init

.gitattributes

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+arm/bin/gdbserver filter=lfs diff=lfs merge=lfs -text
+arm/bin/gdbserver_debug filter=lfs diff=lfs merge=lfs -text
+arm/bin/strace filter=lfs diff=lfs merge=lfs -text
+arm/bin/strace_debug filter=lfs diff=lfs merge=lfs -text

README.md

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+# Static Build artifacts for common tools
+
+See [arm/bin](arm/bin) for the artifacts. Note that the tripple is `arm-linux-gnueabihf`. (Although I don't believe [glibc](https://en.wikipedia.org/wiki/Glibc) is actually used since it's a static build)
+
+See the build instructions for cross-compilation in the corresponding markdown files.
+
+- [strace](strace.md)
+- [gdbserver](gdbserver.md)
+
+## Toolchains
+
+[arm-linux-gnueabihf-linaro-bin](https://aur.archlinux.org/packages/arm-linux-gnueabihf-linaro-bin) from [snapshots.linaro.org/gnu-toolchain](https://snapshots.linaro.org/gnu-toolchain/14.0-2023.06-1/)

arm/bin/strace-log-merge

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+#!/bin/sh
+#
+# This script processes strace -ff -tt output.  It merges the contents of all
+# STRACE_LOG.PID files and sorts them, printing result on the standard output.
+#
+# Copyright (c) 2012-2024 The strace developers.
+#
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+show_usage()
+{
+	cat <<__EOF__
+Usage: ${0##*/} STRACE_LOG
+
+Finds all STRACE_LOG.PID files, adds PID prefix to every line,
+then combines and sorts them, and prints result to standard output.
+
+It is assumed that STRACE_LOGs were produced by strace with -tt[t]
+option which prints timestamps (otherwise sorting won't do any good).
+__EOF__
+}
+
+dd='\([0-9][0-9]\)'
+ds='\([0-9][0-9]*\)'
+
+if [ $# -ne 1 ]; then
+	show_usage >&2
+	exit 1
+elif [ "$1" = '--help' ] || [ "$1" = '-h' ]; then
+	show_usage
+	exit 0
+fi
+
+logfile=$1
+
+iterate_logfiles()
+{
+	local file suffix
+
+	for file in "$logfile".*; do
+		[ -f "$file" ] || continue
+		suffix=${file#"$logfile".}
+		[ "$suffix" -gt 0 ] 2> /dev/null ||
+			continue
+		"$@" "$suffix" "$file"
+	done
+}
+
+max_suffix_length=0
+process_suffix()
+{
+	local suffix len
+	suffix="$1"; shift
+
+	len=${#suffix}
+	if [ $len -gt $max_suffix_length ]; then
+		max_suffix_length=$len
+	fi
+}
+
+process_logfile()
+{
+	local suffix file pid
+	suffix="$1"; shift
+	file="$1"; shift
+
+	pid=$(printf "%-*s" $max_suffix_length $suffix)
+	# Some strace logs have last line which is not '\n' terminated,
+	# so add extra newline to every file.
+	# Empty lines are removed later.
+	sed -n "s/^\($dd:\)\?\($dd:\)\?\($ds\.\)\?$ds /\2\4\6\7 $pid \0/p" < "$file"
+	echo
+}
+
+iterate_logfiles process_suffix
+
+[ $max_suffix_length -gt 0 ] || {
+	echo >&2 "${0##*/}: $logfile: strace output not found"
+	exit 1
+}
+
+iterate_logfiles process_logfile |
+	sort -s -n -k1,1 |
+	sed -n 's/^[0-9][0-9]* //p' |
+	grep -v '^$'
+
+rc=$?
+[ $rc -eq 1 ] &&
+	echo >&2 "${0##*/}: $logfile.* files do not look like log files produced by 'strace -tt'"
+exit $rc

