Sol Boucher | 69b88bf | 2015-02-26 11:47:19 -0800 | [diff] [blame] | 1 | /* |
| 2 | * fmd_parser.y, parser generator for flashmap descriptor language |
| 3 | * |
| 4 | * Copyright (C) 2015 Google, Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
Sol Boucher | 69b88bf | 2015-02-26 11:47:19 -0800 | [diff] [blame] | 14 | */ |
| 15 | |
| 16 | %{ |
| 17 | #include "fmd_scanner.h" |
Sol Boucher | b974081 | 2015-03-18 10:13:48 -0700 | [diff] [blame] | 18 | #include "common.h" |
Sol Boucher | 69b88bf | 2015-02-26 11:47:19 -0800 | [diff] [blame] | 19 | |
| 20 | #include <stdlib.h> |
| 21 | |
| 22 | struct flashmap_descriptor *res = NULL; |
| 23 | %} |
| 24 | |
| 25 | %union { |
| 26 | unsigned intval; |
| 27 | char *strval; |
| 28 | struct unsigned_option maybe_intval; |
| 29 | struct flashmap_descriptor *region_ptr; |
| 30 | struct descriptor_list region_listhdr; |
| 31 | } |
| 32 | |
| 33 | %code requires { |
| 34 | #include "fmd.h" |
| 35 | #include "option.h" |
| 36 | |
| 37 | #include <stdbool.h> |
| 38 | |
| 39 | struct descriptor_node { |
| 40 | struct flashmap_descriptor *val; |
| 41 | struct descriptor_node *next; |
| 42 | }; |
| 43 | |
| 44 | struct descriptor_list { |
| 45 | size_t len; |
| 46 | struct descriptor_node *head; |
| 47 | struct descriptor_node *tail; |
| 48 | }; |
| 49 | |
| 50 | extern struct flashmap_descriptor *res; |
| 51 | |
| 52 | struct flashmap_descriptor *parse_descriptor(char *name, |
| 53 | struct unsigned_option offset, struct unsigned_option size, |
| 54 | struct descriptor_list children); |
| 55 | void yyerror(const char *s); |
| 56 | } |
| 57 | |
| 58 | %token <intval> INTEGER |
| 59 | %token OCTAL |
| 60 | %token <strval> STRING |
| 61 | |
| 62 | %type <region_ptr> flash_region |
| 63 | %type <strval> region_name |
| 64 | %type <strval> region_annotation_opt |
| 65 | %type <strval> region_annotation |
| 66 | %type <maybe_intval> region_offset_opt |
| 67 | %type <maybe_intval> region_offset |
| 68 | %type <maybe_intval> region_size_opt |
| 69 | %type <maybe_intval> region_size |
| 70 | %type <region_listhdr> region_list_opt |
| 71 | %type <region_listhdr> region_list |
| 72 | %type <region_listhdr> region_list_entries |
| 73 | |
| 74 | %% |
| 75 | |
| 76 | flash_chip: region_name region_offset_opt region_size region_list |
| 77 | { |
| 78 | if (!(res = parse_descriptor($1, $2, $3, $4))) |
| 79 | YYABORT; |
| 80 | }; |
| 81 | flash_region: region_name region_annotation_opt region_offset_opt |
| 82 | region_size_opt region_list_opt |
| 83 | { |
| 84 | struct flashmap_descriptor *node = parse_descriptor($1, $3, $4, $5); |
| 85 | if (!node) |
| 86 | YYABORT; |
| 87 | |
| 88 | char *annotation = $2; |
| 89 | if (annotation && !fmd_process_annotation_impl(node, annotation)) { |
Sol Boucher | b974081 | 2015-03-18 10:13:48 -0700 | [diff] [blame] | 90 | ERROR("Section '%s' has unexpected annotation '(%s)'\n", |
Sol Boucher | 69b88bf | 2015-02-26 11:47:19 -0800 | [diff] [blame] | 91 | node->name, annotation); |
| 92 | YYABORT; |
| 93 | } |
| 94 | free(annotation); |
| 95 | |
| 96 | $$ = node; |
| 97 | }; |
| 98 | region_name: STRING |
| 99 | { |
| 100 | if (!$1) { |
Sol Boucher | b974081 | 2015-03-18 10:13:48 -0700 | [diff] [blame] | 101 | perror("E: While allocating section name"); |
Sol Boucher | 69b88bf | 2015-02-26 11:47:19 -0800 | [diff] [blame] | 102 | YYABORT; |
| 103 | } |
| 104 | }; |
| 105 | region_annotation_opt: { $$ = NULL; } |
