75 lines
3.0 KiB
C
75 lines
3.0 KiB
C
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/*
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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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#include "mpconfig.h"
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#include "misc.h"
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#include "nlr.h"
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#include "qstr.h"
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#include "obj.h"
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#include <windows.h>
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IMAGE_NT_HEADERS *header_from_memory(const char *module) {
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BYTE *base_addr = (BYTE*)GetModuleHandleA(module);
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IMAGE_DOS_HEADER *dos_header = (IMAGE_DOS_HEADER*)base_addr;
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return (IMAGE_NT_HEADERS*)(base_addr + dos_header->e_lfanew);
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}
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IMAGE_SECTION_HEADER *find_section(IMAGE_NT_HEADERS *nt_header, const char *name) {
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int i;
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IMAGE_SECTION_HEADER *section = IMAGE_FIRST_SECTION(nt_header);
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for (i = 0; i < nt_header->FileHeader.NumberOfSections; ++i) {
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if (strcmp((const char *)section->Name, name) == 0) {
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return section;
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}
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++section;
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}
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return NULL;
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}
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void section_boundaries(IMAGE_NT_HEADERS *nt_header, IMAGE_SECTION_HEADER *section, char **start, char **end) {
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if (section == NULL) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "Could not lookup section boundaries"));
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}
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*start = (char*)(nt_header->OptionalHeader.ImageBase + section->VirtualAddress);
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*end = *start + section->Misc.VirtualSize;
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}
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void section_boundaries_from_module(const char *module, const char *section, char **start, char **end) {
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IMAGE_NT_HEADERS *nt_header = header_from_memory(module);
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IMAGE_SECTION_HEADER *dsection = find_section(nt_header, section);
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section_boundaries(nt_header, dsection, start, end);
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}
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char *bss_start = 0;
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char *bss_end = 0;
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//MSVC has no __bss_start and _end but we can get accurate section info from the PE header.
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//The standard .bss section is appended to the standard .data section however so it cannot
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//be looked up by name. To deal with that we put all uPy static variables in a named section.
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void getbss() {
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section_boundaries_from_module(NULL, MICROPY_PORT_BSSSECTION, &bss_start, &bss_end);
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}
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