diff options
Diffstat (limited to 'newlib/libc/sys/arm')
| -rw-r--r-- | newlib/libc/sys/arm/Makefile.am | 14 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/Makefile.in | 320 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/aclocal.m4 | 282 | ||||
| -rwxr-xr-x | newlib/libc/sys/arm/configure | 1687 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/configure.in | 12 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/crt0.S | 245 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/libcfunc.c | 40 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/setjmp.S | 136 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/swi.h | 65 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/sys/param.h | 10 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/syscalls.c | 586 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/trap.S | 93 |
12 files changed, 0 insertions, 3490 deletions
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Hard-wiring this value - is not ideal, since there is currently no support for - checking that the heap and stack have not collided, or that - this default 64k is enough for the program being executed. - However, it ensures that this simple crt0 world will not - immediately cause an overflow event: */ - sub sl, sp, #64 << 10 /* Still assumes 256bytes below sl */ -#endif -#endif - mov a2, #0 /* Second arg: fill value */ - mov fp, a2 /* Null frame pointer */ - mov r7, a2 /* Null frame pointer for Thumb */ - - ldr a1, .LC1 /* First arg: start of memory block */ - ldr a3, .LC2 - sub a3, a3, a1 /* Third arg: length of block */ - - -#ifdef __thumb__ /* Enter Thumb mode.... */ - - add a4, pc, #1 /* Get the address of the Thumb block */ - bx a4 /* Go there and start Thumb decoding */ - - .code 16 - .global __change_mode - .thumb_func -__change_mode: -#endif - - bl FUNCTION (memset) -#if !defined (ARM_RDP_MONITOR) && !defined (ARM_RDI_MONITOR) - mov r0, #0 /* no arguments */ - mov r1, #0 /* no argv either */ -#else - /* Need to set up standard file handles */ - bl FUNCTION (initialise_monitor_handles) - -#ifdef ARM_RDP_MONITOR - swi SWI_GetEnv /* sets r0 to point to the command line */ - mov r1, r0 -#else - mov r0, #AngelSWI_Reason_GetCmdLine - adr r1, .LC30 /* Space for command line */ - swi AngelSWI - ldr r1, .LC30 -#endif - /* Parse string at r1 */ - mov r0, #0 /* count of arguments so far */ -.LC10: -/* Skip leading blanks */ -#ifdef __thumb__ - ldrb r3, [r1] - add r1, #1 -#else - ldrb r3, [r1], #1 -#endif - cmp r3, #0 - beq .LC12 - cmp r3, #' ' - beq .LC10 - -/* See whether we are scanning a string */ - cmp r3, #'"' -#ifdef __thumb__ - beq .LC20 - cmp r3, #'\'' - bne .LC21 -.LC20: - mov r2, r3 - b .LC22 - -.LC21: - mov r2, #' ' /* terminator type */ - sub r1, r1, #1 /* adjust back to point at start char */ -.LC22: -#else - cmpne r3, #'\'' - moveq r2, r3 - movne r2, #' ' /* terminator type */ - subne r1, r1, #1 /* adjust back to point at start char */ -#endif - -/* Stack a pointer to the current argument */ -#ifdef __thumb__ - push {r1} -#else - stmfd sp!, {r1} -#endif - add r0, r0, #1 -.LC11: -#ifdef __thumb__ - ldrb r3, [r1] - add r1, #1 -#else - ldrb r3, [r1], #1 -#endif - cmp r3, #0 - beq .LC12 - cmp r2, r3 /* reached terminator? */ - bne .LC11 - mov r2, #0 - sub r3, r1, #1 - strb r2, [r3] /* terminate the arg string */ - b .LC10 - -.LC12: - mov r1, sp /* point at stacked arg pointers */ - /* We've now got the stacked args in order reverse the */ -#ifdef __thumb__ - mov r2, r0 - lsl r2, #2 - add r2, sp - mov r3, sp -.LC15: cmp r2, r3 - bls .LC14 - sub r2, #4 - ldr r4, [r2] - ldr r5, [r3] - str