Add a little BIOS dumper program.

This isn't actually tested yet as libpciaccess doesn't do rom access on
non-linux yet.

src/bios_reader/.gitignore

@@ -1 +1,2 @@
+bios_dumper
 bios_reader

src/bios_reader/Makefile.am

@@ -1,4 +1,13 @@
 AM_CFLAGS = @XORG_CFLAGS@ @XMODES_CFLAGS@
 
-noinst_PROGRAMS = bios_reader
+noinst_PROGRAMS = bios_reader  $(BIOS_DUMPER)
 
+if HAVE_PCIACCESS
+BIOS_DUMPER = bios_dumper
+
+bios_dumper_SOURCES = bios_dumper.c
+
+bios_dumper_CFLAGS = $(PCIACCESS_CFLAGS)
+bios_dumper_LDADD = $(PCIACCESS_LIBS)
+
+endif

src/bios_reader/bios_dumper.c

@@ -0,0 +1,98 @@
+/*
+ * Copyright © 2007 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <pciaccess.h>
+#include <err.h>
+
+static void usage(void)
+{
+    fprintf(stderr, "usage: bios_dumper <filename>\n");
+    exit(1);
+}
+
+int main(int argc, char **argv)
+{
+    struct pci_device *dev;
+    void *bios;
+    int err, fd;
+
+    if (argc != 2)
+	usage();
+
+    err = pci_system_init();
+    if (err != 0) {
+	fprintf(stderr, "Couldn't initialize PCI system: %s\n", strerror(err));
+	exit(1);
+    }
+
+    /* Grab the graphics card */
+    dev = pci_device_find_by_slot(0, 0, 2, 0);
+    if (dev == NULL)
+	errx(1, "Couldn't find graphics card");
+
+    if (dev->vendor_id != 0x8086)
+	errx(1, "Graphics card is non-intel");
+
+    err = pci_device_probe(dev);
+    if (err != 0) {
+	fprintf(stderr, "Couldn't probe graphics card: %s\n", strerror(err));
+	exit(1);
+    }
+
+    bios = malloc(dev->rom_size);
+    if (bios == NULL)
+	errx(1, "Couldn't allocate memory for BIOS data\n");
+
+    err = pci_device_read_rom(dev, bios);
+    if (err != 0) {
+	fprintf(stderr, "Couldn't read graphics card ROM: %s\n",
+		strerror(err));
+	exit(1);
+    }
+
+    fd = open(argv[1], O_RDWR | O_CREAT | O_TRUNC);
+    if (fd < 0) {
+	fprintf(stderr, "Couldn't open output: %s\n", strerror(errno));
+	exit(1);
+    }
+
+    if (write(fd, bios, dev->rom_size) < dev->rom_size) {
+	fprintf(stderr, "Couldn't write BIOS data: %s\n", strerror(errno));
+	exit(1);
+    }
+
+    close(fd);
+    pci_system_cleanup();
+
+    return 0;
+}