new helper funcs for alloca/malloc with mmu/nommu

The rpc rcmd code has some ugly ifdef mazes to handle mmu/nommu differences
just to select alloca or malloc.  Unify those with some helper macros in a
new header, and then convert the rcmd code over to it.

This is all geared towards fixing the getdents helper functions which only
use alloca() atm.  Now that we have helper functions, convert the getdents
functions over too.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Reviewed-by: Steven J. Magnani <steve@digidescorp.com>

1 files changed, 14 insertions, 46 deletions

diff --git a/libc/inet/rpc/rcmd.c b/libc/inet/rpc/rcmd.c
index 628c291fe..fb1bd9320 100644
--- a/libc/inet/rpc/rcmd.c
+++ b/libc/inet/rpc/rcmd.c
@@ -69,7 +69,6 @@ static char sccsid[] = "@(#)rcmd.c	8.3 (Berkeley) 3/26/94";
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
-#include <alloca.h>
 #include <signal.h>
 #include <fcntl.h>
 #include <netdb.h>
@@ -86,6 +85,7 @@ static char sccsid[] = "@(#)rcmd.c	8.3 (Berkeley) 3/26/94";
 #include <wchar.h>
 #endif
 #include <sys/uio.h>
+#include <bits/uClibc_alloc.h>
 
 
 /* some forward declarations */
@@ -116,11 +116,7 @@ int rcmd(char **ahost, u_short rport, const char *locuser, const char *remuser,
 
 #ifdef __UCLIBC_HAS_REENTRANT_RPC__
 	hstbuflen = 1024;
-#ifdef __ARCH_USE_MMU__
-	tmphstbuf = alloca (hstbuflen);
-#else
-	tmphstbuf = malloc (hstbuflen);
-#endif
+	tmphstbuf = stack_heap_alloc(hstbuflen);
 
 	while (gethostbyname_r (*ahost, &hostbuf, tmphstbuf,
 		    hstbuflen, &hp, &herr) != 0 || hp == NULL)
@@ -128,9 +124,7 @@ int rcmd(char **ahost, u_short rport, const char *locuser, const char *remuser,
 	    if (herr != NETDB_INTERNAL || errno != ERANGE)
 	    {
 		__set_h_errno (herr);
-#ifndef __ARCH_USE_MMU__
-		free(tmphstbuf);
-#endif
+		stack_heap_free(tmphstbuf);
 		herror(*ahost);
 		return -1;
 	    }
@@ -138,17 +132,11 @@ int rcmd(char **ahost, u_short rport, const char *locuser, const char *remuser,
 	    {
 		/* Enlarge the buffer.  */
 		hstbuflen *= 2;
-#ifdef __ARCH_USE_MMU__
-		tmphstbuf = alloca (hstbuflen);
-#else
-		free(tmphstbuf);
-		tmphstbuf = malloc (hstbuflen);
-#endif
+		stack_heap_free(tmphstbuf);
+		tmphstbuf = stack_heap_alloc(hstbuflen);
 	    }
 	}
-#ifndef __ARCH_USE_MMU__
-	free(tmphstbuf);
-#endif
+	stack_heap_free(tmphstbuf);
 #else /* call the non-reentrant version */
 	if ((hp = gethostbyname(*ahost)) == NULL) {
 	    return -1;
@@ -331,35 +319,23 @@ int ruserok(const char *rhost, int superuser, const char *ruser,
 
 #ifdef __UCLIBC_HAS_REENTRANT_RPC__
 	buflen = 1024;
-#ifdef __ARCH_USE_MMU__
-	buffer = alloca (buflen);
-#else
-	buffer = malloc (buflen);
-#endif
+	buffer = stack_heap_alloc(buflen);
 
 	while (gethostbyname_r (rhost, &hostbuf, buffer,
 		    buflen, &hp, &herr) != 0 || hp == NULL)
 	{
 	    if (herr != NETDB_INTERNAL || errno != ERANGE) {
-#ifndef __ARCH_USE_MMU__
-		free(buffer);
-#endif
+		stack_heap_free(buffer);
 		return -1;
 	    } else
 	    {
 		/* Enlarge the buffer.  */
 		buflen *= 2;
-#ifdef __ARCH_USE_MMU__
-		buffer = alloca (buflen);
-#else
-		free(buffer);
-		buffer = malloc (buflen);
-#endif
+		stack_heap_free(buffer);
+		buffer = stack_heap_alloc(buflen);
 	    }
 	}
-#ifndef __ARCH_USE_MMU__
-	free(buffer);
-#endif
+	stack_heap_free(buffer);
 #else
 	if ((hp = gethostbyname(rhost)) == NULL) {
 		return -1;
@@ -452,23 +428,15 @@ iruserok2 (u_int32_t raddr, int superuser, const char *ruser, const char *luser,
 #ifdef __UCLIBC_HAS_REENTRANT_RPC__
 		size_t buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
 		struct passwd pwdbuf;
-#ifdef __ARCH_USE_MMU__
-		char *buffer = alloca (buflen);
-#else
-		char *buffer = malloc (buflen);
-#endif
+		char *buffer = stack_heap_alloc(buflen);
 
 		if (getpwnam_r (luser, &pwdbuf, buffer,
 			    buflen, &pwd) != 0 || pwd == NULL)
 		{
-#ifndef __ARCH_USE_MMU__
-			free(buffer);
-#endif
+			stack_heap_free(buffer);
 			return -1;
 		}
-#ifndef __ARCH_USE_MMU__
-		free(buffer);
-#endif
+		stack_heap_free(buffer);
 #else
 		if ((pwd = getpwnam(luser)) == NULL)
 			return -1;