| 1 | #!/bin/sh
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| 2 | ###
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| 3 | # @file
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| 4 | # Shell script to assemble and dump the fake Int10h handler from NASM source to
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| 5 | # a C array.
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| 6 | #
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| 7 | # Copyright (C) 2014, Red Hat, Inc.
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| 8 | # Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
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| 9 | #
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| 10 | # SPDX-License-Identifier: BSD-2-Clause-Patent
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| 11 | #
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| 12 | ###
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| 13 |
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| 14 | set -e -u
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| 15 |
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| 16 | STEM=$(dirname -- "$0")/$(basename -- "$0" .sh)
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| 17 |
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| 18 | #
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| 19 | # Install exit handler -- remove temporary files.
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| 20 | #
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| 21 | exit_handler()
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| 22 | {
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| 23 | rm -f -- "$STEM".bin "$STEM".disasm "$STEM".offsets "$STEM".insns \
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| 24 | "$STEM".bytes
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| 25 | }
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| 26 | trap exit_handler EXIT
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| 27 |
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| 28 | #
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| 29 | # Assemble the source file.
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| 30 | # (nasm doesn't recognize the "--" end-of-options delimiter;
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| 31 | # <https://bugzilla.nasm.us/show_bug.cgi?id=3392829>.)
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| 32 | #
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| 33 | nasm -o "$STEM".bin "$STEM".asm
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| 34 |
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| 35 | #
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| 36 | # Disassemble it, in order to get a binary dump associated with the source.
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| 37 | # (ndisasm doesn't recognize the "--" end-of-options delimiter;
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| 38 | # <https://bugzilla.nasm.us/show_bug.cgi?id=3392829>.)
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| 39 | #
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| 40 | ndisasm "$STEM".bin >"$STEM".disasm
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| 41 |
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| 42 | #
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| 43 | # Create three files, each with one column of the disassembly.
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| 44 | #
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| 45 | # The first column contains the offsets, and it starts the comment.
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| 46 | #
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| 47 | cut -c 1-8 -- "$STEM".disasm \
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| 48 | | sed -e 's,^, /* ,' >"$STEM".offsets
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| 49 |
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| 50 | #
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| 51 | # The second column contains the assembly-language instructions, and it closes
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| 52 | # the comment. We first pad it to 30 characters.
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| 53 | #
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| 54 | cut -c 29- -- "$STEM".disasm \
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| 55 | | sed -e 's,$, ,' \
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| 56 | -e 's,^\(.\{30\}\).*$,\1 */,' >"$STEM".insns
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| 57 |
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| 58 | #
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| 59 | # The third column contains the bytes corresponding to the instruction,
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| 60 | # represented as C integer constants. First strip trailing whitespace from the
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| 61 | # middle column of the input disassembly, then process pairs of nibbles.
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| 62 | #
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| 63 | cut -c 11-28 -- "$STEM".disasm \
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| 64 | | sed -e 's, \+$,,' -e 's/\(..\)/ 0x\1,/g' >"$STEM".bytes
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| 65 |
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| 66 | #
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| 67 | # Write the output file, recombining the columns. The output should have CRLF
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| 68 | # line endings.
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| 69 | #
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| 70 | {
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| 71 | printf '//\n'
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| 72 | printf '// THIS FILE WAS GENERATED BY "%s". DO NOT EDIT.\n' \
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| 73 | "$(basename -- "$0")"
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| 74 | printf '//\n'
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| 75 | printf '#ifndef _VBE_SHIM_H_\n'
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| 76 | printf '#define _VBE_SHIM_H_\n'
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| 77 | printf 'STATIC CONST UINT8 mVbeShim[] = {\n'
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| 78 | paste -d ' ' -- "$STEM".offsets "$STEM".insns "$STEM".bytes
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| 79 | printf '};\n'
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| 80 | printf '#endif\n'
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| 81 | } \
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| 82 | | unix2dos >"$STEM".h
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