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Diffstat (limited to 'libgloss/aarch64/crt0.S')
| -rw-r--r-- | libgloss/aarch64/crt0.S | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/libgloss/aarch64/crt0.S b/libgloss/aarch64/crt0.S deleted file mode 100644 index ae6264d8a..000000000 --- a/libgloss/aarch64/crt0.S +++ /dev/null @@ -1,260 +0,0 @@ -/* Copyright (c) 2009, 2010, 2011, 2012 ARM Ltd. All rights reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - 1. Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - 2. 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. - 3. The name of the company may not be used to endorse or promote - products derived from this software without specific prior written - permission. - - THIS SOFTWARE IS PROVIDED BY ARM LTD ``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 ARM LTD 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. */ - -#include "newlib.h" -#include "svc.h" - -/* ANSI concatenation macros. */ -#define CONCAT(a, b) CONCAT2(a, b) -#define CONCAT2(a, b) a ## b - -#ifdef __USER_LABEL_PREFIX__ -#define FUNCTION( name ) CONCAT (__USER_LABEL_PREFIX__, name) -#else -#error __USER_LABEL_PREFIX is not defined -#endif - -#ifdef HAVE_INITFINI_ARRAY -#define _init __libc_init_array -#define _fini __libc_fini_array -#endif - -/* In ELF64, the large addressing model is used and R_AARCH64_ABS64 - reloc is generated to relocate a 64-bit address. Since 64-bit - relocation is not available in ELF32, in order to have - a single code path for both ELF64 and ELF32 classes, we synthesize - a 64-bit relocation by using R_AARCH64_P32_ABS32 on one of the two - .word directives, depending on the endianness. */ - -.macro GEN_DWORD name -#if defined(__ILP32__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ - .word \name - .word 0 -#elif defined(__ILP32__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ - .word 0 - .word \name -#else - .dword \name -#endif -.endm - -/* Help tackle the pointer size difference between ELF64 and ELF32. */ -#ifdef __ILP32__ -#define PTR_REG(n) w##n -#define PTR_SIZE 4 -#define PTR_LOG_SIZE 2 -#else -#define PTR_REG(n) x##n -#define PTR_SIZE 8 -#define PTR_LOG_SIZE 3 -#endif - - .text -.macro FUNC_START name - .global \name -\name: -.endm - - .align 2 - - FUNC_START _mainCRTStartup - FUNC_START _start - -/* Start by setting up a stack */ - - /* Issue Angel SVC to read memory info. - - ptr to ptr to 4 words to receive data. */ - adr x1, .LC0 - mov w0, #AngelSVC_Reason_HeapInfo - AngelSVCAsm AngelSVC - - /* Initialise the stack pointer */ - - /* We currently choose to use the heap_limit field rather than - stack_base because the AEM validation model - returns sane values in the heap fields, but 0 in the stack - fields. Note on the VE AEM model it is necessary to pass - command line options to the AEM in order to define the values - exposed here in the HeapInfo Angel call. */ - ldr x0, .LC0 /* point at returned values */ - ldr x1, [x0, #8] /* get heap_limit */ -#ifdef __ILP32__ - /* Sanity check on the heap base. */ - ldr x0, [x0] /* get heap_base */ - tst x0, #0xffffffff00000000 - beq 1f - /* Exit with 1 if the heap base is not within the 32-bit address - space. */ - mov x0, ADP_Stopped_ApplicationExit & 0xff - movk x0, ADP_Stopped_ApplicationExit >> 16, lsl #16 - adrp x1, HeapBase /* Reuse to construct the parameter block. */ - add x1, x1, #:lo12:HeapBase - str x0, [x1] - mov x0, 1 - str x0, [x1, #8] - mov w0, #AngelSVC_Reason_ReportException - AngelSVCAsm AngelSVC -1: - /* For the sake of safety, set the stack base to the top end of - the 32-bit address space