393 lines
11 KiB
C
393 lines
11 KiB
C
/* *****************************************************************************
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* usage/backup.c -- backup software elements of the calculator.
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* Copyright (C) 2016-2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
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*
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* This file is part of libp7.
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* libp7 is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3.0 of the License,
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* or (at your option) any later version.
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*
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* libp7 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libp7; if not, see <http://www.gnu.org/licenses/>.
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* ************************************************************************** */
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#include <libp7/internals.h>
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#include <string.h>
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/* ************************************************************************** */
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/* Decode a CASIOWIN entry */
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/* ************************************************************************** */
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/* Raw structure */
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struct casiowin_entry {
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/* contains "CASIOWIN" */
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unsigned char magic[0x08];
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/* code that calls the subroutine at address 0x00010080 */
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unsigned char call_os[0x0A];
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/* alignment? */
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unsigned char _align[0x0A];
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/* marker for the OS updater PC program
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* (appeared in 1.01, no longer used in OS2)
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* - fx-9860G AU: "365E"
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* - fx-9860G SD Slim: 0x80005D7C */
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unsigned char marker[0x04];
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/* version (added in OS 1.02): "xx.xx.xxxx" */
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unsigned char version[0x0A];
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/* alignment? */
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unsigned char _align2[0x06];
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/* unused */
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unsigned char _unused[0x40];
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/* syscall code */
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unsigned char call_sys[0x0A];
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/* alignment? */
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unsigned char _align3[0x02];
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/* syscall table address */
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uint32_t syscall_table;
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};
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/**
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* decode_entry:
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* Decode an entry.
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*
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* @arg handle the handle.
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* @arg entry the decoded thing.
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* @arg raw the raw thing (uncasted).
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* @return the error code (0 if ok)
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*/
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static int decode_entry(p7_handle_t *handle, p7_casiowin_entry_t *entry,
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struct casiowin_entry *raw)
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{
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(void)handle;
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/* check the maaa-gic */
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if (!memcmp(raw->magic, "CASIOWIN", 8))
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return (p7_error_checksum);
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/* decode */
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g1m_decode_version((char*)raw->version, &entry->p7_casiowin_entry_version);
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entry->p7_casiowin_entry_syscall_table_offset = be32toh(raw->syscall_table);
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/* log */
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log_info("OS version is %.10s", raw->version);
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log_info("OS syscall table offset is 0x%08" PRIxP7INT,
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entry->p7_casiowin_entry_syscall_table_offset);
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/* no error */
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return (0);
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}
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/* ************************************************************************** */
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/* Get a CASIOWIN entry */
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/* ************************************************************************** */
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/**
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* p7_backup_casiowin_entry:
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* Backup the CASIOWIN entry.
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*
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* @arg handle the libp7 handle
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* @arg entry the entry to fill (0x80 bytes).
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* @return the error code (0 if ok)
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*/
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p7_define_ufunc(p7_backup_casiowin_entry, p7_attrs_backup_casiowin_entry,
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p7_handle_t *handle, p7_casiowin_entry_t *entry)
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{
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int err;
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/* make checks */
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chk_handle(handle);
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chk_seven(handle);
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chk_active(handle);
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/* send command packet */
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log_info("sending command");
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if ((err = p7_seven_send_cmdbak_reqcwe(handle))) {
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log_fatal("couldn't send command/get response");
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return (err);
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} else if (response.p7_seven_packet_type == p7_seven_type_error
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&& response.p7_seven_packet_code == p7_seven_err_other) {
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log_fatal("backup is unsupported.");
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return (p7_error_unsupported);
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} else if (response.p7_seven_packet_type != p7_seven_type_ack) {
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log_fatal("received an invalid answer");
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return (p7_error_unknown);
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}
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/* send the roleswap */
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log_info("sending the roleswap");
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if ((err = p7_seven_send_swp(handle))) {
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log_fatal("couldn't send roleswap");
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return (err);
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} else if (response.p7_seven_packet_type != p7_seven_type_cmd
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|| response.p7_seven_packet_code != 0x53) {
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log_fatal("didn't receive correct command");
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return (p7_error_unknown);
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}
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/* get the data */
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struct casiowin_entry raw;
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err = p7_seven_get_data(handle, &raw, sizeof(struct casiowin_entry),
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0, NULL);
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if (err) return (err);
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/* decode and return */
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return (decode_entry(handle, entry, &raw));
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}
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/* ************************************************************************** */
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/* Backup the bootcode */
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/* ************************************************************************** */
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/**
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* p7_backup_boot:
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* Backup the boot code.
