diff options
Diffstat (limited to 'libexec/rtld-elf/ia64/rtld_start.S')
| -rw-r--r-- | libexec/rtld-elf/ia64/rtld_start.S | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/libexec/rtld-elf/ia64/rtld_start.S b/libexec/rtld-elf/ia64/rtld_start.S deleted file mode 100644 index f41e5e5..0000000 --- a/libexec/rtld-elf/ia64/rtld_start.S +++ /dev/null @@ -1,252 +0,0 @@ -/* $FreeBSD$ */ -/* From: NetBSD: rtld_start.S,v 1.1 1996/12/16 20:38:09 cgd Exp */ - -/* - * Copyright 1996 Matt Thomas <matt@3am-software.com> - * Copyright 2000 John D. Polstra - * 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. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * 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. - */ - -#include <machine/asm.h> -#include <sys/syscall.h> - -ENTRY(_rtld_start, 0) - alloc r2=ar.pfs,3,0,3,0 - ;; -1: mov r14=ip // calculate gp - addl r3=@gprel(1b),r0 - ;; - sub gp=r14,r3 - ;; - .section .sdata -2: data4 @ltv(1b) // unrelocated address of 1b - .align 8 - .previous - add r15=@gprel(2b),gp - ;; - ld8 r15=[r15] - ;; - sub out0=r14,r15 // out0 is image base address - br.call.sptk.many rp=_rtld_reloc // fixup image - - add sp=-16,sp // 16 bytes for us, 16 for _rtld - ;; - mov out0=in0 - add out1=16,sp // address for exit proc - add out2=24,sp // address for obj_main - - br.call.sptk.many rp=_rtld // r8=_rtld(sp, &exit_proc, &obj_main) - - add r16=16,sp // address for exit proc - ;; - ld8 r15=[r16] // read exit proc - add sp=16,sp // readjust stack - mov b7=r8 // address of real _start - ;; - alloc r2=ar.pfs,0,0,3,0 // dump register frame - mov out2=r15 - ;; - br.call.sptk.many rp=b7 // transfer to main program - br.call.sptk.many rp=exit // die -END(_rtld_start) - -/* - * _rtld_bind_start: lookup a lazy binding and transfer to real target - * - * Arguments: - * r1 gp value for rtld - * r15 Index in plt - * r16 Obj_Entry of caller - * in0-in7 Arguments for target procedure - * rp Return address back to caller - */ -ENTRY(_rtld_bind_start, 0) -{ .mii - alloc loc0=ar.pfs,8,6,3,0 // space to save r8-r11 - add r17=16-8*16,sp // leave 16 bytes for _rtld_bind - add r18=32-8*16,sp - ;; -} { .mii - mov loc2=r8 // structure return address - add sp=-8*16,sp // space to save f8-f15 - mov loc1=rp - ;; -} { .mii - stf.spill [r17]=f8,32 // save float arguments - mov loc3=r9 // language specific - mov loc4=r10 // language specific -} { .mii - stf.spill [r18]=f9,32 - mov loc5=r11 // language specific - shl out1=r15,4 // 16 * index - ;; -} { .mmi - stf.spill [r17]=f10,32 - stf.spill [r18]=f11,32 - mov out0=r16 // Obj_Entry for caller - ;; -} { .mmi - stf.spill [r17]=f12,32 - stf.spill [r18]=f13,32 - shladd out1=r15,3,out1 // rela offset = 24 * index - ;; -} { .mmb - stf.spill [r17]=f14,32 - stf.spill [r18]=f15,32 - br.call.sptk.many rp=_rtld_bind -} { .mii - ld8 r14=[r8],8 // target address - add r17=16,sp - add r18=32,sp - ;; -} { .mii - ld8 r1=[r8] // target gp - mov ar.pfs=loc0 // clean up - mov rp=loc1 -} { .mmi - ldf.fill f8=[r17],32 // restore float arguments - ldf.fill f9=[r18],32 - mov r8=loc2 // restore structure pointer - ;; -} { .mmi - ldf.fill f10=[r17],32 - ldf.fill f11=[r18],32 - mov r9=loc3 - ;; -} { .mmi - ldf.fill f12=[r17],32 - ldf.fill f13=[r18],32 - mov r10=loc4 - ;; -} { .mmi - ldf.fill f14=[r17],32 - ldf.fill f15=[r18],32 - mov r11=loc5 - ;; -} { .mii - nop.m 0 - mov b7=r14 - add sp=8*16,sp - ;; -} { .mib - alloc r14=ar.pfs,0,0,8,0 // drop our register frame - nop.i 0 - br.sptk.many b7 // jump to target -} -END(_rtld_bind_start) - -#define DT_NULL 0 /* Terminating entry. */ -#define DT_RELA 7 /* Address of ElfNN_Rela relocations. */ -#define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */ -#define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */ - -#define R_IA_64_NONE 0 /* None */ -#define R_IA_64_DIR64LSB 0x27 /* word64 LSB S + A */ -#define R_IA_64_REL64LSB 0x6f /* word64 LSB BD + A */ - -/* - * _rtld_reloc: relocate the rtld image, apart from @fptrs. - * - * Assumes that rtld was linked at zero and that we only need to - * handle REL64LSB and DIR64LSB relocations. - * - * Arguments: - * r1 gp value for rtld - * in0 rtld base address - */ -STATIC_ENTRY(_rtld_reloc, 1) - alloc loc0=ar.pfs,1,2,0,0 - mov loc1=rp - ;; - movl r15=@gprel(_DYNAMIC) // find _DYNAMIC etc. - ;; - add r15=r15,gp // relocate _DYNAMIC etc. - ;; -1: ld8 r16=[r15],8 // read r15->d_tag - ;; - ld8 r17=[r15],8 // and r15->d_val - ;; - cmp.eq p6,p0=DT_NULL,r16 // done? -(p6) br.cond.dpnt.few 2f - ;; - cmp.eq p6,p0=DT_RELA,r16 - ;; -(p6) add r18=r17,in0 // found rela section - ;; - cmp.eq p6,p0=DT_RELASZ,r16 - ;; -(p6) mov r19=r17 // found rela size - ;; - cmp.eq p6,p0=DT_RELAENT,r16 - ;; -(p6) mov r22=r17 // found rela entry size - ;; - br.sptk.few 1b - -2: - ld8 r15=[r18],8 // read r_offset - ;; - ld8 r16=[r18],8 // read r_info - add r15=r15,in0 // relocate r_offset - ;; - ld8 r17=[r18],8 // read r_addend - sub r19=r19,r22 // update relasz - - extr.u r23=r16,0,32 // ELF64_R_TYPE(r16) - ;; - cmp.eq p6,p0=R_IA_64_NONE,r23 -(p6) br.cond.dpnt.few 3f - ;; - cmp.eq p6,p0=R_IA_64_DIR64LSB,r23 - ;; -(p6) br.cond.dptk.few 4f - ;; - cmp.eq p6,p0=R_IA_64_REL64LSB,r23 - ;; -(p6) br.cond.dptk.few 4f - ;; - -3: cmp.ltu p6,p0=0,r19 // more? -(p6) br.cond.dptk.few 2b // loop - - mov r8=0 // success return value - ;; - br.cond.sptk.few 9f // done - -4: - ld8 r16=[r15] // read value - ;; - add r16=r16,in0 // relocate it - ;; - st8 [r15]=r16 // and store it back - br.cond.sptk.few 3b - -9: - mov ar.pfs=loc0 - mov rp=loc1 - ;; - br.ret.sptk.few rp - -END(_rtld_reloc) |