r5, [r2] - str r4, [r3] - add r3, #4 - b .LC15 -.LC14: -#else - add r2, sp, r0, LSL #2 /* End of args */ - mov r3, sp /* Start of args */ -.LC13: cmp r2, r3 - ldrhi r4,[r2, #-4] /* Reverse ends of list */ - ldrhi r5, [r3] - strhi r5, [r2, #-4]! - strhi r4, [r3], #4 - bhi .LC13 -#endif - -#endif - bl FUNCTION (main) - - bl FUNCTION (exit) /* Should not return */ - -#ifdef __thumb__ - /* Come out of Thumb mode... This code should be redundant... */ - - mov a4, pc - bx a4 - - .code 32 - .global change_back -change_back: - /* Halt the execution. This code should never be executed. */ - /* - ** With no debug monitor, this probably aborts (eventually). - ** With a Demon debug monitor, this halts cleanly. - ** With an Angel debug monitor, this will report 'Unknown SWI'. - */ - swi SWI_Exit -#endif - - /* For Thumb, constants must be after the code since only - positive offsets are supported for PC relative addresses. */ - - .align 0 -.LC0: -#ifdef ARM_RDI_MONITOR - .word HeapBase -#else -#ifndef ARM_RDP_MONITOR -#ifdef __pe__ - .word 0x800000 -#else -/* .word 0x80000 */ /* Top of RAM on the PIE board */ -#endif -#endif -#endif -.LC1: - .word __bss_start__ -.LC2: - .word __bss_end__ - -#ifdef ARM_RDI_MONITOR -.LC30: .word CommandLine - .word 255 - -/* Workspace for Angel calls. */ - .data -/* Data returned by monitor SWI */ -HeapBase: .word 0 -HeapLimit: .word 0 -StackBase: .word 0 -StackLimit: .word 0 -CommandLine: .space 256,0 /* Maximum length of 255 chars handled */ -#endif - -#ifdef __pe__ - .section .idata$3 - .long 0,0,0,0,0,0,0,0 -#endif - diff --git a/newlib/libc/sys/arm/libcfunc.c b/newlib/libc/sys/arm/libcfunc.c deleted file mode 100644 index ddc611f..0000000 --- a/newlib/libc/sys/arm/libcfunc.c +++ /dev/null @@ -1,40 +0,0 @@ -/* Support files for GNU libc. Files in the C namespace go here. - Files in the system namespace (ie those that start with an underscore) - go in syscalls.c. - - Note: These functions are in a seperate file so that OS providers can - overrride the system call stubs (defined in syscalls.c) without having - to provide libc funcitons as well. */ -#include "swi.h" - -#ifdef ARM_RDI_MONITOR - -static inline int -do_AngelSWI (int reason, void * arg) -{ - int value; - asm volatile ("mov r0, %1; mov r1, %2; swi %a3; mov %0, r0" - : "=r" (value) /* Outputs */ - : "r" (reason), "r" (arg), "i" (AngelSWI) /* Inputs */ - : "r0", "r1", "lr" - /* Clobbers r0 and r1, and lr if in supervisor mode */); - return value; -} -#endif /* ARM_RDI_MONITOR */ - - -void -abort (void) -{ -#ifdef ARM_RDI_MONITOR - do_AngelSWI (AngelSWI_Reason_ReportException, - (void *) ADP_Stopped_RunTimeError); -#else - asm ("mov r0,#17\nswi %a0" :: "i" (SWI_Exit)); -#endif -} - -void -alarm (void) -{ -} diff --git a/newlib/libc/sys/arm/setjmp.S b/newlib/libc/sys/arm/setjmp.S deleted file mode 100644 index 5620154..0000000 --- a/newlib/libc/sys/arm/setjmp.S +++ /dev/null @@ -1,136 +0,0 @@ -/* This is a simple version of setjmp and longjmp. - - Nick Clifton, Cygnus Solutions, 13 June 1997. */ - -/* ANSI concatenation macros. */ -#define CONCAT(a, b) CONCAT2(a, b) -#define CONCAT2(a, b) a##b - -#ifndef __USER_LABEL_PREFIX__ -#error __USER_LABEL_PREFIX__ not defined -#endif - -#define SYM(x) CONCAT (__USER_LABEL_PREFIX__, x) - -#ifdef __ELF__ -#define TYPE(x) .type SYM(x),function -#define SIZE(x) .size SYM(x), . - SYM(x) -#else -#define TYPE(x) -#define SIZE(x) -#endif - -/* Arm/Thumb interworking support: - - The interworking scheme expects functions to use a BX instruction - to return control to their parent. Since we need this code to work - in