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*
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* My current theory is that the bootcode size is in the bootcode, that
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* the OS reads it or not, and that even if the OS accepts bootcode backup
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* and reads it, the bootcode had blanked its size... so in order to make it
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* work correctly, I'll have to hardcode the size of the bootcode (64 KiB
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* on all of the known models until now).
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*
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* @arg handle the libp7 handle
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* @arg buffer the destination buffer.
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* @arg disp the display function
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* @return the error code (0 if ok)
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*/
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#define bootcode_size (0x10000)
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p7_define_ufunc(p7_backup_boot, p7_attrs_backup_boot,
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p7_handle_t *handle, const p7_buffer_t *buffer, p7_disp_t *disp)
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{
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int err;
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/* make checks */
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chk_handle(handle);
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chk_seven(handle);
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chk_active(handle);
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chk_bufwrite(buffer);
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/* send command packet */
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log_info("sending command");
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if ((err = p7_seven_send_cmdbak_reqboot(handle))) {
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log_fatal("couldn't send command/get response");
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return (err);
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} else if (response.p7_seven_packet_type == p7_seven_type_error
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&& response.p7_seven_packet_code == p7_seven_err_other) {
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log_fatal("backup is unsupported.");
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return (p7_error_unsupported);
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} else if (response.p7_seven_packet_type != p7_seven_type_ack) {
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log_fatal("received an invalid answer");
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return (p7_error_unknown);
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}
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/* send the roleswap */
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log_info("sending the roleswap");
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if ((err = p7_seven_send_swp(handle))) {
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log_fatal("couldn't send roleswap");
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return (err);
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} else if (response.p7_seven_packet_type != p7_seven_type_cmd) {
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log_fatal("didn't receive command");
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return (p7_error_unknown);
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}
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/* get the data */
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if ((err = p7_seven_get_buffer(handle, buffer, bootcode_size, 0, disp)))
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return (err);
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/* we're good */
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return (0);
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}
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#ifndef P7_DISABLED_FILE
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/**
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* p7_backup_bootfile:
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* Backup the boot to a FILE.
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*
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* @arg handle the handle.
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* @arg file the FILE.
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* @arg disp the display callback.
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* @return the error code (0 if ok).
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*/
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p7_define_ufunc(p7_backup_bootfile, p7_attrs_backup_bootfile,
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p7_handle_t *handle, FILE *file, p7_disp_t *disp)
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{
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chk_iswrite(file);
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p7_buffer_t buffer = {
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.p7_buffer_cookie = file,
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.p7_buffer_write = p7_filebuffer_write
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};
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return (p7_backup_boot(handle, &buffer, disp));
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}
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#endif
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/* ************************************************************************** */
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/* Backup the ROM */
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/* ************************************************************************** */
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/**
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* p7_backup_rom:
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* Backup the Flash ROM.
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*
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* @arg handle the libp7 handle.
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* @arg file the filestream.
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* @arg disp the display function.