arm/share/man/man1/strace-log-merge.1

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+.\" Copyright (c) 2017 The strace developers.
+.\" All rights reserved.
+.\"
+.\" SPDX-License-Identifier: LGPL-2.1-or-later
+.\"
+.\" Required option.
+.de OR
+.  ie \\n(.$-1 \
+.    RI "\fB\\$1\fP" "\ \\$2"
+.  el \
+.    BR "\\$1"
+..
+.\"
+.TH STRACE-LOG-MERGE 1 "2022-01-01" "strace 6.13.0.37.b6c94"
+.\"
+.SH NAME
+strace-log-merge \- merge strace \-ff \-tt output
+.\"
+.SH SYNOPSIS
+.SY strace\-log\-merge
+.IR STRACE_LOG
+.YS
+.SY strace\-log\-merge
+.OR \-\-help
+.YS
+.\"
+.SH DESCRIPTION
+.B strace\-log\-merge
+merges the output of
+.B strace \-ff \-tt[t]
+command, prepending PID to each line and sorting the result using time stamp as
+a key.
+.\"
+.SH OPTIONS
+.\"
+.TP
+.B \-\-help
+Show program usage and exit.
+.TP
+.I STRACE_LOG
+Output file name prefix of files produced by a
+.B strace -ff -tt[t]
+command.
+.SH EXIT STATUS
+.TP
+.B 0
+Success
+.TP
+.B Non-zero
+Error occurred: either no argument specified (in that case a usage is printed),
+or something went wrong during the processing of
+.IR STRACE_LOG ".*"
+files.
+.\"
+.SH USAGE EXAMPLE
+.sp
+.nf
+.ft CW
+$ strace -o sleepy -ff -tt -e trace=execve,nanosleep \\
+        sh -c 'sleep 0.1 & sleep 0.2 & sleep 0.3'
+$ strace-log-merge sleepy | fold -w 72 -s
+13475 21:13:52.040837 execve("/bin/sh", ["sh", "-c", "sleep 0.1 & sleep
+0.2 & sleep 0."...], 0x7ffde54b2450 /* 33 vars */) = 0
+13478 21:13:52.044050 execve("/bin/sleep", ["sleep", "0.3"],
+0x5631be4f87a8 /* 33 vars */) = 0
+13476 21:13:52.044269 execve("/bin/sleep", ["sleep", "0.1"],
+0x5631be4f87a8 /* 33 vars */) = 0
+13477 21:13:52.044389 execve("/bin/sleep", ["sleep", "0.2"],
+0x5631be4f87a8 /* 33 vars */) = 0
+13478 21:13:52.046207 nanosleep({tv_sec=0, tv_nsec=300000000}, NULL) = 0
+13476 21:13:52.046303 nanosleep({tv_sec=0, tv_nsec=100000000}, NULL) = 0
+13477 21:13:52.046318 nanosleep({tv_sec=0, tv_nsec=200000000}, NULL) = 0
+13476 21:13:52.146852 +++ exited with 0 +++
+13475 21:13:52.146942 --- SIGCHLD {si_signo=SIGCHLD,
+si_code=CLD_EXITED, si_pid=13476, si_uid=1000, si_status=0, si_utime=0,
+si_stime=0} ---
+13477 21:13:52.247782 +++ exited with 0 +++
+13475 21:13:52.247885 --- SIGCHLD {si_signo=SIGCHLD,
+si_code=CLD_EXITED, si_pid=13477, si_uid=1000, si_status=0, si_utime=0,
+si_stime=0} ---
+13478 21:13:52.347680 +++ exited with 0 +++
+13475 21:13:52.347786 --- SIGCHLD {si_signo=SIGCHLD,
+si_code=CLD_EXITED, si_pid=13478, si_uid=1000, si_status=0, si_utime=0,
+si_stime=0} ---
+13475 21:13:52.348069 +++ exited with 0 +++
+.ft R
+.fi
+.sp
+.\"
+.SH NOTES
+.I strace-log-merge
+does not work well with
+.B strace
+logs generated by
+.B strace -tt
+invocation that pass midnight, as those lack the information required
+for the proper sorting.
+Employing the
+.B -ttt
+option in the respective
+.B strace
+invocation should solve the problem.
+.\"
+.SH BUGS
+.I strace-log-merge
+does not perform any checks whether the files specified are in the correct
+format and implies that only files from a single
+.I strace
+session match
+.IR STRACE_LOG ".*"
+glob pattern.
+.\"
+.SH HISTORY
+The initial version of
+.I strace-log-merge
+was written by Denys Vlasenko in 2012.
+.\"
+.SH REPORTING BUGS
+Problems with
+.B strace-log-merge
+should be reported to the
+.B strace
+mailing list at <strace\-devel@lists.strace.io>.
+.\"
+.SH "SEE ALSO"
+.BR strace (1)

