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patches/glibc/ports-2.12.1/350-pre20040117-pt_pax.patch
author "Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>
Thu Jul 28 22:09:31 2011 +0200 (2011-07-28)
changeset 2573 424fa2092ace
permissions -rw-r--r--
scripts/libc: do not build add-ons by default

Currently, no --enable-add-ons option is passed to libc configure when
"$(do_libc_add_ons_list ,)" is empty, which makes configure automatically search
for present add-ons. In that case, all present add-ons are built, although
no add-on was selected by the user in the config. Moreover, this can make the
configure fail if some non-standard add-ons like eglibc-localedef are present.

This behavior also leads to an inconsistency from a user point of view between
the following cases:
- LIBC_ADDONS_LIST="", LIBC_GLIBC_USE_PORTS=n and THREADS="none" in the config,
which makes "$(do_libc_add_ons_list ,)" return "", so all present add-ons
are built.
- LIBC_ADDONS_LIST="", LIBC_GLIBC_USE_PORTS=n and THREADS!="none" in the
config, which makes "$(do_libc_add_ons_list ,)" return the add-on supporting
the chosen threading implementation, e.g. "nptl", so only this add-on is
built.

This patch disables the building of all add-ons in that case.

It is still possible to build all present add-ons by adding --enable-add-ons to
LIBC_GLIBC_EXTRA_CONFIG_ARRAY.

Signed-off-by: "Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com> 
     1 

     2 

     3 diff -durN glibc-2.12.1.orig/elf/elf.h glibc-2.12.1/elf/elf.h

     4 --- glibc-2.12.1.orig/elf/elf.h	2009-04-15 02:15:54.000000000 +0200

     5 +++ glibc-2.12.1/elf/elf.h	2009-11-13 00:50:35.000000000 +0100

     6 @@ -580,6 +580,7 @@

     7  #define PT_GNU_EH_FRAME	0x6474e550	/* GCC .eh_frame_hdr segment */

     8  #define PT_GNU_STACK	0x6474e551	/* Indicates stack executability */

     9  #define PT_GNU_RELRO	0x6474e552	/* Read-only after relocation */

    10 +#define PT_PAX_FLAGS	0x65041580	/* Indicates PaX flag markings */

    11  #define PT_LOSUNW	0x6ffffffa

    12  #define PT_SUNWBSS	0x6ffffffa	/* Sun Specific segment */

    13  #define PT_SUNWSTACK	0x6ffffffb	/* Stack segment */

    14 @@ -593,6 +594,18 @@

    15  #define PF_X		(1 << 0)	/* Segment is executable */

    16  #define PF_W		(1 << 1)	/* Segment is writable */

    17  #define PF_R		(1 << 2)	/* Segment is readable */

    18 +#define PF_PAGEEXEC	(1 << 4)	/* Enable  PAGEEXEC */

    19 +#define PF_NOPAGEEXEC	(1 << 5)	/* Disable PAGEEXEC */

    20 +#define PF_SEGMEXEC	(1 << 6)	/* Enable  SEGMEXEC */

    21 +#define PF_NOSEGMEXEC	(1 << 7)	/* Disable SEGMEXEC */

    22 +#define PF_MPROTECT	(1 << 8)	/* Enable  MPROTECT */

    23 +#define PF_NOMPROTECT	(1 << 9)	/* Disable MPROTECT */

    24 +#define PF_RANDEXEC	(1 << 10)	/* Enable  RANDEXEC */

    25 +#define PF_NORANDEXEC	(1 << 11)	/* Disable RANDEXEC */

    26 +#define PF_EMUTRAMP	(1 << 12)	/* Enable  EMUTRAMP */

    27 +#define PF_NOEMUTRAMP	(1 << 13)	/* Disable EMUTRAMP */

    28 +#define PF_RANDMMAP	(1 << 14)	/* Enable  RANDMMAP */

    29 +#define PF_NORANDMMAP	(1 << 15)	/* Disable RANDMMAP */

    30  #define PF_MASKOS	0x0ff00000	/* OS-specific */

    31  #define PF_MASKPROC	0xf0000000	/* Processor-specific */

    32
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