both interworked and non-interworked environments as well as with - older processors which do not have the BX instruction we do the - following: - Test the return address. - If the bottom bit is clear perform an "old style" function exit. - (We know that we are in ARM mode and returning to an ARM mode caller). - Otherwise use the BX instruction to perform the function exit. - - We know that we will never attempt to perform the BX instruction on - an older processor, because that kind of processor will never be - interworked, and a return address with the bottom bit set will never - be generated. - - In addition, we do not actually assemble the BX instruction as this would - require us to tell the assembler that the processor is an ARM7TDMI and - it would store this information in the binary. We want this binary to be - able to be linked with binaries compiled for older processors however, so - we do not want such information stored there. - - If we are running using the APCS-26 convention however, then we never - test the bottom bit, because this is part of the processor status. - Instead we just do a normal return, since we know that we cannot be - returning to a Thumb caller - the Thumb does not support APCS-26. - - Function entry is much simpler. If we are compiling for the Thumb we - just switch into ARM mode and then drop through into the rest of the - function. The function exit code will take care of the restore to - Thumb mode. */ - -#ifdef __APCS_26__ -#define RET movs pc, lr -#else -#define RET tst lr, #1; \ - moveq pc, lr ; \ -.word 0xe12fff1e /* bx lr */ -#endif - -#ifdef __thumb__ -#define MODE .thumb_func -.macro PROLOGUE name - bx pc - nop - .code 32 -SYM (.arm_start_of.\name): -.endm -#else -#define MODE .code 32 -.macro PROLOGUE name -.endm -#endif - -.macro FUNC_START name - .text - .align 2 - MODE - .globl SYM (\name) - TYPE (\name) -SYM (\name): - PROLOGUE \name -.endm - -.macro FUNC_END name - RET - SIZE (\name) -.endm - -/* -------------------------------------------------------------------- - int setjmp (jmp_buf); - -------------------------------------------------------------------- */ - - FUNC_START setjmp - - /* Save all the callee-preserved registers into the jump buffer. */ - stmea a1!, { v1-v7, fp, ip, sp, lr } - -#if 0 /* Simulator does not cope with FP instructions yet. */ -#ifndef __SOFTFP__ - /* Save the floating point registers. */ - sfmea f4, 4, [a1] -#endif -#endif - /* When setting up the jump buffer return 0. */ - mov a1, #0 - - FUNC_END setjmp - -/* -------------------------------------------------------------------- - volatile void longjmp (jmp_buf, int); - -------------------------------------------------------------------- */ - - FUNC_START longjmp - - /* If we have stack extension code it ought to be handled here. */ - - /* Restore the registers, retrieving the state when setjmp() was called. */ - ldmfd a1!, { v1-v7, fp, ip, sp, lr } - -#if 0 /* Simulator does not cope with FP instructions yet. */ -#ifndef __SOFTFP__ - /* Restore floating point registers as well. */ - lfmfd f4, 4, [a1] -#endif -#endif - /* Put the return value into the integer result register. - But if it is zero then return 1 instead. */ - movs a1, a2 - moveq a1, #1 - - FUNC_END longjmp - diff --git a/newlib/libc/sys/arm/swi.h b/newlib/libc/sys/arm/swi.h deleted file mode 100644 index 91fad59..0000000 --- a/newlib/libc/sys/arm/swi.h +++ /dev/null @@ -1,65 +0,0 @@ - -/***************************************************************************\ -* SWI numbers * -\***************************************************************************/ - -/* SWI numbers for RDP (Demon) monitor */ -#define SWI_WriteC 0x0 -#define SWI_Write0 0x2 -#define SWI_ReadC 0x4 -#define SWI_CLI 0x5 -#define SWI_GetEnv 0x10 -#define SWI_Exit 0x11 -#define SWI_EnterOS 0x16 - -#define SWI_GetErrno 0x60 -#define SWI_Clock 0x61 -#define SWI_Time 0x63 -#define SWI_Remove 0x64 -#define SWI_Rename 0x65 -#define SWI_Open 0x66 - -#define SWI_Close 0x68 -#define SWI_Write 0x69 -#define SWI_Read 0x6a -#define SWI_Seek 0x6b -#define SWI_Flen 0x6c - -#define SWI_IsTTY 0x6e -#define SWI_TmpNam 0x6f -#define SWI_InstallHandler 0x70 -#define SWI_GenerateError 0x71 - - -/* Now the SWI numbers and reason codes for RDI (Angel) monitors */ -#define AngelSWI_ARM (0x123456) -#ifdef __thumb__ -#define AngelSWI (0xAB) -#else -#define AngelSWI AngelSWI_ARM -#endif - -/* The reason codes: */ -#define AngelSWI_Reason_Open (0x01) -#define AngelSWI_Reason_Close (0x02) -#define AngelSWI_Reason_WriteC (0x03) -#define AngelSWI_Reason_Write0 (0x04) -#define AngelSWI_Reason_Write (0x05) -#define AngelSWI_Reason_Read (0x06) -#define AngelSWI_Reason_ReadC (0x07) -#define AngelSWI_Reason_IsTTY (0x09) -#define AngelSWI_Reason_Seek (0x0A) -#define AngelSWI_Reason_FLen (0x0C) -#define AngelSWI_Reason_TmpNam (0x0D) -#define AngelSWI_Reason_Remove (0x0E) -#define AngelSWI_Reason_Rename (0x0F) -#define AngelSWI_Reason_Clock (0x10) -#define AngelSWI_Reason_Time (0x11) -#define AngelSWI_Reason_System (0x12) -#define AngelSWI_Reason_Errno (0x13) -#define AngelSWI_Reason_GetCmdLine (0x15) -#define AngelSWI_Reason_HeapInfo (0x16) -#define AngelSWI_Reason_EnterSVC (0x17) -#define AngelSWI_Reason_ReportException (0x18) -#define ADP_Stopped_ApplicationExit ((2 << 16) + 38) -#define ADP_Stopped_RunTimeError ((2 << 16) + 34) diff --git a/newlib/libc/sys/arm/sys/param.h b/newlib/libc/sys/arm/sys/param.h deleted file mode 100644 index 968c8ef..0000000 --- a/newlib/libc/sys/arm/sys/param.h +++ /dev/null @@ -1,10 +0,0 @@ -/* ARM configuration file; HZ is 100 rather than the default 60 */ - -#ifndef _SYS_PARAM_H -# define _SYS_PARAM_H - -# define HZ (100) -# define NOFILE (60) -# define PATHSIZE (1024) - -#endif diff --git a/newlib/libc/sys/arm/syscalls.c b/newlib/libc/sys/arm/syscalls.c deleted file mode 100644 index 795f778..0000000 --- a/newlib/libc/sys/arm/syscalls.c +++ /dev/null @@ -1,586 +0,0 @@ -/* Support files for GNU libc. Files in the system namespace go here. - Files in the C namespace (ie those that do not start with an - underscore) go in .c. */ - -#include <_ansi.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/fcntl.h> -#include <stdio.h> -#include <time.h> -#include <sys/time.h> -#include <sys/times.h> -#include <errno.h> -#include <reent.h> -#include "swi.h" - -/* Forward prototypes. */ -int isatty _PARAMS ((int)); -clock_t _times _PARAMS ((struct tms *)); -int _gettimeofday _PARAMS ((struct timeval *, struct timezone *)); -void _raise _PARAMS ((void)); -int _unlink _PARAMS ((void)); -int _link _PARAMS ((void)); -int _fstat _PARAMS ((int, struct stat *)); -caddr_t _sbrk _PARAMS ((int)); -int _getpid _PARAMS ((int)); -int _kill _PARAMS ((int, int)); -void _exit _PARAMS ((int)); -int _close _PARAMS ((int)); -int _swiclose _PARAMS ((int)); -int _open _PARAMS ((const char *, int, ...)); -int _swiopen _PARAMS ((const char *, int)); -int _write _PARAMS ((int, char *, int)); -int _swiwrite _PARAMS ((int, char *, int)); -int _lseek _PARAMS ((int, int, int)); -int _swilseek _PARAMS ((int, int, int)); -int _read _PARAMS ((int, char *, int)); -int _swiread _PARAMS ((int, char *, int)); -void initialise_monitor_handles _PARAMS ((void)); - -static int wrap _PARAMS ((int)); -static int error _PARAMS ((int)); -static int get_errno _PARAMS ((void)); -static int remap_handle _PARAMS ((int)); -static int do_AngelSWI _PARAMS ((int, void *)); -static int findslot _PARAMS ((int)); - -/* Register name faking - works in collusion with the linker. */ -register char * stack_ptr asm ("sp"); - - -/* following is copied from libc/stdio/local.h to check std streams */ -extern void _EXFUN(__sinit,(struct _reent *)); -#define CHECK_INIT(fp) \ - do \ - { \ - if ((fp)->_data == 0) \ - (fp)->_data = _REENT; \ - if (!(fp)->_data->__sdidinit) \ - __sinit ((fp)->_data); \ - } \ - while (0) - -/* Adjust our internal handles to stay away from std* handles. */ -#define FILE_HANDLE_OFFSET (0x20) - -static int std_files_checked; -static int monitor_stdin; -static int monitor_stdout; -static int monitor_stderr; - -/* Struct used to keep track of the file position, just so we - can implement fseek(fh,x,SEEK_CUR). */ -typedef struct -{ - int handle; - int pos; -} -poslog; - -#define MAX_OPEN_FILES 20 -static poslog openfiles [MAX_OPEN_FILES]; - -static int -findslot (int fh) -{ - int i; - for (i = 0; i < MAX_OPEN_FILES; i ++) - if (openfiles[i].handle == fh) - break; - return i; -} - -#ifdef ARM_RDI_MONITOR - -static inline int -do_AngelSWI (int reason, void * arg) -{ - int value; - asm volatile ("mov r0, %1; mov r1, %2; swi %a3; mov %0, r0" - : "=r" (value) /* Outputs */ - : "r" (reason), "r" (arg), "i" (AngelSWI) /* Inputs */ - : "r0", "r1", "r2", "r3", "ip", "lr", "memory", "cc" - /* Clobbers r0 and r1, and lr if in supervisor mode */); - /* Accordingly to page 13-77 of ARM DUI 0040D other registers - can also be clobbered. Some memory positions may also be - changed by a system call, so they should not be kept in - registers. Note: we are assuming the manual is right and - Angel is respecting the APCS. */ - return value; -} -#endif /* ARM_RDI_MONITOR */ - -/* Function to convert std(in|out|err) handles to internal versions. */ -static int -remap_handle (int fh) -{ - if (!std_files_checked) - { - CHECK_INIT(stdin); - CHECK_INIT(stdout); - CHECK_INIT(stderr); - std_files_checked = 1; - } - if (fh == __sfileno (stdin)) - return monitor_stdin; - if (fh == __sfileno (stdout)) - return monitor_stdout; - if (fh == __sfileno (stderr)) - return monitor_stderr; - - return fh - FILE_HANDLE_OFFSET; -} - -void -initialise_monitor_handles (void) -{ - int i; - -#ifdef ARM_RDI_MONITOR - int volatile block[3]; - - block[0] = (int) ":tt"; - block[2] = 3; /* length of filename */ - block[1] = 0; /* mode "r" */ - monitor_stdin = do_AngelSWI (AngelSWI_Reason_Open, (void *) block); - - block[0] = (int) ":tt"; - block[2] = 3; /* length of filename */ - block[1] = 4; /* mode "w" */ - monitor_stdout = monitor_stderr = do_AngelSWI (AngelSWI_Reason_Open, (void *) block); -#else - int fh; - const char * name; - - name = ":tt"; - asm ("mov r0,%2; mov r1, #0; swi %a1; mov %0, r0" - : "=r"(fh) - : "i" (SWI_Open),"r"(name) - : "r0","r1"); - monitor_stdin = fh; - - name = ":tt"; - asm ("mov r0,%2; mov r1, #4; swi %a1; mov %0, r0" - : "=r"(fh) - : "i" (SWI_Open),"r"(name) - : "r0","r1"); - monitor_stdout = monitor_stderr = fh; -#endif - - for (i = 0; i < MAX_OPEN_FILES; i ++) - openfiles[i].handle = -1; - - openfiles[0].handle = monitor_stdin; - openfiles[0].pos = 0; - openfiles[1].handle = monitor_stdout; - openfiles[1].pos = 0; -} - -static int -get_errno (void) -{ -#ifdef ARM_RDI_MONITOR - return do_AngelSWI (AngelSWI_Reason_Errno, NULL); -#else - asm ("swi %a0" :: "i" (SWI_GetErrno)); -#endif -} - -static int -error (int result) -{ - errno = get_errno (); - return result; -} - -static int -wrap (int result) -{ - if (result == -1) - return error (-1); - return result; -} - -/* Returns # chars not! written. */ -int -_swiread (int file, - char * ptr, - int len) -{ - int fh = remap_handle (file); -#ifdef ARM_RDI_MONITOR - int block[3]; - - block[0] = fh; - block[1] = (int) ptr; - block[2] = len; - - return do_AngelSWI (AngelSWI_Reason_Read, block); -#else - asm ("mov r0, %1; mov r1, %2;mov r2, %3; swi %a0" - : /* No outputs */ - : "i"(SWI_Read), "r"(fh), "r"(ptr), "r"(len) - : "r0","r1","r2"); -#endif -} - -int -_read (int file, - char * ptr, - int len) -{ - int slot = findslot (remap_handle (file)); - int x = _swiread (file, ptr, len); - - if (x < 0) - return error (-1); - - if (slot != MAX_OPEN_FILES) - openfiles [slot].pos += len - x; - - /* x == len is not an error, at least if we want feof() to work. */ - return len - x; -} - -int -_swilseek (int file, - int ptr, - int dir) -{ - int res; - int fh = remap_handle (file); - int slot = findslot (fh); -#ifdef ARM_RDI_MONITOR - int block[2]; -#endif - - if (dir == SEEK_CUR) - { - if (slot == MAX_OPEN_FILES) - return -1; - ptr = openfiles[slot].pos + ptr; - dir = SEEK_SET; - } - -#ifdef ARM_RDI_MONITOR - if (dir == SEEK_END) - { - block[0] = fh; - ptr += do_AngelSWI (AngelSWI_Reason_FLen, block); - } - - /* This code only does absolute seeks. */ - block[0] = remap_handle (file); - block[1] = ptr; - res = do_AngelSWI (AngelSWI_Reason_Seek, block); -#else - if (dir == SEEK_END) - { - asm ("mov r0, %2; swi %a1; mov %0, r0" - : "=r" (res) - : "i" (SWI_Flen), "r" (fh) - : "r0"); - ptr += res; - } - - /* This code only does absolute seeks. */ - asm ("mov r0, %2; mov r1, %3; swi %a1; mov %0, r0" - : "=r" (res) - : "i" (SWI_Seek), "r" (fh), "r" (ptr) - : "r0", "r1"); -#endif - - if (slot != MAX_OPEN_FILES && res == 0) - openfiles[slot].pos = ptr; - - /* This is expected to return the position in the file. */ - return res == 0 ? ptr : -1; -} - -int -_lseek (int file, - int ptr, - int dir) -{ - return wrap (_swilseek (file, ptr, dir)); -} - -/* Returns #chars not! written. */ -int -_swiwrite ( - int file, - char * ptr, - int len) -{ - int fh = remap_handle (file); -#ifdef ARM_RDI_MONITOR - int block[3]; - - block[0] = fh; - block[1] = (int) ptr; - block[2] = len; - - return do_AngelSWI (AngelSWI_Reason_Write, block); -#else - asm ("mov r0, %1; mov r1, %2;mov r2, %3; swi %a0" - : /* No outputs */ - : "i"(SWI_Write), "r"(fh), "r"(ptr), "r"(len) - : "r0","r1","r2"); -#endif -} - -int -_write (int file, - char * ptr, - int len) -{ - int slot = findslot (remap_handle (file)); - int x = _swiwrite (file, ptr,len); - - if (x == -1 || x == len) - return error (-1); - - if (slot != MAX_OPEN_FILES) - openfiles[slot].pos += len - x; - - return len - x; -} - -extern int strlen (const char *); - -int -_swiopen (const char * path, - int flags) -{ - int aflags = 0, fh; -#ifdef ARM_RDI_MONITOR - int block[3]; -#endif - - int i = findslot (-1); - - if (i == MAX_OPEN_FILES) - return -1; - - /* The flags are Unix-style, so we need to convert them. */ -#ifdef O_BINARY - if (flags & O_BINARY) - aflags |= 1; -#endif - - if (flags & O_RDWR) - aflags |= 2; - - if (flags & O_CREAT) - aflags |= 4; - - if (flags & O_TRUNC) - aflags |= 4; - - if (flags & O_APPEND) - { - aflags &= ~4; /* Can't ask for w AND a; means just 'a'. */ - aflags |= 8; - } - -#ifdef ARM_RDI_MONITOR - block[0] = (int) path; - block[2] = strlen (path); - block[1] = aflags; - - fh = do_AngelSWI (AngelSWI_Reason_Open, block); - -#else - asm ("mov r0,%2; mov