59 lines
2.2 KiB
ArmAsm
59 lines
2.2 KiB
ArmAsm
/* Copyright (c) 2011 Red Hat Incorporated.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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The name of Red Hat Incorporated may not be used to endorse
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or promote products derived from this software without specific
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prior written permission.
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This software is provided by the copyright holders and contributors
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"AS IS" and any express or implied warranties, including, but not
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limited to, the implied warranties of merchantability and fitness for
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a particular purpose are disclaimed. In no event shall Red Hat
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incorporated be liable for any direct, indirect, incidental, special,
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exemplary, or consequential damages (including, but not limited to,
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procurement of substitute goods or services; loss of use, data, or
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profits; or business interruption) however caused and on any theory of
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liability, whether in contract, strict liability, or tort (including
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negligence or otherwise) arising in any way out of the use of this
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software, even if advised of the possibility of such damage. */
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#define PROFILE_SUPPORT 1
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#include "crt0.S"
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.global __mcount
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.type __mcount, @function
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__mcount:
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;; When a function is compiled for profiling, gcc creates code
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;; like this at the start of each profiled function:
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;;
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;; .global <func_name>
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;; <func_name>:
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;; bsr __mcount
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;; <...function's prologue...>
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;; <...function's body...>
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;;
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;; We must save all of the argument registers, extract the
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;; address of <func_name>, call _mcount_internal to do the
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;; real work and then restore the argument registers before
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;; returning.
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movw ax, [sp]
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push ax
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call !!__mcount_internal
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pop ax
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ret
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.size __mcount, . - __mcount
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