diff options
Diffstat (limited to 'libexec/rtld-aout')
-rw-r--r-- | libexec/rtld-aout/rtld.c | 102 |
1 files changed, 8 insertions, 94 deletions
diff --git a/libexec/rtld-aout/rtld.c b/libexec/rtld-aout/rtld.c index 10c5069..f5e3bff 100644 --- a/libexec/rtld-aout/rtld.c +++ b/libexec/rtld-aout/rtld.c @@ -27,7 +27,7 @@ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * - * $Id: rtld.c,v 1.7 1993/12/02 01:03:26 jkh Exp $ + * $Id: rtld.c,v 1.8 1993/12/04 00:53:16 jkh Exp $ */ #include <machine/vmparam.h> @@ -384,7 +384,7 @@ again: fatal("Cannot map %s text\n", path); if (mmap(addr + hdr.a_text, hdr.a_data, - PROT_READ|PROT_WRITE|PROT_EXEC, + PROT_READ|PROT_WRITE, MAP_FILE|MAP_FIXED|MAP_COPY, fd, hdr.a_text) == (caddr_t)-1) fatal("Cannot map %s data", path); @@ -397,7 +397,7 @@ again: perror("/dev/zero"); #endif if (hdr.a_bss && mmap(addr + hdr.a_text + hdr.a_data, hdr.a_bss, - PROT_READ|PROT_WRITE|PROT_EXEC, + PROT_READ|PROT_WRITE, MAP_ANON|MAP_FIXED|MAP_COPY, fd, hdr.a_text + hdr.a_data) == (caddr_t)-1) fatal("Cannot map %s bss", path); @@ -990,26 +990,6 @@ char *sym; static caddr_t curbrk; -static void -init_brk() -{ - struct rlimit rlim; - char *cp, **cpp = environ; - - if (getrlimit(RLIMIT_STACK, &rlim) < 0) { - xprintf("ld.so: brk: getrlimit failure\n"); - _exit(1); - } - - if (environ < USRSTACK - MAXSSIZ) { - curbrk = (caddr_t) - (((long)(USRSTACK - MAXSSIZ - rlim.rlim_cur) + PAGSIZ) & ~(PAGSIZ - 1)); - } else { - curbrk = (caddr_t) - (((long)(USRSTACK - rlim.rlim_cur) + PAGSIZ) & ~(PAGSIZ - 1)) ; - } -} - void #if __STDC__ xprintf(char *fmt, ...) @@ -1031,24 +1011,18 @@ char *fmt; va_end(ap); } -#if 1 caddr_t sbrk(incr) int incr; { int fd = -1; - caddr_t oldbrk; - if (curbrk == 0) - init_brk(); + /* Round-up increment to page size */ + incr = ((incr + PAGSIZ - 1) & ~(PAGSIZ - 1)); #if DEBUG xprintf("sbrk: incr = %#x, curbrk = %#x\n", incr, curbrk); #endif - if (incr == 0) - return curbrk; - - incr = (incr + PAGSIZ - 1) & ~(PAGSIZ - 1); #ifdef NEED_DEV_ZERO fd = open("/dev/zero", O_RDWR, 0); @@ -1056,77 +1030,17 @@ xprintf("sbrk: incr = %#x, curbrk = %#x\n", incr, curbrk); perror("/dev/zero"); #endif - if (mmap(curbrk, incr, - PROT_READ|PROT_WRITE, - MAP_ANON|MAP_FIXED|MAP_COPY, fd, 0) == (caddr_t)-1) { - xprintf("Cannot map anonymous memory"); - _exit(1); - } - -#ifdef NEED_DEV_ZERO - close(fd); -#endif - - oldbrk = curbrk; -#if TRY_THIS_FOR_A_CHANGE - curbrk -= incr; -#else - curbrk += incr; -#endif - - return oldbrk; -} - -#else - -caddr_t -sbrk(incr) -int incr; -{ - int fd = -1; - caddr_t oldbrk; - -xprintf("sbrk: incr = %#x, curbrk = %#x\n", incr, curbrk); -#if DEBUG -xprintf("sbrk: incr = %#x, curbrk = %#x\n", incr, curbrk); -#endif - if (curbrk == 0 && (curbrk = mmap(0, PAGSIZ, + if ((curbrk = mmap(0, incr, PROT_READ|PROT_WRITE, MAP_ANON|MAP_COPY, fd, 0)) == (caddr_t)-1) { xprintf("Cannot map anonymous memory"); _exit(1); } - /* There's valid memory from `curbrk' to next page boundary */ - if ((long)curbrk + incr <= (((long)curbrk + PAGSIZ) & ~(PAGSIZ - 1))) { - oldbrk = curbrk; - curbrk += incr; - return oldbrk; - } - /* - * If asking for than currently left in this chunk, - * go somewhere completely different. - */ - -#ifdef NEED_DEV_ZERO - fd = open("/dev/zero", O_RDWR, 0); - if (fd == -1) - perror("/dev/zero"); -#endif - - if ((curbrk = mmap(0, incr, - PROT_READ|PROT_WRITE, - MAP_ANON|MAP_COPY, fd, 0)) == (caddr_t)-1) { - perror("Cannot map anonymous memory"); - } - #ifdef NEED_DEV_ZERO close(fd); #endif - oldbrk = curbrk; - curbrk += incr; - - return oldbrk; + return(curbrk); } -#endif + |