152 lines
5.2 KiB
ArmAsm
152 lines
5.2 KiB
ArmAsm
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/* $NetBSD: rtld_start.S,v 1.1 2003/03/25 13:11:54 scw Exp $ */
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/*
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* Copyright 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Steve C. Woodford for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#ifdef _LP64
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#define PTRSZ 8
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#else
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#define PTRSZ 4
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#endif
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#define RTLD_START_FR_R2 0x00
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#define RTLD_START_FR_R3 0x08
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#define RTLD_START_FR_R4 0x10
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#define RTLD_START_FR_R7 0x18
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#define RTLD_START_FR_R28 0x20
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#define RTLD_START_FR_CLEANUP 0x28
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#define RTLD_START_FR_OBJ (RTLD_START_FR_CLEANUP+PTRSZ)
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#define RTLD_START_FR_SIZE (RTLD_START_FR_OBJ+PTRSZ)
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ASENTRY_NOPROFILE(.rtld_start)
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addi r15, -RTLD_START_FR_SIZE, r15
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st.q r15, RTLD_START_FR_R2, r2
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st.q r15, RTLD_START_FR_R3, r3
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st.q r15, RTLD_START_FR_R4, r4
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st.q r15, RTLD_START_FR_R7, r7
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st.q r15, RTLD_START_FR_R28, r28
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pt/u datalabel _GLOBAL_OFFSET_TABLE_, tr0
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gettr tr0, r0
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pt/u datalabel _DYNAMIC, tr1
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LDPTR r0, 0, r28
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gettr tr1, r2 /* &_DYNAMIC */
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sub r2, r28, r28
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or r28, r63, r3 /* relocbase */
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pt/l _C_LABEL(_rtld_relocate_nonplt_self), tr0
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blink tr0, r18
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add r28, r63, r3 /* relocbase */
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addi r15, RTLD_START_FR_CLEANUP, r2
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pt/l _C_LABEL(_rtld), tr0
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blink tr0, r18
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ptabs/l r2, tr0
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ld.q r15, RTLD_START_FR_R2, r2 /* argc */
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ld.q r15, RTLD_START_FR_R3, r3 /* argv */
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ld.q r15, RTLD_START_FR_R4, r4 /* envp */
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ld.q r15, RTLD_START_FR_R7, r7 /* pstrings */
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ld.q r15, RTLD_START_FR_R28, r28
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LDPTR r15, RTLD_START_FR_CLEANUP, r5 /* cleanup */
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LDPTR r15, RTLD_START_FR_OBJ, r6 /* obj */
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addi r15, RTLD_START_FR_SIZE, r15
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blink tr0, r63
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.size _ASM_LABEL(.rtld_start),.-_ASM_LABEL(.rtld_start)
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#define RTLD_BIND_START_FR_R2 0x00
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#define RTLD_BIND_START_FR_R3 0x08
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#define RTLD_BIND_START_FR_R4 0x10
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#define RTLD_BIND_START_FR_R5 0x18
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#define RTLD_BIND_START_FR_R6 0x20
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#define RTLD_BIND_START_FR_R7 0x28
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#define RTLD_BIND_START_FR_R8 0x30
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#define RTLD_BIND_START_FR_R9 0x38
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#define RTLD_BIND_START_FR_DR0 0x40
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#define RTLD_BIND_START_FR_DR2 0x48
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#define RTLD_BIND_START_FR_DR4 0x50
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#define RTLD_BIND_START_FR_DR6 0x58
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#define RTLD_BIND_START_FR_DR8 0x60
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#define RTLD_BIND_START_FR_DR10 0x68
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#define RTLD_BIND_START_FR_SIZE 0x70
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/*
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* On entry:
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* r12 -> _GLOBAL_OFFSET_TABLE_ + GOT_BIAS (0x8000)
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* r17 -> Obj_Entry *
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* r21 -> reloff
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*/
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ASENTRY_NOPROFILE(_rtld_bind_start)
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LINK_FRAME(RTLD_BIND_START_FR_SIZE)
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st.q r14, RTLD_BIND_START_FR_R2, r2
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st.q r14, RTLD_BIND_START_FR_R3, r3
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st.q r14, RTLD_BIND_START_FR_R4, r4
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st.q r14, RTLD_BIND_START_FR_R5, r5
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st.q r14, RTLD_BIND_START_FR_R6, r6
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st.q r14, RTLD_BIND_START_FR_R7, r7
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st.q r14, RTLD_BIND_START_FR_R8, r8
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st.q r14, RTLD_BIND_START_FR_R9, r9
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fst.d r14, RTLD_BIND_START_FR_DR0, dr0
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fst.d r14, RTLD_BIND_START_FR_DR2, dr2
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fst.d r14, RTLD_BIND_START_FR_DR4, dr4
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fst.d r14, RTLD_BIND_START_FR_DR6, dr6
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fst.d r14, RTLD_BIND_START_FR_DR8, dr8
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fst.d r14, RTLD_BIND_START_FR_DR10, dr10
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pt/l _C_LABEL(_rtld_bind), tr0
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add r17, r63, r2
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add r21, r63, r3
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blink tr0, r18
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ptabs/l r2, tr0
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ld.q r14, RTLD_BIND_START_FR_R2, r2
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ld.q r14, RTLD_BIND_START_FR_R3, r3
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ld.q r14, RTLD_BIND_START_FR_R4, r4
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ld.q r14, RTLD_BIND_START_FR_R5, r5
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ld.q r14, RTLD_BIND_START_FR_R6, r6
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ld.q r14, RTLD_BIND_START_FR_R7, r7
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ld.q r14, RTLD_BIND_START_FR_R8, r8
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ld.q r14, RTLD_BIND_START_FR_R9, r9
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fld.d r14, RTLD_BIND_START_FR_DR0, dr0
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fld.d r14, RTLD_BIND_START_FR_DR2, dr2
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fld.d r14, RTLD_BIND_START_FR_DR4, dr4
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fld.d r14, RTLD_BIND_START_FR_DR6, dr6
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fld.d r14, RTLD_BIND_START_FR_DR8, dr8
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fld.d r14, RTLD_BIND_START_FR_DR10, dr10
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UNLINK_FRAME(RTLD_BIND_START_FR_SIZE)
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blink tr0, r63
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.size _ASM_LABEL(_rtld_bind_start),.-_ASM_LABEL(_rtld_bind_start)
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