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38e6b75d3b
Drop thunk_ra macro in favor of an additional argument to the thunk macro since their bodies are almost identical. Do a whitespace scrubbing and use CFI-aware macros for full annotation. Signed-off-by: Borislav Petkov <bp@alien8.de> Link: http://lkml.kernel.org/r/1306873314-32523-5-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
47 lines
1.1 KiB
ArmAsm
47 lines
1.1 KiB
ArmAsm
/*
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* Save registers before calling assembly functions. This avoids
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* disturbance of register allocation in some inline assembly constructs.
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* Copyright 2001,2002 by Andi Kleen, SuSE Labs.
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* Added trace_hardirqs callers - Copyright 2007 Steven Rostedt, Red Hat, Inc.
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* Subject to the GNU public license, v.2. No warranty of any kind.
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*/
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#include <linux/linkage.h>
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#include <asm/dwarf2.h>
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#include <asm/calling.h>
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#include <asm/rwlock.h>
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/* rdi: arg1 ... normal C conventions. rax is saved/restored. */
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.macro THUNK name, func, put_ret_addr_in_rdi=0
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.globl \name
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\name:
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CFI_STARTPROC
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/* this one pushes 9 elems, the next one would be %rIP */
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SAVE_ARGS
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.if \put_ret_addr_in_rdi
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movq_cfi_restore 9*8, rdi
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.endif
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call \func
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jmp restore
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CFI_ENDPROC
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.endm
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#ifdef CONFIG_TRACE_IRQFLAGS
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THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1
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THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
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#endif
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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THUNK lockdep_sys_exit_thunk,lockdep_sys_exit
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#endif
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/* SAVE_ARGS below is used only for the .cfi directives it contains. */
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CFI_STARTPROC
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SAVE_ARGS
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restore:
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RESTORE_ARGS
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ret
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CFI_ENDPROC
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