r1, %3; swi %a1; mov %0, r0" - : "=r"(fh) - : "i" (SWI_Open),"r"(path),"r"(aflags) - : "r0","r1"); -#endif - - if (fh >= 0) - { - openfiles[i].handle = fh; - openfiles[i].pos = 0; - } - - return fh >= 0 ? fh + FILE_HANDLE_OFFSET : error (fh); -} - -int -_open (const char * path, - int flags, - ...) -{ - return wrap (_swiopen (path, flags)); -} - -int -_swiclose (int file) -{ - int myhan = remap_handle (file); - int slot = findslot (myhan); - - if (slot != MAX_OPEN_FILES) - openfiles[slot].handle = -1; - -#ifdef ARM_RDI_MONITOR - return do_AngelSWI (AngelSWI_Reason_Close, & myhan); -#else - asm ("mov r0, %1; swi %a0" :: "i" (SWI_Close),"r"(myhan):"r0"); -#endif -} - -int -_close (int file) -{ - return wrap (_swiclose (file)); -} - -void -_exit (int n) -{ - /* FIXME: return code is thrown away. */ - -#ifdef ARM_RDI_MONITOR - do_AngelSWI (AngelSWI_Reason_ReportException, - (void *) ADP_Stopped_ApplicationExit); -#else - asm ("swi %a0" :: "i" (SWI_Exit)); -#endif - n = n; -} - -int -_kill (int n, int m) -{ -#ifdef ARM_RDI_MONITOR - return do_AngelSWI (AngelSWI_Reason_ReportException, - (void *) ADP_Stopped_ApplicationExit); -#else - asm ("swi %a0" :: "i" (SWI_Exit)); -#endif - n = n; m = m; -} - -int -_getpid (int n) -{ - return 1; - n = n; -} - -extern void abort (void); - -caddr_t -_sbrk (int incr) -{ - extern char end asm ("end"); /* Defined by the linker. */ - static char * heap_end; - char * prev_heap_end; - - if (heap_end == NULL) - heap_end = & end; - - prev_heap_end = heap_end; - - if (heap_end + incr > stack_ptr) - { - _write (1, "_sbrk: Heap and stack collision\n", 32); - abort (); - } - - heap_end += incr; - - return (caddr_t) prev_heap_end; -} - -extern void memset (struct stat *, int, unsigned int); - -int -_fstat (int file, struct stat * st) -{ - memset (st, 0, sizeof (* st)); - st->st_mode = S_IFCHR; - st->st_blksize = 1024; - return 0; - file = file; -} - -int -_link (void) -{ - return -1; -} - -int -_unlink (void) -{ - return -1; -} - -void -_raise (void) -{ - return; -} - -int -_gettimeofday (struct timeval * tp, struct timezone * tzp) -{ - - if (tp) - { - /* Ask the host for the seconds since the Unix epoch. */ -#ifdef ARM_RDI_MONITOR - tp->tv_sec = do_AngelSWI (AngelSWI_Reason_Time,NULL); -#else - { - int value; - asm ("swi %a1; mov %0, r0" : "=r" (value): "i" (SWI_Time) : "r0"); - tp->tv_sec = value; - } -#endif - tp->tv_usec = 0; - } - - /* Return fixed data for the timezone. */ - if (tzp) - { - tzp->tz_minuteswest = 0; - tzp->tz_dsttime = 0; - } - - return 0; -} - -/* Return a clock that ticks at 100Hz. */ -clock_t -_times (struct tms * tp) -{ - clock_t timeval; - -#ifdef ARM_RDI_MONITOR - timeval = do_AngelSWI (AngelSWI_Reason_Clock,NULL); -#else - asm ("swi %a1; mov %0, r0" : "=r" (timeval): "i" (SWI_Clock) : "r0"); -#endif - - if (tp) - { - tp->tms_utime = timeval; /* user time */ - tp->tms_stime = 0; /* system time */ - tp->tms_cutime = 0; /* user time, children */ - tp->tms_cstime = 0; /* system time, children */ - } - - return timeval; -}; - - -int -isatty (int fd) -{ - return 1; - fd = fd; -} diff --git a/newlib/libc/sys/arm/trap.S b/newlib/libc/sys/arm/trap.S deleted file mode 100644 index 328fabc..0000000 --- a/newlib/libc/sys/arm/trap.S +++ /dev/null @@ -1,93 +0,0 @@ - /* Run-time exception support */ -#include "swi.h" - -/* .text is used instead of .section .text so it works with arm-aout too. */ - .text - .align 0 - .global __rt_stkovf_split_big - .global __rt_stkovf_split_small - -/* The following functions are provided for software stack checking. - If hardware stack-checking is being used then the code