103 lines
3.4 KiB
ArmAsm
103 lines
3.4 KiB
ArmAsm
//===-- sysv_reenter.arm64.s ------------------------------------*- ASM -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of the ORC runtime support library.
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//
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//===----------------------------------------------------------------------===//
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// The content of this file is arm64-only
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#if defined(__arm64__) || defined(__aarch64__)
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.text
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// Saves GPRs, calls __orc_rt_resolve
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.globl __orc_rt_sysv_reenter
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__orc_rt_sysv_reenter:
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// Save register state, set up new stack frome.
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stp x27, x28, [sp, #-16]!
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stp x25, x26, [sp, #-16]!
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stp x23, x24, [sp, #-16]!
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stp x21, x22, [sp, #-16]!
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stp x19, x20, [sp, #-16]!
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stp x14, x15, [sp, #-16]!
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stp x12, x13, [sp, #-16]!
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stp x10, x11, [sp, #-16]!
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stp x8, x9, [sp, #-16]!
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stp x6, x7, [sp, #-16]!
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stp x4, x5, [sp, #-16]!
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stp x2, x3, [sp, #-16]!
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stp x0, x1, [sp, #-16]!
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stp q30, q31, [sp, #-32]!
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stp q28, q29, [sp, #-32]!
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stp q26, q27, [sp, #-32]!
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stp q24, q25, [sp, #-32]!
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stp q22, q23, [sp, #-32]!
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stp q20, q21, [sp, #-32]!
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stp q18, q19, [sp, #-32]!
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stp q16, q17, [sp, #-32]!
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stp q14, q15, [sp, #-32]!
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stp q12, q13, [sp, #-32]!
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stp q10, q11, [sp, #-32]!
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stp q8, q9, [sp, #-32]!
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stp q6, q7, [sp, #-32]!
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stp q4, q5, [sp, #-32]!
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stp q2, q3, [sp, #-32]!
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stp q0, q1, [sp, #-32]!
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// Look up the return address and subtract 8 from it (on the assumption
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// that it's a standard arm64 reentry trampoline) to get back the
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// trampoline's address.
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sub x0, x30, #8
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// Call __orc_rt_resolve to look up the implementation corresponding to
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// the calling stub, then store this in x17 (which we'll return to
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// below).
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#if !defined(__APPLE__)
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bl __orc_rt_resolve
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#else
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bl ___orc_rt_resolve
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#endif
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mov x17, x0
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// Restore the register state.
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ldp q0, q1, [sp], #32
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ldp q2, q3, [sp], #32
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ldp q4, q5, [sp], #32
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ldp q6, q7, [sp], #32
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ldp q8, q9, [sp], #32
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ldp q10, q11, [sp], #32
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ldp q12, q13, [sp], #32
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ldp q14, q15, [sp], #32
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ldp q16, q17, [sp], #32
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ldp q18, q19, [sp], #32
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ldp q20, q21, [sp], #32
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ldp q22, q23, [sp], #32
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ldp q24, q25, [sp], #32
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ldp q26, q27, [sp], #32
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ldp q28, q29, [sp], #32
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ldp q30, q31, [sp], #32
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ldp x0, x1, [sp], #16
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ldp x2, x3, [sp], #16
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ldp x4, x5, [sp], #16
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ldp x6, x7, [sp], #16
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ldp x8, x9, [sp], #16
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ldp x10, x11, [sp], #16
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ldp x12, x13, [sp], #16
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ldp x14, x15, [sp], #16
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ldp x19, x20, [sp], #16
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ldp x21, x22, [sp], #16
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ldp x23, x24, [sp], #16
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ldp x25, x26, [sp], #16
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ldp x27, x28, [sp], #16
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ldp x29, x30, [sp], #16
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// Return to the function implementation (rather than the stub).
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ret x17
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#endif // defined(__arm64__) || defined(__aarch64__)
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