diff options
Diffstat (limited to 'pc-bios/optionrom')
| -rw-r--r-- | pc-bios/optionrom/Makefile | 48 | ||||
| -rw-r--r-- | pc-bios/optionrom/signrom.c | 79 |
2 files changed, 127 insertions, 0 deletions
diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile new file mode 100644 index 0000000000..c4a6f42625 --- /dev/null +++ b/pc-bios/optionrom/Makefile @@ -0,0 +1,48 @@ +all: build-all + +include ../../config-host.mak + +VPATH=$(SRC_PATH)/pc-bios/optionrom +OBJCOPY=objcopy + +# from kernel sources - scripts/Kbuild.include +# try-run +# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise) +# Exit code chooses option. "$$TMP" is can be used as temporary file and +# is automatically cleaned up. +try-run = $(shell set -e; \ + TMP="$(TMPOUT).$$$$.tmp"; \ + if ($(1)) >/dev/null 2>&1; \ + then echo "$(2)"; \ + else echo "$(3)"; \ + fi; \ + rm -f "$$TMP") + +# cc-option-yn +# Usage: flag := $(call cc-option-yn,-march=winchip-c6) +cc-option-yn = $(call try-run,\ + $(CC) $(KBUILD_CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",y,n) + +CFLAGS = -Wall -Wstrict-prototypes -Werror -fomit-frame-pointer -fno-builtin +CFLAGS += -I$(SRC_PATH) +ifeq ($(call cc-option-yn,-fno-stack-protector),y) +CFLAGS += -fno-stack-protector +endif + +build-all: multiboot.bin + +%.o: %.S + $(CC) $(CFLAGS) -o $@ -c $< + +%.img: %.o + $(LD) --oformat binary -Ttext 0 -o $@ $< + +%.bin: %.img signrom + ./signrom $< $@ + cp $@ $(SRC_PATH)/pc-bios/ + +signrom: signrom.c + $(CC) -o $@ -g -Wall $^ + +clean: + $(RM) *.o *.img *.bin signrom *~ diff --git a/pc-bios/optionrom/signrom.c b/pc-bios/optionrom/signrom.c new file mode 100644 index 0000000000..fe8d677459 --- /dev/null +++ b/pc-bios/optionrom/signrom.c @@ -0,0 +1,79 @@ +/* + * Extended Boot Option ROM + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright IBM Corporation, 2007 + * Authors: Anthony Liguori <aliguori@us.ibm.com> + */ + +#include <stdio.h> +#include <stdint.h> +#include <string.h> + +int main(int argc, char **argv) +{ + FILE *fin, *fout; + char buffer[512], oldbuffer[512]; + int i, size, lag = 0; + uint8_t sum = 0; + + if (argc != 3) { + printf("Usage: %s ROM OUTPUT\n", argv[0]); + return 1; + } + + fin = fopen(argv[1], "rb"); + fout = fopen(argv[2], "wb"); + + if (fin == NULL || fout == NULL) { + fprintf(stderr, "Could not open input/output files\n"); + return 1; + } + + do { + size = fread(buffer, 512, 1, fin); + if (size == 1) { + for (i = 0; i < 512; i++) + sum += buffer[i]; + + if (lag) { + if (fwrite(oldbuffer, 512, 1, fout) != 1) { + fprintf(stderr, "Write failed\n"); + return 1; + } + } + lag = 1; + memcpy(oldbuffer, buffer, 512); + } + } while (size == 1); + + if (size != 0) { + fprintf(stderr, "Failed to read from input file\n"); + return 1; + } + + oldbuffer[511] = -sum; + + if (fwrite(oldbuffer, 512, 1, fout) != 1) { + fprintf(stderr, "Failed to write to output file\n"); + return 1; + } + + fclose(fin); + fclose(fout); + + return 0; +} |