328 lines
6.1 KiB
ArmAsm
328 lines
6.1 KiB
ArmAsm
/* Copyright (c) 2011 Red Hat Incorporated.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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The name of Red Hat Incorporated may not be used to endorse
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or promote products derived from this software without specific
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prior written permission.
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This software is provided by the copyright holders and contributors
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"AS IS" and any express or implied warranties, including, but not
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limited to, the implied warranties of merchantability and fitness for
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a particular purpose are disclaimed. In no event shall Red Hat
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incorporated be liable for any direct, indirect, incidental, special,
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exemplary, or consequential damages (including, but not limited to,
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procurement of substitute goods or services; loss of use, data, or
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profits; or business interruption) however caused and on any theory of
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liability, whether in contract, strict liability, or tort (including
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negligence or otherwise) arising in any way out of the use of this
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software, even if advised of the possibility of such damage. */
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#include "rl78-sys.h"
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.section ".vec","a"
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.short _start
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.section ".ivec","a"
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#define IV(x) .weak _##x##_handler | .short _##x##_handler
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#define IVx() .short 0
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/* To use a vector, simply define a global function named foo_handler()
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for any IV(foo) listed below (i.e. tm05_handler) */
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.global _interrupt_vector_table
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_interrupt_vector_table:
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IV(wdti)
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IV(lvi)
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IV(p0)
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IV(p1)
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IV(p2)
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IV(p3)
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IV(p4)
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IV(p5)
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IV(st2)
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IV(sr2)
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IV(sre2)
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IV(dma0)
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IV(dma1)
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IV(st0)
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IV(sr0)
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IV(tm01h)
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IV(st1)
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IV(sr1)
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IV(sre1)
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IV(iica0)
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IV(tm00)
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IV(tm01)
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IV(tm02)
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IV(tm03)
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IV(ad)
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IV(rtc)
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IV(it)
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IV(kr)
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IV(st3)
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IV(sr3)
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IV(tm13)
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IV(tm04)
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IV(tm05)
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IV(tm06)
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IV(tm07)
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IV(p6)
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IV(p7)
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IV(p8)
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IV(p9)
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IV(p10)
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IV(p11)
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IV(tm10)
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IV(tm12)
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IV(sre3)
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IV(tm13h)
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IV(md)
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IV(iica1)
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IV(fl)
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IV(dma2)
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IV(dma3)
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IV(tm14)
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IV(tm15)
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IV(tm16)
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IV(tm17)
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IVx()
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IVx()
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IVx()
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IVx()
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IVx()
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IVx()
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IVx()
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IV(brk)
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/* Note: 126 vectors */
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.section ".csstart", "ax"
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.global __csstart
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__csstart:
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br !!_start
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.weak __rl78_option_byte_0
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.weak __rl78_option_byte_1
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.weak __rl78_option_byte_2
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.weak __rl78_option_byte_3
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__rl78_option_byte_0 = 0x6e
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__rl78_option_byte_1 = 0xff
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__rl78_option_byte_2 = 0xe8
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__rl78_option_byte_3 = 0x85
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.section ".opt", "a"
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.byte __rl78_option_byte_0
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.byte __rl78_option_byte_1
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.byte __rl78_option_byte_2
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.byte __rl78_option_byte_3
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.text
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.global _start
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.type _start, @function
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_start:
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movw sp, #__stack
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;; block move to initialize .data
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;; we're copying from 00:[_romdatastart] to 0F:[_datastart]
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;; and our data is not in the mirrored area.
