source: trunk/libs/newlib/src/libgloss/iq2000/trap.c @ 680

Last change on this file since 680 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

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