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Second attempt to integrate Paul K's changes.

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This commit is contained in:
Jordan K. Hubbard 1993-12-02 01:03:47 +00:00
parent 88ac367bd7
commit 1e503f71fb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=822
2 changed files with 112 additions and 2 deletions
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57
gnu/usr.bin/ld/rtld/rtld.c
View File

@ -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 1.5 1993/11/30 20:47:49 jkh Exp $
* $Id: rtld.c,v 1.4 1993/11/22 19:05:27 jkh Exp $
*/
#include <machine/vmparam.h>
@ -1031,6 +1031,7 @@ char *fmt;
va_end(ap);
}
#if 1
caddr_t
sbrk(incr)
int incr;
@ -1075,3 +1076,57 @@ xprintf("sbrk: incr = %#x, curbrk = %#x\n", incr, curbrk);
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,
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;
}
#endif

57
libexec/rtld-aout/rtld.c
View File

@ -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 1.5 1993/11/30 20:47:49 jkh Exp $
* $Id: rtld.c,v 1.4 1993/11/22 19:05:27 jkh Exp $
*/
#include <machine/vmparam.h>
@ -1031,6 +1031,7 @@ char *fmt;
va_end(ap);
}
#if 1
caddr_t
sbrk(incr)
int incr;
@ -1075,3 +1076,57 @@ xprintf("sbrk: incr = %#x, curbrk = %#x\n", incr, curbrk);
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,
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;
}
#endif