The following code is similar to the code shown in Practice problem 3.48 of page 288.

#include  #include  #include  #include  int len(char *s) { return strlen(s); } void lptoa(char *s, long *p) { long val = *p; sprintf(s,"%ld",val); } long longlen(long x) { long v; char buf[8]; v = x; lptoa(buf,&v); return len(buf); } int main() { longlen(INT_MAX-1); } 

Compile the code with and without stack protector.

Fill the table with appropriate values. Leave the entries empty if not applicable.

		no stack protector	stack protector
gcc flag
len	assembly for allocating stack
	stack size in decimal
	assembly for freeing stack
lptoa	assembly for allocating stack
	stack size in decimal
	assembly for freeing stack
	"char *s" address relative to rsp after entering lptoa
	"long *p" address relative to rsp after entering lptoa
	"val" address relative to rsp after entering lptoa
longlen	assembly for allocating stack
	stack size in decimal
	assembly for freeing stack
	"x" address relative to rsp after entering longlen
	"v" address relative to rsp after entering longlen
	"buf" address relative to rsp after entering longlen
	canary register name
	canary address relative to rsp
	canary value
	assembly for erasing canary value
	assembly for canary cross check