diff options
| -rw-r--r-- | src/cmd/Makefile | 3 | ||||
| -rw-r--r-- | src/cmd/mex/Makefile | 18 | ||||
| -rw-r--r-- | src/cmd/mex/mex.c | 107 |
3 files changed, 128 insertions, 0 deletions
diff --git a/src/cmd/Makefile b/src/cmd/Makefile index 0cde3ff..7c51ebf 100644 --- a/src/cmd/Makefile +++ b/src/cmd/Makefile @@ -22,6 +22,8 @@ all: LIBC_DIR=$(shell pwd)/../$(LIBC_DIR) cd cat/; make LDSCRIPT=$(LDSCRIPT) CC=$(CC) AS=$(AS) LD=$(LD) SYSROOT=$(SYSROOT) \ LIBC_DIR=$(shell pwd)/../$(LIBC_DIR) + cd mex/; make LDSCRIPT=$(LDSCRIPT) CC=$(CC) AS=$(AS) LD=$(LD) SYSROOT=$(SYSROOT) \ + LIBC_DIR=$(shell pwd)/../$(LIBC_DIR) .PHONY: clean clean: @@ -33,3 +35,4 @@ clean: cd login/; make clean cd echo/; make clean cd cat/; make clean + cd mex/; make clean diff --git a/src/cmd/mex/Makefile b/src/cmd/mex/Makefile new file mode 100644 index 0000000..bc88287 --- /dev/null +++ b/src/cmd/mex/Makefile @@ -0,0 +1,18 @@ +include ../../data/build/user.mk + +CFILES = $(shell find . -name "*.c") +CFILES = $(shell find . -name "*.c") +CFLAGS = -L$(LIBC_DIR) -lc $(INTERNAL_CFLAGS) \ + -L../../lib/libwidget -lwidget -L../../lib/libc/ -lc \ + -I../../lib/libwidget/include/ +OBJECTS = $(CFILES:%.c=%.o) + +$(SYSROOT)/usr/bin/mex: $(OBJECTS) + $(LD) $(OBJECTS) -o $@ $(CFLAGS) + +%.o: %.c + $(CC) $(INTERNAL_CFLAGS) -c $(CFLAGS) $< -o $@ + +.PHONY: clean +clean: + rm -f *.o *.d diff --git a/src/cmd/mex/mex.c b/src/cmd/mex/mex.c new file mode 100644 index 0000000..da501c3 --- /dev/null +++ b/src/cmd/mex/mex.c @@ -0,0 +1,107 @@ +/* + * Copyright (c) 2025 Ian Marco Moffett and L5 engineers + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <unistd.h> +#include <stddef.h> +#include <fcntl.h> +#include <string.h> +#include <stdio.h> +#include <stdarg.h> + +#define LINE_LEN 16 + +static void +dump_line(const char *line, size_t len) +{ + /* The amount of bytes we write */ + const uint8_t BYTE_COUNT = 2; + + for (size_t i = 0; i < LINE_LEN; ++i) { + if (i < len) { + printf("%02x", line[i] & 0xFF); + } else { + printf(" "); + } + + /* Put spacing between bytes */ + if (((i + 1) % BYTE_COUNT) == 0) { + printf(" "); + } + } + + printf(" "); + for (size_t i = 0; i < len; ++i) { + if (line[i] > 31 && line[i] < 127) { + printf("%c", line[i]); + } else { + printf("."); + } + } + + printf("\n"); +} + +static void +dump_file(int fd) +{ + char buf[LINE_LEN]; + ssize_t count; + size_t offset = 0; + + for (;;) { + count = read(fd, buf, sizeof(char) * LINE_LEN); + if (count <= 0) { + break; + } + + printf("%08x: ", offset); + offset += LINE_LEN; + dump_line(buf, count); + } +} + +int +main(int argc, char **argv) +{ + int fd; + + if (__argc < 2) { + printf("mex: usage: mex <filename>\n"); + return -1; + } + + if ((fd = open(__argv[1], O_RDONLY)) < 0) { + printf("mex: failed to open input\n"); + return fd; + } + + dump_file(fd); + close(fd); + return 0; +} |