Fix bug in 'as command' not showing the right syscall ##analysis

Author: trufae

libr/core/cmd_anal.inc.c

@@ -2329,10 +2329,10 @@ R_API char *cmd_syscall_dostr(RCore *core, st64 n, ut64 addr) {
 	char str[64], snstr[32];
 	st64 N = n;
 	int defVector = r_syscall_get_swi (core->anal->syscall);
-	if (defVector > 0) {
+	if (addr != UT64_MAX && defVector > 0) {
 		n = -1;
 	}
-	if (n == -1 || defVector > 0) {
+	if (n == -1) {
 		n = (int)r_debug_reg_get (core->dbg, "oeax");
 		if (!n || n == -1) {
 			n = r_debug_reg_get (core->dbg, "SN");

test/db/anal/syscalls

@@ -17,3 +17,25 @@ EXPECT=<<EOF
 EOF
 EXPECT_ERR=
 RUN
+
+NAME=as <num> honors user argument
+FILE=-
+CMDS=<<EOF
+-a x86
+-b 64
+-e asm.os=linux
+as 0
+as 1
+as 2
+as 4
+as write
+EOF
+EXPECT=<<EOF
+0 = read (0, 0x00000000, 0)
+1 = write (0, "", 0)
+2 = open ("", 0x00000000, 0x00000000)
+4 = stat (0x00000000, 0x00000000)
+1 = write (0, "", 0)
+EOF
+EXPECT_ERR=
+RUN