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2012-02-11 Magnus Granberg <zorry@gentoo.org>
PR52194
* gcc/c-pch.c (c_common_valid_pch) check for
Pax and RANDMMAP.
--- a/gcc/c-pch.c 2011-08-28 22:14:46.000000000 +0200
+++ b/gcc/c-pch.c 2012-02-11 17:10:23.158018580 +0100
@@ -36,6 +36,10 @@ along with GCC; see the file COPYING3.
#include "opts.h"
#include "timevar.h"
+#define FILE_BUFFER 256
+#define LINE_BUFFER 1024
+#define WORD_BUFFER 1024
+
/* This is a list of flag variables that must match exactly, and their
names for the error message. The possible values for *flag_var must
fit in a 'signed char'. */
@@ -240,6 +244,11 @@ c_common_valid_pch (cpp_reader *pfile, c
char ident[IDENT_LENGTH + 16];
const char *pch_ident;
struct c_pch_validity v;
+ FILE *f;
+ char file[FILE_BUFFER];
+ char line[LINE_BUFFER];
+ char word[WORD_BUFFER];
+ char value[WORD_BUFFER];
/* Perform a quick test of whether this is a valid
precompiled header for the current language. */
@@ -351,6 +360,29 @@ c_common_valid_pch (cpp_reader *pfile, c
}
}
+ /* FIXME: On PaX enabled kernel with RANDMMAP enabled we can't use
+ PCH. #PR52194 */
+
+ f = fopen ("/proc/self/status", "r");
+ if (f != NULL)
+ {
+ memset(file, 0, FILE_BUFFER);
+ while( fgets(line, LINE_BUFFER, f) )
+ {
+ sscanf(line, "%s %s", word, value);
+ if(!strcmp(word, "PaX:"))
+ {
+ if(value[3] == 'R')
+ {
+ cpp_error (pfile, CPP_DL_WARNING, "%s can't be used \
+ with PaX enabled kernel with RANDMMAP \
+ enabled.", name);
+ return 2;
+ }
+ }
+ }
+ }
+
/* Check the preprocessor macros are the same as when the PCH was
generated. */
|
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