mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-21 05:48:23 +00:00
167 lines
6.3 KiB
C
167 lines
6.3 KiB
C
// clang-format off
|
|
|
|
/*
|
|
* This file is part of the Trezor project, https://trezor.io/
|
|
*
|
|
* Copyright (c) SatoshiLabs
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013-2016 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.
|
|
*/
|
|
|
|
#pragma GCC optimize("no-stack-protector") // applies to all functions in this file
|
|
|
|
#include "py/mpstate.h"
|
|
#include "py/nlr.h"
|
|
|
|
#if (!defined(MICROPY_NLR_SETJMP) || !MICROPY_NLR_SETJMP) && (defined(__thumb2__) || defined(__thumb__) || defined(__arm__))
|
|
|
|
#undef nlr_push
|
|
|
|
// We only need the functions here if we are on arm/thumb, and we are not
|
|
// using setjmp/longjmp.
|
|
//
|
|
// For reference, arm/thumb callee save regs are:
|
|
// r4-r11, r13=sp
|
|
|
|
__attribute__((naked)) unsigned int nlr_push(nlr_buf_t *nlr) {
|
|
|
|
__asm volatile (
|
|
"str r4, [r0, #12] \n" // store r4 into nlr_buf
|
|
"str r5, [r0, #16] \n" // store r5 into nlr_buf
|
|
"str r6, [r0, #20] \n" // store r6 into nlr_buf
|
|
"str r7, [r0, #24] \n" // store r7 into nlr_buf
|
|
|
|
#if defined(__ARM_ARCH_6M__)
|
|
"mov r1, r8 \n"
|
|
"str r1, [r0, #28] \n" // store r8 into nlr_buf
|
|
"mov r1, r9 \n"
|
|
"str r1, [r0, #32] \n" // store r9 into nlr_buf
|
|
"mov r1, r10 \n"
|
|
"str r1, [r0, #36] \n" // store r10 into nlr_buf
|
|
"mov r1, r11 \n"
|
|
"str r1, [r0, #40] \n" // store r11 into nlr_buf
|
|
"mov r1, r13 \n"
|
|
"str r1, [r0, #44] \n" // store r13=sp into nlr_buf
|
|
"mov r1, lr \n"
|
|
"str r1, [r0, #8] \n" // store lr into nlr_buf
|
|
#else
|
|
"str r8, [r0, #28] \n" // store r8 into nlr_buf
|
|
"str r9, [r0, #32] \n" // store r9 into nlr_buf
|
|
"str r10, [r0, #36] \n" // store r10 into nlr_buf
|
|
"str r11, [r0, #40] \n" // store r11 into nlr_buf
|
|
"str r13, [r0, #44] \n" // store r13=sp into nlr_buf
|
|
"str lr, [r0, #8] \n" // store lr into nlr_buf
|
|
#endif
|
|
|
|
#if defined(__ARM_ARCH_6M__)
|
|
"ldr r1, nlr_push_tail_var \n"
|
|
"bx r1 \n" // do the rest in C
|
|
".align 2 \n"
|
|
"nlr_push_tail_var: .word nlr_push_tail \n"
|
|
#else
|
|
"b nlr_push_tail \n" // do the rest in C
|
|
#endif
|
|
);
|
|
|
|
return 0; // needed to silence compiler warning
|
|
}
|
|
|
|
__attribute__((used)) unsigned int nlr_push_tail(nlr_buf_t *nlr) {
|
|
nlr_buf_t **top = &MP_STATE_THREAD(nlr_top);
|
|
nlr->prev = *top;
|
|
*top = nlr;
|
|
return 0; // normal return
|
|
}
|
|
|
|
void nlr_pop(void) {
|
|
nlr_buf_t **top = &MP_STATE_THREAD(nlr_top);
|
|
*top = (*top)->prev;
|
|
}
|
|
|
|
NORETURN __attribute__((naked)) void nlr_jump(void *val) {
|
|
nlr_buf_t **top_ptr = &MP_STATE_THREAD(nlr_top);
|
|
nlr_buf_t *top = *top_ptr;
|
|
if (top == NULL) {
|
|
nlr_jump_fail(val);
|
|
}
|
|
|
|
top->ret_val = val;
|
|
*top_ptr = top->prev;
|
|
|
|
__asm volatile (
|
|
"mov r0, %0 \n" // r0 points to nlr_buf
|
|
"ldr r4, [r0, #12] \n" // load r4 from nlr_buf
|
|
"ldr r5, [r0, #16] \n" // load r5 from nlr_buf
|
|
"ldr r6, [r0, #20] \n" // load r6 from nlr_buf
|
|
"ldr r7, [r0, #24] \n" // load r7 from nlr_buf
|
|
|
|
#if defined(__ARM_ARCH_6M__)
|
|
"ldr r1, [r0, #28] \n" // load r8 from nlr_buf
|
|
"mov r8, r1 \n"
|
|
"ldr r1, [r0, #32] \n" // load r9 from nlr_buf
|
|
"mov r9, r1 \n"
|
|
"ldr r1, [r0, #36] \n" // load r10 from nlr_buf
|
|
"mov r10, r1 \n"
|
|
"ldr r1, [r0, #40] \n" // load r11 from nlr_buf
|
|
"mov r11, r1 \n"
|
|
"ldr r1, [r0, #44] \n" // load r13=sp from nlr_buf
|
|
"mov r13, r1 \n"
|
|
"ldr r1, [r0, #8] \n" // load lr from nlr_buf
|
|
"mov lr, r1 \n"
|
|
#else
|
|
"ldr r8, [r0, #28] \n" // load r8 from nlr_buf
|
|
"ldr r9, [r0, #32] \n" // load r9 from nlr_buf
|
|
"ldr r10, [r0, #36] \n" // load r10 from nlr_buf
|
|
"ldr r11, [r0, #40] \n" // load r11 from nlr_buf
|
|
"ldr r13, [r0, #44] \n" // load r13=sp from nlr_buf
|
|
"ldr lr, [r0, #8] \n" // load lr from nlr_buf
|
|
#endif
|
|
"movs r0, #1 \n" // return 1, non-local return
|
|
"bx lr \n" // return
|
|
: // output operands
|
|
: "r"(top) // input operands
|
|
: // clobbered registers
|
|
);
|
|
|
|
for (;;); // needed to silence compiler warning
|
|
}
|
|
|
|
#endif // (!defined(MICROPY_NLR_SETJMP) || !MICROPY_NLR_SETJMP) && (defined(__thumb2__) || defined(__thumb__) || defined(__arm__))
|