+/* Invokes syscall NUMBER, passing no arguments, and returns the
+ return value as an `int'. */
+#define syscall0(NUMBER) \
+ ({ \
+ int retval; \
+ asm volatile \
+ ("push %[number]; int 0x30; add %%esp, 4" \
+ : "=a" (retval) \
+ : [number] "i" (NUMBER) \
+ : "memory"); \
+ retval; \
+ })
+
+/* Invokes syscall NUMBER, passing argument ARG0, and returns the
+ return value as an `int'. */
+#define syscall1(NUMBER, ARG0) \
+ ({ \
+ int retval; \
+ asm volatile \
+ ("push %[arg0]; push %[number]; int 0x30; add %%esp, 8" \
+ : "=a" (retval) \
+ : [number] "i" (NUMBER), \
+ [arg0] "g" (ARG0) \
+ : "memory"); \
+ retval; \
+ })
+
+/* Invokes syscall NUMBER, passing arguments ARG0 and ARG1, and
+ returns the return value as an `int'. */
+#define syscall2(NUMBER, ARG0, ARG1) \
+ ({ \
+ int retval; \
+ asm volatile \
+ ("push %[arg1]; push %[arg0]; " \
+ "push %[number]; int 0x30; add %%esp, 12" \
+ : "=a" (retval) \
+ : [number] "i" (NUMBER), \
+ [arg0] "g" (ARG0), \
+ [arg1] "g" (ARG1) \
+ : "memory"); \
+ retval; \
+ })
+
+/* Invokes syscall NUMBER, passing arguments ARG0, ARG1, and
+ ARG2, and returns the return value as an `int'. */
+#define syscall3(NUMBER, ARG0, ARG1, ARG2) \
+ ({ \
+ int retval; \
+ asm volatile \
+ ("push %[arg2]; push %[arg1]; push %[arg0]; " \
+ "push %[number]; int 0x30; add %%esp, 16" \
+ : "=a" (retval) \
+ : [number] "i" (NUMBER), \
+ [arg0] "g" (ARG0), \
+ [arg1] "g" (ARG1), \
+ [arg2] "g" (ARG2) \
+ : "memory"); \
+ retval; \
+ })
+