Guys,
I'm looking forward to run vpp in mips32 arch,but problem was caused by
"clib_calljmp","clib_setjmp" and "clib_longjmp". There is no code for mips32 in
vpp, so I wrote them by myself, and they worked very well in my test program,
However,when I run vpp with them, segmentation fault was happend when excute a
system call like "open","SYS_clock_gettime",etc.
The "stack" in "clib_calljmp" was alloced by "clib_mem_alloc_aligned", It is
strange that if I did not use "clib_mem_alloc_aligned" but with "malloc", the
problem is still there but less happened. Sometimes it occurs, but sometimes
it's ok.
Here is the code I worte for mips32.
uword clib_calljmp (uword (*func) (uword func_arg), uword func_arg, void *stack)
{
unsigned long ret=0;
__asm__ volatile (
".set push \n"
"move $23, $29\n"
"li $9, 4\n\t"
"subu $8, %3, $9\n\t"
"sll $8, $8, 0\n\t"
"move $29, $8\n\t"
"move $9, %1\n\t"
"move $4, %2\n\t"
"move $25,$9\n\t"
"move $22, $31\n\t"
"jalr.hb $25\n\t"
"nop\n\t"
"move %0, $2\n\t"
"move $29,$23\n"
"move $31, $22\n\t"
".set pop\n"
:"=r"(ret)
:"r"(func),"r"(func_arg),"r"(stack)
:"$8","$9","$23","$22"
);
return ret;
}
Thanks,
Xinying Xue
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