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annotate lwasm/pragma.c @ 283:210d261a614d

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Make byte overflow detection for indexing work better There are *two* places where indexed addressing is calculated - lea style instructions and general addressing instructions. Actually check for byte overflows in both places. Also, extend byte overflow checking to all 8 bit offsets from index registers, not just PCR.
author William Astle <lost@l-w.ca>
date Mon, 02 Sep 2013 10:49:57 -0600
parents 0c4b3e8b4d0b
children 507f442dc71e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 /*
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2 pragma.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
2
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22 #include <string.h>
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23 #include <ctype.h>
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24
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25 #include <lw_string.h>
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26 #include <lw_alloc.h>
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27
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28 #include "lwasm.h"
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29 #include "instab.h"
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30 #include "input.h"
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31
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32 struct pragma_list
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33 {
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34 const char *setstr;
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35 const char *resetstr;
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36 int flag;
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37 };
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38
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39 struct pragma_stack_entry
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40 {
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41 int magic; // must always be at the start of any input stack entry
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42 int flag; // the pragma flag bit
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43 char str[1]; // magic number - this will be allocated bigger
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44 // string will be what's needed to re-instate a pragma
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45 };
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46
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47 static const struct pragma_list set_pragmas[] =
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48 {
108
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49 { "dollarnotlocal", "nodollarnotlocal", PRAGMA_DOLLARNOTLOCAL },
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b6b8c2645f5c Add back the dollarlocal and nodollarlocal pragma strings for compatibility with the documentation.
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50 { "nodollarlocal", "dollarlocal", PRAGMA_DOLLARNOTLOCAL },
108
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51 { "noindex0tonone", "index0tonone", PRAGMA_NOINDEX0TONONE },
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52 { "undefextern", "noundefextern", PRAGMA_UNDEFEXTERN },
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53 { "cescapes", "nocescapes", PRAGMA_CESCAPES },
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54 { "importundefexport", "noimportundefexport", PRAGMA_IMPORTUNDEFEXPORT },
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55 { "pcaspcr", "nopcaspcr", PRAGMA_PCASPCR },
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56 { "shadow", "noshadow", PRAGMA_SHADOW },
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57 { "nolist", "list", PRAGMA_NOLIST },
115
344cfc25afec Added initial infrastructure for pragma autobranchlength (suggested by Ebonhand on irc)
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58 { "autobranchlength", "noautobranchlength", PRAGMA_AUTOBRANCHLENGTH },
206
080bb67d84f2 Add export pragma
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59 { "export", "noexport", PRAGMA_EXPORT },
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07e1fac76321 Added pragma to allow non case sensitive symbols
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60 { "symbolnocase", "nosymbolnocase", PRAGMA_SYMBOLNOCASE },
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61 { "nosymbolcase", "symbolcase", PRAGMA_SYMBOLNOCASE },
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5d969517db74 Added condundefzero pragma
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62 { "condundefzero", "nocondundefzero", PRAGMA_CONDUNDEFZERO },
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63 { 0, 0, 0}
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64 };
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65
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66 int parse_pragma_string(asmstate_t *as, char *str, int ignoreerr)
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67 {
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68 char *p;
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69 int i;
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70 const char *np = str;
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71 int pragmas = as -> pragmas;
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72
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73 while (np)
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74 {
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75 p = lw_token(np, ',', &np);
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76 debug_message(as, 200, "Setting pragma %s", p);
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77 for (i = 0; set_pragmas[i].setstr; i++)
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78 {
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79 if (!strcasecmp(p, set_pragmas[i].setstr))
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80 {
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81 pragmas |= set_pragmas[i].flag;
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82 goto out;
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83 }
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84 if (!strcasecmp(p, set_pragmas[i].resetstr))
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85 {
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86 pragmas &= ~(set_pragmas[i].flag);
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87 goto out;
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88 }
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89 }
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90 /* unrecognized pragma here */
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91 if (!ignoreerr)
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92 {
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93 lw_free(p);
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94 return 0;
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95 }
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96 out:
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97 lw_free(p);
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98 }
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99 as -> pragmas = pragmas;
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100 return 1;
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101 }
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102
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103 PARSEFUNC(pseudo_parse_pragma)
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104 {
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105 char *ps, *t;