if the returned value from the - Angel API call is larger than or equal to 4 GiB. */ - tst x1, #0xffffffff00000000 - csinv w1, w1, wzr, eq -#endif - - /* Ensure quad-word stack alignment. */ - and x0, x1, #~15 - mov sp, x0 - - /* Setup an initial dummy frame with saved fp=0 and saved lr=0 */ - mov x29, 0 - stp x29, x29, [sp, #-16]! - mov x29, sp - - /* Initialize exception vector table, flatmap, etc. */ - bl FUNCTION (_cpu_init_hook) - - /* Zero the memory in the .bss section. */ - ldr x0, .LC1 /* First arg: start of memory block */ - mov w1, #0 /* Second arg: fill value */ - ldr x2, .LC2 - sub x2, x2, x0 /* Third arg: length of block */ - bl FUNCTION (memset) - - /* Need to set up standard file handles */ - bl FUNCTION (initialise_monitor_handles) - - /* .init and .fini sections are used to create constructors - and destructors. Here we call the _init function and arrange - for _fini to be called at program exit. */ - ldr x0, .Lfini - bl FUNCTION (atexit) - - bl FUNCTION (_init) - - /* Fetch and parse the command line. */ - adr x1, .Lcmdline /* Command line descriptor. */ - mov w0, #AngelSVC_Reason_GetCmdLine - AngelSVCAsm AngelSVC - ldr x8, .Lcmdline - - mov x0, #0 /* argc */ - mov x1, sp /* argv */ - ldr x2, .Lenvp /* envp */ - - /* Put NULL at end of argv array. */ - str PTR_REG (0), [x1, #-PTR_SIZE]! - - /* Skip leading blanks. */ -.Lnext: ldrb w3, [x8], #1 - cbz w3, .Lendstr - cmp w3, #' ' - b.eq .Lnext - - mov w4, #' ' /* Terminator is space. */ - - /* See whether we are scanning a quoted string by checking for - opening quote (" or '). */ - subs w9, w3, #'\"' - sub x8, x8, #1 /* Backup if no match. */ - ccmp w9, #('\'' - '\"'), 0x4 /* FLG_Z */, ne - csel w4, w3, w4, eq /* Terminator = quote if match. */ - cinc x8, x8, eq - - /* Push arg pointer to argv, and bump argc. */ - str PTR_REG (8), [x1, #-PTR_SIZE]! - add x0, x0, #1 - - /* Find end of arg string. */ -1: ldrb w3, [x8], #1 - cbz w3, .Lendstr - cmp w4, w3 /* Reached terminator? */ - b.ne 1b - - /* Terminate the arg string with NUL char. */ - mov w4, #0 - strb w4, [x8, #-1] - b .Lnext - - /* Reverse argv array. */ -.Lendstr: - add x3, x1, #0 /* sp = &argv[0] */ - add x4, x1, w0, uxtw #PTR_LOG_SIZE /* ep = &argv[argc] */ - cmp x4, x3 - b.lo 2f -1: ldr PTR_REG (5), [x4, #-PTR_SIZE] /* PTR_REG (5) = ep[-1] */ - ldr PTR_REG (6), [x3] /* PTR_REG (6) = *sp */ - str PTR_REG (6), [x4, #-PTR_SIZE]! /* *--ep = PTR_REG (6) */ - str PTR_REG (5), [x3], #PTR_SIZE /* *sp++ = PTR_REG (5) */ - cmp x4, x3 - b.hi 1b -2: - /* Move sp to the 16B boundary below argv. */ - and x4, x1, ~15 - mov sp, x4 - - bl FUNCTION (main) - - b FUNCTION (exit) /* Cannot return. */ - -/* Function initializing exception vector table, flatmap, etc. - Declared as weak symbol so that user can override this definition - by linking in their own version of the function. */ - .weak FUNCTION (_cpu_init_hook) -FUNCTION (_cpu_init_hook): - ret - - .align 3 -.LC0: - GEN_DWORD HeapBase -.LC1: - GEN_DWORD __bss_start__ -.LC2: - GEN_DWORD __bss_end__ -.Lfini: - GEN_DWORD FUNCTION(_fini) -.Lenvp: - GEN_DWORD env -.Lcmdline: - GEN_DWORD CommandLine - .dword 255 - -/* Workspace for Angel calls. */ - .data - .align 3 -/* Data returned by monitor SVC. */ -#if defined(__ILP32__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ - .set __stack_base__, StackBase + 4 -#else - .set __stack_base__, StackBase -#endif - .global __stack_base__ -HeapBase: .dword 0 -HeapLimit: .dword 0 -StackBase: .dword 0 -StackLimit: .dword 0 -env: .dword 0 /* Dummy environment array */ -CommandLine: .space 256,0 /* Maximum length of 255 chars handled. */ |