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|
/* $OpenBSD: ldasm.S,v 1.31 2016/05/07 19:05:23 guenther Exp $ */
/*
* Copyright (c) 2001 Jason L. Wright (jason@thought.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*-
* Copyright (c) 2000 Eduardo Horvath.
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas and Paul Kranenburg.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/syscall.h>
#include <machine/trap.h>
#include <machine/asm.h>
#define DL_DATA_SIZE (16*4)
#define ARGC 96
.section ".text"
.align 4
.global _dl_start
.type _dl_start,@function
_dl_start:
sub %g0, %g0, %fp ! clear frame
sub %sp, 32 + DL_DATA_SIZE, %sp ! make room for dl_data
add %sp, ARGC, %l3
add %l3, DL_DATA_SIZE, %o0
mov %o0, %l0
/*
* need to figure out where _DYNAMIC is located newer binutils
* does not fill in GOT to read _DYNAMIC before relocation.
*/
call 0f
nop
call _DYNAMIC+8 ! not executed (no delay needed)
0: ld [%o7+8], %o2 ! load stub call instruction
sll %o2, 2, %o2 ! extract PC offset
sra %o2, 0, %o2 ! sign-extend
add %o2, %o7, %o2 ! real &_DYNAMIC
call _dl_boot_bind ! _dl_boot_bind(sp,dl_data,dynamicp)
mov %l3, %o1
mov %l3, %o3
ld [%l0], %l3 ! argc = *sp
sll %l3, 2, %l3 ! argc *= sizeof(long)
add %l0, 4, %o0 ! argv = [sp + argc]
add %l0, 8, %o1 ! envp = sp + 8 +
add %o1, %l3, %o1 ! + argc
add %o3, (7*4), %l2
ld [%l2], %o2 ! loff = dl_data[AUX_base];
call _dl_boot ! _dl_boot(argv,envp,loff,dl_data)
nop
add %sp, 32 + DL_DATA_SIZE, %sp ! restore stack
1: call 2f
sethi %hi(_GLOBAL_OFFSET_TABLE_+(.-1b)), %l7
2: or %l7, %lo(_GLOBAL_OFFSET_TABLE_+(.-1b)), %l7
add %l7, %o7, %l7
jmp %o0
ld [%l7 + _dl_dtors], %g1 ! %g1 = cleanup
.section ".text"
.align 4
.global _dl_bind_start
.type _dl_bind_start,@function
_dl_bind_start: # (obj, reloff)
save %sp, -96, %sp /* setup standard stack frame */
ld [%i7 + 8], %o0 /* obj id is in second PLT slot */
srl %g1, 10, %o1 /* offset is in high 22 bits */
call _dl_bind /* Call _rtld_bind(obj, offset) */
sub %o1, 12*4, %o1 /* first 4 `pltrel' entries missing! */
mov %o0, %g1 /* return value == function address */
restore /* get rid of our context */
jmp %g1 /* and the jmpslot context, then go. */
restore
.section ".text"
.align 4
.global _dl_close
.type _dl_close,@function
_dl_close:
mov SYS_close | SYSCALL_G2RFLAG, %g1 ! call sys_close
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_exit
.type _dl_exit,@function
_dl_exit:
mov SYS_exit | SYSCALL_G2RFLAG, %g1 ! call sys_exit
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_issetugid
.type _dl_issetugid,@function
_dl_issetugid:
mov SYS_issetugid | SYSCALL_G2RFLAG, %g1 ! call sys_issetugid
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_getthrid
.type _dl_getthrid,@function
_dl_getthrid:
mov SYS_getthrid | SYSCALL_G2RFLAG, %g1 ! call sys_getthrid
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl__syscall
.type _dl__syscall,@function
_dl__syscall:
mov SYS___syscall | SYSCALL_G2RFLAG, %g1 ! call sys_syscall
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_munmap
.type _dl_munmap,@function
_dl_munmap:
mov SYS_munmap | SYSCALL_G2RFLAG, %g1 ! calling sys_munmap
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_mprotect
.type _dl_mprotect,@function
_dl_mprotect:
mov SYS_mprotect | SYSCALL_G2RFLAG, %g1 ! calling sys_mprotect
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_open
.type _dl_open,@function
_dl_open:
mov SYS_open | SYSCALL_G2RFLAG, %g1 ! calling sys_open
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_read
