mirror of
https://github.com/crosstool-ng/crosstool-ng.git
synced 2025-02-20 17:12:55 +00:00
scripts: add a cross-ldd-like
Add a cross-ldd that mimicks a native ldd.
This commit is contained in:
Yann E. MORIN"
parent
d7287c9b5f
commit
c03ac58aca
@ -81,6 +81,20 @@ config THREADS_NONE
|
||||
|
||||
endchoice
|
||||
|
||||
config LIBC_XLDD
|
||||
bool
|
||||
prompt "Install a cross ldd-like helper"
|
||||
default y
|
||||
help
|
||||
Say 'Y' here if you want to have a ldd-like helper that
|
||||
you can run on your build system, and that will (try to)
|
||||
resolve shared libraries dependencies as if run on the
|
||||
target.
|
||||
|
||||
Note that the cross-ldd helper is not a full replacement
|
||||
for the native ldd. Please see the help, by running it
|
||||
with '--help' for more explanations.
|
||||
|
||||
source "config.gen/libc.in.2"
|
||||
|
||||
endif # ! LIBC_none
|
||||
|
||||
@ -21,6 +21,19 @@ do_finish() {
|
||||
CT_DoExecLog ALL chmod 755 "${CT_PREFIX_DIR}/bin/${CT_TARGET}-populate"
|
||||
fi
|
||||
|
||||
if [ "${CT_LIBC_XLDD}" = "y" ]; then
|
||||
CT_DoLog EXTRA "Installing a cross-ldd helper"
|
||||
sed -r -e 's|@@CT_TARGET@@|'"${CT_TARGET}"'|g;' \
|
||||
-e 's|@@CT_install@@|'"${install}"'|g;' \
|
||||
-e 's|@@CT_bash@@|'"${bash}"'|g;' \
|
||||
-e 's|@@CT_grep@@|'"${grep}"'|g;' \
|
||||
-e 's|@@CT_make@@|'"${make}"'|g;' \
|
||||
-e 's|@@CT_sed@@|'"${sed}"'|g;' \
|
||||
"${CT_LIB_DIR}/scripts/xldd.in" \
|
||||
>"${CT_PREFIX_DIR}/bin/${CT_TARGET}-ldd"
|
||||
CT_DoExecLog ALL chmod 755 "${CT_PREFIX_DIR}/bin/${CT_TARGET}-ldd"
|
||||
fi
|
||||
|
||||
# Create the aliases to the target tools
|
||||
CT_DoLog EXTRA "Creating toolchain aliases"
|
||||
CT_Pushd "${CT_PREFIX_DIR}/bin"
|
||||
|
||||
214
scripts/xldd.in
Executable file
214
scripts/xldd.in
Executable file
@ -0,0 +1,214 @@
|
||||
#!@@CT_bash@@
|
||||
|
||||
# NON-CONFIGURABLE STUFF!
|
||||
export LC_ALL=C
|
||||
sed="@@CT_sed@@"
|
||||
grep="@@CT_grep@@"
|
||||
my_name="$( basename "${0}" )"
|
||||
prefix="${0%-ldd}"
|
||||
gcc="${prefix}-gcc"
|
||||
readelf="${prefix}-readelf"
|
||||
fake_load_addr="$((0xdeadbeef))"
|
||||
fake_load_addr_sys="$((0x8badf00d))"
|
||||
ld_library_path="/lib:/usr/lib"
|
||||
|
||||
do_error() {
|
||||
printf "%s: %s\n" "${my_name}" "$*" >&2
|
||||
}
|
||||
|
||||
do_opt_error() {
|
||||
do_error "$@"
|
||||
printf "Try \`%s --help' for more information\n >&2"
|
||||
}
|
||||
|
||||
show_version() {
|
||||
# Fake a real ldd, just in case some dumb script would check
|
||||
cat <<_EOF_
|
||||
ldd (crosstool-NG) 1.8.0
|
||||
Copyright (C) 2010 "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
|
||||
This is free software; see the source for copying conditions. There is NO
|
||||
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
Licensed under the GPLv2, see the file LICENSES in the top-directory of the
|
||||
sources for this package.
|
||||
_EOF_
|
||||
}
|
||||
|
||||
show_help() {
|
||||
cat <<_EOF_
|
||||
Usage: ${my_name} [OPTION]... --root DIR FILE...
|
||||
--help print this help and exit
|
||||
--version print version information and exit
|
||||
--root dir treat dir as being the root of the target
|
||||
-s, --show-system mark libs from the sysroot with a trailing '[*]'
|
||||
|
||||
_EOF_
|
||||
cat <<_EOF_ |fmt
|
||||
${my_name} tries to mimick the behavior of a real native ldd, but can be
|
||||
used in a cross-development environment. Here is how it differs from a
|
||||
real native ldd:
|
||||
|
||||
The LD_LIBRARY_PATH variable is not used, as it can not reliably be
|
||||
guessed except at runtime, and we can't run.
|
||||
|
||||
${my_name} does not scan /etc/ld.so.cache, but instead uses /etc/ld.so.conf
|
||||
(it understands the include directives therein for libces that have that).
|
||||
[Note: this is missing for now...]
|
||||
|
||||
${my_name} will search the directory specified with --root for libraries
|
||||
to resolve the NEEDED tags. If --root is not set, then ${my_name} will
|
||||
use the value in the environment variable \${CT_XLDD_ROOT}. If neither
|
||||
is set, then this is an error.
|
||||
|
||||
If NEEDED libraries can't be found in the specified root directory, then
|
||||
${my_name} will also look in the sysroot of the toolchain to see if it
|
||||
can find them.
