1/* 2 * This file is part of ltrace. 3 * Copyright (C) 2011,2012 Petr Machata, Red Hat Inc. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation; either version 2 of the 8 * License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 18 * 02110-1301 USA 19 */ 20 21#include <stdlib.h> 22#include <string.h> 23 24#include "fetch.h" 25#include "sysdep.h" 26#include "value.h" 27#include "type.h" 28 29#ifdef ARCH_HAVE_FETCH_ARG 30struct fetch_context *arch_fetch_arg_init(enum tof type, struct process *proc, 31 struct arg_type_info *ret_info); 32 33struct fetch_context *arch_fetch_arg_clone(struct process *proc, 34 struct fetch_context *context); 35 36int arch_fetch_arg_next(struct fetch_context *ctx, enum tof type, 37 struct process *proc, struct arg_type_info *info, 38 struct value *valuep); 39 40int arch_fetch_retval(struct fetch_context *ctx, enum tof type, 41 struct process *proc, struct arg_type_info *info, 42 struct value *valuep); 43 44void arch_fetch_arg_done(struct fetch_context *context); 45 46# ifdef ARCH_HAVE_FETCH_PACK 47int arch_fetch_param_pack_start(struct fetch_context *context, 48 enum param_pack_flavor ppflavor); 49 50void arch_fetch_param_pack_end(struct fetch_context *context); 51# endif 52 53#else 54/* Fall back to gimme_arg. */ 55 56long gimme_arg(enum tof type, struct process *proc, int arg_num, 57 struct arg_type_info *info); 58 59struct fetch_context { 60 int argnum; 61}; 62 63struct fetch_context * 64arch_fetch_arg_init(enum tof type, struct process *proc, 65 struct arg_type_info *ret_info) 66{ 67 return calloc(sizeof(struct fetch_context), 1); 68} 69 70struct fetch_context * 71arch_fetch_arg_clone(struct process *proc, struct fetch_context *context) 72{ 73 struct fetch_context *ret = malloc(sizeof(*ret)); 74 if (ret == NULL) 75 return NULL; 76 return memcpy(ret, context, sizeof(*ret)); 77} 78 79int 80arch_fetch_arg_next(struct fetch_context *context, enum tof type, 81 struct process *proc, 82 struct arg_type_info *info, struct value *valuep) 83{ 84 long l = gimme_arg(type, proc, context->argnum++, info); 85 value_set_word(valuep, l); 86 return 0; 87} 88 89int 90arch_fetch_retval(struct fetch_context *context, enum tof type, 91 struct process *proc, 92 struct arg_type_info *info, struct value *valuep) 93{ 94 long l = gimme_arg(type, proc, -1, info); 95 value_set_word(valuep, l); 96 return 0; 97} 98 99void 100arch_fetch_arg_done(struct fetch_context *context) 101{ 102 free(context); 103} 104#endif 105 106#if !defined(ARCH_HAVE_FETCH_ARG) || !defined(ARCH_HAVE_FETCH_PACK) 107int 108arch_fetch_param_pack_start(struct fetch_context *context, 109 enum param_pack_flavor ppflavor) 110{ 111 return 0; 112} 113 114void 115arch_fetch_param_pack_end(struct fetch_context *context) 116{ 117} 118#endif 119 120struct fetch_context * 121fetch_arg_init(enum tof type, struct process *proc, 122 struct arg_type_info *ret_info) 123{ 124 return arch_fetch_arg_init(type, proc, ret_info); 125} 126 127struct fetch_context * 128fetch_arg_clone(struct process *proc, struct fetch_context *context) 129{ 130 return arch_fetch_arg_clone(proc, context); 131} 132 133int 134fetch_arg_next(struct fetch_context *context, enum tof type, 135 struct process *proc, 136 struct arg_type_info *info, struct value *valuep) 137{ 138 return arch_fetch_arg_next(context, type, proc, info, valuep); 139} 140 141int 142fetch_retval(struct fetch_context *context, enum tof type, 143 struct process *proc, 144 struct arg_type_info *info, struct value *valuep) 145{ 146 return arch_fetch_retval(context, type, proc, info, valuep); 147} 148 149void 150fetch_arg_done(struct fetch_context *context) 151{ 152 return arch_fetch_arg_done(context); 153} 154 155int 156fetch_param_pack_start(struct fetch_context *context, 157 enum param_pack_flavor ppflavor) 158{ 159 return arch_fetch_param_pack_start(context, ppflavor); 160} 161 162void 163fetch_param_pack_end(struct fetch_context *context) 164{ 165 return arch_fetch_param_pack_end(context); 166} 167