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2001-02-28 Will Cohen <wcohen@redhat.com>

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* src/libgloss/m68k/Makefile.in: Updated copyright and
         added rules to build simulator related libraries.
        (SIM_SCRIPTS): New variable.
        (SIM_LDFLAGS): New variable.
        (SIM_BSP): New variable.
        (SIM_CRT0): New variable.
        (SIM_OBJS): New variable.
        (SIM_TEST): New variable.
        (SIM_INSTALL): new variable.
        * src/libgloss/m68k/sim-abort.c: New file.
        * src/libgloss/m68k/sim-crt0.S: New file.
        * src/libgloss/m68k/sim-errno.c: New file.
        * src/libgloss/m68k/sim-funcs.c: New file.
        * src/libgloss/m68k/sim-inbyte.c: New file.
        * src/libgloss/m68k/sim-print.c: New file.
        * src/libgloss/m68k/sim-sbrk.c: New file.
        * src/libgloss/m68k/sim.ld: New file.
        * src/libgloss/m68k/simulator.S: New file.
This commit is contained in:
Jeff Johnston 2001-02-28 18:41:57 +00:00
parent 2de7601434
commit 09ccfcee50
11 changed files with 513 additions and 2 deletions
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21
libgloss/ChangeLog
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@ -1,3 +1,24 @@
2001-02-28 Will Cohen <wcohen@redhat.com>
* src/libgloss/m68k/Makefile.in: Updated copyright and
added rules to build simulator related libraries.
(SIM_SCRIPTS): New variable.
(SIM_LDFLAGS): New variable.
(SIM_BSP): New variable.
(SIM_CRT0): New variable.
(SIM_OBJS): New variable.
(SIM_TEST): New variable.
(SIM_INSTALL): new variable.
* src/libgloss/m68k/sim-abort.c: New file.
* src/libgloss/m68k/sim-crt0.S: New file.
* src/libgloss/m68k/sim-errno.c: New file.
* src/libgloss/m68k/sim-funcs.c: New file.
* src/libgloss/m68k/sim-inbyte.c: New file.
* src/libgloss/m68k/sim-print.c: New file.
* src/libgloss/m68k/sim-sbrk.c: New file.
* src/libgloss/m68k/sim.ld: New file.
* src/libgloss/m68k/simulator.S: New file.
2001-02-22 Jeff Johnston <jjohnstn@redhat.com>
* mn10200/access.c: With DJ Delorie's permission, this code is

25
libgloss/m68k/Makefile.in
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@ -1,4 +1,4 @@
# Copyright (c) 1995, 1996 Cygnus Support
# Copyright (c) 1995, 1996, 2001 Cygnus Support
#
# The authors hereby grant permission to use, copy, modify, distribute,
# and license this software and its documentation for any purpose, provided
@ -68,6 +68,17 @@ OBJS = close.o fstat.o getpid.o isatty.o kill.o \
CFLAGS = -g
# ARFLAGS = rv
# Here is all of the simulator stuff
SIM_SCRIPTS = sim.ld
SIM_LDFLAGS = -Tsim.ld
SIM_BSP = libsim.a
SIM_CRT0 = sim-crt0.o
SIM_OBJS = sim-print.o sim-inbyte.o sim-sbrk.o sim-abort.o sim-errno.o simulator.o sim-funcs.o unlink.o
SIM_TEST =
SIM_INSTALL = install-sim
CRT0 = crt0.o
#
# here's all the MVME135 target stuff
@ -111,11 +122,15 @@ DBUG_OBJS= dbug-exit.o dbug-inbyte.o dbug-outbyte.o
# build a test program for each target board. Just trying to get
# it to link is a good test, so we ignore all the errors for now.
#
all: ${CRT0} ${BCC_BSP} ${IDP_BSP} ${MVME135_BSP} ${MVME162_BSP} ${DBUG_BSP}
all: ${SIM_CRT0} ${SIM_BSP} ${CRT0} ${BCC_BSP} ${IDP_BSP} ${MVME135_BSP} ${MVME162_BSP} ${DBUG_BSP}
#
# here's where we build the board support packages for each target
#
${SIM_BSP}: ${SIM_OBJS}
${AR} ${ARFLAGS} $@ ${SIM_OBJS}
${RANLIB} $@
${BCC_BSP}: $(OBJS) ${BCC_OBJS}
${AR} ${ARFLAGS} $@ $(OBJS) ${BCC_OBJS}
${RANLIB} $@
@ -214,9 +229,15 @@ dtor.x: dtor.o ${CRT0} ${srcdir}/mvme135.ld Makefile ${MVME135_BSP}
${CC} -L${srcdir} -L${objdir} dtor.o -o $@ $(LIBS_FOR_TARGET) \
-N -Wl,-Tmvme135.ld -nostdlib
unlink.o: $(srcdir)/../unlink.c
.PHONY: install info dvi doc install-info clean-info
install:
# install SIM stuff
$(INSTALL_PROGRAM) $(SIM_CRT0) $(tooldir)/lib${MULTISUBDIR}/$(SIM_CRT0)
$(INSTALL_PROGRAM) $(SIM_BSP) $(tooldir)/lib${MULTISUBDIR}/$(SIM_BSP)
$(INSTALL_DATA) ${srcdir}/sim.ld $(tooldir)/lib${MULTISUBDIR}/sim.ld
#
$(INSTALL_PROGRAM) $(CRT0) $(tooldir)/lib${MULTISUBDIR}/$(CRT0)
# install BCC stuff
$(INSTALL_PROGRAM) $(BCC_BSP) $(tooldir)/lib${MULTISUBDIR}/$(BCC_BSP)

