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/* $OpenBSD: ldasm.S,v 1.9 2013/04/05 12:58:03 kurt Exp $ */
/*
* Copyright (c) 2004 Michael Shalayeff
* 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 OR HIS RELATIVES 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 MIND, 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/asm.h>
#define _LOCORE
#include <machine/frame.h>
#include <machine/vmparam.h>
#undef _LOCORE
ENTRY(_dl_start,32)
copy r3, r1
copy sp, r3
stwm r1, HPPA_FRAME_SIZE+16*4(sp)
stw %arg0, HPPA_FRAME_ARG(0)(r3) /* ps_strings */
#define ADDR(s,r) \
bl 4, t1 !\
depi 0, 31, 2, t1 /* kill pl bits */ !\
b s /* cold brunch -- never done */ !\
ldw 0(t1), t2 /* cat(w,w1,w2{10},w2{0..9}) << 2 */ !\
extru t2, 28, 10, t3 /* w2{0..9} */ !\
extru t2, 26, 16, r /* w1 */ !\
dep t3, 31, 11, r !\
extru,= t2, 31, 1, r0 /* w */ !\
depi 1, 15, 1, r !\
extru,= t2, 29, 1, r0 /* w2{10} */ !\
depi 1, 21, 1, r !\
sh2add r, t1, r /* plus the base */ !\
addi 8, r, r /* bl target is -8 */
ADDR(_GLOBAL_OFFSET_TABLE_, r19)
ADDR(_DYNAMIC, arg2)
stw arg2, HPPA_FRAME_ARG(1)(r3)
/* make sure to get a fault until it's set proper */
ldi -1, %dp
ldw 0(arg0), arg0
ldo 4(r3), arg1 /* dl_data */
bl _dl_boot_bind, rp
ldo -4(arg0), arg0
ldw HPPA_FRAME_ARG(1)(r3), arg1 /* &_DYNAMIC */
ldw HPPA_FRAME_ARG(0)(r3), arg3 /* ps_strings */
ldw 0(r19), arg2
sub arg1, arg2, arg2 /* loff */
ldw 0(arg3), arg0 /* argv */
ldw 8(arg3), arg1 /* envp */
bl _dl_boot, rp
ldo 4(r3), arg3 /* dl_data */
ldw HPPA_FRAME_ARG(0)(r3), arg0 /* ps_strings */
copy r0, arg1 /* cleanup */
ldo HPPA_FRAME_SIZE(r3), sp
copy r0, rp
bv r0(ret0)
ldwm -HPPA_FRAME_SIZE(sp), r3
EXIT(_dl_start)
/*
* void _hppa_dl_dtors(void);
*/
ENTRY(_hppa_dl_dtors,0)
ADDR(_GLOBAL_OFFSET_TABLE_, r19)
b _dl_dtors
nop
EXIT(_hppa_dl_dtors)
LEAF_ENTRY(_hppa_dl_set_dp)
bv r0(rp)
copy arg0, r27
EXIT(_hppa_dl_set_dp)
/*
* void hppa_call(void (*arg)(void), void *r19, Elf_Addr func);
*/
ENTRY(hppa_call,0)
copy r3, r1
copy sp, r3
stwm r1, HPPA_FRAME_SIZE(sp)
stw r19, HPPA_FRAME_SL(r3)
stw rp, HPPA_FRAME_CRP(r3)
copy arg1, r19
.call
blr r0, rp
bv,n (arg2)
nop
ldw HPPA_FRAME_CRP(r3), rp
ldw HPPA_FRAME_SL(r3), r19
ldo HPPA_FRAME_SIZE(r3), sp
bv r0(rp)
ldwm -HPPA_FRAME_SIZE(sp), r3
EXIT(hppa_call)
/*
* This is a magic branch instruction that is used by GCC's
* __canonicalize_funcptr_for_compare() function to fixup relocations
* in order to do function pointer comparisons.
