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Diffstat (limited to 'libgloss/epiphany/crt0.S')
| -rw-r--r-- | libgloss/epiphany/crt0.S | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/libgloss/epiphany/crt0.S b/libgloss/epiphany/crt0.S deleted file mode 100644 index d684e1e10..000000000 --- a/libgloss/epiphany/crt0.S +++ /dev/null @@ -1,166 +0,0 @@ -# C Startup for EPIPHANY - -# Copyright (c) 2011, Adapteva, Inc. -# All rights reserved. - -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are met: -# * Redistributions of source code must retain the above copyright notice, -# this list of conditions and the following disclaimer. -# * Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# * Neither the name of Adapteva nor the names of its contributors may be -# used to endorse or promote products derived from this software without -# specific prior written permission. - -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE -# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -# POSSIBILITY OF SUCH DAMAGE. - - -.section IVT,"a",@progbits ; - .global _start; - .type _start, %function; -_start: - .balign 4 ; - b .normal_start - - .balign 4 ; 0x4 - b .sw_exception_v - - .balign 4 ; 0x8 - b .page_miss_v; - - .balign 4 ; 0xc - b .timer0_expired_v - - .balign 4 ; 0x10 - b .timer1_expired_v - - .balign 4 ; 0x14 - b .message_v - - .balign 4 ; 0x18 - b .dma0_v - - .balign 4 ; 0x1c - b .dma1_v - - .balign 4 ; 0x20 - b .wand_v - - .balign 4 ; 0x24 - b .soft_v - -.size _start, .-_start - -.section RESERVED_CRT0,"a",@progbits ; - -.global .normal_start; -.balign 4 -.type .normal_start, %function -.normal_start: - mov r3,%low(_external_start) - movt r3,%high(_external_start) - jalr r3 -.size .normal_start, .-.normal_start - - - - -.section .text; - .org 0x0000 ; Relative to start of text section - .global _external_start - .type _external_start, %function -_external_start: - - .align 4 - - ;; Initialise the stack pointer and frame pointer. Hopefully __stack - ;; is somewhere meaningful. - mov sp,%low(___stack) - movt sp,%high(___stack) - mov fp,sp - - ;; Zero the data space - mov r0,%low(___bss_start) - movt r0,%high(___bss_start) - mov r1,%low(_end) - movt r1,%high(_end) - mov r2,#0 - mov r3,#0 -.L0_init_: - strd r2,[r0],+#1 - sub r5,r1,r0 - bne .L0_init_ - - ;; Setup destructors to be called from exit if main never returns -#if 0 - mov r0,%low(fini) - movt r0,%high(fini) - mov r2,%low(_atexit) - movt r2,%high(_atexit) - jalr r2 -#else - ; calling atexit drags in malloc, so instead poke the function - ; address directly into the reent structure - mov r2,%low(__impure_ptr) - movt r2,%high(__impure_ptr) - ldr r2,[r2] - mov r1,%low(fini) - movt r1,%high(fini) -#ifdef __STRUCT_ALIGN_64__ -#error - add r2,r2,need_to_find_out; &_GLOBAL_REENT->atexit0 - str r2, [r2,-1];??or -2?; _GLOBAL_REENT->atexit - mov r0, 1 - str r0, [r2,1] ; _GLOBAL_REENT->atexit0._ind - str r1, [r2,2] ; _GLOBAL_REENT->atexit0._fns[0] -#else /* !__STRUCT_ALIGN_64__ */ - add r0,r2,0x14c ; &_GLOBAL_REENT->atexit0 - str r0, [r0,-1] ; _GLOBAL_REENT->atexit - mov r0, 1 - strd r0, [r2,0x2a] ; _GLOBAL_REENT->atexit0._ind -#endif /* !__STRUCT_ALIGN_64__ */ -#endif /* !0 */ - ;; Call global and static constructors - mov r2,%low(init) - movt r2,%high(init) - jalr r2 - - - ;;return from reset ISR - mov R0,%low(RDS) - movt R0,%high(RDS) - movts iret,r0 - rti -RDS: - - ;; Initialise argc, argv and envp to empty and call main - mov r0,#0 - mov r1,#0 - mov r2,#0 - mov r3,%low(_main) - movt r3,%high(_main) - jalr r3 - ;;bl _main - - ;; Call exit - mov r3,%low(_exit) - movt r3,%high(_exit) - jalr r3 - ;;bl _exit - - ;; Should never reach here - idle - -.size _external_start, .-_external_start |