.type _dl_read,@function
_dl_read:
mov SYS_read | SYSCALL_G2RFLAG, %g1 ! calling sys_read
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_write
.type _dl_write,@function
_dl_write:
mov SYS_write | SYSCALL_G2RFLAG, %g1 ! calling sys_write
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.globl _dl_fstat
.type _dl_fstat,@function
_dl_fstat:
mov SYS_fstat | SYSCALL_G2RFLAG, %g1 ! call sys_fstat
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.globl _dl_getdents
.type _dl_getdents,@function
_dl_getdents:
mov SYS_getdents | SYSCALL_G2RFLAG, %g1 ! call sys_getdents
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.globl _dl_sysctl
.type _dl_sysctl,@function
_dl_sysctl:
mov SYS_sysctl | SYSCALL_G2RFLAG, %g1 ! call sys_sysctl
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_gettimeofday
.type _dl_gettimeofday,@function
_dl_gettimeofday:
mov SYS_gettimeofday | SYSCALL_G2RFLAG, %g1 ! calling sys_gettimeofday
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_readlink
.type _dl_readlink,@function
_dl_readlink:
mov SYS_readlink | SYSCALL_G2RFLAG, %g1 ! calling sys_readlink
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_lstat
.type _dl_lstat,@function
_dl_lstat:
mov SYS_lstat | SYSCALL_G2RFLAG, %g1 ! calling sys_lstat
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_getcwd
.type _dl_getcwd,@function
_dl_getcwd:
mov SYS___getcwd | SYSCALL_G2RFLAG, %g1 ! calling sys_getcwd
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_utrace
.type _dl_utrace,@function
_dl_utrace:
mov SYS_utrace | SYSCALL_G2RFLAG, %g1 ! calling sys_utrace
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_getentropy
.type _dl_getentropy,@function
_dl_getentropy:
mov SYS_getentropy | SYSCALL_G2RFLAG, %g1 ! calling sys_getentropy
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_sendsyslog
.type _dl_sendsyslog,@function
_dl_sendsyslog:
mov SYS_sendsyslog | SYSCALL_G2RFLAG, %g1 ! calling sys_sendsyslog
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
.section ".text"
.align 4
.global _dl_pledge
.type _dl_pledge,@function
_dl_pledge:
mov SYS_pledge | SYSCALL_G2RFLAG, %g1 ! calling sys_pledge
add %o7, 8, %g2 ! just return on success
t ST_SYSCALL ! off to wonderland
retl
sub %g0, %o0, %o0 ! error: result = -errno
/*
* V8 sparc .{,u}{mul,div,rem} replacements.
* We try to mimic them 100%. Full 64 bit sources or outputs, and
* these routines are required to update the condition codes.
*/
.globl _C_LABEL(_mulreplace), _C_LABEL(_mulreplace_end)
_C_LABEL(_mulreplace):
smulcc %o0, %o1, %o0
retl
rd %y, %o1
_C_LABEL(_mulreplace_end):
.globl _C_LABEL(_umulreplace), _C_LABEL(_umulreplace_end)
_C_LABEL(_umulreplace):
umulcc %o0, %o1, %o0
retl
rd %y, %o1
_C_LABEL(_umulreplace_end):
.globl _C_LABEL(_divreplace), _C_LABEL(_divreplace_end)
_C_LABEL(_divreplace):
sra %o0, 31, %g1
wr %g1, 0, %y
nop
nop
nop
retl
sdivcc %o0, %o1, %o0
_C_LABEL(_divreplace_end):
.globl _C_LABEL(_udivreplace), _C_LABEL(_udivreplace_end)
_C_LABEL(_udivreplace):
wr %g0, 0, %y
nop
nop
nop
retl
udivcc %o0, %o1, %o0
_C_LABEL(_udivreplace_end):
.globl _C_LABEL(_remreplace), _C_LABEL(_remreplace_end)
_C_LABEL(_remreplace):
sra %o0, 31, %g1
wr %g1, 0, %y
nop
nop
nop
sdiv %o0, %o1, %o2
smul %o1, %o2, %o2
retl
subcc %o0, %o2, %o0
_C_LABEL(_remreplace_end):
.globl _C_LABEL(_uremreplace), _C_LABEL(_uremreplace_end)
_C_LABEL(_uremreplace):
wr %g0, 0, %y
nop
nop
nop
udiv %o0, %o1, %o2
umul %o1, %o2, %o2
retl
subcc %o0, %o2, %o0
_C_LABEL(_uremreplace_end):
|
