39 lines
1.2 KiB
ArmAsm
39 lines
1.2 KiB
ArmAsm
/*
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* cf-hosted.S --
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*
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* Copyright (c) 2006 CodeSourcery Inc
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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* and license this software and its documentation for any purpose, provided
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* that existing copyright notices are retained in all copies and that this
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* notice is included verbatim in any distributions. No written agreement,
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* license, or royalty fee is required for any of the authorized uses.
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* Modifications to this software may be copyrighted by their authors
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* and need not follow the licensing terms described here, provided that
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* the new terms are clearly indicated on the first page of each file where
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* they apply.
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*/
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/* Semihosting function. The debugger intercepts the halt, and
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determines that it is followed by the sentinel pattern. */
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.globl __hosted
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__hosted:
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linkw %fp,#0
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movel %fp@(8),%d0
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movel %fp@(12),%d1
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.align 4
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/* The halt sequence must be 'nop; halt' and aligned to a 4 byte
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boundary. */
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nop
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halt
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/* This sentinel instruction value must be immediately after
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the halt instruction. The debugger will adjust the pc, so
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that it is never executed. This instruction is
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'movec %sp,0'. */
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.long 0x4e7bf000
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unlk %fp
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rts
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