Last change
on this file since 643 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
749 bytes
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Line | |
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1 | // MCore StartUp Code. |
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2 | |
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3 | .import main |
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4 | .import exit |
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5 | |
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6 | .text |
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7 | .export _start |
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8 | _start: |
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9 | .export _mainCRTStartup |
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10 | _mainCRTStartup: |
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11 | // Initialise the stack pointer |
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12 | lrw r1, _stack |
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13 | mov r0, r1 |
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14 | |
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15 | // Zero the .bss data space |
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16 | lrw r1, __bss_start__ |
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17 | lrw r2, __bss_end__ |
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18 | movi r3, 0 |
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19 | .L0: |
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20 | st r3, (r1, 0) |
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21 | addi r1, 4 |
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22 | cmphs r1, r2 |
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23 | bf .L0 |
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24 | #ifdef __ELF__ |
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25 | // Call the global/static constructors |
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26 | jbsr _init |
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27 | |
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28 | // Setup destructors to be called from exit, |
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29 | // just in case main never returns... |
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30 | lrw r2, _fini |
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31 | jbsr atexit |
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32 | #endif |
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33 | |
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34 | // Initialise the parameters to main() |
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35 | movi r2, 0 // argc |
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36 | movi r3, 0 // argv |
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37 | movi r4, 0 // envp |
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38 | |
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39 | // Call main |
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40 | jbsr main |
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41 | |
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42 | // Call exit |
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43 | movi r2, 0 |
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44 | jbsr exit |
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45 | |
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46 | // We should never reach here. |
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47 | bkpt |
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48 | |
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49 | |
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