can be - compiled without the PCS entry checks, and simply rely on VM - management to extend the stack for a thread. - - The stack extension event occurs when the PCS function entry code - would result in a stack-pointer beneath the stack-limit register - value. The system relies on the following map: - - +-----------------------------------+ <-- end of stack block - | ... | - | ... | - | active stack | - | ... | <-- sp (stack-pointer) somewhere in here - | ... | - +-----------------------------------+ <-- sl (stack-limit) - | stack-extension handler workspace | - +-----------------------------------+ <-- base of stack block - - The "stack-extension handler workspace" is an amount of memory in - which the stack overflow support code must execute. It must be - large enough to deal with the worst case path through the extension - code. At the moment the compiler expects this to be AT LEAST - 256bytes. It uses this fact to code functions with small local - data usage within the overflow space. - - In a true target environment We may need to increase the space - between sl and the true limit to allow for the stack extension - code, SWI handlers and for undefined instruction handlers of the - target environment. */ - -__rt_stkovf_split_small: - mov ip,sp @ Ensure we can calculate the stack required - @ and fall through to... -__rt_stkovf_split_big: - @ in: sp = current stack-pointer (beneath stack-limit) - @ sl = current stack-limit - @ ip = low stack point we require for the current function - @ lr = return address into the current function - @ fp = frame-pointer - @ original sp --> +----------------------------------+ - @ | pc (12 ahead of PCS entry store) | - @ current fp ---> +----------------------------------+ - @ | lr (on entry) pc (on exit) | - @ +----------------------------------+ - @ | sp ("original sp" on entry) | - @ +----------------------------------+ - @ | fp (on entry to function) | - @ +----------------------------------+ - @ | | - @ | ..argument and work registers.. | - @ | | - @ current sp ---> +----------------------------------+ - @ - @ The "current sl" is somewhere between "original sp" and "current sp" - @ but above "true sl". The "current sl" should be at least 256bytes - @ above the "true sl". The 256byte stack guard should be large enough - @ to deal with the worst case function entry stacking (160bytes) plus - @ the stack overflow handler stacking requirements, plus the stack - @ required for the memory allocation routines. - @ - @ Normal PCS entry (before stack overflow check) can stack 16 - @ standard registers (64bytes) and 8 floating point registers - @ (96bytes). This gives a minimum stack guard of 160bytes (excluding - @ the stack required for the code). (Actually only a maximum of - @ 14standard registers are ever stacked on entry to a function). - @ - @ NOTE: Structure returns are performed by the caller allocating a - @ dummy space on the stack and passing in a "phantom" arg1 into - @ the function. This means that we do not need to worry about - @ preserving the stack under "sp" even on function return. - @ - @ Code should never poke values beneath sp. The sp register - @ should always be "dropped" first to cover the data. This - @ protects the data against any events that may try and use - @ the stack. - - SUB ip, sp, ip @ extra stack required for function - @ Add stack extension code here. If desired a new stack chunk - @ can be allocated, and the register state updated suitably. - - @ We now know how much extra stack the function requires. - @ Terminate the program for the moment: - swi SWI_Exit |