2018-10-23 18:38:32 +00:00
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/* PLT trampolines. ARC version.
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2021-01-02 19:32:25 +00:00
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Copyright (C) 2020-2021 Free Software Foundation, Inc.
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2018-10-23 18:38:32 +00:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <libc-symbols.h>
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#include <sysdep.h>
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#include <sys/syscall.h>
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/* resolver has atypical calling ABI (r11 and r12)
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PLTn which lands us here, sets up
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r11 = Module info (tpnt pointer as expected by resolver)
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r12 = PC of the PLTn itself - needed by resolver to find
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corresponding .rela.plt entry. */
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ENTRY (_dl_runtime_resolve)
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/* save args to func being resolved before entering resolver. */
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push_s r0
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push_s r1
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push_s r2
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push_s r3
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st.a r4, [sp, -4]
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st.a r5, [sp, -4]
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st.a r6, [sp, -4]
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st.a r7, [sp, -4]
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st.a r8, [sp, -4]
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st.a r9, [sp, -4]
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cfi_adjust_cfa_offset (40)
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push_s blink
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (blink, 0)
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mov_s r1, r12
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bl.d _dl_fixup
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mov r0, r11
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/* restore regs back. */
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ld.ab blink,[sp, 4]
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cfi_adjust_cfa_offset (-4)
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cfi_restore (blink)
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ld.ab r9, [sp, 4]
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ld.ab r8, [sp, 4]
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ld.ab r7, [sp, 4]
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ld.ab r6, [sp, 4]
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ld.ab r5, [sp, 4]
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ld.ab r4, [sp, 4]
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pop_s r3
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pop_s r2
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pop_s r1
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cfi_adjust_cfa_offset (-36)
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j_s.d [r0] /* r0 has resolved function addr. */
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pop_s r0 /* restore first arg to resolved call. */
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r0)
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END (_dl_runtime_resolve)
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