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/* Xtensa dynamic resolver.
Parts copied from glibc/sysdeps/xtensa/dl-trampoline.S
Copyright (C) 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#define MIN_FRAME_SIZE 32
#ifdef __XTENSA_EB__
#define XTENSA_IMM12_FLD_OFFSET 8
#else /* __XTENSA_EL__ */
#define XTENSA_IMM12_FLD_OFFSET 12
#endif /* __XTENSA_EL__ */
.text
.align 4
.literal_position
.global _dl_linux_resolve
.type _dl_linux_resolve, @function
_dl_linux_resolve:
#if defined(__XTENSA_WINDOWED_ABI__)
/* Call the fixup function. */
movi a8, _dl_linux_resolver
callx8 a8
/* Extract the target's frame size from the ENTRY instruction. */
l32i a11, a10, 0
extui a11, a11, XTENSA_IMM12_FLD_OFFSET, 12
slli a11, a11, 3
addi a11, a11, -MIN_FRAME_SIZE
sub a11, sp, a11
movsp sp, a11
/* Jump to the next instruction past the ENTRY. */
addi a10, a10, 3
jx a10
#elif defined(__XTENSA_CALL0_ABI__)
/* Reserve stack space and save incoming arguments. */
addi a1, a1, -32
s32i a0, a1, 0
s32i a2, a1, 8
s32i a3, a1, 12
s32i a4, a1, 16
s32i a5, a1, 20
s32i a6, a1, 24
s32i a7, a1, 28
/* Move arguments for the _dl_linux_resolver to proper registers. */
mov a2, a10
mov a3, a11
/* Call the fixup function. */
movi a0, _dl_linux_resolver
callx0 a0
mov a10, a2
/* Restore incoming arguments from stack and deallocate reservation. */
l32i a0, a1, 0
l32i a2, a1, 8
l32i a3, a1, 12
l32i a4, a1, 16
l32i a5, a1, 20
l32i a6, a1, 24
l32i a7, a1, 28
addi a1, a1, 32
/* Jump to the target function. */
jx a10
#else
#error Unsupported Xtensa ABI
#endif
.size _dl_linux_resolve, . - _dl_linux_resolve
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