kernel: generate BTF

Signed-off-by: Albin Kerouanton <albin.kerouanton@docker.com>

Author: akerouanton

.gitignore

@@ -1 +1,2 @@
 _output
+kernel/*.old

Dockerfile

@@ -45,7 +45,7 @@ RUN echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.con
 # Install build dependencies
 RUN --mount=type=cache,sharing=locked,id=kernel-aptlib,target=/var/lib/apt \
     --mount=type=cache,sharing=locked,id=kernel-aptcache,target=/var/cache/apt \
-        apt-get update && apt-get install -y build-essential libncurses-dev flex bison libssl-dev libelf-dev bc cpio git wget xz-utils
+        apt-get update && apt-get install -y build-essential libncurses-dev flex bison libssl-dev libelf-dev bc cpio git wget xz-utils pahole
 
 ARG KERNEL_VERSION="6.12.44"
 ARG KERNEL_ARCH="x86_64"

kernel/config-6.12.44-arm64

@@ -19,7 +19,7 @@ CONFIG_GCC_ASM_GOTO_OUTPUT_BROKEN=y
 CONFIG_CC_HAS_ASM_INLINE=y
 CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
 CONFIG_LD_CAN_USE_KEEP_IN_OVERLAY=y
-CONFIG_PAHOLE_VERSION=0
+CONFIG_PAHOLE_VERSION=124
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_TABLE_SORT=y
 CONFIG_THREAD_INFO_IN_TASK=y
@@ -3253,6 +3253,9 @@ CONFIG_DEBUG_INFO_DWARF4=y
 CONFIG_DEBUG_INFO_COMPRESSED_NONE=y
 # CONFIG_DEBUG_INFO_COMPRESSED_ZLIB is not set
 # CONFIG_DEBUG_INFO_SPLIT is not set
+CONFIG_DEBUG_INFO_BTF=y
+CONFIG_PAHOLE_HAS_SPLIT_BTF=y
+CONFIG_PAHOLE_HAS_LANG_EXCLUDE=y
 # CONFIG_GDB_SCRIPTS is not set
 CONFIG_FRAME_WARN=2048
 # CONFIG_STRIP_ASM_SYMS is not set

kernel/config-6.12.44-x86_64

@@ -19,7 +19,7 @@ CONFIG_GCC_ASM_GOTO_OUTPUT_BROKEN=y
 CONFIG_CC_HAS_ASM_INLINE=y
 CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
 CONFIG_LD_CAN_USE_KEEP_IN_OVERLAY=y
-CONFIG_PAHOLE_VERSION=0
+CONFIG_PAHOLE_VERSION=124
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_TABLE_SORT=y
 CONFIG_THREAD_INFO_IN_TASK=y
@@ -191,6 +191,7 @@ CONFIG_CGROUP_CPUACCT=y
 CONFIG_CGROUP_PERF=y
 CONFIG_CGROUP_BPF=y
 # CONFIG_CGROUP_MISC is not set
+# CONFIG_CGROUP_DEBUG is not set
 CONFIG_SOCK_CGROUP_DATA=y
 CONFIG_NAMESPACES=y
 CONFIG_UTS_NS=y
@@ -242,13 +243,15 @@ CONFIG_RSEQ=y
 CONFIG_CACHESTAT_SYSCALL=y
 CONFIG_KALLSYMS=y
 # CONFIG_KALLSYMS_SELFTEST is not set
+# CONFIG_KALLSYMS_ALL is not set
 CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
 CONFIG_HAVE_PERF_EVENTS=y
 
 #
 # Kernel Performance Events And Counters
 #
 CONFIG_PERF_EVENTS=y
+# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
 # end of Kernel Performance Events And Counters
 
 # CONFIG_PROFILING is not set
@@ -1430,6 +1433,7 @@ CONFIG_PCIEASPM_DEFAULT=y
 # CONFIG_PCIE_PTM is not set
 CONFIG_PCI_MSI=y
 CONFIG_PCI_QUIRKS=y
+# CONFIG_PCI_DEBUG is not set
 # CONFIG_PCI_STUB is not set
 CONFIG_PCI_ATS=y
 # CONFIG_PCI_IOV is not set
@@ -1519,6 +1523,9 @@ CONFIG_EXTRA_FIRMWARE=""
 # end of Firmware loader
 
