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-rw-r--r--util/lxbios/input_file.c280
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diff --git a/util/lxbios/input_file.c b/util/lxbios/input_file.c
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--- a/util/lxbios/input_file.c
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-/*****************************************************************************\
- * input_file.c
- * $Id$
- *****************************************************************************
- * Copyright (C) 2002-2005 The Regents of the University of California.
- * Produced at the Lawrence Livermore National Laboratory.
- * Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
- * UCRL-CODE-2003-012
- * All rights reserved.
- *
- * This file is part of nvramtool, a utility for reading/writing coreboot
- * parameters and displaying information from the coreboot table.
- * For details, see http://coreboot.org/nvramtool.
- *
- * Please also read the file DISCLAIMER which is included in this software
- * distribution.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License (as published by the
- * Free Software Foundation) version 2, dated June 1991.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
- * conditions of the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
-\*****************************************************************************/
-
-#include "common.h"
-#include "input_file.h"
-#include "layout.h"
-#include "cmos_ops.h"
-#include "cmos_lowlevel.h"
-#include "reg_expr.h"
-
-static int get_input_file_line (FILE *f, char line[], int line_buf_size);
-static unsigned long long try_prepare_cmos_write (const cmos_entry_t *e,
- const char value_str[]);
-
-/* matches either a blank line or a comment line */
-static const char blank_or_comment_regex[] =
- /* a blank line */
- "(^[[:space:]]+$)"
-
- "|" /* or ... */
-
- /* a line consisting of: optional whitespace followed by */
- "(^[[:space:]]*"
- /* a '#' character and optionally, additional characters */
- "#.*$)";
-
-/* matches an assignment line */
-const char assignment_regex[] =
- /* optional whitespace */
- "^[[:space:]]*"
- /* followed by a coreboot parameter name */
- "([^[:space:]]+)"
- /* followed by optional whitespace */
- "[[:space:]]*"
- /* followed by an '=' character */
- "="
- /* followed by optional whitespace */
- "[[:space:]]*"
- /* followed by a value that may contain embedded whitespace */
- "([^[:space:]]+([[:space:]]+[^[:space:]]+)*)+"
- /* followed by optional whitespace */
- "[[:space:]]*$";
-
-static int line_num;
-
-/****************************************************************************
- * process_input_file
- *
- * Read the contents of file 'f' and return a pointer to a list of pending
- * write operations. Perform sanity checking on all write operations and
- * exit with an error message if there is a problem.
- ****************************************************************************/
-cmos_write_t * process_input_file (FILE *f)
- {
- static const int LINE_BUF_SIZE = 256;
- static const size_t N_MATCHES = 4;
- char line[LINE_BUF_SIZE];
- const char *name, *value;
- cmos_write_t *list, *item, **p;
- regex_t blank_or_comment, assignment;
- regmatch_t match[N_MATCHES];
- const cmos_entry_t *e;
-
- list = NULL;
- p = &list;
-
- compile_reg_exprs(REG_EXTENDED | REG_NEWLINE, 2, blank_or_comment_regex,
- &blank_or_comment, assignment_regex, &assignment);
-
- /* each iteration processes one line from input file */
- for (line_num = 1;
- get_input_file_line(f, line, LINE_BUF_SIZE) == OK;
- line_num++)
- { /* skip comments and blank lines */
- if (!regexec(&blank_or_comment, line, 0, NULL, 0))
- continue;
-
- /* Is this a valid assignment line? If not, then it's a syntax
- * error.
- */
- if (regexec(&assignment, line, N_MATCHES, match, 0))
- { fprintf(stderr, "%s: Syntax error on line %d of input file.\n",
- prog_name, line_num);
- exit(1);
- }
-
- /* OK, we found an assignment. Break the line into substrings
- * representing the lefthand and righthand sides of the assignment.
- */
- line[match[1].rm_eo] = '\0';
- line[match[2].rm_eo] = '\0';
- name = &line[match[1].rm_so];
- value = &line[match[2].rm_so];
-
- /* now look up the coreboot parameter name */
- if (is_checksum_name(name) || (e = find_cmos_entry(name)) == NULL)
- { fprintf(stderr, "%s: Error on line %d of input file: CMOS parameter "
- "%s not found.\n", prog_name, line_num, name);
- exit(1);
- }
-
- /* At this point, we figure out what numeric value needs to be written
- * to which location. At the same time, we perform sanity checking on
- * the write operation.
