Module Name: src
Committed By: matt
Date: Thu Mar 6 07:47:19 UTC 2014
Added Files:
src/libexec/ld.elf_so/arch/powerpc: rtld_start64.S
Log Message:
Startup file for powerpc64. (too many difference with ppc32 to do
#ifdef dance)
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/libexec/ld.elf_so/arch/powerpc/rtld_start64.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: src/libexec/ld.elf_so/arch/powerpc/rtld_start64.S
diff -u /dev/null src/libexec/ld.elf_so/arch/powerpc/rtld_start64.S:1.1
--- /dev/null Thu Mar 6 07:47:19 2014
+++ src/libexec/ld.elf_so/arch/powerpc/rtld_start64.S Thu Mar 6 07:47:19 2014
@@ -0,0 +1,129 @@
+/* $NetBSD: rtld_start64.S,v 1.1 2014/03/06 07:47:19 matt Exp $ */
+
+/*-
+ * Copyright (C) 1998 Tsubai Masanari
+ * Portions copyright 2002 Charles M. Hannum <r...@ihack.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.
+ * 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>
+
+ .globl _rtld_relocate_nonplt_self
+ .globl _rtld
+
+ .text
+ENTRY_NOPROFILE(_rtld_start)
+ mr %r23,%r3 // argc
+ mr %r24,%r4 // argv
+ mr %r25,%r5 // envp
+/* mr %r26,%r6 // obj (always 0) */
+/* mr %r27,%r7 // cleanup (always 0) */
+ mr %r28,%r8 // ps_strings
+ li %r0,0
+ stdu %r0,-64(%r1) // terminate stack chain
+ std %r2,40(%r1) // save TOC
+ std %r0,16(%r1) // ditto
+
+ bcl 20,31,1f
+1: mflr %r30
+ ld %r3,0(%r2) // TOC[0] = &TOC
+ sub %r29,%r2,%r3 // compute relocbase
+
+ addis %r3,%r3,_DYNAMIC-1b@ha // get _DYNAMIC actual address
+ addi %r3,%r3,_DYNAMIC-1b@l
+ mr %r4,%r29 // r4 = relocbase
+ CALL(_rtld_relocate_nonplt_self)
+
+ addi %r3,%r1,48 // sp = <local variable space>
+ mr %r4,%r29 // r4 = relocbase
+ CALL(_rtld) // _start = _rtld(sp, relocbase)
+
+ ld %r0,0(%r3) // func address
+ ld %r2,8(%r3) // TOC address
+ ld %r11,16(%r3) // environment pointer
+ mtctr %r0 // so we can call it.
+
+ mr %r3,%r23 // argc
+ mr %r4,%r24 // argv
+ mr %r5,%r25 // envp
+ ld %r6,56(%r1) // obj = <localvar>[1]
+ ld %r7,48(%r1) // cleanup = <localvar>[0]
+ mr %r8,%r28 // ps_strings
+
+ bctrl // _start(argc, argv, envp, obj, cleanup, ps_strings)
+ nop
+
+ li %r0,1 // _exit()
+ sc
+END(_rtld_start)
+
+ .globl _rtld_bind
+
+/*
+ * %r0 has the index of the rela, %r12 has a pointer to the plt entry.
+ */
+ENTRY_NOPROFILE(_rtld_bind_start)
+ std %r3,-72(%r1) // save argument register
+ std %r4,-64(%r1) // save argument register
+ std %r5,-56(%r1) // save argument register
+ std %r6,-48(%r1) // save argument register
+ std %r7,-40(%r1) // save argument register
+ std %r8,-32(%r1) // save argument register
+ std %r9,-24(%r1) // save argument register
+ std %r10,-16(%r1) // save argument register
+ std %r31,-8(%r1) // save register
+ stdu %r1,-(48+80)(%r1) // create back chain
+ mflr %r10
+ std %r10,16(%r1) // save LR
+ mfcr %r9
+ std %r9,8(%r1) // save CR to be safe
+
+ mr %r31, %r12 // save this across bind call
+ mr %r3, %r11 // obj
+ mr %r4, %r0 // reloff
+
+ CALL(_rtld_bind) // _rtld_bind(obj, reloff)
+
+ mtctr %r3
+ ld %r2,8(%r31) // load TOC for function
+ ld %r11,16(%r31) // load env ptr for function.
+
+ ld %r0,8(%r1) // get saved CR
+ mtcr %r0 // restore it
+ ld %r0,16(%r1) // get saved LR
+ mtlr %r0 // restore it
+
+ addi %r1,%r1,(48+80) // adjust stack
+ ld %r3,-72(%r1) // restore argument register
+ ld %r4,-64(%r1) // restore argument register
+ ld %r5,-56(%r1) // restore argument register
+ ld %r6,-48(%r1) // restore argument register
+ ld %r7,-40(%r1) // restore argument register
+ ld %r8,-32(%r1) // restore argument register
+ ld %r9,-24(%r1) // restore argument register
+ ld %r10,-16(%r1) // restore argument register
+ ld %r31,-8(%r1) // restore register
+ bctr
+END(_rtld_bind_start)
