c1804a2368
Mark __x86_indirect_thunk_* functions as blacklist for kprobes because those functions can be called from anywhere in the kernel including blacklist functions of kprobes. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: David Woodhouse <dwmw@amazon.co.uk> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/151629209111.10241.5444852823378068683.stgit@devbox
50 lines
1.2 KiB
ArmAsm
50 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/stringify.h>
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#include <linux/linkage.h>
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#include <asm/dwarf2.h>
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#include <asm/cpufeatures.h>
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#include <asm/alternative-asm.h>
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#include <asm/export.h>
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#include <asm/nospec-branch.h>
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.macro THUNK reg
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.section .text.__x86.indirect_thunk
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ENTRY(__x86_indirect_thunk_\reg)
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CFI_STARTPROC
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JMP_NOSPEC %\reg
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CFI_ENDPROC
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ENDPROC(__x86_indirect_thunk_\reg)
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.endm
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/*
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* Despite being an assembler file we can't just use .irp here
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* because __KSYM_DEPS__ only uses the C preprocessor and would
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* only see one instance of "__x86_indirect_thunk_\reg" rather
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* than one per register with the correct names. So we do it
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* the simple and nasty way...
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*/
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#define __EXPORT_THUNK(sym) _ASM_NOKPROBE(sym); EXPORT_SYMBOL(sym)
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#define EXPORT_THUNK(reg) __EXPORT_THUNK(__x86_indirect_thunk_ ## reg)
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#define GENERATE_THUNK(reg) THUNK reg ; EXPORT_THUNK(reg)
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GENERATE_THUNK(_ASM_AX)
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GENERATE_THUNK(_ASM_BX)
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GENERATE_THUNK(_ASM_CX)
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GENERATE_THUNK(_ASM_DX)
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GENERATE_THUNK(_ASM_SI)
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GENERATE_THUNK(_ASM_DI)
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GENERATE_THUNK(_ASM_BP)
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GENERATE_THUNK(_ASM_SP)
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#ifdef CONFIG_64BIT
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GENERATE_THUNK(r8)
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GENERATE_THUNK(r9)
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GENERATE_THUNK(r10)
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GENERATE_THUNK(r11)
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GENERATE_THUNK(r12)
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GENERATE_THUNK(r13)
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GENERATE_THUNK(r14)
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GENERATE_THUNK(r15)
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#endif
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