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) 2014, Red Hat, Inc. 8# Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR> 9# 10# This program and the accompanying materials are licensed and made available 11# under the terms and conditions of the BSD License which accompanies this 12# distribution. The full text of the license may be found at 13# http://opensource.org/licenses/bsd-license.php 14# 15# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT 16# WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 17# 18### 19 20set -e -u 21 22STEM=$(dirname -- "$0")/$(basename -- "$0" .sh) 23 24# 25# Install exit handler -- remove temporary files. 26# 27exit_handler() 28{ 29 rm -f -- "$STEM".bin "$STEM".disasm "$STEM".offsets "$STEM".insns \ 30 "$STEM".bytes 31} 32trap exit_handler EXIT 33 34# 35# Assemble the source file. 36# 37nasm -o "$STEM".bin -- "$STEM".asm 38 39# 40# Disassemble it, in order to get a binary dump associated with the source. 41# (ndisasm doesn't recognize the "--" end-of-options delimiter.) 42# 43ndisasm "$STEM".bin >"$STEM".disasm 44 45# 46# Create three files, each with one column of the disassembly. 47# 48# The first column contains the offsets, and it starts the comment. 49# 50cut -c 1-8 -- "$STEM".disasm \ 51| sed -e 's,^, /* ,' >"$STEM".offsets 52 53# 54# The second column contains the assembly-language instructions, and it closes 55# the comment. We first pad it to 30 characters. 56# 57cut -c 29- -- "$STEM".disasm \ 58| sed -e 's,$, ,' \ 59 -e 's,^\(.\{30\}\).*$,\1 */,' >"$STEM".insns 60 61# 62# The third column contains the bytes corresponding to the instruction, 63# represented as C integer constants. First strip trailing whitespace from the 64# middle column of the input disassembly, then process pairs of nibbles. 65# 66cut -c 11-28 -- "$STEM".disasm \ 67| sed -e 's, \+$,,' -e 's/\(..\)/ 0x\1,/g' >"$STEM".bytes 68 69# 70# Write the output file, recombining the columns. The output should have CRLF 71# line endings. 72# 73{ 74 printf '//\n' 75 printf '// THIS FILE WAS GENERATED BY "%s". DO NOT EDIT.\n' \ 76 "$(basename -- "$0")" 77 printf '//\n' 78 printf '#ifndef _VBE_SHIM_H_\n' 79 printf '#define _VBE_SHIM_H_\n' 80 printf 'STATIC CONST UINT8 mVbeShim[] = {\n' 81 paste -d ' ' -- "$STEM".offsets "$STEM".insns "$STEM".bytes 82 printf '};\n' 83 printf '#endif\n' 84} \ 85| unix2dos >"$STEM".h 86