nlrthumb.S

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013-2015 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.
 */

#if (!defined(MICROPY_NLR_SETJMP) || !MICROPY_NLR_SETJMP) && (defined(__thumb2__) || defined(__thumb__) || defined(__arm__))

// 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

// the offset of nlr_top within mp_state_ctx_t
#define NLR_TOP_OFFSET (2 * 4)

    .syntax unified
    /*.cpu cortex-m4*/
    /*.thumb*/
    .text
    .align  2

/**************************************/
// mp_uint_t nlr_push(r0=nlr_buf_t *nlr)

    .global nlr_push
#if defined(__thumb2__)
    .thumb
    .thumb_func
#endif
    .type   nlr_push, %function
nlr_push:
    str     r4, [r0, #12]           @ store r4 into nlr_buf
    str     r5, [r0, #16]           @ store r5 into nlr_buf
    str     r6, [r0, #20]           @ store r6 into nlr_buf
    str     r7, [r0, #24]           @ store r7 into nlr_buf

#if defined(__ARM_ARCH_6M__)
    mov     r1, r8
    str     r1, [r0, #28]           @ store r8 into nlr_buf
    mov     r1, r9
    str     r1, [r0, #32]           @ store r9 into nlr_buf
    mov     r1, r10
    str     r1, [r0, #36]           @ store r10 into nlr_buf
    mov     r1, r11
    str     r1, [r0, #40]           @ store r11 into nlr_buf
    mov     r1, r13
    str     r1, [r0, #44]           @ store r13=sp into nlr_buf
    mov     r1, lr