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3a57f2f721
Most of the churn here occurs because 'filesize' is one of the redefined filesystem functions, but some of the structs used by the native FS code also include a 'filesize' member variable which gets renamed by the macro in some but not all source files. It's easier to rename 'filesize()' to 'ffilesize()' rather than try to clean up the macro mess or renaming the struct members. There is weirdness with root_realpath() which now breaks on native builds because it was assumed to be unprefixed there. dir_get_info() was unprefixed everywhere but this just seems inconsistent; make it follow the FS_PREFIX() convention too. Change-Id: Ic3700c6234ea45f32679c1a8429d70fdb8f4088a
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2010 by Thomas Martitz
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "system.h"
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#include "kernel.h"
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#include "file.h"
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#include "debug.h"
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#include "load_code.h"
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/* load binary blob from disk to memory, returning a handle */
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void * lc_open(const char *filename, unsigned char *buf, size_t buf_size)
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{
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int fd = open(filename, O_RDONLY);
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ssize_t read_size;
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struct lc_header hdr;
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unsigned char *buf_end = buf+buf_size;
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off_t copy_size;
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if (fd < 0)
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{
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DEBUGF("Could not open file");
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goto error;
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}
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#if NUM_CORES > 1
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/* Make sure COP cache is flushed and invalidated before loading */
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{
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int my_core = switch_core(CURRENT_CORE ^ 1);
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switch_core(my_core);
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}
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#endif
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/* read the header to obtain the load address */
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read_size = read(fd, &hdr, sizeof(hdr));
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if (read_size < 0)
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{
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DEBUGF("Could not read from file");
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goto error_fd;
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}
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/* hdr.end_addr points to the end of the bss section,
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* but there might be idata/icode behind that so the bytes to copy
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* can be larger */
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copy_size = MAX(ffilesize(fd), hdr.end_addr - hdr.load_addr);
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if (hdr.load_addr < buf || (hdr.load_addr+copy_size) > buf_end)
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{
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DEBUGF("Binary doesn't fit into memory");
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goto error_fd;
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}
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/* go back to beginning to load the whole thing (incl. header) */
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if (lseek(fd, 0, SEEK_SET) < 0)
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{
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DEBUGF("lseek failed");
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goto error_fd;
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}
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/* the header has the addresses where the code is linked at */
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read_size = read(fd, hdr.load_addr, copy_size);
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close(fd);
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if (read_size < 0)
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{
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DEBUGF("Could not read from file");
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goto error;
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}
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/* commit dcache and discard icache */
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commit_discard_idcache();
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/* return a pointer the header, reused by lc_get_header() */
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return hdr.load_addr;
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error_fd:
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close(fd);
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error:
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return NULL;
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}
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