74cd991e7e
That way, data source address does not depend on any other unrelated change in linker script. This also fixes cases when .data input section is aligned on 8 bytes. The new version does not provide any address for the output section so that it is aligned to the strictest input section. The _data_loadaddr symbol will always take this alignment into account.
96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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 library 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 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 this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define WEAK __attribute__ ((weak))
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/* Symbols exported by the linker script(s): */
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extern unsigned _data_loadaddr, _data, _edata, _ebss, _stack;
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void main(void);
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void reset_handler(void);
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void blocking_handler(void);
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void null_handler(void);
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void WEAK nmi_handler(void);
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void WEAK hard_fault_handler(void);
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void WEAK mem_manage_handler(void);
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void WEAK bus_fault_handler(void);
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void WEAK usage_fault_handler(void);
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void WEAK sv_call_handler(void);
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void WEAK debug_monitor_handler(void);
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void WEAK pend_sv_handler(void);
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void WEAK sys_tick_handler(void);
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/* TODO: Interrupt handler prototypes */
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__attribute__ ((section(".vectors")))
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void (*const vector_table[]) (void) = {
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(void*)&_stack, /* Addr: 0x0000_0000 */
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reset_handler, /* Addr: 0x0000_0004 */
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nmi_handler, /* Addr: 0x0000_0008 */
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hard_fault_handler, /* Addr: 0x0000_000C */
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mem_manage_handler, /* Addr: 0x0000_0010 */
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bus_fault_handler, /* Addr: 0x0000_0014 */
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usage_fault_handler, /* Addr: 0x0000_0018 */
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0, 0, 0, 0, /* Reserved Addr: 0x0000_001C - 0x0000_002B */
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sv_call_handler, /* Addr: 0x0000_002C */
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debug_monitor_handler, /* Addr: 0x0000_0030 */
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0, /* Reserved Addr: 0x0000_00034 */
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pend_sv_handler, /* Addr: 0x0000_0038 */
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sys_tick_handler, /* Addr: 0x0000_003C */
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};
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void reset_handler(void)
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{
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volatile unsigned *src, *dest;
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__asm__("MSR msp, %0" : : "r"(&_stack));
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for (src = &_data_loadaddr, dest = &_data; dest < &_edata; src++, dest++)
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*dest = *src;
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while (dest < &_ebss)
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*dest++ = 0;
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/* Call the application's entry point. */
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main();
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}
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void blocking_handler(void)
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{
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while (1) ;
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}
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void null_handler(void)
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{
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/* Do nothing. */
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}
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#pragma weak nmi_handler = null_handler
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#pragma weak hard_fault_handler = blocking_handler
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#pragma weak mem_manage_handler = blocking_handler
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#pragma weak bus_fault_handler = blocking_handler
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#pragma weak usage_fault_handler = blocking_handler
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#pragma weak sv_call_handler = null_handler
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#pragma weak debug_monitor_handler = null_handler
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#pragma weak pend_sv_handler = null_handler
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#pragma weak sys_tick_handler = null_handler
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/* TODO: Interrupt handler weak aliases */
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