diff options
Diffstat (limited to 'libexec/rtld-elf/alpha/rtld_start.S')
| -rw-r--r-- | libexec/rtld-elf/alpha/rtld_start.S | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/libexec/rtld-elf/alpha/rtld_start.S b/libexec/rtld-elf/alpha/rtld_start.S deleted file mode 100644 index 8ab7605..0000000 --- a/libexec/rtld-elf/alpha/rtld_start.S +++ /dev/null @@ -1,211 +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 <machine/pal.h> - -.extern _GLOBAL_OFFSET_TABLE_ -.extern _GOT_END_ - -LEAF(_rtld_start, 0) /* XXX */ - .set noreorder - br pv, $33 -$33: LDGP(pv) - - /* save away the stack pointer */ - - lda s0, 0(sp) /* get argc from stack */ - lda sp, -16(sp) /* space for arguments */ - - /* save ps_strings pointer */ - mov a3, s1 - - /* Step 1 -- Figure out the displacement */ - - br t2, $34 /* get our PC */ -$34: ldiq t3, $34 /* get where the linker thought we were */ - subq t2, t3, t8 /* calculate the displacement */ - - - /* Step 2 -- Find bounds of global offset table */ - - lda t5, _GLOBAL_OFFSET_TABLE_ - addq t8, t5, t9 /* add the displacement */ - lda t4, _GOT_END_ - addq t8, t4, t10 /* add the displacement */ - - /* - * Step 3 -- Every entry in the global offset table needs to - * modified for the displacement before any code will work. - */ - -$35: ldq t1, 0(t9) /* load the value */ - addq t8, t1, t1 /* add the displacement */ - stq t1, 0(t9) /* save the new value */ - lda t9, 8(t9) /* point to next entry */ - cmpult t9, t10, t1 /* are we done? */ - bne t1, $35 /* no, do more */ - - /* - * Ya! Things are far enough so we can do some dynamic linking! - */ - - lda a0, 0(s0) /* initial sp */ - lda a1, -16(s0) /* address for exit proc */ - lda a2, -8(s0) /* address for obj_main */ - CALL(_rtld) /* v0 = _rtld(sp, &exit_proc, &obj_main); */ - - ldq a1, -16(s0) /* our atexit function */ - ldq a2, -8(s0) /* obj_main entry */ - lda sp, 16(sp) /* readjust our stack */ - mov s0, a0 /* stack pointer */ - mov s1, a3 /* ps_strings pointer */ - mov v0, pv - jsr ra, (v0), 0 /* (*_start)(sp, cleanup, obj); */ - ldgp gp, 0(ra) - - CALL(exit) - halt -END(_rtld_start) - -#define RTLD_BIND_START_PROLOGUE \ - /* at_reg already used by PLT code. */ \ - .set noat ; \ - \ - /* \ - * Allocate stack frame and preserve all registers that the \ - * caller would have normally saved themselves. \ - */ \ - lda sp, -168(sp) ; \ - stq ra, 0(sp) ; \ - stq v0, 8(sp) ; \ - stq t0, 16(sp) ; \ - stq t1, 24(sp) ; \ - stq t2, 32(sp) ; \ - stq t3, 40(sp) ; \ - stq t4, 48(sp) ; \ - stq t5, 56(sp) ; \ - stq t6, 64(sp) ; \ - stq t7, 72(sp) ; \ - stq a0, 80(sp) ; \ - stq a1, 88(sp) ; \ - stq a2, 96(sp) ; \ - stq a3, 104(sp) ; \ - stq a4, 112(sp) ; \ - stq a5, 120(sp) ; \ - stq t8, 128(sp) ; \ - stq t9, 136(sp) ; \ - stq t10, 144(sp) ; \ - stq t11, 152(sp) ; \ - stq gp, 160(sp) ; \ - \ - /* \ - * Load our global pointer. Note, can't use pv, since it is \ - * already used by the PLT code. \ - */ \ - br t0, 1f ; \ -1: LDGP(t0) - -#define RTLD_BIND_START_EPILOGUE \ - /* Move the destination address into position. */ \ - mov v0, pv ; \ - \ - /* Restore program registers. */ \ - ldq ra, 0(sp) ; \ - ldq v0, 8(sp) ; \ - ldq t0, 16(sp) ; \ - ldq t1, 24(sp) ; \ - ldq t2, 32(sp) ; \ - ldq t3, 40(sp) ; \ - ldq t4, 48(sp) ; \ - ldq t5, 56(sp) ; \ - ldq t6, 64(sp) ; \ - ldq t7, 72(sp) ; \ - ldq a0, 80(sp) ; \ - ldq a1, 88(sp) ; \ - ldq a2, 96(sp) ; \ - ldq a3, 104(sp) ; \ - ldq a4, 112(sp) ; \ - ldq a5, 120(sp) ; \ - ldq t8, 128(sp) ; \ - ldq t9, 136(sp) ; \ - ldq t10, 144(sp) ; \ - ldq t11, 152(sp) ; \ - ldq gp, 160(sp) ; \ - /* XXX LDGP? */ \ - \ - /* \ - * We've patched the PLT; sync the I-stream. \ - */ \ - imb ; \ - \ - /* Pop the stack frame and turn control to the destination. */ \ - lda sp, 168(sp) ; \ - jmp zero, (pv) - - -/* - * Lazy binding entry point, called via PLT. - */ -NESTED_NOPROFILE(_rtld_bind_start, 0, 168, ra, 0, 0) - - RTLD_BIND_START_PROLOGUE - - /* Set up the arguments for _rtld_bind. */ - subq at_reg, pv, a1 /* calculate reloc offset */ - ldq a0, 8(pv) /* object structure */ - subq a1, 20, a1 /* = (at - t11 - 20) / 12 * 24 */ - addq a1, a1, a1 - - CALL(_rtld_bind) - - RTLD_BIND_START_EPILOGUE - -END(_rtld_bind_start) - -/* - * Lazy binding entry point, called via PLT. This version is for the - * old PLT entry format. - */ -NESTED_NOPROFILE(_rtld_bind_start_old, 0, 168, ra, 0, 0) - - RTLD_BIND_START_PROLOGUE - - /* Set up the arguments for _rtld_bind. */ - ldq a0, 8(pv) /* object structure */ - mov at_reg, a1 /* offset of reloc entry */ - - CALL(_rtld_bind) - - RTLD_BIND_START_EPILOGUE - -END(_rtld_bind_start_old) - |
