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174 lines
6.2 KiB
174 lines
6.2 KiB
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#if defined(__i386__) && !MICROPY_NLR_SETJMP
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// We only need the functions here if we are on x86, and we are not
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// using setjmp/longjmp.
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//
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// For reference, x86 callee save regs are:
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// ebx, esi, edi, ebp, esp, eip
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// the offset of nlr_top within mp_state_ctx_t
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#define NLR_TOP_OFFSET (2 * 4)
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#if defined(_WIN32) || defined(__CYGWIN__)
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#define NLR_OS_WINDOWS
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#define NLR_TOP (_mp_state_ctx + NLR_TOP_OFFSET)
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#else
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#define NLR_TOP (mp_state_ctx + NLR_TOP_OFFSET)
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#endif
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// offset of nlr_top within mp_state_thread_t structure
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#define NLR_TOP_TH_OFF (0)
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.file "nlr.s"
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.text
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/**************************************/
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// mp_uint_t nlr_push(4(%esp)=nlr_buf_t *nlr)
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#if defined(NLR_OS_WINDOWS)
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.globl _nlr_push
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.def _nlr_push; .scl 2; .type 32; .endef
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_nlr_push:
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#else
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.globl nlr_push
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.type nlr_push, @function
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nlr_push:
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#endif
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mov 4(%esp), %edx # load nlr_buf
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mov (%esp), %eax # load return %ip
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mov %eax, 8(%edx) # store %ip into nlr_buf+8
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mov %ebp, 12(%edx) # store %bp into nlr_buf+12
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mov %esp, 16(%edx) # store %sp into nlr_buf+16
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mov %ebx, 20(%edx) # store %bx into nlr_buf+20
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mov %edi, 24(%edx) # store %di into nlr_buf
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mov %esi, 28(%edx) # store %si into nlr_buf
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#if !MICROPY_PY_THREAD
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mov NLR_TOP, %eax # load nlr_top
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mov %eax, (%edx) # store it
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mov %edx, NLR_TOP # stor new nlr_buf (to make linked list)
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#else
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// to check: stack is aligned to 16-byte boundary before this call
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call mp_thread_get_state # get mp_state_thread ptr into eax
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mov 4(%esp), %edx # load nlr_buf argument into edx (edx clobbered by call)
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mov NLR_TOP_TH_OFF(%eax), %ecx # get thread.nlr_top (last nlr_buf)
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mov %ecx, (%edx) # store it
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mov %edx, NLR_TOP_TH_OFF(%eax) # store new nlr_buf (to make linked list)
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#endif
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xor %eax, %eax # return 0, normal return
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ret # return
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#if !defined(NLR_OS_WINDOWS)
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.size nlr_push, .-nlr_push
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#endif
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/**************************************/
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// void nlr_pop()
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#if defined(NLR_OS_WINDOWS)
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.globl _nlr_pop
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.def _nlr_pop; .scl 2; .type 32; .endef
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_nlr_pop:
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#else
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.globl nlr_pop
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.type nlr_pop, @function
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nlr_pop:
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#endif
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#if !MICROPY_PY_THREAD
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mov NLR_TOP, %eax # load nlr_top
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mov (%eax), %eax # load prev nlr_buf
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mov %eax, NLR_TOP # store nlr_top (to unlink list)
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#else
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call mp_thread_get_state # get mp_state_thread ptr into eax
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mov NLR_TOP_TH_OFF(%eax), %ecx # get thread.nlr_top (last nlr_buf)
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mov (%ecx), %ecx # load prev nlr_buf
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mov %ecx, NLR_TOP_TH_OFF(%eax) # store prev nlr_buf (to unlink list)
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#endif
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ret # return
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#if !defined(NLR_OS_WINDOWS)
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.size nlr_pop, .-nlr_pop
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#endif
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/**************************************/
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// void nlr_jump(4(%esp)=mp_uint_t val)
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#if defined(NLR_OS_WINDOWS)
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.globl _nlr_jump
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.def _nlr_jump; .scl 2; .type 32; .endef
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_nlr_jump:
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#else
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.globl nlr_jump
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.type nlr_jump, @function
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nlr_jump:
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#endif
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#if !MICROPY_PY_THREAD
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mov NLR_TOP, %edx # load nlr_top
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test %edx, %edx # check for nlr_top being NULL
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#if defined(NLR_OS_WINDOWS)
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je _nlr_jump_fail # fail if nlr_top is NULL
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#else
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je nlr_jump_fail # fail if nlr_top is NULL
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#endif
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mov 4(%esp), %eax # load return value
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mov %eax, 4(%edx) # store return value
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mov (%edx), %eax # load prev nlr_top
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mov %eax, NLR_TOP # store nlr_top (to unlink list)
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#else
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call mp_thread_get_state # get mp_state_thread ptr into eax
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mov NLR_TOP_TH_OFF(%eax), %edx # get thread.nlr_top (last nlr_buf)
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test %edx, %edx # check for nlr_top being NULL
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#if defined(NLR_OS_WINDOWS)
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je _nlr_jump_fail # fail if nlr_top is NULL
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#else
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je nlr_jump_fail # fail if nlr_top is NULL
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#endif
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mov 4(%esp), %ecx # load return value
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mov %ecx, 4(%edx) # store return value
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mov (%edx), %ecx # load prev nlr_top
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mov %ecx, NLR_TOP_TH_OFF(%eax) # store nlr_top (to unlink list)
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#endif
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mov 28(%edx), %esi # load saved %si
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mov 24(%edx), %edi # load saved %di
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mov 20(%edx), %ebx # load saved %bx
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mov 16(%edx), %esp # load saved %sp
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mov 12(%edx), %ebp # load saved %bp
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mov 8(%edx), %eax # load saved %ip
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mov %eax, (%esp) # store saved %ip to stack
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xor %eax, %eax # clear return register
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inc %al # increase to make 1, non-local return
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ret # return
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#if !defined(NLR_OS_WINDOWS)
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.size nlr_jump, .-nlr_jump
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#endif
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#endif // defined(__i386__) && !MICROPY_NLR_SETJMP
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