|
||||
|
||||
For NEEDED libraries that were found, the output will look like:
|
||||
libneeded.so => /path/to/libneeded.so (0xloadaddr)
|
||||
|
||||
and for those that were not found, the output will look like:
|
||||
libneeded.so not found
|
||||
|
||||
The paths are relative to the specified root directory, or to the sysroot
|
||||
(eg. /lib/libneeded.so, /usr/lib/libneeded.so, and so on...).
|
||||
|
||||
The expected load address 'loadaddr' is a faked address to match the output
|
||||
of the real ldd, but has no actual meaning (set to some constants for now,
|
||||
0x8badf00d for libraries from the sysroot, 0xdeadbeff for others).
|
||||
_EOF_
|
||||
|
||||
# Unimplemeted yet:
|
||||
# -d, --data-relocs process data relocations
|
||||
# -r, --function-relocs process data and function relocations
|
||||
# -u, --unused print unused direct dependencies
|
||||
# -v, --verbose print all information
|
||||
|
||||
# See also this thread:
|
||||
# http://sourceware.org/ml/crossgcc/2008-09/msg00057.html
|
||||
}
|
||||
|
||||
# Parse command line options
|
||||
root="${CT_XLDD_ROOT}"
|
||||
show_system=
|
||||
while true; do
|
||||
case "${1}" in
|
||||
--help)
|
||||
show_help
|
||||
exit 0
|
||||
;;
|
||||
--version)
|
||||
show_version
|
||||
exit 0
|
||||
;;
|
||||
--root)
|
||||
root="$2"
|
||||
shift
|
||||
;;
|
||||
--root=*)
|
||||
root="${1#--root=}"
|
||||
;;
|
||||
--show-system|-s)
|
||||
show_system=1
|
||||
;;
|
||||
-*)
|
||||
do_opt_error "unrecognized option \`${1}'"
|
||||
exit 1
|
||||
;;
|
||||
*)
|
||||
break
|
||||
;;
|
||||
esac
|
||||
shift
|
||||
done
|
||||
|
||||
# Sanity checks
|
||||
if [ -z "${root}" ]; then
|
||||
do_opt_error "no root given"
|
||||
exit 1
|
||||
fi
|
||||
if [ ! -d "${root}" ]; then
|
||||
do_error "\`${root}': no such file or directory"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
sysroot="$( "${gcc}" -print-sysroot )"
|
||||
|
||||
do_report_needed_found() {
|
||||
local needed="${1}"
|
||||
local path="${2}"
|
||||
local system="${3}"
|
||||
local loadaddr
|
||||
local sys
|
||||
|
||||
if [ -z "${system}" ]; then
|
||||
loadaddr="${fake_load_addr}"
|
||||
else
|
||||
loadaddr="${fake_load_addr_sys}"
|
||||
if [ -n "${show_system}" ]; then
|
||||
sys=" [*]"
|
||||
fi
|
||||
fi
|
||||
|
||||
# 8 to fake a 32-bit load address
|
||||
printf "%8s%s => %s (0x%0*x)%s\n" \
|
||||
"" \
|
||||
"${needed}" \
|
||||
"${path}" \
|
||||
8 \
|
||||
"${loadaddr}" \
|
||||
"${sys}"
|
||||
}
|
||||
|
||||
# Search a needed file, scanning ${lib_dir} in the root directory
|
||||
do_find_needed() {
|
||||
local needed="${1}"
|
||||
local found
|
||||
local found_sysroot
|
||||
local d
|
||||
|
||||
for d in "${needed_search_path[@]}"; do
|
||||
if [ -f "${root}${d}/${needed}" ]; then
|
||||
found="${d}/${needed}"
|
||||
fi
|
||||
done
|
||||
if [ -z "${found}" ]; then
|
||||
for d in "${needed_search_path[@]}"; do
|
||||
if [ -f "${sysroot}${d}/${needed}" ]; then
|
||||
found_sysroot="${d}/${needed}"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
|
||||
if [ -n "${found}" ]; then
|
||||
do_report_needed_found "${needed}" "${found}"
|
||||
do_process_file "${root}${found}"
|
||||
elif [ -n "${found_sysroot}" ]; then
|
||||
do_report_needed_found "${needed}" "${found_sysroot}" "sys"
|
||||
do_process_file "${sysroot}${found_sysroot}"
|
||||
else
|
||||
printf "%8c%s not found\n" "" "${needed}"
|
||||
fi
|
||||
}
|
||||
|
||||
# Scan a file for all NEEDED tags
|
||||
do_process_file() {
|
||||
local file="${1}"
|
||||
|
||||
"${readelf}" -d "${file}" \
|
||||
|"${grep}" -E '\(NEEDED\)' \
|
||||
|"${sed}" -r -e 's/^.*Shared library:[[:space:]]+\[(.*)\]$/\1/;' \
|
||||
|while read needed; do
|
||||
do_find_needed "${needed}"
|
||||
done
|
||||
}
|
||||
|
||||
# Build up the full list of search directories
|
||||
declare -a needed_search_path
|
||||
ld_library_path="${ld_library_path}:"
|
||||
while [ -n "${ld_library_path}" ]; do
|
||||
d="${ld_library_path%%:*}"
|
||||
[ -n "${d}" ] && needed_search_path+=( "${d}" )
|
||||
ld_library_path="${ld_library_path#*:}"
|
||||
done
|
||||
|
||||
do_process_file "${1}"
|
||||
Loading…
x
Reference in New Issue
Block a user