_arg1; \
})
+char **environ __attribute__((weak));
+
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void)
{
"slli a2, a0, "PTRLOG"\n" // envp (a2) = SZREG*argc ...
"add a2, a2, "SZREG"\n" // + SZREG (skip null)
"add a2,a2,a1\n" // + argv
+ "lui a3, %hi(environ)\n" // a3 = &environ (high bits)
+ "sd a2,%lo(environ)(a3)\n" // store envp(a2) into environ
"andi sp,a1,-16\n" // sp must be 16-byte aligned
"call main\n" // main() returns the status code, we'll exit with it.
"li a7, 93\n" // NR_exit == 93