| 123456789101112131415161718192021222324252627282930313233343536373839404142 |
- /*
- * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
- * Here we can supply some information useful to userland.
- */
- #include <linux/version.h>
- #include <linux/elfnote.h>
- /* Ideally this would use UTS_NAME, but using a quoted string here
- doesn't work. Remember to change this when changing the
- kernel's name. */
- ELFNOTE_START(Linux, 0, "a")
- .long LINUX_VERSION_CODE
- ELFNOTE_END
- #ifdef CONFIG_XEN
- /*
- * Add a special note telling glibc's dynamic linker a fake hardware
- * flavor that it will use to choose the search path for libraries in the
- * same way it uses real hardware capabilities like "mmx".
- * We supply "nosegneg" as the fake capability, to indicate that we
- * do not like negative offsets in instructions using segment overrides,
- * since we implement those inefficiently. This makes it possible to
- * install libraries optimized to avoid those access patterns in someplace
- * like /lib/i686/tls/nosegneg. Note that an /etc/ld.so.conf.d/file
- * corresponding to the bits here is needed to make ldconfig work right.
- * It should contain:
- * hwcap 1 nosegneg
- * to match the mapping of bit to name that we give here.
- */
- /* Bit used for the pseudo-hwcap for non-negative segments. We use
- bit 1 to avoid bugs in some versions of glibc when bit 0 is
- used; the choice is otherwise arbitrary. */
- #define VDSO_NOTE_NONEGSEG_BIT 1
- ELFNOTE_START(GNU, 2, "a")
- .long 1, 1<<VDSO_NOTE_NONEGSEG_BIT /* ncaps, mask */
- .byte VDSO_NOTE_NONEGSEG_BIT; .asciz "nosegneg" /* bit, name */
- ELFNOTE_END
- #endif
|
