FreeCalypso > hg > freecalypso-tools
view rvinterf/ctracedec/decode.c @ 416:30f6d1c32c6f
doc/Flash-boot-defect article removed (no longer relevant)
This article is no longer relevant because the issue in question
only affected one (1) defective FCDEV3B board which was not
and never will be sold.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 26 Oct 2018 07:11:08 +0000 |
parents | e7502631a0f9 |
children |
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/* * This module implements the actual decoding of compressed traces. */ #include <sys/types.h> #include <stdio.h> #include <ctype.h> #include <string.h> #include <strings.h> #include <stdlib.h> extern char *str2ind_tab_filename; extern int str2ind_array_size; extern char **str2ind_orig_strings; extern char **str2ind_param_strings; #define MAX_PRINTF_PARAMS 16 static int cindex, cindex_nchars; static u_char param_bytes_array[256]; static int param_bytes_count; static char *format_string, *param_type_string; static int num_printf_params; static u_long printf_params[MAX_PRINTF_PARAMS]; static char output_buf[2048]; decode_hex_digit(c) { if (isdigit(c)) return(c - '0'); else if (isupper(c)) return(c - 'A' + 10); else return(c - 'a' + 10); } static int decode_idx_and_params(line) char *line; { char *cp; u_char *dp; for (cp = line; isdigit(*cp); cp++) ; if (*cp && *cp != ' ') return(-1); cindex = atoi(line); cindex_nchars = cp - line; for (dp = param_bytes_array; *cp; ) { if (*cp++ != ' ') return(-1); if (!isxdigit(cp[0]) || !isxdigit(cp[1])) return(-1); *dp++ = decode_hex_digit(cp[0]) << 4 | decode_hex_digit(cp[1]); cp += 2; } param_bytes_count = dp - param_bytes_array; return(0); } static void decode_parameters(filename_for_errs, lineno_for_errs) char *filename_for_errs; { int pi, type; u_char *bp, *endp; bp = param_bytes_array; endp = bp + param_bytes_count; for (pi = 0; pi < num_printf_params; pi++) { type = param_type_string[pi]; switch (type) { case 'c': if (bp >= endp) { wrong_param_byte_count: fprintf(stderr, "%s line %d: wrong number of parameter bytes for %s entry #%d\n", filename_for_errs, lineno_for_errs, str2ind_tab_filename, cindex); exit(1); } printf_params[pi] = *bp++; continue; case 'i': case 'p': case '*': if (bp > endp - 4) goto wrong_param_byte_count; printf_params[pi] = (u_long) bp[0] | (u_long) bp[1] << 8 | (u_long) bp[2] << 16 | (u_long) bp[3] << 24; bp += 4; continue; case 's': printf_params[pi] = (u_long) bp; for (;;) { if (bp >= endp) { fprintf(stderr, "%s line %d: unterminated string parameter in compressed trace\n", filename_for_errs, lineno_for_errs); exit(1); } if (!*bp++) break; } continue; default: fprintf(stderr, "%s entry #%d: parameter type \'%c\' not supported\n", str2ind_tab_filename, cindex, type); exit(1); } } if (bp != endp) goto wrong_param_byte_count; } process_ctrace_line(line, cindex_offset, filename_for_errs, lineno_for_errs) char *line, *filename_for_errs; { if (decode_idx_and_params(line + cindex_offset) < 0) { fprintf(stderr, "%s line %d: unable to decode compressed trace line\n", filename_for_errs, lineno_for_errs); exit(1); } if (cindex >= str2ind_array_size) { fprintf(stderr, "%s line %d: index %d exceeds the range of %s\n", filename_for_errs, lineno_for_errs, cindex, str2ind_tab_filename); exit(1); } format_string = str2ind_orig_strings[cindex]; param_type_string = str2ind_param_strings[cindex]; num_printf_params = strlen(param_type_string); if (num_printf_params > MAX_PRINTF_PARAMS) { fprintf(stderr, "error: entry #%d in %s has too many parameters\n", cindex, str2ind_tab_filename); exit(1); } decode_parameters(filename_for_errs, lineno_for_errs); ind2str_doprnt(format_string, printf_params, output_buf); printf("%.*s \"%s\"\n", cindex_offset + cindex_nchars, line, output_buf); return(0); }