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libio: Fix oversized __io_vtables

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IO_VTABLES_LEN is the size of the struct array in bytes, not the number
of __IO_jump_t's in the array. Drops just under 384kb from .rodata on
LP64 machines.

Fixes: 3020f72618 ("libio: Remove the usage of __libc_IO_vtables")
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Tested-by: Florian Weimer <fweimer@redhat.com>
This commit is contained in:
Adam Jackson 2023-09-08 15:55:19 -04:00 • committed by Florian Weimer
parent deeaa5e90f
commit 8cb69e0543
1 changed files with 4 additions and 1 deletions
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5
libio/vtables.c
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@ -20,6 +20,7 @@
#include <libioP.h> #include <libioP.h>
#include <stdio.h> #include <stdio.h>
#include <ldsodefs.h> #include <ldsodefs.h>
#include <array_length.h>
#include <pointer_guard.h> #include <pointer_guard.h>
#include <libio-macros.h> #include <libio-macros.h>
@ -88,7 +89,7 @@
# pragma weak __wprintf_buffer_as_file_xsputn # pragma weak __wprintf_buffer_as_file_xsputn
#endif #endif
const struct _IO_jump_t __io_vtables[IO_VTABLES_LEN] attribute_relro = const struct _IO_jump_t __io_vtables[] attribute_relro =
{ {
/* _IO_str_jumps */ /* _IO_str_jumps */
[IO_STR_JUMPS] = [IO_STR_JUMPS] =
@ -485,6 +486,8 @@ const struct _IO_jump_t __io_vtables[IO_VTABLES_LEN] attribute_relro =
}, },
#endif #endif
}; };
_Static_assert (array_length (__io_vtables) == IO_VTABLES_NUM,
"initializer count");
#ifdef SHARED #ifdef SHARED