| .. | .. |
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| 16 | 16 | ELFNOTE_END |
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| 17 | 17 | |
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| 18 | 18 | BUILD_SALT |
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| 19 | | - |
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| 20 | | -#ifdef CONFIG_XEN |
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| 21 | | -/* |
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| 22 | | - * Add a special note telling glibc's dynamic linker a fake hardware |
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| 23 | | - * flavor that it will use to choose the search path for libraries in the |
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| 24 | | - * same way it uses real hardware capabilities like "mmx". |
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| 25 | | - * We supply "nosegneg" as the fake capability, to indicate that we |
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| 26 | | - * do not like negative offsets in instructions using segment overrides, |
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| 27 | | - * since we implement those inefficiently. This makes it possible to |
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| 28 | | - * install libraries optimized to avoid those access patterns in someplace |
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| 29 | | - * like /lib/i686/tls/nosegneg. Note that an /etc/ld.so.conf.d/file |
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| 30 | | - * corresponding to the bits here is needed to make ldconfig work right. |
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| 31 | | - * It should contain: |
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| 32 | | - * hwcap 1 nosegneg |
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| 33 | | - * to match the mapping of bit to name that we give here. |
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| 34 | | - * |
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| 35 | | - * At runtime, the fake hardware feature will be considered to be present |
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| 36 | | - * if its bit is set in the mask word. So, we start with the mask 0, and |
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| 37 | | - * at boot time we set VDSO_NOTE_NONEGSEG_BIT if running under Xen. |
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| 38 | | - */ |
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| 39 | | - |
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| 40 | | -#include "../../xen/vdso.h" /* Defines VDSO_NOTE_NONEGSEG_BIT. */ |
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| 41 | | - |
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| 42 | | -ELFNOTE_START(GNU, 2, "a") |
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| 43 | | - .long 1 /* ncaps */ |
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| 44 | | -VDSO32_NOTE_MASK: /* Symbol used by arch/x86/xen/setup.c */ |
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| 45 | | - .long 0 /* mask */ |
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| 46 | | - .byte VDSO_NOTE_NONEGSEG_BIT; .asciz "nosegneg" /* bit, name */ |
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| 47 | | -ELFNOTE_END |
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| 48 | | -#endif |
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