8abcf666cb
The pointers to the bss section are acquired in init.c() by inspecting the PE header. Works for msvc and mingw.
75 lines
3.0 KiB
C
75 lines
3.0 KiB
C
/*
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013, 2014 Damien P. George
|
|
*
|
|
* 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 "mpconfig.h"
|
|
#include "misc.h"
|
|
#include "nlr.h"
|
|
#include "qstr.h"
|
|
#include "obj.h"
|
|
#include <windows.h>
|
|
|
|
IMAGE_NT_HEADERS *header_from_memory(const char *module) {
|
|
BYTE *base_addr = (BYTE*)GetModuleHandleA(module);
|
|
IMAGE_DOS_HEADER *dos_header = (IMAGE_DOS_HEADER*)base_addr;
|
|
return (IMAGE_NT_HEADERS*)(base_addr + dos_header->e_lfanew);
|
|
}
|
|
|
|
IMAGE_SECTION_HEADER *find_section(IMAGE_NT_HEADERS *nt_header, const char *name) {
|
|
int i;
|
|
IMAGE_SECTION_HEADER *section = IMAGE_FIRST_SECTION(nt_header);
|
|
for (i = 0; i < nt_header->FileHeader.NumberOfSections; ++i) {
|
|
if (strcmp((const char *)section->Name, name) == 0) {
|
|
return section;
|
|
}
|
|
++section;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void section_boundaries(IMAGE_NT_HEADERS *nt_header, IMAGE_SECTION_HEADER *section, char **start, char **end) {
|
|
if (section == NULL) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "Could not lookup section boundaries"));
|
|
}
|
|
*start = (char*)(nt_header->OptionalHeader.ImageBase + section->VirtualAddress);
|
|
*end = *start + section->Misc.VirtualSize;
|
|
}
|
|
|
|
void section_boundaries_from_module(const char *module, const char *section, char **start, char **end) {
|
|
IMAGE_NT_HEADERS *nt_header = header_from_memory(module);
|
|
IMAGE_SECTION_HEADER *dsection = find_section(nt_header, section);
|
|
section_boundaries(nt_header, dsection, start, end);
|
|
}
|
|
|
|
char *bss_start = 0;
|
|
char *bss_end = 0;
|
|
|
|
//MSVC has no __bss_start and _end but we can get accurate section info from the PE header.
|
|
//The standard .bss section is appended to the standard .data section however so it cannot
|
|
//be looked up by name. To deal with that we put all uPy static variables in a named section.
|
|
void getbss() {
|
|
section_boundaries_from_module(NULL, MICROPY_PORT_BSSSECTION, &bss_start, &bss_end);
|
|
}
|