41918ec82e
Enable the function graph tracer in combination with the EABI unwinder, so that Thumb2 builds or Clang ARM builds can make use of it. This involves using the unwinder to locate the return address of an instrumented function on the stack, so that it can be overridden and made to refer to the ftrace handling routines that need to be called at function return. Given that for these builds, it is not guaranteed that the value of the link register is stored on the stack, fall back to the stack slot that will be used by the ftrace exit code to restore LR in the instrumented function's execution context. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
107 lines
3.4 KiB
Makefile
107 lines
3.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux kernel.
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#
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CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET)
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AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
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ifdef CONFIG_FUNCTION_TRACER
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CFLAGS_REMOVE_ftrace.o = -pg
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CFLAGS_REMOVE_insn.o = -pg
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CFLAGS_REMOVE_patch.o = -pg
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CFLAGS_REMOVE_unwind.o = -pg
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endif
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CFLAGS_REMOVE_return_address.o = -pg
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# Object file lists.
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obj-y := elf.o entry-common.o irq.o opcodes.o \
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process.o ptrace.o reboot.o io.o \
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setup.o signal.o sigreturn_codes.o \
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stacktrace.o sys_arm.o time.o traps.o
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KASAN_SANITIZE_stacktrace.o := n
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KASAN_SANITIZE_traps.o := n
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obj-y += return_address.o
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obj-$(CONFIG_ATAGS) += atags_parse.o
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obj-$(CONFIG_ATAGS_PROC) += atags_proc.o
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obj-$(CONFIG_DEPRECATED_PARAM_STRUCT) += atags_compat.o
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ifeq ($(CONFIG_CPU_V7M),y)
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obj-y += entry-v7m.o v7m.o
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else
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obj-y += entry-armv.o
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endif
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obj-$(CONFIG_MMU) += bugs.o
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obj-$(CONFIG_CPU_IDLE) += cpuidle.o
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obj-$(CONFIG_ISA_DMA_API) += dma.o
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obj-$(CONFIG_FIQ) += fiq.o fiqasm.o
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obj-$(CONFIG_MODULES) += armksyms.o module.o
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obj-$(CONFIG_ARM_MODULE_PLTS) += module-plts.o
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obj-$(CONFIG_ISA_DMA) += dma-isa.o
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obj-$(CONFIG_PCI) += bios32.o isa.o
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obj-$(CONFIG_ARM_CPU_SUSPEND) += sleep.o suspend.o
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obj-$(CONFIG_HIBERNATION) += hibernate.o
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obj-$(CONFIG_SMP) += smp.o
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ifdef CONFIG_MMU
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obj-$(CONFIG_SMP) += smp_tlb.o
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endif
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obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o
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obj-$(CONFIG_HAVE_ARM_TWD) += smp_twd.o
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obj-$(CONFIG_ARM_ARCH_TIMER) += arch_timer.o
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obj-$(CONFIG_FUNCTION_TRACER) += entry-ftrace.o
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obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o insn.o patch.o
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obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o insn.o patch.o
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obj-$(CONFIG_JUMP_LABEL) += jump_label.o insn.o patch.o
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obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
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# Main staffs in KPROBES are in arch/arm/probes/ .
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obj-$(CONFIG_KPROBES) += patch.o insn.o
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obj-$(CONFIG_OABI_COMPAT) += sys_oabi-compat.o
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obj-$(CONFIG_ARM_THUMBEE) += thumbee.o
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obj-$(CONFIG_KGDB) += kgdb.o patch.o
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obj-$(CONFIG_ARM_UNWIND) += unwind.o
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obj-$(CONFIG_HAVE_TCM) += tcm.o
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obj-$(CONFIG_OF) += devtree.o
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obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
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obj-$(CONFIG_SWP_EMULATE) += swp_emulate.o
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CFLAGS_swp_emulate.o := -Wa,-march=armv7-a
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obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
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obj-$(CONFIG_CPU_XSCALE) += xscale-cp0.o
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obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o
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obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o
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obj-$(CONFIG_CPU_PJ4) += pj4-cp0.o
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obj-$(CONFIG_CPU_PJ4B) += pj4-cp0.o
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obj-$(CONFIG_IWMMXT) += iwmmxt.o
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obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o
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obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_xscale.o perf_event_v6.o \
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perf_event_v7.o
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AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt
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obj-$(CONFIG_ARM_CPU_TOPOLOGY) += topology.o
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obj-$(CONFIG_VDSO) += vdso.o
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obj-$(CONFIG_EFI) += efi.o
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obj-$(CONFIG_PARAVIRT) += paravirt.o
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head-y := head$(MMUEXT).o
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obj-$(CONFIG_DEBUG_LL) += debug.o
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obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
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obj-$(CONFIG_ARM_PATCH_PHYS_VIRT) += phys2virt.o
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# This is executed very early using a temporary stack when no memory allocator
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# nor global data is available. Everything has to be allocated on the stack.
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CFLAGS_head-inflate-data.o := $(call cc-option,-Wframe-larger-than=10240)
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obj-$(CONFIG_XIP_DEFLATED_DATA) += head-inflate-data.o
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obj-$(CONFIG_ARM_VIRT_EXT) += hyp-stub.o
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AFLAGS_hyp-stub.o :=-Wa,-march=armv7-a
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ifeq ($(CONFIG_ARM_PSCI),y)
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obj-$(CONFIG_SMP) += psci_smp.o
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endif
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obj-$(CONFIG_HAVE_ARM_SMCCC) += smccc-call.o
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extra-y := $(head-y) vmlinux.lds
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