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mov es, #0
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sel rb0 ; bank 0
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movw hl, #__datastart
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movw de, #__romdatastart
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sel rb1 ; bank 1
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movw ax, #__romdatacopysize
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shrw ax,1
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1:
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cmpw ax, #0
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bz $1f
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decw ax
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sel rb0 ; bank 0
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movw ax, es:[de]
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movw [hl], ax
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incw de
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incw de
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incw hl
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incw hl
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sel rb1
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br $1b
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1:
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sel rb0 ; bank 0
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;; block fill to .bss
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sel rb0 ; bank 0
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movw hl, #__bssstart
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movw ax, #0
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sel rb1 ; bank 1
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movw ax, #__bsssize
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shrw ax,1
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1:
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cmpw ax, #0
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bz $1f
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decw ax
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sel rb0 ; bank 0
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movw [hl], ax
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incw hl
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incw hl
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sel rb1
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br $1b
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1:
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sel rb0 ; bank 0
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call !!__rl78_init
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#ifdef PROFILE_SUPPORT /* Defined in gcrt0.S. */
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movw ax, # _start
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push ax
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movw ax, # _etext
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push ax
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call !!__monstartup
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#endif
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movw ax, #0
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push ax /* envp */
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push ax /* argv */
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push ax /* argc */
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call !!_main
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.LFE2:
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movw ax, r8 ; Save return code.
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push ax
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#ifdef PROFILE_SUPPORT
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call !!__mcleanup
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#endif
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call !!_exit
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.size _start, . - _start
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.global _rl78_run_preinit_array
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.type _rl78_run_preinit_array,@function
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_rl78_run_preinit_array:
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movw hl, #__preinit_array_start
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movw de, #__preinit_array_end
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movw bc, #-2
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br $_rl78_run_inilist
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.global _rl78_run_init_array
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.type _rl78_run_init_array,@function
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_rl78_run_init_array:
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movw hl, #__init_array_start
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movw de, #__init_array_end
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movw bc, #2
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br $_rl78_run_inilist
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.global _rl78_run_fini_array
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.type _rl78_run_fini_array,@function
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_rl78_run_fini_array:
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movw hl, #__fini_array_start
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movw de, #__fini_array_end
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movw bc, #-2
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/* fall through */
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;; HL = start of list
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;; DE = end of list
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;; BC = step direction (+2 or -2)
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_rl78_run_inilist:
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next_inilist:
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movw ax, hl
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cmpw ax, de
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bz $done_inilist
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movw ax, [hl]
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cmpw ax, #-1
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bz $skip_inilist
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cmpw ax, #0
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bz $skip_inilist
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push ax
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push bc
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push de
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push hl
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call ax
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pop hl
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pop de
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pop bc
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pop ax
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skip_inilist:
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movw ax, hl
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addw ax, bc
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movw hl, ax
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br $next_inilist
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done_inilist:
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ret
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.section .init,"ax"
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.global __rl78_init
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__rl78_init:
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.section .fini,"ax"
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.global __rl78_fini
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__rl78_fini:
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call !!_rl78_run_fini_array
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.section .data
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.global ___dso_handle
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.weak ___dso_handle
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___dso_handle:
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.long 0
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;;; Provide Dwarf unwinding information that will help GDB stop
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;;; backtraces at the right place. This is stolen from assembly
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;;; code generated by GCC with -dA.
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.section .debug_frame,"",@progbits
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.Lframe0:
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.4byte .LECIE0-.LSCIE0 ; Length of Common Information Entry
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.LSCIE0:
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.4byte 0xffffffff ; CIE Identifier Tag
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.byte 0x1 ; CIE Version
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.ascii "\0" ; CIE Augmentation
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.uleb128 0x1 ; CIE Code Alignment Factor
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.sleb128 -1 ; CIE Data Alignment Factor
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.byte 0xd ; CIE RA Column
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.byte 0xc ; DW_CFA_def_cfa
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.uleb128 0xc
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.uleb128 0x3
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.byte 0x8d ; DW_CFA_offset, column 0xd
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.uleb128 0x3
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.p2align 2
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.LECIE0:
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.LSFDE0:
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.4byte .LEFDE0-.LASFDE0 ; FDE Length
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.LASFDE0:
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.4byte .Lframe0 ; FDE CIE offset
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.4byte _start ; FDE initial location
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.4byte .LFE2 - _start ; FDE address range
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.byte 0xf ; DW_CFA_def_cfa_expression
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.uleb128 1 ; length of expression
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.byte 0x30 ; DW_OP_lit0
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.p2align 2
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.LEFDE0:
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.text
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