gdbserver.md

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+# Building GDB Server for ARM Linux (Static Linking)
+
+> [!NOTE]
+> This guide is generated by LLM. Please verify the correctness of the steps before using them.
+
+This document outlines the process for cross-compiling GDB Server for ARM Linux (arm-linux-gnueabihf) with static linking.
+
+## Prerequisites
+
+- Linux development environment
+- ARM cross-compiler toolchain (in this case at `/opt/gcc-arm-linux-guneabihf`)
+- GDB source code (version 14.2 used in this example)
+- zsh shell (recommended to avoid issues with PowerShell)
+
+## Build Script
+
+Here's a reproducible build script that automates the entire process:
+
+```bash
+#!/bin/zsh
+
+# Exit on error
+set -e
+
+# Configuration variables
+GDB_VERSION="14.2"
+GDB_SOURCE_DIR="/home/crosstyan/third-party/gdb-${GDB_VERSION}"
+TOOLCHAIN_PREFIX="/opt/gcc-arm-linux-guneabihf"
+TARGET="arm-linux-gnueabihf"
+INSTALL_PREFIX="/home/crosstyan/Image/rootfs"
+
+# Ensure we're in zsh
+if [ -z "$ZSH_VERSION" ]; then
+    echo "This script must be run in zsh shell!"
+    echo "Please run: zsh $0"
+    exit 1
+fi
+
+# Navigate to GDB source directory
+cd $GDB_SOURCE_DIR
+
+# Clean any previous build artifacts
+echo "Cleaning previous build artifacts..."
+make distclean || true
+
+# Configure GDB for cross-compilation with static linking
+echo "Configuring GDB for cross-compilation..."
+./configure \
+    --target=$TARGET \
+    --host=$TARGET \
+    --build=x86_64-linux-gnu \
+    --prefix=$INSTALL_PREFIX \
+    --disable-werror \
+    --enable-gdbserver=yes \
+    --disable-gdb \
+    --disable-binutils \
+    --disable-gas \
+    --disable-ld \
+    --disable-gold \
+    --disable-gprof \
+    LDFLAGS='-static' \
+    CC=$TOOLCHAIN_PREFIX/bin/$TARGET-gcc \
+    CXX=$TOOLCHAIN_PREFIX/bin/$TARGET-g++ \
+    AR=$TOOLCHAIN_PREFIX/bin/$TARGET-ar \
+    RANLIB=$TOOLCHAIN_PREFIX/bin/$TARGET-ranlib \
+    CFLAGS="-O2"
+
+# Build only the gdbserver component
+echo "Building gdbserver..."
+make -j$(nproc) all-gdbserver
+
+# Verify the built binary
+echo "Verifying the built binary..."
+file gdbserver/gdbserver
+readelf -h gdbserver/gdbserver
+
+# Install gdbserver (optional)
+# make install-gdbserver
+
+echo "Build completed successfully!"
+echo "The statically linked gdbserver binary is located at: $GDB_SOURCE_DIR/gdbserver/gdbserver"
+```
+
+## Manual Build Process
+
+If you prefer to build manually, follow these steps:
+
+1. **Ensure you're using zsh shell**:
+   ```bash
+   zsh
+   ```
+
+2. **Navigate to the GDB source directory**:
+   ```bash
+   cd /home/crosstyan/third-party/gdb-14.2
+   ```
+
+3. **Clean any previous build artifacts**:
+   ```bash
+   make distclean
+   ```
+
+4. **Configure GDB for cross-compilation with static linking**:
+   ```bash
+   ./configure \
+       --target=arm-linux-gnueabihf \
+       --host=arm-linux-gnueabihf \
+       --build=x86_64-linux-gnu \
+       --prefix=/home/crosstyan/Image/rootfs \
+       --disable-werror \
+       --enable-gdbserver=yes \
+       --disable-gdb \
+       --disable-binutils \
+       --disable-gas \
+       --disable-ld \
+       --disable-gold \
+       --disable-gprof \
+       LDFLAGS='-static' \
+       CC=/opt/gcc-arm-linux-guneabihf/bin/arm-linux-gnueabihf-gcc \
+       CXX=/opt/gcc-arm-linux-guneabihf/bin/arm-linux-gnueabihf-g++ \
+       AR=/opt/gcc-arm-linux-guneabihf/bin/arm-linux-gnueabihf-ar \
+       RANLIB=/opt/gcc-arm-linux-guneabihf/bin/arm-linux-gnueabihf-ranlib \
+       CFLAGS="-O2"
+   ```
+
+5. **Build only the gdbserver component**:
+   ```bash
+   make -j$(nproc) all-gdbserver
+   ```
+
+6. **Verify the built binary**:
+   ```bash
+   file gdbserver/gdbserver
+   readelf -h gdbserver/gdbserver
+   ```
+
+## Configuration Options Explained
+
+- `--target=arm-linux-gnueabihf`: Specifies the target architecture
+- `--host=arm-linux-gnueabihf`: Specifies the host architecture (same as target for cross-compilation)
