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- /*
- * utility to print the value of _stksize from gcc-cc1.ttp
- *
- * Usage: printstk [<filename>]
- * if <filename> is not specified defaults to .\gcc-cc1.ttp
- * ++jrb
- */
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <unixlib.h>
- #include <string.h>
- #include <st-out.h>
-
- long lseek(int, long, int);
-
- long find_offset (fd, fn)
- int fd;
- char *fn;
- {
- struct aexec head;
- struct asym sym;
-
- if(read(fd, &head, sizeof(head)) != sizeof(head))
- {
- perror(fn);
- exit(2);
- }
- if(head.a_magic != CMAGIC)
- {
- fprintf(stderr,"Invalid magic number %x\n", head.a_magic);
- exit(3);
- }
- if(head.a_syms == 0)
- {
- fprintf(stderr,"%s: no symbol table\n", fn);
- exit(4);
- }
- if(lseek(fd, head.a_text+head.a_data, 1) !=
- (head.a_text+head.a_data+sizeof(head)))
- {
- perror(fn);
- exit(5);
- }
- do {
- if(read(fd, &sym, sizeof(sym)) != sizeof(sym))
- {
- fprintf(stderr, "symbol _stksize not found\n");
- exit(6);
- }
- } while(strncmp("__stksiz", sym.a_name, 8) != 0);
-
- if( !(sym.a_type & A_DATA) )
- {
- fprintf(stderr, "symbol _stksize is undefined\n");
- exit(9);
- }
- return sym.a_value + sizeof(head);
- }
-
- int main(argc, argv)
- int argc;
- char **argv;
- {
- int fd;
- long stksize, offset;
- char fn[FILENAME_MAX];
-
- if(argc > 1)
- (void) strcpy(fn, *++argv);
- else
- (void) strcpy(fn, "gcc-cc1.ttp");
-
- if((fd = open(fn, 0)) < 0)
- {
- perror(fn);
- exit(1);
- }
-
- offset = find_offset(fd, fn);
-
- if(lseek(fd, offset, 0) != offset)
- {
- perror(fn);
- exit(7);
- }
- read(fd, &stksize, sizeof(long));
- printf("%s: stksize is %ld (%dK)\n", fn, stksize, (int)(stksize/1024));
-
- return close(fd);
- }
-
-