| [444] | 1 | /* Copyright (c) 2012, 2013 Red Hat, Inc. All rights reserved. |
|---|
| 2 | |
|---|
| 3 | This copyrighted material is made available to anyone wishing to use, modify, |
|---|
| 4 | copy, or redistribute it subject to the terms and conditions of the BSD |
|---|
| 5 | License. This program is distributed in the hope that it will be useful, |
|---|
| 6 | but WITHOUT ANY WARRANTY expressed or implied, including the implied warranties |
|---|
| 7 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. A copy of this license |
|---|
| 8 | is available at http://www.opensource.org/licenses. Any Red Hat trademarks that |
|---|
| 9 | are incorporated in the source code or documentation are not subject to the BSD |
|---|
| 10 | License and may only be used or replicated with the express permission of |
|---|
| 11 | Red Hat, Inc. |
|---|
| 12 | */ |
|---|
| 13 | |
|---|
| 14 | /* Be wary: the lower N bits of the *address* of the function |
|---|
| 15 | determines the syscall used by the simulator. Thus, the addresses |
|---|
| 16 | listed here depend on the syscall numbers in ../syscalls.h. */ |
|---|
| 17 | |
|---|
| 18 | /* As per the MSP430x200 Family Users Guide, section 1.5, "An |
|---|
| 19 | instruction fetch from the address range 0x0000 - 0x01FF will reset |
|---|
| 20 | the device." We take advantage of that to do syscalls in the |
|---|
| 21 | simulator, by trying to execute specific addresses in that range |
|---|
| 22 | and letting the simulator catch them while simulating the CALL |
|---|
| 23 | instruction. In theory, this is an operation that the physical |
|---|
| 24 | hardware will never attempt to do, so it won't interfere with the |
|---|
| 25 | simulation's accuracy (i.e. we aren't abusing holes in the opcode |
|---|
| 26 | map, for example). */ |
|---|
| 27 | |
|---|
| 28 | #include "../syscall.h" |
|---|
| 29 | #include "memmodel.h" |
|---|
| 30 | |
|---|
| 31 | .macro sc,a |
|---|
| 32 | sc2 \a,\a |
|---|
| 33 | .endm |
|---|
| 34 | |
|---|
| 35 | .macro sc2,name,num |
|---|
| 36 | .weak \name |
|---|
| 37 | .global \name |
|---|
| 38 | \name = 0x180 + \num |
|---|
| 39 | .endm |
|---|
| 40 | |
|---|
| 41 | #define SC(n) sc2 n,SYS_##n |
|---|
| 42 | |
|---|
| 43 | sc2 _exit,SYS_exit |
|---|
| 44 | SC (exit) |
|---|
| 45 | SC (open) |
|---|
| 46 | SC (close) |
|---|
| 47 | SC (read) |
|---|
| 48 | /* SC (write)*/ |
|---|
| 49 | SC (fstat) |
|---|
| 50 | SC (lseek) |
|---|
| 51 | SC (kill) |
|---|
| 52 | |
|---|
| 53 | .weak isatty |
|---|
| 54 | .global isatty |
|---|
| 55 | isatty: |
|---|
| 56 | .weak _isatty |
|---|
| 57 | .global _isatty |
|---|
| 58 | _isatty: |
|---|
| 59 | MOV #1,R12 |
|---|
| 60 | ret_ |
|---|
| 61 | |
|---|
| 62 | .weak getpid |
|---|
| 63 | .global getpid |
|---|
| 64 | getpid: |
|---|
| 65 | MOV #42,R12 |
|---|
| 66 | ret_ |
|---|
| 67 | |
|---|
| 68 | .weak gettimeofday |
|---|
| 69 | .global gettimeofday |
|---|
| 70 | gettimeofday: |
|---|
| 71 | MOV #0,R12 |
|---|
| 72 | ret_ |
|---|
| 73 | .size gettimeofday , . - gettimeofday |
|---|
