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Last change
on this file since 668 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:
520 bytes
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| Line | |
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| 1 | // Perform a system call. |
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| 2 | // Unused parameters should be set to 0. |
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| 3 | int __trap0(unsigned long func, unsigned long p1, unsigned long p2, unsigned long p3) |
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| 4 | { |
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| 5 | int ret = 0; |
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| 6 | asm volatile ("nop\n\tor %%4,%%0,%0" : : "r"(func)); |
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| 7 | asm volatile ("nop\n\tor %%5,%%0,%0" : : "r"(p1)); |
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| 8 | asm volatile ("nop\n\tor %%6,%%0,%0" : : "r"(p2)); |
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| 9 | asm volatile ("nop\n\tor %%7,%%0,%0" : : "r"(p3)); |
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| 10 | asm volatile ("nop\n\tor %%11,%%0,%0" : : "r"(func)); |
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| 11 | asm volatile ("syscall\n\tnop\n\tor %0,%%0,%%2" : "=r"(ret)); |
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| 12 | return ret; |
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| 13 | } |
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