| 106 | | region_annotation; |
| 107 | region_annotation: '(' STRING ')' { $$ = $2; }; |
| 108 | region_offset_opt: { $$ = (struct unsigned_option){false, 0}; } |
| 109 | | region_offset; |
| 110 | region_offset: '@' INTEGER { $$ = (struct unsigned_option){true, $2}; }; |
| 111 | region_size_opt: { $$ = (struct unsigned_option){false, 0}; } |
| 112 | | region_size; |
| 113 | region_size: INTEGER { $$ = (struct unsigned_option){true, $1}; }; |
| 114 | region_list_opt: |
| 115 | { |
| 116 | $$ = (struct descriptor_list) |
| 117 | {.len = 0, .head = NULL, .tail = NULL}; |
| 118 | } |
| 119 | | region_list; |
| 120 | region_list: '{' region_list_entries '}' { $$ = $2; }; |
| 121 | region_list_entries: flash_region |
| 122 | { |
| 123 | struct descriptor_node *node = malloc(sizeof(*node)); |
| 124 | if (!node) { |
Sol Boucher | b974081 | 2015-03-18 10:13:48 -0700 | [diff] [blame] | 125 | perror("E: While allocating linked list node"); |
Sol Boucher | 69b88bf | 2015-02-26 11:47:19 -0800 | [diff] [blame] | 126 | YYABORT; |
| 127 | } |
| 128 | node->val = $1; |
| 129 | node->next = NULL; |
| 130 | $$ = (struct descriptor_list){.len = 1, .head = node, .tail = node}; |
| 131 | } |
| 132 | | region_list_entries flash_region |
| 133 | { |
| 134 | struct descriptor_node *node = malloc(sizeof(*node)); |
| 135 | if (!node) { |
Sol Boucher | b974081 | 2015-03-18 10:13:48 -0700 | [diff] [blame] | 136 | perror("E: While allocating linked list node"); |
Sol Boucher | 69b88bf | 2015-02-26 11:47:19 -0800 | [diff] [blame] | 137 | YYABORT; |
| 138 | } |
| 139 | node->val = $2; |
| 140 | node->next = NULL; |
| 141 | |
| 142 | $1.tail->next = node; |
| 143 | $$ = (struct descriptor_list) |
| 144 | {.len = $1.len + 1, .head = $1.head, .tail = node}; |
| 145 | }; |
| 146 | |
| 147 | %% |
| 148 | |
| 149 | struct flashmap_descriptor *parse_descriptor(char *name, |
| 150 | struct unsigned_option offset, struct unsigned_option size, |
| 151 | struct descriptor_list children) |
| 152 | { |
| 153 | struct flashmap_descriptor *region = malloc(sizeof(*region)); |
| 154 | if (!region) { |
Sol Boucher | b974081 | 2015-03-18 10:13:48 -0700 | [diff] [blame] | 155 | perror("E: While allocating descriptor section"); |
Sol Boucher | 69b88bf | 2015-02-26 11:47:19 -0800 | [diff] [blame] | 156 | return NULL; |
| 157 | } |
| 158 | region->name = name; |
| 159 | region->offset_known = offset.val_known; |
| 160 | region->offset = offset.val; |
| 161 | region->size_known = size.val_known; |
| 162 | region->size = size.val; |
| 163 | region->list_len = children.len; |
| 164 | if (region->list_len) { |
| 165 | region->list = malloc(region->list_len * sizeof(*region->list)); |
| 166 | if (!region->list) { |
Sol Boucher | b974081 | 2015-03-18 10:13:48 -0700 | [diff] [blame] | 167 | perror("E: While allocating node children array"); |
Sol Boucher | 69b88bf | 2015-02-26 11:47:19 -0800 | [diff] [blame] | 168 | return NULL; |
| 169 | } |
| 170 | struct descriptor_node *cur_node = children.head; |
| 171 | for (unsigned idx = 0; idx < region->list_len; ++idx) { |
| 172 | region->list[idx] = cur_node->val; |
| 173 | |
| 174 | struct descriptor_node *next_node = cur_node->next; |
| 175 | free(cur_node); |
| 176 | cur_node = next_node; |
| 177 | } |
| 178 | } else { |
| 179 | region->list = NULL; |
| 180 | } |
| 181 | return region; |
| 182 | } |
| 183 | |
| 184 | void yyerror(const char *s) |
| 185 | { |
| 186 | fprintf(stderr, "%s\n", s); |
| 187 | } |