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