use syscall to call the function to report an error. The following code shows whether there is something wrong with my writing
-sharpinclude <stdio.h>
-sharpinclude <fcntl.h>
-sharpinclude <unistd.h>
-sharpinclude <sys/syscall.h>
-sharpinclude <sys/types.h>
-sharpinclude <unistd.h>
-sharpinclude <sys/mman.h>
int main(){
int size = 10;
int fd = open ("test.txt", O_RDONLY);
// //
char *f1 = (char *) mmap( 0, size, PROT_READ, MAP_PRIVATE, fd, 0);
printf("[1] mmap result : %s", f1);
// //
char *f2 = (char *) syscall(SYS_mmap, 0, size, PROT_READ, MAP_PRIVATE, fd, 0);
printf("[2] mmap result : %s", f2);
// int fd_ = syscall(SYS_open, "test.txt", 0);
// printf("%d ----", fd_);
return 0;
}or can you provide a helloworld reference for syscall calling mmap. Thank you-sharp-sharp-sharp problem description
the environmental background of the problems and what methods you have tried
related codes
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