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106
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107 for (t = *p; *t && !isspace(*t); t++)
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108 /* do nothing */ ;
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109
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110 ps = lw_strndup(*p, t - *p);
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111 *p = t;
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112
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113 l -> len = 0;
0
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114
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115 if (parse_pragma_string(as, ps, 0) == 0)
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116 {
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117 lwasm_register_error(as, l, "Unrecognized pragma string");
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118 }
81
428068681cbf Added nolist pragma to suppress listing output of non-code generating lines
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119 if (as -> pragmas & PRAGMA_NOLIST)
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120 l -> pragmas |= PRAGMA_NOLIST;
0
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121 lw_free(ps);
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122 }
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123
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124 PARSEFUNC(pseudo_parse_starpragma)
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125 {
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126 char *ps, *t;
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8fa52c3f2970 Make *pragma work correctly
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127
0
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128 for (t = *p; *t && !isspace(*t); t++)
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129 /* do nothing */ ;
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130
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131 ps = lw_strndup(*p, t - *p);
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132 *p = t;
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133
56
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134 l -> len = 0;
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diff changeset
135
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
136 // *pragma must NEVER throw an error
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
137 parse_pragma_string(as, ps, 1);
81
428068681cbf Added nolist pragma to suppress listing output of non-code generating lines
Lost Wizard (lost@starbug3)
parents: 56
diff changeset
138 if (as -> pragmas & PRAGMA_NOLIST)
428068681cbf Added nolist pragma to suppress listing output of non-code generating lines
Lost Wizard (lost@starbug3)
parents: 56
diff changeset
139 l -> pragmas |= PRAGMA_NOLIST;
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
140 lw_free(ps);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
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141 }
108
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
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142
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lost@l-w.ca
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143 static int pragma_stack_compare(input_stack_entry *e, void *d)
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144 {
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lost@l-w.ca
parents: 85
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145 int flag = *((int *)d);
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parents: 85
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146 struct pragma_stack_entry *pse = (struct pragma_stack_entry *)e;
110
38c1537857ce Pragma stack at parse stage now works
lost@l-w.ca
parents: 108
diff changeset
147
108
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parents: 85
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148 if (pse -> flag == flag)
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lost@l-w.ca
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149 return 1;
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150 return 0;
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parents: 85
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151 }
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152
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153 PARSEFUNC(pseudo_parse_starpragmapop)
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lost@l-w.ca
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154 {
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lost@l-w.ca
parents: 85
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155 char *ps, *t;
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lost@l-w.ca
parents: 85
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156 char *pp;
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lost@l-w.ca
parents: 85
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157 int i;
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lost@l-w.ca
parents: 85
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158 const char *np;
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lost@l-w.ca
parents: 85
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159 struct pragma_stack_entry *pse;
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160
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lost@l-w.ca
parents: 85
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161 for (t = *p; *t && !isspace(*t); t++)
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parents: 85
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162 /* do nothing */ ;
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lost@l-w.ca
parents: 85
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163
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lost@l-w.ca
parents: 85
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164 ps = lw_strndup(*p, t - *p);
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parents: 85
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165 *p = t;
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166
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lost@l-w.ca
parents: 85
diff changeset
167 l -> len = 0;
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168
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169 // *pragma stuff must never throw an error
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170 np = ps;
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171
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172 while (np)
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173 {
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parents: 85
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174 pp = lw_token(np, ',', &np);
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175 for (i = 0; set_pragmas[i].setstr; i++)
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parents: 85
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176 {
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parents: 85
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177 if (!strcasecmp(pp, set_pragmas[i].setstr) || !strcasecmp(pp, set_pragmas[i].resetstr))
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178 {
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179 pse = (struct pragma_stack_entry *)input_stack_pop(as, 0x42424242, pragma_stack_compare, (void *)&(set_pragmas[i].flag));
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parents: 85
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180 if (pse)
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parents: 85
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181 {
110
38c1537857ce Pragma stack at parse stage now works
