| 1 | /* Copyright (c) 2012, 2013 Red Hat, Inc. All rights reserved. |
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| 2 | |
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| 3 | This copyrighted material is made available to anyone wishing to use, modify, |
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| 4 | copy, or redistribute it subject to the terms and conditions of the BSD |
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| 5 | License. This program is distributed in the hope that it will be useful, |
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| 6 | but WITHOUT ANY WARRANTY expressed or implied, including the implied warranties |
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| 7 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. A copy of this license |
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| 8 | is available at http://www.opensource.org/licenses. Any Red Hat trademarks that |
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| 9 | are incorporated in the source code or documentation are not subject to the BSD |
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| 10 | License and may only be used or replicated with the express permission of |
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| 11 | Red Hat, Inc. |
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| 12 | */ |
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| 13 | |
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| 14 | /* Be wary: the lower N bits of the *address* of the function |
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| 15 | determines the syscall used by the simulator. Thus, the addresses |
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| 16 | listed here depend on the syscall numbers in ../syscalls.h. */ |
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| 17 | |
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| 18 | /* As per the MSP430x200 Family Users Guide, section 1.5, "An |
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| 19 | instruction fetch from the address range 0x0000 - 0x01FF will reset |
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| 20 | the device." We take advantage of that to do syscalls in the |
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| 21 | simulator, by trying to execute specific addresses in that range |
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| 22 | and letting the simulator catch them while simulating the CALL |
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| 23 | instruction. In theory, this is an operation that the physical |
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| 24 | hardware will never attempt to do, so it won't interfere with the |
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| 25 | simulation's accuracy (i.e. we aren't abusing holes in the opcode |
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| 26 | map, for example). */ |
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| 27 | |
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| 28 | #include "../syscall.h" |
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| 29 | #include "memmodel.h" |
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| 30 | |
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| 31 | .macro sc,a |
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| 32 | sc2 \a,\a |
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| 33 | .endm |
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| 34 | |
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| 35 | .macro sc2,name,num |
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| 36 | .weak \name |
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| 37 | .global \name |
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| 38 | \name = 0x180 + \num |
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| 39 | .endm |
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| 40 | |
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| 41 | #define SC(n) sc2 n,SYS_##n |
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| 42 | |
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| 43 | sc2 _exit,SYS_exit |
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| 44 | SC (exit) |
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| 45 | SC (open) |
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| 46 | SC (close) |
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| 47 | SC (read) |
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| 48 | /* SC (write)*/ |
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| 49 | SC (fstat) |
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| 50 | SC (lseek) |
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| 51 | SC (kill) |
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| 52 | |
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| 53 | .weak isatty |
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| 54 | .global isatty |
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| 55 | isatty: |
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| 56 | .weak _isatty |
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| 57 | .global _isatty |
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| 58 | _isatty: |
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| 59 | MOV #1,R12 |
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| 60 | ret_ |
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| 61 | |
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| 62 | .weak getpid |
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| 63 | .global getpid |
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| 64 | getpid: |
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| 65 | MOV #42,R12 |
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| 66 | ret_ |
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| 67 | |
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| 68 | .weak gettimeofday |
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| 69 | .global gettimeofday |
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| 70 | gettimeofday: |
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| 71 | MOV #0,R12 |
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| 72 | ret_ |
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| 73 | .size gettimeofday , . - gettimeofday |
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