From 4fde5a66b4a2b4117a45519ab0f63a9fd6bff835 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Fri, 7 Mar 2014 15:11:53 -0600 Subject: util: add rmodtool for parsing ELF files to rmodules The current implementation of creating rmodules relies on invoking the linker in a certain manner with the relocations overlaid on the BSS section. It's not really surprising that the linker doesn't always behave the way one wants depending on the linker used and the architecture. Instead, introduce rmodtool which takes an ELF file as an input, parses it, and creates a new ELF file in the format the rmodule loader expects. Change-Id: I31ac2d327d450ef841c3a7d9740b787278382bef Signed-off-by: Aaron Durbin Reviewed-on: http://review.coreboot.org/5378 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel Reviewed-by: Ronald G. Minnich --- util/cbfstool/rmodtool.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 util/cbfstool/rmodtool.c (limited to 'util/cbfstool/rmodtool.c') diff --git a/util/cbfstool/rmodtool.c b/util/cbfstool/rmodtool.c new file mode 100644 index 0000000000..1455cd9a3b --- /dev/null +++ b/util/cbfstool/rmodtool.c @@ -0,0 +1,106 @@ +/* + * cbfstool, CLI utility for creating rmodules + * + * Copyright (C) 2014 Google, Inc. + * + * 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 of the License. + * + * 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 + * 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include "common.h" +#include "rmodule.h" + +static const char *optstring = "i:o:vh?"; +static struct option long_options[] = { + {"inelf", required_argument, 0, 'i' }, + {"outelf", required_argument, 0, 'o' }, + {"verbose", no_argument, 0, 'v' }, + {"help", no_argument, 0, 'h' }, + {NULL, 0, 0, 0 } +}; + +static void usage(char *name) +{ + printf( + "rmodtool: utility for creating rmodules\n\n" + "USAGE: %s [-h] [-v] <-i|--inelf name> <-o|--outelf name>\n", + name + ); +} + +int main(int argc, char *argv[]) +{ + int c; + struct buffer elfin; + struct buffer elfout; + const char *input_file = NULL; + const char *output_file = NULL; + + if (argc < 3) { + usage(argv[0]); + return 1; + } + + while (1) { + int optindex = 0; + + c = getopt_long(argc, argv, optstring, long_options, &optindex); + + if (c == -1) + break; + + switch (c) { + case 'i': + input_file = optarg; + break; + case 'h': + usage(argv[0]); + return 1; + case 'o': + output_file = optarg; + break; + case 'v': + verbose++; + break; + default: + break; + } + } + + if (input_file == NULL || output_file == NULL) { + usage(argv[0]); + return 1; + } + + if (buffer_from_file(&elfin, input_file)) { + ERROR("Couldn't read in file '%s'.\n", input_file); + return 1; + } + + if (rmodule_create(&elfin, &elfout)) { + ERROR("Unable to create rmodule from '%s'.\n", input_file); + return 1; + } + + if (buffer_write_file(&elfout, output_file)) { + ERROR("Unable to write rmodule elf '%s'.\n", output_file); + return 1; + } + + return 0; +} -- cgit v1.2.3