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Toolchain+Meta: Support kernel debugging with host AArch64 GDB

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Previously, we would unconditionally build GDB from source for the
AArch64 toolchain. This commit makes it possible to use the system's
`gdb` binary if it supports the architecture, or `aarch64-elf-gdb` if
such a package is installed.

An `aarch64-elf-gdb` package will be available through Homebrew once
this PR is merged: https://github.com/Homebrew/homebrew-core/pull/127323
This commit is contained in:
Daniel Bertalan 2023-04-02 10:15:08 +02:00 • committed by Andrew Kaster
parent 66c12af45f
commit 924758c6f8
2 changed files with 32 additions and 14 deletions
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22
Meta/debug-kernel.sh
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@ -1,4 +1,4 @@
#!/bin/sh
#!/usr/bin/env bash
SCRIPT_DIR="$(dirname "${0}")"
@ -9,16 +9,18 @@ fi
# Set this environment variable to override the default debugger.
#
if [ -z "$SERENITY_KERNEL_DEBUGGER" ]; then
if [ "$SERENITY_ARCH" = "aarch64" ]; then
# Prepend the toolchain aarch64 bin directory so we pick up GDB from there
PATH="$SCRIPT_DIR/../Toolchain/Local/aarch64/bin:$PATH"
SERENITY_KERNEL_DEBUGGER="aarch64-pc-serenity-gdb"
# Prepend the toolchain bin directory so we pick up GDB from there
PATH="$SCRIPT_DIR/../Toolchain/Local/$SERENITY_ARCH/bin:$PATH"
if command -v "$SERENITY_ARCH-pc-serenity-gdb" >/dev/null; then
SERENITY_KERNEL_DEBUGGER="$SERENITY_ARCH-pc-serenity-gdb"
elif command -v "$SERENITY_ARCH-elf-gdb" >/dev/null; then
SERENITY_KERNEL_DEBUGGER="$SERENITY_ARCH-elf-gdb"
elif command -v gdb >/dev/null && gdb ex 'set architecture' -ex 'quit' | grep "${SERENITY_ARCH//_/-}"; then
SERENITY_KERNEL_DEBUGGER="gdb"
else
if command -v x86_64-elf-gdb >/dev/null 2>&1; then
SERENITY_KERNEL_DEBUGGER="x86_64-elf-gdb"
else
SERENITY_KERNEL_DEBUGGER=gdb
fi
echo "Error: No suitable GDB installation found." >&2
exit 1
fi
fi