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* @return the error code (0 if ok)
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*/
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#define rom_size (handle->_server.p7_server_flash_rom_capacity)
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p7_define_ufunc(p7_backup_rom, p7_attrs_backup_rom,
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p7_handle_t *handle, const p7_buffer_t *buffer, p7_disp_t *disp)
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{
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int err;
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/* make checks */
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chk_handle(handle);
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chk_seven(handle);
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chk_active(handle);
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chk_bufwrite(buffer);
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/* send command packet */
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log_info("sending command");
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if ((err = p7_seven_send_cmdbak_reqrom(handle))) {
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log_fatal("couldn't send command/get response");
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return (err);
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} else if (response.p7_seven_packet_type == p7_seven_type_error
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&& response.p7_seven_packet_code == p7_seven_err_other) {
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log_fatal("backup is unsupported.");
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return (p7_error_unsupported);
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} else if (response.p7_seven_packet_type != p7_seven_type_ack) {
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log_fatal("received an invalid answer");
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return (p7_error_unknown);
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}
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/* send the roleswap */
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log_info("sending the roleswap");
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if ((err = p7_seven_send_roleswp(handle))) {
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log_fatal("couldn't send roleswap");
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return (err);
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} else if (response.p7_seven_packet_type != p7_seven_type_cmd) {
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log_fatal("didn't receive command");
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return (p7_error_unknown);
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}
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/* get the data */
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if ((err = p7_seven_get_buffer(handle, buffer, rom_size, 0, disp)))
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return (err);
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/* we're good */
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return (0);
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}
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#ifndef P7_DISABLED_FILE
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/**
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* p7_backup_romfile:
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* Backup the ROM to a FILE.
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*
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* @arg handle the handle.
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* @arg file the FILE.
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* @arg disp the display callback.
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* @return the error code (0 if ok).
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*/
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p7_define_ufunc(p7_backup_romfile, p7_attrs_backup_romfile,
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p7_handle_t *handle, FILE *file, p7_disp_t *disp)
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{
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chk_iswrite(file);
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p7_buffer_t buffer = {
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.p7_buffer_cookie = file,
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.p7_buffer_write = p7_filebuffer_write
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};
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return (p7_backup_rom(handle, &buffer, disp));
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}
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#endif
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/* ************************************************************************** */
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/* Backup the RAM */
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/* ************************************************************************** */
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/**
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* p7_backup_ram:
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* Backup the RAM.
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*
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* @arg handle the libp7 handle.
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* @arg file the filestream.
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* @arg disp the display function.
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* @return the error code (0 if ok)
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*/
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#define ram_size (0x10000)
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p7_define_ufunc(p7_backup_ram, p7_attrs_backup_ram,
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p7_handle_t *handle, const p7_buffer_t *buffer, p7_disp_t *disp)
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{
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int err;
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/* make checks */
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chk_handle(handle);
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chk_seven(handle);
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chk_active(handle);
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chk_bufwrite(buffer);
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/* send command packet */
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log_info("sending command");
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if ((err = p7_seven_send_cmdbak_reqram(handle))) {
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log_fatal("couldn't send command/get response");
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return (err);
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} else if (response.p7_seven_packet_type == p7_seven_type_error
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&& response.p7_seven_packet_code == p7_seven_err_other) {
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log_fatal("backup is unsupported.");
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return (p7_error_unsupported);
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} else if (response.p7_seven_packet_type != p7_seven_type_ack) {
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log_fatal("received an invalid answer");
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return (p7_error_unknown);
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}
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/* send the roleswap */
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log_info("sending the roleswap");
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if ((err = p7_seven_send_roleswp(handle))) {
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log_fatal("couldn't send roleswap");
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return (err);
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} else if (response.p7_seven_packet_type != p7_seven_type_cmd) {
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log_fatal("didn't receive command");
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return (p7_error_unknown);
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}
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/* get the data */
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if ((err = p7_seven_get_buffer(handle, buffer, ram_size, 0, disp)))
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return (err);
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/* we're good */
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return (0);
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}
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#ifndef P7_DISABLED_FILE
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/**
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* p7_backup_ramfile:
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* Backup the RAM to a FILE.
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*
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* @arg handle the handle.
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* @arg file the FILE.
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* @arg disp the display callback.
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* @return the error code (0 if ok).
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*/
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p7_define_ufunc(p7_backup_ramfile, p7_attrs_backup_ramfile,
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p7_handle_t *handle, FILE *file, p7_disp_t *disp)
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{
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chk_iswrite(file);
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p7_buffer_t buffer = {
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.p7_buffer_cookie = file,
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.p7_buffer_write = p7_filebuffer_write
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};
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return (p7_backup_ram(handle, &buffer, disp));
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}
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#endif
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