lost@l-w.ca
parents: 108
diff changeset
182 debug_message(as, 100, "Popped pragma string %s", pse->str);
108
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
183 parse_pragma_string(as, (char *)&(pse->str), 1);
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lost@l-w.ca
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184 lw_free(pse);
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parents: 85
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185 }
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parents: 85
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186 if (set_pragmas[i].flag == PRAGMA_NOLIST)
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parents: 85
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187 l -> pragmas |= PRAGMA_NOLIST;
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parents: 85
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188 }
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parents: 85
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189 }
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lost@l-w.ca
parents: 85
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190 lw_free(pp);
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lost@l-w.ca
parents: 85
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191 }
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192
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lost@l-w.ca
parents: 85
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193 lw_free(ps);
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lost@l-w.ca
parents: 85
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194 }
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parents: 85
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195
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parents: 85
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196 PARSEFUNC(pseudo_parse_starpragmapush)
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parents: 85
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197 {
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198 char *ps, *t;
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lost@l-w.ca
parents: 85
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199 char *pp;
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lost@l-w.ca
parents: 85
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200 int i;
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lost@l-w.ca
parents: 85
diff changeset
201 const char *np;
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lost@l-w.ca
parents: 85
diff changeset
202 struct pragma_stack_entry *pse;
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lost@l-w.ca
parents: 85
diff changeset
203
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parents: 85
diff changeset
204 for (t = *p; *t && !isspace(*t); t++)
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parents: 85
diff changeset
205 /* do nothing */ ;
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parents: 85
diff changeset
206
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parents: 85
diff changeset
207 ps = lw_strndup(*p, t - *p);
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lost@l-w.ca
parents: 85
diff changeset
208 *p = t;
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parents: 85
diff changeset
209
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lost@l-w.ca
parents: 85
diff changeset
210 l -> len = 0;
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diff changeset
211
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lost@l-w.ca
parents: 85
diff changeset
212 // *pragma stuff must never throw an error
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lost@l-w.ca
parents: 85
diff changeset
213 np = ps;
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lost@l-w.ca
parents: 85
diff changeset
214
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lost@l-w.ca
parents: 85
diff changeset
215 while (np)
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parents: 85
diff changeset
216 {
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parents: 85
diff changeset
217 pp = lw_token(np, ',', &np);
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lost@l-w.ca
parents: 85
diff changeset
218 for (i = 0; set_pragmas[i].setstr; i++)
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parents: 85
diff changeset
219 {
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lost@l-w.ca
parents: 85
diff changeset
220 if (!strcasecmp(pp, set_pragmas[i].setstr) || !strcasecmp(pp, set_pragmas[i].resetstr))
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lost@l-w.ca
parents: 85
diff changeset
221 {
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lost@l-w.ca
parents: 85
diff changeset
222 /* found set or reset pragma */
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lost@l-w.ca
parents: 85
diff changeset
223 /* push pragma state */
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lost@l-w.ca
parents: 85
diff changeset
224 if (as -> pragmas & (set_pragmas[i].flag))
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parents: 85
diff changeset
225 {
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lost@l-w.ca
parents: 85
diff changeset
226 /* use set string */
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lost@l-w.ca
parents: 85
diff changeset
227 t = (char *)set_pragmas[i].setstr;
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lost@l-w.ca
parents: 85
diff changeset
228 }
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lost@l-w.ca
parents: 85
diff changeset
229 else
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lost@l-w.ca
parents: 85
diff changeset
230 {
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lost@l-w.ca
parents: 85
diff changeset
231 /* use reset string */
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lost@l-w.ca
parents: 85
diff changeset
232 t = (char *)set_pragmas[i].resetstr;
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lost@l-w.ca
parents: 85
diff changeset
233 }
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lost@l-w.ca
parents: 85
diff changeset
234 pse = lw_alloc(sizeof(struct pragma_stack_entry) + strlen(t));
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lost@l-w.ca
parents: 85
diff changeset
235 pse -> flag = set_pragmas[i].flag;
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lost@l-w.ca
parents: 85
diff changeset
236 pse -> magic = 0x42424242;
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lost@l-w.ca
parents: 85
diff changeset
237 strcpy((char *)&(pse -> str), t);
110
38c1537857ce Pragma stack at parse stage now works
lost@l-w.ca
parents: 108
diff changeset
238 debug_message(as, 100, "Pushed pragma string %s", pse->str);
38c1537857ce Pragma stack at parse stage now works
lost@l-w.ca
parents: 108
diff changeset
239
108
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
240 input_stack_push(as, (input_stack_entry *)pse);
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lost@l-w.ca
parents: 85
diff changeset
241
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
242 if (set_pragmas[i].flag == PRAGMA_NOLIST)
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lost@l-w.ca
parents: 85
diff changeset
243 l -> pragmas |= PRAGMA_NOLIST;
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lost@l-w.ca
parents: 85
diff changeset
244 }
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lost@l-w.ca
parents: 85
diff changeset
245 }
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
246 lw_free(pp);
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
247 }
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
248
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
249 lw_free(ps);
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lost@l-w.ca
parents: 85
diff changeset
250 }
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
251