 CONFIG_ALLOW_DEV_COREDUMP=y
+# CONFIG_DEBUG_DRIVER is not set
+# CONFIG_DEBUG_DEVRES is not set
+# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
 CONFIG_GENERIC_CPU_DEVICES=y
 CONFIG_GENERIC_CPU_AUTOPROBE=y
 CONFIG_GENERIC_CPU_VULNERABILITIES=y
@@ -2815,6 +2822,7 @@ CONFIG_CRYPTO_MANAGER=y
 CONFIG_CRYPTO_MANAGER2=y
 # CONFIG_CRYPTO_USER is not set
 # CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is not set
+# CONFIG_CRYPTO_MANAGER_EXTRA_TESTS is not set
 # CONFIG_CRYPTO_NULL is not set
 # CONFIG_CRYPTO_PCRYPT is not set
 CONFIG_CRYPTO_CRYPTD=y
@@ -3115,25 +3123,42 @@ CONFIG_PRINTK_TIME=y
 CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
 CONFIG_CONSOLE_LOGLEVEL_QUIET=4
 CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
+# CONFIG_BOOT_PRINTK_DELAY is not set
 # CONFIG_DYNAMIC_DEBUG is not set
 # CONFIG_DYNAMIC_DEBUG_CORE is not set
 # CONFIG_SYMBOLIC_ERRNAME is not set
 CONFIG_DEBUG_BUGVERBOSE=y
 # end of printk and dmesg options
 
-# CONFIG_DEBUG_KERNEL is not set
+CONFIG_DEBUG_KERNEL=y
+CONFIG_DEBUG_MISC=y
 
 #
 # Compile-time checks and compiler options
 #
+CONFIG_DEBUG_INFO=y
 CONFIG_AS_HAS_NON_CONST_ULEB128=y
+# CONFIG_DEBUG_INFO_NONE is not set
+# CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is not set
+CONFIG_DEBUG_INFO_DWARF4=y
+# CONFIG_DEBUG_INFO_DWARF5 is not set
+# CONFIG_DEBUG_INFO_REDUCED is not set
+CONFIG_DEBUG_INFO_COMPRESSED_NONE=y
+# CONFIG_DEBUG_INFO_COMPRESSED_ZLIB is not set
+# CONFIG_DEBUG_INFO_SPLIT is not set
+CONFIG_DEBUG_INFO_BTF=y
+CONFIG_PAHOLE_HAS_SPLIT_BTF=y
+CONFIG_PAHOLE_HAS_LANG_EXCLUDE=y
+# CONFIG_GDB_SCRIPTS is not set
 CONFIG_FRAME_WARN=2048
 # CONFIG_STRIP_ASM_SYMS is not set
+# CONFIG_READABLE_ASM is not set
 # CONFIG_HEADERS_INSTALL is not set
 # CONFIG_DEBUG_SECTION_MISMATCH is not set
 CONFIG_SECTION_MISMATCH_WARN_ONLY=y
 CONFIG_ARCH_WANT_FRAME_POINTERS=y
 CONFIG_FRAME_POINTER=y
+# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
 # end of Compile-time checks and compiler options
 
 #
@@ -3145,6 +3170,7 @@ CONFIG_DEBUG_FS_ALLOW_ALL=y
 # CONFIG_DEBUG_FS_DISALLOW_MOUNT is not set
 # CONFIG_DEBUG_FS_ALLOW_NONE is not set
 CONFIG_HAVE_ARCH_KGDB=y
+# CONFIG_KGDB is not set
 CONFIG_ARCH_HAS_UBSAN=y
 # CONFIG_UBSAN is not set
 CONFIG_HAVE_KCSAN_COMPILER=y
@@ -3153,27 +3179,40 @@ CONFIG_HAVE_KCSAN_COMPILER=y
 #
 # Networking Debugging
 #
+# CONFIG_NET_DEV_REFCNT_TRACKER is not set
+# CONFIG_NET_NS_REFCNT_TRACKER is not set
+# CONFIG_DEBUG_NET is not set
 # end of Networking Debugging
 
 #
 # Memory Debugging
 #
 # CONFIG_PAGE_EXTENSION is not set
+# CONFIG_DEBUG_PAGEALLOC is not set
 CONFIG_SLUB_DEBUG=y
 # CONFIG_SLUB_DEBUG_ON is not set
+# CONFIG_PAGE_OWNER is not set
 # CONFIG_PAGE_TABLE_CHECK is not set
 # CONFIG_PAGE_POISONING is not set
 # CONFIG_DEBUG_RODATA_TEST is not set
 CONFIG_ARCH_HAS_DEBUG_WX=y
 # CONFIG_DEBUG_WX is not set
 CONFIG_GENERIC_PTDUMP=y
+# CONFIG_PTDUMP_DEBUGFS is not set
 CONFIG_HAVE_DEBUG_KMEMLEAK=y
+# CONFIG_DEBUG_KMEMLEAK is not set
 # CONFIG_PER_VMA_LOCK_STATS is not set
+# CONFIG_DEBUG_OBJECTS is not set
 # CONFIG_SHRINKER_DEBUG is not set
+# CONFIG_DEBUG_STACK_USAGE is not set
+# CONFIG_SCHED_STACK_END_CHECK is not set
 CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y
+# CONFIG_DEBUG_VM is not set
 # CONFIG_DEBUG_VM_PGTABLE is not set
 CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
+# CONFIG_DEBUG_VIRTUAL is not set
 CONFIG_DEBUG_MEMORY_INIT=y
+# CONFIG_DEBUG_PER_CPU_MAPS is not set
 # CONFIG_MEM_ALLOC_PROFILING is not set
 CONFIG_HAVE_ARCH_KASAN=y
 CONFIG_HAVE_ARCH_KASAN_SW_TAGS=y
@@ -3187,18 +3226,26 @@ CONFIG_HAVE_ARCH_KFENCE=y
 # CONFIG_KFENCE is not set
 # end of Memory Debugging
 
