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#!/bin/gawk
#
# Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
# Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
# Copyright (c) 2015-2017 The strace developers.
# 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. The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
function compare_indices(i1, v1, i2, v2, \
c1, c2)
{
c1 = strtonum(sprintf("%s", i1))
c2 = strtonum(sprintf("%s", i2))
if (c1 < c2)
return -1
return (c1 != c2)
}
function array_get(array_idx, array_member, \
array_return)
{
array_return = array[array_idx][array_member]
if ("" == array_return) {
printf("%s: index [%s] without %s\n",
FILENAME, array_idx, array_member) > "/dev/stderr"
exit 1
}
return array_return
}
function array_seq(array_idx)
{
if ("seq" in array[array_idx])
return array[array_idx]["seq"]
index_seq++
array[array_idx]["seq"] = index_seq
return index_seq
}
function enter(array_idx,
item)
{
if (array_idx in called) {
printf("%s: index loop detected:", FILENAME) > "/dev/stderr"
for (item in called)
printf(" %s", item) > "/dev/stderr"
print "" > "/dev/stderr"
exit 1
}
called[array_idx] = 1
}
function leave(array_idx, to_return)
{
delete called[array_idx]
return to_return
}
function update_upper_bound(idx, val, \
count)
{
count = array[idx]["count"]
if (count == "")
count = 1
array[idx]["count"] = count * val
array[idx]["upper_bound"] = array[idx]["upper_bound"] "[" val "]"
}
function what_is(what_idx, \
item, loc_diff, location, prev_location, prev_returned_size, \
special, to_return, type_idx)
{
enter(what_idx)
special = array_get(what_idx, "special")
switch (special) {
case "base_type":
switch (array_get(what_idx, "encoding")) {
case 5: # signed
printf("int%s_t ",
8 * array_get(what_idx, "byte_size"))
break
case 7: # unsigned
printf("uint%s_t ",
8 * array_get(what_idx, "byte_size"))
break
default: # float, signed/unsigned char
printf("%s ", array_get(what_idx, "name"))
break
}
returned_size = array_get(what_idx, "byte_size")
break
case "enumeration_type":
returned_size = array_get(what_idx, "byte_size")
printf("uint%s_t ", 8 * returned_size)
break
case "pointer_type":
printf("mpers_ptr_t ")
returned_size = array_get(what_idx, "byte_size")
break
case "array_type":
type_idx = array_get(what_idx, "type")
what_is(type_idx)
to_return = array[what_idx]["upper_bound"]
if ("" == to_return)
to_return = "[0]"
returned_size = array[what_idx]["count"] * returned_size
return leave(what_idx, to_return)
break
case "structure_type":
print "struct {"
prev_location = 0
location = 0
returned_size = 0
prev_returned_size = 0
for (item in array) {
if ("parent" in array[item] && \
array_get(item, "parent") == what_idx) {
location = array_get(item, "location")
loc_diff = location - prev_location - \
prev_returned_size
if (loc_diff != 0) {
printf("unsigned char mpers_%s_%s[%s];\n",
"filler", array_seq(item), loc_diff)
}
prev_location = location
returned = what_is(item)
prev_returned_size = returned_size
printf("%s%s;\n", array[item]["name"], returned)
}
}
returned_size = array_get(what_idx, "byte_size")
loc_diff = returned_size - prev_location - prev_returned_size
if (loc_diff != 0) {
printf("unsigned char mpers_%s_%s[%s];\n",
"end_filler", array_seq(item), loc_diff)
}
printf("} ATTRIBUTE_PACKED ")
break
case "union_type":
print "union {"
for (item in array) {
if ("parent" in array[item] && \
array_get(item, "parent") == what_idx) {
returned = what_is(item)
printf("%s%s;\n", array[item]["name"], returned)
}
}
printf("} ")
returned_size = array_get(what_idx, "byte_size")
break
case "typedef":
type_idx = array_get(what_idx, "type")
return leave(what_idx, what_is(type_idx))
break
case "member":
type_idx = array_get(what_idx, "type")
return leave(what_idx, what_is(type_idx))
break
default:
type_idx = array_get(what_idx, "type")
what_is(type_idx)
break
}
return leave(what_idx, "")
}
BEGIN {
match(ARCH_FLAG, /[[:digit:]]+/, temparray)
default_pointer_size = temparray[0] / 8
print "#include <inttypes.h>"
}
/^<[[:xdigit:]]+>/ {
match($0, /([[:alnum:]]+)><([[:alnum:]]+)/, matches)
level = matches[1]
idx = "0x" matches[2]
array[idx]["idx"] = idx
parent[level] = idx
}
/^DW_AT_data_member_location/ {
if (!match($0, /\(DW_OP_plus_uconst:[[:space:]]+([[:digit:]]+)\)/, temparray))
match($0, /([[:digit:]]+)/, temparray)
array[idx]["location"] = temparray[1]
}
/^DW_AT_name/ {
match($0, /:[[:space:]]+([[:alpha:]_][[:alnum:]_[:space:]]*)/, \
temparray)
array[idx]["name"] = temparray[1]
}
/^DW_AT_byte_size/ {
match($0, /[[:digit:]]+/, temparray)
array[idx]["byte_size"] = temparray[0]
}
/^DW_AT_encoding/ {
match($0, /[[:digit:]]+/, temparray)
array[idx]["encoding"] = temparray[0]
}
/^DW_AT_type/ {
match($0, /:[[:space:]]+<(0x[[:xdigit:]]*)>$/, temparray)
array[idx]["type"] = temparray[1]
}
/^DW_AT_upper_bound/ {
match($0, /[[:digit:]]+/, temparray)
update_upper_bound(parent[level - 1], temparray[0] + 1)
}
/^DW_AT_count/ {
match($0, /[[:digit:]]+/, temparray)
update_upper_bound(parent[level - 1], temparray[0])
}
/^Abbrev Number:[^(]+\(DW_TAG_/ {
if (match($0, /typedef|union_type|structure_type|pointer_type\
|enumeration_type|array_type|base_type|member/, temparray)) {
array[idx]["special"] = temparray[0]
if ("pointer_type" == temparray[0])
array[idx]["byte_size"] = default_pointer_size
if (level > 1 && "member" == temparray[0])
array[idx]["parent"] = parent[level-1]
}
}
END {
PROCINFO["sorted_in"] = "compare_indices"
for (item in array) {
if (array[item]["special"] == "pointer_type") {
print "typedef uint" \
8 * array_get(item, "byte_size") "_t mpers_ptr_t;"
break
}
}
for (item in array) {
if (array[item]["name"] == VAR_NAME) {
type = array_get(item, "type")
print "typedef"
what_is(type)
name = array_get(type, "name")
print ARCH_FLAG "_" name ";"
print "#define MPERS_" \
ARCH_FLAG "_" name " " \
ARCH_FLAG "_" name
break
}
}
}
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