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/* Copyright (C) 2003 Red Hat, Inc.
* Contributed by Alexandre Oliva <aoliva@redhat.com>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
/* The function below is tail-called by resolver stubs when a
lazily-bound function is called. It must preserve all
registers that could be used to pass arguments to the actual
function. Upon _dl_linux_resolve entry, GR14 holds the
address of a lazy PLT entry, so @(GR14,-4) is the lazy
relocation number that we have to pass to _dl_linux_resolver.
GR15 holds the caller's GOT, from which we extract the
elf_resolve* that _dl_linux_resolver needs as well.
_dl_linux_resolver() figures out where the jump symbol is
_really_ supposed to have jumped to and returns that to us.
Once we have that, we prepare to tail-call the actual
function, clean up after ourselves, restoring the original
arguments, then jump to the fixed up address. */
.text
.p2align 4
.hidden _dl_linux_resolve
.global _dl_linux_resolve
.type _dl_linux_resolve,@function
_dl_linux_resolve:
/* Preserve arguments. */
addi sp, -8*4, sp
stdi gr8, @(sp, 8)
stdi gr10, @(sp, 16)
stdi gr12, @(sp, 24)
movsg lr,gr8
st gr8, @(sp,gr0)
/* Prepare to call _dl_linux_resolver. */
ldi @(gr15, 8), gr8
ldi @(gr14, -4), gr9
mov.p gr5, gr15
call _dl_linux_resolver
/* Move aside return value that contains the FUNCDESC_VALUE. */
ldd @(gr8,gr0),gr14
/* Restore arguments. */
ld @(sp, gr0), gr8
movgs gr8,lr
lddi @(sp, 24), gr12
lddi @(sp, 16), gr10
lddi @(sp, 8), gr8
addi sp, 8*4, sp
/* Now jump to the actual function. */
jmpl @(gr14, gr0)
.size _dl_linux_resolve, . - _dl_linux_resolve
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