %l1, %o1
call main
mov %l2, %o2
call exit
/* Let libc do the rest of the initialization, and call main. */
call __libc_start_main
nop
/* Die very horribly if exit returns. */
unimp
.size _start,.-_start
.size _start, .-_start

80
sysdeps/sparc/sparc64/elf/start.S
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@ -1,5 +1,5 @@
/* Startup code for elf64-sparc
Copyright (C) 1997 Free Software Foundation, Inc.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
The GNU C Library is free software; you can redistribute it and/or
@ -26,68 +26,48 @@
.type _start,#function
_start:
/* First order of business is to load %g4 with our base address. */
sethi %uhi(_start), %g4
or %g4, %ulo(_start), %g4
sllx %g4, 32, %g4
/* Terminate the stack frame, and reserve space for functions to
drop their arguments. */
mov %g0, %fp
sub %sp, 6*8, %sp
/* Save %g1. When starting a binary via the dynamic linker, %g1
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. */
/* Do essential libc initialization (sp points to argc, argv, and envp) */
call __libc_init_first
mov %g1, %l0
/* Now that we have the proper stack frame, register library termination
function, if there is any: */
brz,pn %l0, 1f
nop
call atexit
mov %l0, %o0
1:
/* Extract the arguments and environment as encoded on the stack. The
argument info starts after one register window (16 words) past the SP,
plus the bias we added, plus the magic v9 STACK_BIAS. */
ldx [%sp+STACK_BIAS+22*8], %o0
add %sp, STACK_BIAS+23*8, %o1
sllx %o0, 3, %o2
add %o2, %o1, %o2
sethi %hi(__environ), %g2
add %o2, 8, %o2
add %g2, %g4, %g2
stx %o2, [%g2+%lo(__environ)]
ldx [%sp+STACK_BIAS+22*8], %o1
add %sp, STACK_BIAS+23*8, %o2
mov %o0, %l0 /* tuck them away */
mov %o1, %l1
/* Load the addresses of the user entry points. */
sethi %uhi(main), %o0
sethi %uhi(_init), %o3
sethi %uhi(_fini), %o4
or %o0, %ulo(main), %o0
or %o3, %ulo(_init), %o3
or %o4, %ulo(_fini), %o4
sethi %hi(main), %i0
sethi %hi(_init), %i3
sethi %hi(_fini), %i4
sllx %o0, 32, %o0
or %i0, %lo(main), %i0
sllx %o3, 32, %o3
or %i3, %lo(_init), %i3
sllx %o4, 32, %o4
or %i4, %lo(_fini), %i4
or %o0, %i0, %o0
or %o3, %i3, %o3
or %o4, %i4, %o4
/* Call _init, the entry point to our own .init section. */
call _init
mov %o2, %l2
/* When starting a binary via the dynamic linker, %g1 contains the
address of the shared library termination function, which will be
registered with atexit(). If we are statically linked, this will
be NULL. */
mov %g1, %o5
/* Register our .fini section with atexit. */
sethi %hi(_fini), %o0
add %o0, %g4, %o0
call atexit
add %o0, %lo(_fini), %o0
/* Call the user's main and exit with its return value. */
mov %l0, %o0
mov %l1, %o1
call main
mov %l2, %o2
call exit
/* Let libc do the rest of the initialization, and call main. */
call __libc_start_main
nop
/* Die very horribly if exit returns. */
illtrap 0
.size _start,.-_start
.size _start, .-_start