external/bsd/pcc/dist/pcc-libs/csu/darwin/powerpc/dylib1.c

   1 /*      $Id: dylib1.c,v 1.1.1.1 2009/09/04 00:27:35 gmcgarry Exp $      */
   2 /*-
   3  * Copyright (c) 2009 Gregory McGarry <g.mcgarry@ieee.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "common.h"
  19
  20 asm(
  21         "       .text\n"
  22         "       .section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32"
  23 );
  24
  25 /*
  26  *  void _dyld_func_lookup(const char *, void **);
  27  *
  28  *  jump to the linker via the pointer in the __dyld section
  29  */
  30 asm(
  31         "       .text\n"
  32         "       .p2align 2\n"
  33         "       .private_extern __dyld_func_lookup\n"
  34         "__dyld_func_lookup:\n"
  35         "       mflr r0\n"
  36         "       bcl 20,31,L__dyld_func_lookup$pb\n"
  37         "L__dyld_func_lookup$pb:\n"
  38         "       mflr r11\n"
  39         "       mtlr r0\n"
  40         "       addis r11,r11,ha16(Ldyld_func_lookup-L__dyld_func_lookup$pb)\n"
  41         "       lwz r11,lo16(Ldyld_func_lookup-L__dyld_func_lookup$pb)(r11)\n"
  42         "       mtctr r11\n"
  43         "       bctr\n"
  44 );
  45
  46 /*
  47  *  void dyld_stub_binding_helper(void)
  48  */
  49 asm(
  50         "       .data\n"
  51         "       .p2align 2\n"
  52         "dyld__mach_header:\n"
  53         "       .long __mh_dylib_header\n"
  54         "       .text\n"
  55         "       .p2align 2\n"
  56         "       .private_extern dyld_stub_binding_helper\n"
  57         "dyld_stub_binding_helper:\n"
  58         "       mflr r0\n"
  59         "       bcl 20,31,Ldyld_stub_binding_helper$pb\n"
  60         "Ldyld_stub_binding_helper$pb:\n"
  61         "       mflr r12\n"
  62         "       mtlr r0\n"
  63         "       mr r0,r12\n"
  64         "       addis r12,r12,ha16(Ldyld_lazy_binder-Ldyld_stub_binding_helper$pb)\n"
  65         "       lwz r12,lo16(Ldyld_lazy_binder-Ldyld_stub_binding_helper$pb)(r12)\n"
  66         "       mtctr r12\n"
  67         "       mr r12,r0\n"
  68         "       addis r12,r12,ha16(dyld__mach_header-Ldyld_stub_binding_helper$pb)\n"
  69         "       lwz r12,lo16(dyld__mach_header-Ldyld_stub_binding_helper$pb)(r12)\n"
  70         "       bctr\n"
  71 );
  72
  73 /*
  74  * __dyld section
  75  */
  76 asm(
  77         "       .dyld\n"
  78         "       .p2align 2\n"
  79         "Ldyld_lazy_binder:\n"
  80         "       .long 0x8fe01000\n"
  81         "Ldyld_func_lookup:\n"
  82         "       .long 0x8fe01008\n"
  83
  84 );
  85
  86 asm("\t.subsections_via_symbols\n");
  87
  88 IDENT("$Id: dylib1.c,v 1.1.1.1 2009/09/04 00:27:35 gmcgarry Exp $");