+- `--build=x86_64-linux-gnu`: Specifies the build system architecture
+- `--prefix=/home/crosstyan/Image/rootfs`: Installation directory
+- `--disable-werror`: Prevents warnings from being treated as errors
+- `--enable-gdbserver=yes`: Enables building gdbserver
+- `--disable-gdb`, `--disable-binutils`, etc.: Disables building other components
+- `LDFLAGS='-static'`: Forces static linking
+- `CC=...`, `CXX=...`: Specifies the cross-compiler
+- `AR=...`, `RANLIB=...`: Specifies the cross-toolchain utilities
+- `CFLAGS="-O2"`: Optimization level
+
+## Verification
+
+After building, you can verify the binary with:
+
+```bash
+file gdbserver/gdbserver
+```
+
+Expected output:
+```
+gdbserver/gdbserver: ELF 32-bit LSB executable, ARM, EABI5 version 1 (GNU/Linux), statically linked, BuildID[sha1]=613dd203a0dff4326f6bd325222a6d882afd6168, for GNU/Linux 3.2.0, with debug_info, not stripped
+```
+
+And check the ELF header:
+```bash
+readelf -h gdbserver/gdbserver
+```
+
+Look for:
+```
+Machine: ARM
+Flags: 0x5000400, Version5 EABI, hard-float ABI
+```
+
+## Notes
+
+- The build process requires the dependencies to be built in the correct order (handled automatically by the Makefile)
+- There may be warnings during the linking process about certain glibc functions in statically linked binaries
+- The resulting binary is statically linked but some functions may still require shared libraries at runtime
+
+## Troubleshooting
+
+- If you encounter "file format not recognized" errors, ensure you're using the correct cross-toolchain
+- If the build fails with missing dependencies, check that all required libraries are installed
+
+## Strip
+
+```bash
+/opt/gcc-arm-linux-guneabihf/bin/arm-linux-gnueabihf-strip <your-binary>
+```
+
+## Notes
+
+> [!NOTE]
+> This part is a human artifact. No LLM involved.
+
+You might need to add
+
+```c
+#ifndef __NR_sigreturn
+#define __NR_SYSCALL_BASE	0
+#define __NR_sigreturn			(__NR_SYSCALL_BASE+119)
+#endif
+```
+
+to `gdbserver/linux-arm-low.cc` if you encounter the following error:
+
+```text
+In file included from ./../gdbsupport/array-view.h:24,
+                 from ./../gdbsupport/common-utils.h:27,
+                 from ./../gdbsupport/common-defs.h:208,
+                 from server.h:22,
+                 from linux-arm-low.cc:19:
+linux-arm-low.cc: In function ‘CORE_ADDR arm_sigreturn_next_pc(regcache*, int, int*)’:
+linux-arm-low.cc:890:29: error: ‘__NR_sigreturn’ was not declared in this scope; did you mean ‘sigreturn’?
+  890 |   gdb_assert (svc_number == __NR_sigreturn || svc_number == __NR_rt_sigreturn);
+      |                             ^~~~~~~~~~~~~~
+./../gdbsupport/gdb_assert.h:35:13: note: in definition of macro ‘gdb_assert’
+   35 |   ((void) ((expr) ? 0 :                                                       \
+      |             ^~~~
+linux-arm-low.cc: In function ‘CORE_ADDR get_next_pcs_syscall_next_pc(arm_get_next_pcs*)’:
+linux-arm-low.cc:944:21: error: ‘__NR_sigreturn’ was not declared in this scope; did you mean ‘sigreturn’?
+  944 |   if (svc_number == __NR_sigreturn || svc_number == __NR_rt_sigreturn)
+      |                     ^~~~~~~~~~~~~~
+      |                     sigreturn
+make: *** [Makefile:546: linux-arm-low.o] Error 1
+make: *** Waiting for unfinished jobs....
+```
+
+See also [asm/unistd.h](https://android.googlesource.com/kernel/msm/+/android-msm-flo-3.4-kitkat-mr0/arch/arm/include/asm/unistd.h#147) from Android source code.

strace.md

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+# strace
+
+```bash
+./configure --target=arm-linux-gnueabihf \
+    --host=arm-linux-gnueabihf \
+    --build=x86_64-linux-gnu  \
+    --prefix=/home/crosstyan/Image/rootfs \
+    LDFLAGS='-static -pthread' \
+    CC=/opt/gcc-arm-linux-guneabihf/bin/arm-linux-gnueabihf-gcc \
+    CXX=/opt/gcc-arm-linux-guneabihf/bin/arm-linux-gnueabihf-g++
+    CFLAGS="-O2"
+```