- added syscall read

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git-svn-id: http://moon:8086/svn/vhdl/trunk@786 cc03376c-175c-47c8-b038-4cd826a8556b

lib/CPUs/MIPS/bsp/examples/libsys/syscalls.c

@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include "libsys.h"
 #include "xcpt.h"
 
@@ -39,7 +40,7 @@ char *itoa(int i)
 int syscalls_handler(struct xcptcontext * xcp)
 {
 	int syscall_code;
-	char *pStr;
+	char *pStr, buf[33];
 
 	syscall_code = xcp->regs[2];
 
@@ -54,8 +55,22 @@ int syscalls_handler(struct xcptcontext * xcp)
 		sputs(pStr);
 		break;
 
+		case 5:		// read integer
+		pStr = fgets(buf, sizeof(buf), stdin);
+		xcp->regs[2] = atoi(pStr);
+		break;
+
+		case 8:		// read string
+		pStr = (char*)xcp->regs[4];
+		fgets(pStr, xcp->regs[5], stdin);
+		break;
+
+		case 10:		// exit
+		_exit(0);
+		break;
+
 		default:
-		sputs("Unknown syscall (");print_word(syscall_code);sputs(") at ");print_word(xcp->epc);sputs("\n");
+		sputs("\nUnknown syscall (");print_word(syscall_code);sputs(") at ");print_word(xcp->epc);sputs("\n");
 		break;
 	}