| 1 | #!/bin/sh
|
|---|
| 2 | ###
|
|---|
| 3 | # @file
|
|---|
| 4 | # Shell script to assemble and dump the fake Int10h handler from NASM source to
|
|---|
| 5 | # a C array.
|
|---|
| 6 | #
|
|---|
| 7 | # Copyright (C) 2020, Rebecca Cran <[email protected]>
|
|---|
| 8 | # Copyright (C) 2014, Red Hat, Inc.
|
|---|
| 9 | # Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
|
|---|
| 10 | #
|
|---|
| 11 | # SPDX-License-Identifier: BSD-2-Clause-Patent
|
|---|
| 12 | #
|
|---|
| 13 | ###
|
|---|
| 14 |
|
|---|
| 15 | set -e -u
|
|---|
| 16 |
|
|---|
| 17 | STEM=$(dirname -- "$0")/$(basename -- "$0" .sh)
|
|---|
| 18 |
|
|---|
| 19 | #
|
|---|
| 20 | # Install exit handler -- remove temporary files.
|
|---|
| 21 | #
|
|---|
| 22 | exit_handler()
|
|---|
| 23 | {
|
|---|
| 24 | rm -f -- "$STEM".bin "$STEM".disasm "$STEM".offsets "$STEM".insns \
|
|---|
| 25 | "$STEM".bytes
|
|---|
| 26 | }
|
|---|
| 27 | trap exit_handler EXIT
|
|---|
| 28 |
|
|---|
| 29 | #
|
|---|
| 30 | # Assemble the source file.
|
|---|
| 31 | #
|
|---|
| 32 | nasm -o "$STEM".bin -- "$STEM".asm
|
|---|
| 33 |
|
|---|
| 34 | #
|
|---|
| 35 | # Disassemble it, in order to get a binary dump associated with the source.
|
|---|
| 36 | # (ndisasm doesn't recognize the "--" end-of-options delimiter.)
|
|---|
| 37 | #
|
|---|
| 38 | ndisasm "$STEM".bin >"$STEM".disasm
|
|---|
| 39 |
|
|---|
| 40 | #
|
|---|
| 41 | # Create three files, each with one column of the disassembly.
|
|---|
| 42 | #
|
|---|
| 43 | # The first column contains the offsets, and it starts the comment.
|
|---|
| 44 | #
|
|---|
| 45 | cut -c 1-8 -- "$STEM".disasm \
|
|---|
| 46 | | sed -e 's,^, /* ,' >"$STEM".offsets
|
|---|
| 47 |
|
|---|
| 48 | #
|
|---|
| 49 | # The second column contains the assembly-language instructions, and it closes
|
|---|
| 50 | # the comment. We first pad it to 30 characters.
|
|---|
| 51 | #
|
|---|
| 52 | cut -c 29- -- "$STEM".disasm \
|
|---|
| 53 | | sed -e 's,$, ,' \
|
|---|
| 54 | -e 's,^\(.\{30\}\).*$,\1 */,' >"$STEM".insns
|
|---|
| 55 |
|
|---|
| 56 | #
|
|---|
| 57 | # The third column contains the bytes corresponding to the instruction,
|
|---|
| 58 | # represented as C integer constants. First strip trailing whitespace from the
|
|---|
| 59 | # middle column of the input disassembly, then process pairs of nibbles.
|
|---|
| 60 | #
|
|---|
| 61 | cut -c 11-28 -- "$STEM".disasm \
|
|---|
| 62 | | sed -e 's, \+$,,' -e 's/\(..\)/ 0x\1,/g' | sed 's/0x ,//g' >"$STEM".bytes
|
|---|
| 63 |
|
|---|
| 64 | #
|
|---|
| 65 | # Write the output file, recombining the columns. The output should have CRLF
|
|---|
| 66 | # line endings.
|
|---|
| 67 | #
|
|---|
| 68 | {
|
|---|
| 69 | printf '//\n'
|
|---|
| 70 | printf '// THIS FILE WAS GENERATED BY "%s". DO NOT EDIT.\n' \
|
|---|
| 71 | "$(basename -- "$0")"
|
|---|
| 72 | printf '//\n'
|
|---|
| 73 | printf '#ifndef _VBE_SHIM_H_\n'
|
|---|
| 74 | printf '#define _VBE_SHIM_H_\n'
|
|---|
| 75 | printf 'STATIC CONST UINT8 mVbeShim[] = {\n'
|
|---|
| 76 | paste -d ' ' -- "$STEM".offsets "$STEM".insns "$STEM".bytes
|
|---|
| 77 | printf '};\n'
|
|---|
| 78 | printf '#endif\n'
|
|---|
| 79 | } \
|
|---|
| 80 | | unix2dos >"$STEM".h
|
|---|
