Josh Conner
bb5242c8e4
Allows scripts to run under dash in magenta. Change-Id: I2913871ae92c8ca259fd00300e2171330782421e
115 linhas
3.1 KiB
Bash
Arquivo Executável
115 linhas
3.1 KiB
Bash
Arquivo Executável
#!/usr/bin/env bash
|
|
|
|
# Copyright 2016 The Fuchsia Authors
|
|
#
|
|
# Use of this source code is governed by a MIT-style
|
|
# license that can be found in the LICENSE file or at
|
|
# https://opensource.org/licenses/MIT
|
|
|
|
# This script reads the dynamic symbol table of a DSO (ELF file) via nm
|
|
# and writes out a sequence of lines for each symbol in the DSO's ABI
|
|
# that can be used as C macros. The macro invocations it writes look like:
|
|
# TYPE(NAME, [ADDRESS,] SIZE)
|
|
# The ADDRESS parameter is included only if the script is given the -a switch.
|
|
# The SIZE is forced to 0 for functions if the script is given the -z switch.
|
|
# The TYPE is one of:
|
|
# COMMON_OBJECT STT_COMMON symbol
|
|
# UNDEFINED SHN_UNDEF symbol
|
|
# UNDEFINED_WEAK_OBJECT SHN_UNDEF, STB_WEAK, STT_OBJECT symbol
|
|
# UNDEFINED_WEAK SHN_UNDEF, STB_WEAK, STT_FUNC symbol
|
|
# WEAK_DATA_OBJECT STB_WEAK, STT_OBJECT symbol
|
|
# WEAK_FUNCTION STB_WEAK, STT_FUNC symbol
|
|
# FUNCTION STB_GLOBAL, STT_FUNC symbol
|
|
# RODATA_OBJECT STB_GLOBAL, STT_OBJECT symbol in R/O section
|
|
# DATA_OBJECT STB_GLOBAL, STT_OBJECT symbol in R/W section
|
|
# BSS_OBJECT STB_GLOBAL symbol in SHT_NOBITS section
|
|
# (nm actually uses a haphazard combination of ELF symbol details and
|
|
# section details to choose its type letters rather than directly using the
|
|
# ELF symbol bits consistently. But the type letters map to these symbol
|
|
# details when symbols are defined in the usual ways by a compiler.)
|
|
|
|
if [ "$(basename $0)" = "sh" ]
|
|
then
|
|
set -e
|
|
else
|
|
set -o pipefail -e
|
|
fi
|
|
|
|
show_address=false
|
|
zero_function_size=false
|
|
while [ $# -gt 0 ]; do
|
|
case "$1" in
|
|
-a) show_address=true ;;
|
|
-z) zero_function_size=true ;;
|
|
*) break ;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
if [ $# -ne 2 ]; then
|
|
echo >&2 "Usage: $0 [-a] [-z] NM DSO"
|
|
exit 2
|
|
fi
|
|
|
|
NM="$1"
|
|
DSO="$2"
|
|
|
|
dump_names() {
|
|
"$NM" -P -g -D -S "$DSO"
|
|
}
|
|
|
|
massage() {
|
|
local read name type addr size
|
|
while read name type addr size; do
|
|
|
|
# The numbers are printed in hex, but without a leading "0x" indicator.
|
|
addr="0x$addr"
|
|
if [ -z "$size" ]; then
|
|
size="0x0"
|
|
else
|
|
size="0x$size"
|
|
fi
|
|
|
|
case "$name" in
|
|
# Linkers sometimes emit these symbols into .dynsym, but they are useless
|
|
# and should not be consider part of the ABI.
|
|
__bss_start|__bss_start__|__bss_end__|_bss_end__) continue ;;
|
|
__data_start|__end__|_stack|_etext|_edata|_end) continue ;;
|
|
esac
|
|
|
|
case "$type" in
|
|
C) type=COMMON_OBJECT ;;
|
|
U) type=UNDEFINED ;;
|
|
v) type=UNDEFINED_WEAK_OBJECT ;;
|
|
w) type=UNDEFINED_WEAK ;;
|
|
V) type=WEAK_DATA_OBJECT ;;
|
|
W) type=WEAK_FUNCTION ;;
|
|
T) type=FUNCTION ;;
|
|
R) type=RODATA_OBJECT ;;
|
|
D) type=DATA_OBJECT ;;
|
|
B) type=BSS_OBJECT ;;
|
|
*)
|
|
echo >&2 "$0: Unhandled type '${type}' for symbol '${name}'"
|
|
exit 1
|
|
;;
|
|
esac
|
|
|
|
if $show_address; then
|
|
address_item=", $addr"
|
|
else
|
|
address_item=
|
|
fi
|
|
|
|
if $zero_function_size; then
|
|
case $type in
|
|
FUNCTION|WEAK_FUNCTION) size="0x0" ;;
|
|
esac
|
|
fi
|
|
|
|
echo "${type}(${name}${address_item}, ${size})"
|
|
|
|
done
|
|
}
|
|
|
|
dump_names | massage
|