+# CONFIG_DEBUG_SHIRQ is not set
+
 #
 # Debug Oops, Lockups and Hangs
 #
 # CONFIG_PANIC_ON_OOPS is not set
 CONFIG_PANIC_ON_OOPS_VALUE=0
 CONFIG_PANIC_TIMEOUT=0
+# CONFIG_SOFTLOCKUP_DETECTOR is not set
 CONFIG_HAVE_HARDLOCKUP_DETECTOR_BUDDY=y
+# CONFIG_HARDLOCKUP_DETECTOR is not set
+# CONFIG_DETECT_HUNG_TASK is not set
+# CONFIG_WQ_WATCHDOG is not set
+# CONFIG_WQ_CPU_INTENSIVE_REPORT is not set
 # end of Debug Oops, Lockups and Hangs
 
 #
 # Scheduler Debugging
 #
+CONFIG_SCHED_DEBUG=y
 CONFIG_SCHED_INFO=y
 # CONFIG_SCHEDSTATS is not set
 # end of Scheduler Debugging
@@ -3207,26 +3254,53 @@ CONFIG_SCHED_INFO=y
 # Lock Debugging (spinlocks, mutexes, etc...)
 #
 CONFIG_LOCK_DEBUGGING_SUPPORT=y
+# CONFIG_PROVE_LOCKING is not set
+# CONFIG_LOCK_STAT is not set
+# CONFIG_DEBUG_RT_MUTEXES is not set
+# CONFIG_DEBUG_SPINLOCK is not set
+# CONFIG_DEBUG_MUTEXES is not set
+# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
+# CONFIG_DEBUG_RWSEMS is not set
+# CONFIG_DEBUG_LOCK_ALLOC is not set
+# CONFIG_DEBUG_ATOMIC_SLEEP is not set
+# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+# CONFIG_LOCK_TORTURE_TEST is not set
 # CONFIG_WW_MUTEX_SELFTEST is not set
+# CONFIG_SCF_TORTURE_TEST is not set
+# CONFIG_CSD_LOCK_WAIT_DEBUG is not set
 # end of Lock Debugging (spinlocks, mutexes, etc...)
 
 # CONFIG_DEBUG_IRQFLAGS is not set
 CONFIG_STACKTRACE=y
 # CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
+# CONFIG_DEBUG_KOBJECT is not set
 
 #
 # Debug kernel data structures
 #
+# CONFIG_DEBUG_LIST is not set
+# CONFIG_DEBUG_PLIST is not set
+# CONFIG_DEBUG_SG is not set
+# CONFIG_DEBUG_NOTIFIERS is not set
+# CONFIG_DEBUG_MAPLE_TREE is not set
 # end of Debug kernel data structures
 
 #
 # RCU Debugging
 #
+# CONFIG_RCU_SCALE_TEST is not set
+# CONFIG_RCU_TORTURE_TEST is not set
+# CONFIG_RCU_REF_SCALE_TEST is not set
 CONFIG_RCU_CPU_STALL_TIMEOUT=21
 CONFIG_RCU_EXP_CPU_STALL_TIMEOUT=0
 # CONFIG_RCU_CPU_STALL_CPUTIME is not set
+# CONFIG_RCU_TRACE is not set
+# CONFIG_RCU_EQS_DEBUG is not set
 # end of RCU Debugging
 
+# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
+# CONFIG_CPU_HOTPLUG_STATE_CONTROL is not set
+# CONFIG_LATENCYTOP is not set
 CONFIG_USER_STACKTRACE_SUPPORT=y
 CONFIG_HAVE_FUNCTION_TRACER=y
 CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
@@ -3253,6 +3327,8 @@ CONFIG_HAVE_SAMPLE_FTRACE_DIRECT_MULTI=y
 # Kernel Testing and Coverage
 #
 # CONFIG_KUNIT is not set
+# CONFIG_NOTIFIER_ERROR_INJECTION is not set
+# CONFIG_FAULT_INJECTION is not set
 CONFIG_ARCH_HAS_KCOV=y
 CONFIG_CC_HAS_SANCOV_TRACE_PC=y
 # CONFIG_KCOV is not set