| 1 | /* |
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| 2 | |
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| 3 | Copyright (c) 2005, 2009 Red Hat Incorporated. |
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| 4 | All rights reserved. |
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| 5 | |
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| 6 | Redistribution and use in source and binary forms, with or without |
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| 7 | modification, are permitted provided that the following conditions are met: |
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| 8 | |
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| 9 | Redistributions of source code must retain the above copyright |
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| 10 | notice, this list of conditions and the following disclaimer. |
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| 11 | |
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| 12 | Redistributions in binary form must reproduce the above copyright |
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| 13 | notice, this list of conditions and the following disclaimer in the |
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| 14 | documentation and/or other materials provided with the distribution. |
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| 15 | |
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| 16 | The name of Red Hat Incorporated may not be used to endorse |
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| 17 | or promote products derived from this software without specific |
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| 18 | prior written permission. |
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| 19 | |
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| 20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 21 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 22 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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| 23 | DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY |
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| 24 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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| 25 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| 26 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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| 27 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 28 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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| 29 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 30 | |
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| 31 | */ |
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| 32 | |
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| 33 | #include "syscall.h" |
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| 34 | |
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| 35 | /* This mixture of C pre-processor macros and assembler |
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| 36 | macros is to get around the fact that the RX assembler |
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| 37 | does not support a line separator character. */ |
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| 38 | |
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| 39 | #define SYS__exit SYS_exit |
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| 40 | |
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| 41 | .macro syscall_body number |
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| 42 | /* We use interrupt 255 as a system call, |
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| 43 | with the call number in r5. */ |
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| 44 | mov # \number, r5 |
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| 45 | int # 255 |
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| 46 | rts |
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| 47 | .endm |
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| 48 | |
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| 49 | |
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| 50 | .macro do_syscall name number |
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| 51 | __\name: |
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| 52 | .global __\name |
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| 53 | _\name: |
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| 54 | .weak _\name |
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| 55 | syscall_body \number |
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| 56 | .endm |
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| 57 | |
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| 58 | |
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| 59 | #define S(name) do_syscall name SYS_##name |
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| 60 | #define SYSCALL(number) syscall_body number |
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