*/
bl _dl_bind, rp
ENTRY(_dl_bind_start,32)
copy r3, r1
copy sp, r3
stwm r1, HPPA_FRAME_SIZE(sp)
stw rp, HPPA_FRAME_CRP(r3)
stw arg0, HPPA_FRAME_ARG(0)(r3)
stw arg1, HPPA_FRAME_ARG(1)(r3)
stw arg2, HPPA_FRAME_ARG(2)(r3)
stw arg3, HPPA_FRAME_ARG(3)(r3)
stw t1, 4(r3)
stw ret0, 8(r3)
stw ret1, 12(r3)
ldw 12(r20), arg0
copy r19, arg1
bl _dl_bind, rp
copy r21, r19
/* load &func and sl from plt entry returned */
ldw 0(ret0), r21
ldw 4(ret0), r19
ldw HPPA_FRAME_ARG(0)(r3), arg0
ldw HPPA_FRAME_ARG(1)(r3), arg1
ldw HPPA_FRAME_ARG(2)(r3), arg2
ldw HPPA_FRAME_ARG(3)(r3), arg3
ldw 4(r3), t1
ldw 8(r3), ret0
ldw 12(r3), ret1
ldw HPPA_FRAME_CRP(r3), rp
ldo HPPA_FRAME_SIZE(r3), sp
bv r0(r21)
ldwm -HPPA_FRAME_SIZE(sp), r3
EXIT(_dl_bind_start)
#define SYSCALL(x) !\
stw rp, HPPA_FRAME_ERP(sr0,sp) !\
ldil L%SYSCALLGATE, r1 !\
ble 4(sr7, r1) !\
ldi __CONCAT(SYS_,x), t1 !\
comb,<> r0, t1, _dl_sysexit !\
ldw HPPA_FRAME_ERP(sr0,sp), rp
_dl_sysexit
bv r0(rp)
sub r0, ret0, ret0
ENTRY(_dl_close,0)
SYSCALL(close)
bv r0(rp)
nop
EXIT(_dl_close)
ENTRY(_dl_exit,0)
SYSCALL(exit)
bv r0(rp)
nop
EXIT(_dl_exit)
ENTRY(_dl_issetugid,0)
SYSCALL(issetugid)
bv r0(rp)
nop
EXIT(_dl_issetugid)
ENTRY(_dl__syscall,0)
SYSCALL(__syscall)
bv r0(rp)
nop
EXIT(_dl__syscall)
ENTRY(_dl_munmap,0)
SYSCALL(munmap)
bv r0(rp)
nop
EXIT(_dl_munmap)
ENTRY(_dl_mprotect,0)
SYSCALL(mprotect)
bv r0(rp)
nop
EXIT(_dl_mprotect)
ENTRY(_dl_open,0)
SYSCALL(open)
bv r0(rp)
nop
EXIT(_dl_open)
ENTRY(_dl_read,0)
SYSCALL(read)
bv r0(rp)
nop
EXIT(_dl_read)
ENTRY(_dl_write,0)
SYSCALL(write)
bv r0(rp)
nop
EXIT(_dl_write)
ENTRY(_dl_fstat,0)
SYSCALL(fstat)
bv r0(rp)
nop
EXIT(_dl_fstat)
ENTRY(_dl_fcntl,0)
SYSCALL(fcntl)
bv r0(rp)
nop
EXIT(_dl_fcntl)
ENTRY(_dl_sysctl,0)
SYSCALL(__sysctl)
bv r0(rp)
nop
EXIT(_dl_issetugid)
ENTRY(_dl_getdirentries,0)
SYSCALL(getdirentries)
bv r0(rp)
nop
EXIT(_dl_getdirentries)
ENTRY(_dl_gettimeofday,0)
SYSCALL(gettimeofday)
bv r0(rp)
nop
EXIT(_dl_gettimeofday)
ENTRY(_dl_readlink,0)
SYSCALL(readlink)
bv r0(rp)
nop
EXIT(_dl_readlink)
ENTRY(_dl_lstat,0)
SYSCALL(lstat)
bv r0(rp)
nop
EXIT(_dl_lstat)
ENTRY(_dl_getcwd,0)
SYSCALL(__getcwd)
bv r0(rp)
nop
EXIT(_dl_getcwd)
ENTRY(_dl_sigprocmask,0)
stw arg2, HPPA_FRAME_ARG(2)(sp)
comb,<>,n r0, arg1, _dl_sigprocmask$nblock
b _dl_sigprocmask$call
ldi 1, arg0
_dl_sigprocmask$nblock
ldw 0(arg1), arg1
stw arg1, HPPA_FRAME_ARG(1)(sp)
_dl_sigprocmask$call
SYSCALL(sigprocmask)
ldw HPPA_FRAME_ARG(2)(sp), arg2
add,= r0, arg2, r0
stw ret0, 0(arg2)
bv r0(rp)
copy r0, ret0
EXIT(_dl_sigprocmask)
.end
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