mirror of
https://github.com/trezor/trezor-firmware.git
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93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TREZORHAL_APPLET_H
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#define TREZORHAL_APPLET_H
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#include <stddef.h>
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#include <stdint.h>
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#ifdef SYSCALL_DISPATCH
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#include "systask.h"
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// Applet entry point
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typedef void (*applet_startup_t)(const char* args, uint32_t random);
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typedef struct {
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uint32_t start;
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uint32_t size;
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} memory_area_t;
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// Applet header found at the beginning of the applet binary
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typedef struct {
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// Stack area
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memory_area_t stack;
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// Applet entry point
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applet_startup_t startup;
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} applet_header_t;
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// Applet memory layout
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typedef struct {
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// Read/write data area #1
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memory_area_t data1;
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// Read/write data area #2
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memory_area_t data2;
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// Read-only code area #1
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memory_area_t code1;
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// Read-only code area #2
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memory_area_t code2;
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} applet_layout_t;
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typedef struct {
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// Points to the applet header found at the beginning of the applet binary
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applet_header_t* header;
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// Applet memory layout describing the memory areas
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// the applet is allowed to use
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applet_layout_t layout;
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// Applet task
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systask_t task;
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// + privileges
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} applet_t;
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// Initializes the applet structure
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void applet_init(applet_t* applet, applet_header_t* header,
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applet_layout_t* layout);
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// Resets the applet and prepares it for execution from its entry point.
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//
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// Applet does not start immediately, it needs to be scheduled by
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// `systask_yield_to(&applet->task)` after calling this function.
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//
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// Returns `true` if the applet was successfully reset.
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bool applet_reset(applet_t* applet, uint32_t cmd, const void* arg,
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size_t arg_size);
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// Returns the currently active applet.
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//
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// Returns `NULL` if no applet is currently active.
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applet_t* applet_active(void);
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#endif // SYSCALL_DISPATCH
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#endif // TREZORHAL_APPLET_H
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