- */
-
- if ((item = (cmos_write_t *) malloc(sizeof(*item))) == NULL)
- out_of_memory();
-
- item->bit = e->bit;
- item->length = e->length;
- item->value = try_prepare_cmos_write(e, value);
-
- /* Append write operation to pending write list. */
- item->next = NULL;
- *p = item;
- p = &item->next;
- }
-
- free_reg_exprs(2, &blank_or_comment, &assignment);
- return list;
- }
-
-/****************************************************************************
- * do_cmos_writes
- *
- * 'list' is a linked list of pending CMOS write operations that have passed
- * all sanity checks. Perform all write operations, destroying the list as
- * we go.
- ****************************************************************************/
-void do_cmos_writes (cmos_write_t *list)
- { cmos_write_t *item;
-
- set_iopl(3);
-
- while (list != NULL)
- { item = list;
- list = item->next;
- cmos_write(item->bit, item->length, item->value);
- free(item);
- }
-
- cmos_checksum_write(cmos_checksum_compute());
- set_iopl(0);
- }
-
-/****************************************************************************
- * get_input_file_line
- *
- * Get a line of input from file 'f'. Store result in 'line' which is an
- * array of 'line_buf_size' bytes. Return OK on success or an error code on
- * error.
- ****************************************************************************/
-static int get_input_file_line (FILE *f, char line[], int line_buf_size)
- { switch (get_line_from_file(f, line, line_buf_size))
- { case OK:
- return OK;
-
- case LINE_EOF:
- return LINE_EOF;
-
- case LINE_TOO_LONG:
- fprintf(stderr, "%s: Error on line %d of input file: Maximum line "
- "length exceeded. Max is %d characters.\n", prog_name,
- line_num, line_buf_size - 2);
- break;
-
- default:
- BUG();
- }
-
- exit(1);
- return 1; /* keep compiler happy */
- }
-
-/****************************************************************************
- * try_prepare_cmos_write
- *
- * Attempt to convert 'value_str' to an integer representation for storage in
- * CMOS memory. On success, return the converted value. On error, exit with
- * an error message.
- ****************************************************************************/
-static unsigned long long try_prepare_cmos_write (const cmos_entry_t *e,
- const char value_str[])
- { unsigned long long value;
-
- switch (prepare_cmos_write(e, value_str, &value))
- { case OK:
- return value;
-
- case CMOS_OP_BAD_ENUM_VALUE:
- fprintf(stderr, "%s: Error on line %d of input file: Bad value for "
- "parameter %s.", prog_name, line_num, e->name);
- break;
-
- case CMOS_OP_NEGATIVE_INT:
- fprintf(stderr, "%s: Error on line %d of input file: This program "
- "does not support assignment of negative numbers to "
- "coreboot parameters.", prog_name, line_num);
- break;
-
- case CMOS_OP_INVALID_INT:
- fprintf(stderr, "%s: Error on line %d of input file: %s is not a "
- "valid integer.", prog_name, line_num, value_str);
- break;
-
- case CMOS_OP_RESERVED:
- fprintf(stderr, "%s: Error on line %d of input file: Can not modify "
- "reserved coreboot parameter %s.", prog_name, line_num,
- e->name);
- break;
-
- case CMOS_OP_VALUE_TOO_WIDE:
- fprintf(stderr, "%s: Error on line %d of input file: Can not write "
- "value %s to CMOS parameter %s that is only %d bits wide.",
- prog_name, line_num, value_str, e->name, e->length);
- break;
-
- case CMOS_OP_NO_MATCHING_ENUM:
- fprintf(stderr, "%s: coreboot parameter %s has no matching enums.",
- prog_name, e->name);
- break;
-
- case CMOS_AREA_OUT_OF_RANGE:
- fprintf(stderr, "%s: The CMOS area specified by the layout info for "
- "coreboot parameter %s is out of range.", prog_name,
- e->name);
- break;
-
- case CMOS_AREA_OVERLAPS_RTC:
- fprintf(stderr, "%s: The CMOS area specified by the layout info for "
- "coreboot parameter %s overlaps the realtime clock area.",
- prog_name, e->name);
- break;
-
- case CMOS_AREA_TOO_WIDE:
- fprintf(stderr, "%s: The CMOS area specified by the layout info for "
- "coreboot parameter %s is too wide.",
- prog_name, e->name);
- break;
-
- default:
- fprintf(stderr,
- "%s: Unknown error encountered while attempting to modify "
- "coreboot parameter %s.", prog_name, e->name);
- break;
- }
-
- fprintf(stderr, " No CMOS writes performed.\n");
- exit(1);
- return 0; /* keep compiler happy */
- }
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-01 23:59:25 +0000