usr/src/lib/libc/amd64/unwind/unwind_frame.s

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26         .file   "unwind_frame.s"
  27
  28 #ifdef _LIBCRUN_
  29 #define ENTRY(x) \
  30         .text; \
  31         .align  8; \
  32         .globl  x; \
  33         .type   x, @function; \
  34         x:
  35 #define SET_SIZE(x) \
  36         .size   x, .-x
  37 #else
  38 #include "SYS.h"
  39 #endif
  40
  41 /*
  42  * ====================
  43  * _Unw_capture_regs()
  44  * --------------------
  45  *
  46  *      Given  foo()->ex_throw()->_Unwind_RaiseException()->_Unw_capture_regs()
  47  *      fills in a register array with FP and the preserved registers
  48  */
  49         ENTRY(_Unw_capture_regs)
  50         movq    %rbx,24(%rdi)           /* save preserved registers */
  51         movq    %rbp,48(%rdi)
  52         movq    %r12,96(%rdi)
  53         movq    %r13,104(%rdi)
  54         movq    %r14,112(%rdi)
  55         movq    %r15,120(%rdi)
  56         ret
  57         SET_SIZE(_Unw_capture_regs)
  58
  59 /*
  60  * ====================
  61  * _Unw_jmp
  62  * --------------------
  63  *
  64  * _Unw_jmp is passed a pc and an array of register values.
  65  */
  66
  67         ENTRY(_Unw_jmp)
  68         movq    %rdi,%r8                /* save arguments to this func */
  69         movq    %rsi,%rax
  70         movq    40(%rax),%rdi           /* set handler parameters */
  71         movq    32(%rax),%rsi
  72         movq    8(%rax),%rdx
  73         movq    16(%rax),%rcx
  74         movq    24(%rax),%rbx           /* restore preserved registers */
  75         movq    96(%rax),%r12
  76         movq    104(%rax),%r13
  77         movq    112(%rax),%r14
  78         movq    120(%rax),%r15
  79         movq    48(%rax),%rbp
  80         movq    56(%rax),%rsp
  81         movq    (%rax),%rax
  82         jmp     *%r8                    /* branch to handler */
  83         SET_SIZE(_Unw_jmp)