diff options
Diffstat (limited to 'libgloss/iq2000/trap.c')
-rw-r--r-- | libgloss/iq2000/trap.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libgloss/iq2000/trap.c b/libgloss/iq2000/trap.c new file mode 100644 index 000000000..217cef233 --- /dev/null +++ b/libgloss/iq2000/trap.c @@ -0,0 +1,13 @@ +// Perform a system call. +// Unused parameters should be set to 0. +int __trap0(unsigned long func, unsigned long p1, unsigned long p2, unsigned long p3) +{ + int ret = 0; + asm volatile ("nop\n\tor %%4,%%0,%0" : : "r"(func)); + asm volatile ("nop\n\tor %%5,%%0,%0" : : "r"(p1)); + asm volatile ("nop\n\tor %%6,%%0,%0" : : "r"(p2)); + asm volatile ("nop\n\tor %%7,%%0,%0" : : "r"(p3)); + asm volatile ("nop\n\tor %%11,%%0,%0" : : "r"(func)); + asm volatile ("syscall\n\tnop\n\tor %0,%%0,%%2" : "=r"(ret)); + return ret; +} |