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97 lines
2.4 KiB
ArmAsm
97 lines
2.4 KiB
ArmAsm
/* i386 support code for fibers and multithreading.
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Copyright (C) 2019 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "../common/threadasm.S"
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#if defined(__i386__)
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.text
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.globl CSYM(fiber_switchContext)
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.type CSYM(fiber_switchContext), @function
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.align 16
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CSYM(fiber_switchContext):
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.cfi_startproc
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// save current stack state
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push %ebp
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mov %esp, %ebp
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push %edi
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push %esi
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push %ebx
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push %eax
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// store oldp again with more accurate address
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mov 8(%ebp), %eax
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mov %esp, (%eax)
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// load newp to begin context switch
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mov 12(%ebp), %esp
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// load saved state from new stack
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pop %eax
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pop %ebx
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pop %esi
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pop %edi
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pop %ebp
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// 'return' to complete switch
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ret
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.cfi_endproc
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.size CSYM(fiber_switchContext),.-CSYM(fiber_switchContext)
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#elif defined(__x86_64__) && !defined(__ILP32__)
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.text
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.globl CSYM(fiber_switchContext)
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.type CSYM(fiber_switchContext), @function
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.align 16
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CSYM(fiber_switchContext):
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.cfi_startproc
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// Save current stack state.save current stack state
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push %rbp
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mov %rsp, %rbp
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push %rbx
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push %r12
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push %r13
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push %r14
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push %r15
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// store oldp again with more accurate address
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mov %rsp, (%rdi)
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// load newp to begin context switch
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mov %rsi, %rsp
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// load saved state from new stack
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pop %r15
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pop %r14
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pop %r13
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pop %r12
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pop %rbx
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pop %rbp
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// 'return' to complete switch
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ret
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.cfi_endproc
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.size CSYM(fiber_switchContext),.-CSYM(fiber_switchContext)
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#endif
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