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mmap

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This commit is contained in:
Masamichi Takagi m-takagi@ab.jp.nec.com
2012-10-03 10:54:44 +09:00
parent ec637d3c2b
commit 1feff07975
1 changed files with 28 additions and 0 deletions
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28
linux/executer/mcexec.c
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@ -575,6 +575,34 @@ int main_loop(int fd, int cpu)
cpu, ret, 1, (unsigned long)dma_buf, w.sr.args[0],
sizeof(struct utsname));
break;
case __NR_mmap: {
// w.sr.args[0] is converted to MIC physical address
printf("mcexec.c,mmap,MIC-paddr=%lx,len=%lx,prot=%lx,flags=%lx,fd=%lx,offset=%lx\n",
w.sr.args[0], w.sr.args[1], w.sr.args[2], w.sr.args[3], w.sr.args[4], w.sr.args[5]);
off_t old_off = lseek(w.sr.args[4], 0, SEEK_CUR);
if(old_off == -1) { printf("mcexec.c,mmap,lseek failed\n"); ret = -errno; goto mmap_out; }
off_t rlseek = lseek(w.sr.args[4], w.sr.args[5], SEEK_SET);
if(rlseek == -1) { printf("mcexec.c,mmap,lseek failed\n"); ret = -errno; goto mmap_out; }
ssize_t toread = w.sr.args[1];
ret = 0;
while(toread > 0) {
printf("mcexec.c,mmap,read,addr=%lx,len=%lx\n", (long int)((void *)dma_buf + w.sr.args[1] - toread), toread);
ssize_t rread = read(w.sr.args[4], (void *)dma_buf + w.sr.args[1] - toread, toread);
if(rread == 0) {
printf("mcexec.c,mmap,read==0\n");
goto mmap_zero_out;
} else if(rread < 0) {
printf("mcexec.c,mmap,read failed\n"); ret = -errno; break;
}
toread -= rread;
}
mmap_zero_out:
rlseek = lseek(w.sr.args[4], old_off, SEEK_SET);
if(rlseek == -1) { printf("mcexec.c,mmap,lseek failed\n"); ret = -errno; }
mmap_out:
do_syscall_return(fd, cpu, ret, 1, (unsigned long)dma_buf, w.sr.args[0], w.sr.args[1]);
break; }
default:
printf("Unhandled system calls: %ld\n", w.sr.number);
break;