21
libgloss/m68k/sim-abort.c Normal file
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@ -0,0 +1,21 @@
/*
* sim-abort.c -- m68k abort support when running under the simulator.
*
* Copyright (c) 1995, 2001 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
void abort(void)
{
write (2, "Abort called.\n", sizeof("Abort called.\n")-1);
exit (1);
}

121
libgloss/m68k/sim-crt0.S Normal file
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/*
* crt0.S -- startup file for m68k-coff
*
* Copyright (c) 1995, 1996, 1998, 2001 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#include "asm.h"
.title "crt0.S for m68k-coff"
#define STACKSIZE 0x4000
/*
* Define an empty environment.
*/
.data
.align 2
SYM (environ):
.long 0
.align 2
.text
/*
* These symbols are defined in C code, so they need to always be
* named with SYM because of the difference between object file formats.
*/
/* These are defined in C code. */
.extern SYM (main)
.extern SYM (exit)
.extern SYM (atexit)
.extern SYM(__do_global_dtors)
/*
* These values are set in the linker script, so they must be
* explicitly named here without SYM.
*/
.extern __stack
.extern __bss_start
.extern _end
/*
* set things up so the application will run. This *must* be called start.
*/
.global SYM (start)
SYM (start):
/* See if user supplied their own stack (__stack != 0). If not, then
* default to using the value of %sp as set by the ROM monitor.
*/
movel IMM(__stack), a0
cmpl IMM(0), a0
jbeq 1f
movel a0, sp
1:
/* set up initial stack frame */
link a6, IMM(-8)
/*
* zero out the bss section.
*/
movel IMM(__bss_start), d1
movel IMM(_end), d0
cmpl d0, d1
jbeq 3f
movl d1, a0
subl d1, d0
subql IMM(1), d0
2:
clrb (a0)+
#ifndef __mcf5200__
dbra d0, 2b
clrw d0
subql IMM(1), d0
jbcc 2b
#else
subql IMM(1), d0
jbpl 2b
#endif
3:
/*
* call the main routine from the application to get it going.
* main (argc, argv, environ)
* we pass argv as a pointer to NULL.
*/
#ifdef ADD_DTORS
/* put __do_global_dtors in the atexit list so the destructors get run */
movel IMM (SYM(__do_global_dtors)),(sp)
jsr SYM (atexit)
#endif
movel IMM (__FINI_SECTION__),(sp)
jsr SYM (atexit)
jsr __INIT_SECTION__
pea 0
pea SYM (environ)
pea sp@(4)
pea 0
jsr SYM (main)
movel d0, sp@-
/*
* drop down into exit incase the user doesn't. This should drop
* control back to the ROM monitor, if there is one. This calls the
* exit() from the C library so the C++ tables get cleaned up right.
*/
jsr SYM (exit)

28
libgloss/m68k/sim-errno.c Normal file
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@ -0,0 +1,28 @@
/*
* sim-errno.c -- return address of errno for current thread.
*
* Copyright (c) 1995, 2001 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
/* syscall handler branches here in case of error. */
extern int *__errno();
int
_cerror (e)
int e;
{
*__errno() = e;
return -1;
}

29
libgloss/m68k/sim-funcs.c Normal file
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@ -0,0 +1,29 @@
/* sim-funcs.c - random needed simulator functions
*
* Copyright (c) 2001 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#include <unistd.h>
int
kill(int pid, int sig)
{
exit(0xdead);
}
pid_t
getpid()
{
return 42;
}

26
libgloss/m68k/sim-inbyte.c Normal file
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@ -0,0 +1,26 @@
/*
* sim-inbyte.c -- read a character from standard input.
*
* Copyright (c) 1995, 2001 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
int
inbyte ()
{
char c;
if (read (0, &c, 1) <= 0)
return -1;
return c;
}

