mirror of
https://github.com/tobast/libunwind-eh_elf.git
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90 lines
2.9 KiB
ArmAsm
90 lines
2.9 KiB
ArmAsm
/* libunwind - a platform-independent unwind library
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Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "offsets.h"
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.global _Ux86_getcontext
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.type _Ux86_getcontext, @function
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_Ux86_getcontext:
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.cfi_startproc
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pushl %eax
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mov 8(%esp),%eax /* ucontext_t* */
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popl FREEBSD_UC_MCONTEXT_EAX_OFF(%eax)
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movl %ebx, FREEBSD_UC_MCONTEXT_EBX_OFF(%eax)
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movl %ecx, FREEBSD_UC_MCONTEXT_ECX_OFF(%eax)
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movl %edx, FREEBSD_UC_MCONTEXT_EDX_OFF(%eax)
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movl %edi, FREEBSD_UC_MCONTEXT_EDI_OFF(%eax)
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movl %esi, FREEBSD_UC_MCONTEXT_ESI_OFF(%eax)
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movl %ebp, FREEBSD_UC_MCONTEXT_EBP_OFF(%eax)
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movl (%esp), %ecx
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movl %ecx, FREEBSD_UC_MCONTEXT_EIP_OFF(%eax)
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leal 4(%esp), %ecx /* Exclude the return address. */
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movl %ecx, FREEBSD_UC_MCONTEXT_ESP_OFF(%eax)
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xorl %ecx, %ecx
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movw %fs, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_FS_OFF(%eax)
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movw %gs, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_GS_OFF(%eax)
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movw %ds, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_DS_OFF(%eax)
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movw %es, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_ES_OFF(%eax)
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movw %ss, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_SS_OFF(%eax)
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movw %cs, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_CS_OFF(%eax)
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pushfl
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popl FREEBSD_UC_MCONTEXT_EFLAGS_OFF(%eax)
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movl $0, FREEBSD_UC_MCONTEXT_TRAPNO_OFF(%eax)
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#if 0
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movl $FREEBSD_UC_MCONTEXT_FPOWNED_FPU,\
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FREEBSD_UC_MCONTEXT_OWNEDFP_OFF(%eax)
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movl $FREEBSD_UC_MCONTEXT_FPFMT_XMM,\
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FREEBSD_UC_MCONTEXT_FPFORMAT_OFF(%eax)
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/* Require CPU with fxsave implemented, and enabled by OS. */
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fxsave FREEBSD_UC_MCONTEXT_FPSTATE_OFF(%eax)
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#else
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movl $FREEBSD_UC_MCONTEXT_FPOWNED_NONE,\
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FREEBSD_UC_MCONTEXT_OWNEDFP_OFF(%eax)
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movl $FREEBSD_UC_MCONTEXT_FPFMT_NODEV,\
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FREEBSD_UC_MCONTEXT_FPFORMAT_OFF(%eax)
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#endif
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movl $FREEBSD_UC_MCONTEXT_MC_LEN_VAL,\
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FREEBSD_UC_MCONTEXT_MC_LEN_OFF(%eax)
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xorl %eax, %eax
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ret
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.cfi_endproc
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.size _Ux86_getcontext, . - _Ux86_getcontext
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/* We do not need executable stack. */
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.section .note.GNU-stack,"",@progbits
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