lib/libthread_db/arch/mips/libpthread_md.c

   1 /*
   2  * Copyright (c) 2006-2007, Juniper Networks, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the name of Juniper Networks nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY JUNIPER NETWORKS ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/types.h>
  34 #include <sys/procfs.h>
  35 #include <ucontext.h>
  36 #include <string.h>
  37 #include <thread_db.h>
  38 #include "libpthread_db.h"
  39
  40 void
  41 pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
  42 {
  43
  44         memcpy(uc->uc_mcontext.mc_regs, &r->r_regs[ZERO],
  45             sizeof(uc->uc_mcontext.mc_regs));
  46         uc->uc_mcontext.mc_pc = r->r_regs[PC];
  47         uc->uc_mcontext.mullo = r->r_regs[MULLO];
  48         uc->uc_mcontext.mulhi = r->r_regs[MULHI];
  49 }
  50
  51 void
  52 pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
  53 {
  54         memcpy(&r->r_regs[ZERO], uc->uc_mcontext.mc_regs,
  55             sizeof(uc->uc_mcontext.mc_regs));
  56         r->r_regs[PC] = uc->uc_mcontext.mc_pc;
  57         r->r_regs[MULLO] = uc->uc_mcontext.mullo;
  58         r->r_regs[MULHI] = uc->uc_mcontext.mulhi;
  59 }
  60
  61 void
  62 pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc)
  63 {
  64
  65         memcpy(uc->uc_mcontext.mc_fpregs, r->r_regs,
  66             sizeof(uc->uc_mcontext.mc_fpregs));
  67 }
  68
  69 void
  70 pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
  71 {
  72
  73         memcpy(r->r_regs, uc->uc_mcontext.mc_fpregs,
  74             sizeof(uc->uc_mcontext.mc_fpregs));
  75 }
  76
  77 void
  78 pt_md_init(void)
  79 {
  80         /* Nothing to do */
  81 }
  82
  83 int
  84 pt_reg_sstep(struct reg *reg __unused, int step __unused)
  85 {
  86         /*
  87          * XXX: mips doesnt store single step info in any registers
  88          */
  89         return (0);
  90 }