43
libgloss/m68k/sim-print.c Normal file
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@ -0,0 +1,43 @@
/* sim-print.c -- print a string on the output device.
*
* Copyright (c) 1995, 2001 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
/*
* print -- do a raw print of a string
*/
void
print (ptr)
char *ptr;
{
int len = 0;
char *p = ptr;
while (*p != '\0')
p++;
write (1, ptr, p-ptr);
}
/*
* outbyte -- write a single character.
*/
void
outbyte (c_int)
int c_int;
{
char c = c_int;
write (1, &c, 1);
}

30
libgloss/m68k/sim-sbrk.c Normal file
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@ -0,0 +1,30 @@
/*
* sim-sbrk.c -- m68k sbrk support when running under the simulator.
*
* Copyright (c) 1995, 2001 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
extern char _end[];
static char *curbrk = _end;
char *
sbrk (incr)
int incr;
{
char *oldbrk = curbrk;
curbrk += incr;
if (brk (curbrk) == -1)
return (char *) -1;
return oldbrk;
}

87
libgloss/m68k/sim.ld Normal file
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@ -0,0 +1,87 @@
STARTUP(sim-crt0.o)
OUTPUT_ARCH(m68k)
SEARCH_DIR(.)
GROUP(-lsim -lc -lgcc -lsim)
__DYNAMIC = 0;
MEMORY
{
ram (rwx) : ORIGIN = 0x80000000, LENGTH = 1M
}
PROVIDE (__stack = 0);
SECTIONS
{
.text :
{
CREATE_OBJECT_SYMBOLS
*(.text)
. = ALIGN(0x4);
/* These are for running static constructors and destructors under ELF. */
KEEP (*crtbegin.o(.ctors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
KEEP (*crtbegin.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
*(.rodata)
. = ALIGN(0x4);
*(.gcc_except_table)
. = ALIGN(0x4);
*(.eh_frame)
. = ALIGN(0x4);
__INIT_SECTION__ = . ;
LONG (0x4e560000) /* linkw %fp,#0 */
*(.init)
SHORT (0x4e5e) /* unlk %fp */
SHORT (0x4e75) /* rts */
. = ALIGN(0x4);
__FINI_SECTION__ = . ;
LONG (0x4e560000) /* linkw %fp,#0 */
*(.fini)
SHORT (0x4e5e) /* unlk %fp */
SHORT (0x4e75) /* rts */
_etext = .;
*(.lit)
} > ram
.data :
{
*(.shdata)
*(.data)
_edata = .;
} > ram
.bss :
{
. = ALIGN(0x4);
__bss_start = . ;
*(.shbss)
*(.bss)
*(COMMON)
_end = ALIGN (0x8);
__end = _end;
} > ram
.stab 0 (NOLOAD) :
{
*(.stab)
}
.stabstr 0 (NOLOAD) :
{
*(.stabstr)
}
}

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libgloss/m68k/simulator.S Normal file
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@ -0,0 +1,84 @@
/*
* simulator.S -- m68k simulator system calls.
*
* Copyright (c) 1995, 2001 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#include "asm.h"
#define SYSCALL(x) .word 0x4afc, x
#define FUNC_START(x) .globl x; x:
#define FUNC_END(x)
#define FUNC_NAME(x) SYM(x)
FUNC_START(_exit)
SYSCALL(1)
/*
* Insure that the debugger tells the client that the PC is in _exit,
* not whatever function happens to follow this function.
*/
0: nop
jmp 0b /* we never should return, but... */
FUNC_END(_exit)
FUNC_START(read)
SYSCALL(3)
bcs FUNC_NAME(_cerror)
rts
FUNC_END(read)
FUNC_START(write)
SYSCALL(4)
bcs FUNC_NAME(_cerror)
rts
FUNC_END(write)
FUNC_START(open)
SYSCALL(5)
bcs FUNC_NAME(_cerror)
rts
FUNC_END(open)
FUNC_START(close)
SYSCALL(6)
bcs FUNC_NAME(_cerror)
rts
FUNC_END(close)
FUNC_START(brk)
SYSCALL(17)
bcs FUNC_NAME(_cerror)
rts
FUNC_END(brk)
FUNC_START(lseek)
SYSCALL(199)
bcs FUNC_NAME(_cerror)
rts
FUNC_END(lseek)
FUNC_START(fstat)
SYSCALL(28)
bcs FUNC_NAME(_cerror)
rts
FUNC_END(lseek)
FUNC_START(isatty)
SYSCALL(29)
bcs FUNC_NAME(_cerror)
rts
FUNC_END(isatty)