[PATCH] RFC: reduce static data usage

[Denis Vlasenko]

Hi,

[hopefully this mail is under ml size limit]

These six patches make uclibc malloc big(ger) buffers instead of
keeping them in data/bss - should help NOMMU people.

patch #1: introduce __uc_malloc, so that users can intercept OOM.
patch #2: convert des.c to use __uc_malloc (-70 kbytes of bss)
patch #3: convert resolv.c
patch #4: convert pwd_grp.c
patch #5: convert utent.c, getpass.c
patch #6: convert getnetent.c, md5.c

This deals with almost all buffers bigger than 100 bytes.
We pay in code size for that (+20 - +40 bytes per module
on i386):

    text data   bss   dec   hex filename
-    584    8   384   976   3d0 utent.o
+    611    8     4   623   26f utent.o
-     38    0   288   326   146 fgetgrent.o
+     63    0     4    67    43 fgetgrent.o
-     38    0   288   326   146 fgetpwent.o
+     63    0     4    67    43 fgetpwent.o
-     38    0   320   358   166 fgetspent.o
+     63    0     4    67    43 fgetspent.o
-     34    0   288   322   142 getgrent.o
+     59    0     4    63    3f getgrent.o
-     38    0   288   326   146 getgrgid.o
+     63    0     4    67    43 getgrgid.o
-     38    0   288   326   146 getgrnam.o
+     63    0     4    67    43 getgrnam.o
-     34    0   288   322   142 getpwent.o
+     59    0     4    63    3f getpwent.o
-     38    0   288   326   146 getpwnam.o
+     63    0     4    67    43 getpwnam.o
-     38    0   288   326   146 getpwuid.o
+     63    0     4    67    43 getpwuid.o
-     34    0   320   354   162 getspent.o
+     59    0     4    63    3f getspent.o
-     38    0   320   358   166 getspnam.o
+     63    0     4    67    43 getspnam.o
-     38    0   320   358   166 sgetspent.o
+     40    0     4    44    2c sgetspent.o
-    458    0   172   630   276 getnetent.o
+    496    0     8   504   1f8 getnetent.o
-     45    0   480   525   20d gethostbyname.o
+     66    0     4    70    46 gethostbyname.o
-     53    0   492   545   221 gethostbyaddr.o
+     74    0     4    78    4e gethostbyaddr.o
-     49    0   492   541   21d gethostbyname2.o
+     70    0     4    74    4a gethostbyname2.o
-    189    0   168   357   165 gethostent.o
+    210    0    12   222    de gethostent.o
-    314    0   256   570   23a getpass.o
+    343    0     4   347   15b getpass.o
-   4097    0 70240 74337 12261 des.o
+   4391    0     8  4399  112f des.o
-   1921    0   160  2081   821 md5.o
+   1857    0     4  1861   745 md5.o

--
vda
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