187 lines
4.2 KiB
ArmAsm
187 lines
4.2 KiB
ArmAsm
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/*
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Copyright (c) 2005,2008 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 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 "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING 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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*/
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#if defined(__r8c_cpu__) || defined(__m16c_cpu__)
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#define A16
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#define A(n,w) n
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#define W w
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#define ALIGN 1
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#else
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#define A24
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#define A(n,w) w
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#define W l
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#define ALIGN 2
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#endif
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.section ".resetvec","ax",@progbits
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.long _start
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.text
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.global _start
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_start:
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.LFB2:
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fclr U /* One stack for user and interrupts */
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ldc #__stack,sp
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#ifdef A16
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mov.b #%hi8(__romdatastart),r1h
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mov.w #%lo16(__romdatastart),a0
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mov.w #__datastart,a1
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#else
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mov.l #__romdatastart,a0
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mov.l #__datastart,a1
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#endif
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mov.w #__romdatacopysize,r3
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shl.w #-1,r3
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smovf.w
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#ifdef A16
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mov.w #__bssstart,a1
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#else
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mov.l #__bssstart,a1
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#endif
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mov.w #__bsssize,r3
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shl.w #-1,r3
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mov.w #0,r0
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sstr.w
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#ifdef A16
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ldc #%lo16(__var_vects),intbl
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ldc #%hi16(__var_vects),intbh
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#else
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ldc #__var_vects,intb
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#endif
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fset I
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jsr.a __m32c_init
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jsr.a _main
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.LFE2:
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#ifdef A24
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/* rv in r0, ok for arg0 */
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#else
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mov.w r0,r1
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#endif
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jsr.a _exit
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.text
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.global _m32c_run_preinit_array
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.type _m32c_run_preinit_array,@function
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_m32c_run_preinit_array:
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mov.W #__preinit_array_start,a0
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mov.W #__preinit_array_end,a1
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jmp.w _m32c_run_inilist
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.global _m32c_run_init_array
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.type _m32c_run_init_array,@function
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_m32c_run_init_array:
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mov.W #__init_array_start,a0
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mov.W #__init_array_end,a1
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jmp.w _m32c_run_inilist
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.global _m32c_run_fini_array
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.type _m32c_run_fini_array,@function
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_m32c_run_fini_array:
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mov.W #__fini_array_start,a0
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mov.W #__fini_array_end,a1
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/* fall through */
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_m32c_run_inilist:
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next_inilist:
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cmp.W a0,a1
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jeq done_inilist
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pushm a0,a1
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mov.W [a0],a0
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#ifdef A16
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mov.b:s #0,a1 /* zero extends */
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jsri.a a1a0
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#else
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jsri.a a0
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#endif
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popm a0,a1
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add.W A(#2,#4),a0
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jmp.b next_inilist
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done_inilist:
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rts
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.section .init,"ax",@progbits
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.global __m32c_init
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__m32c_init:
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enter #0
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.section .fini,"ax",@progbits
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.global __m32c_fini
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__m32c_fini:
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enter #0
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jsr.a _m32c_run_fini_array
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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 ALIGN
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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 .LFB2 ; FDE initial location
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.4byte .LFE2-.LFB2 ; 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 ALIGN
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.LEFDE0:
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.text
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