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2002-11-12 Jeff Johnston <jjohnstn@redhat.com> 

*  mips/Makefile.in: Add cygmon support.
        *  mips/configure.in: Ditto.
        *  mips/configure: Regenerated.
        *  mips/crt0_cygmon.S: New file.
        *  mips/cygmon.c: Ditto.
        *  mips/pmon.S: Minor formatting and copyright changes.
        *  mips/crt0.S: Ditto.
This commit is contained in:
Jeff Johnston 2002-11-12 23:14:24 +00:00
parent 944772c70a
commit 2d210c7fd1
8 changed files with 306 additions and 30 deletions
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10
libgloss/ChangeLog
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@ -1,3 +1,13 @@
2002-11-12 Jeff Johnston <jjohnstn@redhat.com>
* mips/Makefile.in: Add cygmon support.
* mips/configure.in: Ditto.
* mips/configure: Regenerated.
* mips/crt0_cygmon.S: New file.
* mips/cygmon.c: Ditto.
* mips/pmon.S: Minor formatting and copyright changes.
* mips/crt0.S: Ditto.
2002-11-08 Jeff Johnston <jjohnstn@redhat.com>
* arm/Makefile.in: Add support for new pid specs.

19
libgloss/mips/Makefile.in
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@ -1,4 +1,4 @@
# Copyright (c) 1995, 1996, 1997, 1998, 1999 Cygnus Support
# Copyright (c) 1995, 1996, 1997, 1998, 1999, 2000 Cygnus Support
#
# The authors hereby grant permission to use, copy, modify, distribute,
# and license this software and its documentation for any purpose, provided
@ -75,6 +75,7 @@ DVEOBJS = dvemon.o @part_specific_obj@ ${GENOBJS} ${GENOBJS2}
JMR3904OBJS = jmr3904-io.o @part_specific_obj@ ${GENOBJS} ${GENOBJS2}
CFEOBJS = cfe.o cfe_api.o cfe_prestart.o \
@part_specific_obj@ ${GENOBJS} ${GENOBJS2}
CYGMONOBJS = open.o close.o cygmon.o @part_specific_obj@ ${GENOBJS}
# Nullmon cannot support read and write, but the test cases pull them in via libs
NULLMONOBJS = nullmon.o @part_specific_obj@ ${GENOBJS}
@ -131,6 +132,11 @@ libjmr3904.a: $(JMR3904OBJS)
${AR} ${ARFLAGS} $@ $(JMR3904OBJS)
${RANLIB} $@
libcygmon.a: $(CYGMONOBJS)
${AR} ${ARFLAGS} $@ $(CYGMONOBJS)
${RANLIB} $@
libcfe.a: $(CFEOBJS)
${AR} ${ARFLAGS} $@ $(CFEOBJS)
${RANLIB} $@
@ -196,14 +202,8 @@ distclean maintainer-clean realclean: clean
.PHONY: install info install-info clean-info
install:
if test "x$(CRT0)" != x ; then \
$(INSTALL_PROGRAM) $(CRT0) $(tooldir)/lib${MULTISUBDIR}/$(CRT0) ; \
fi
if test "x$(PCRT0)" != x ; then \
$(INSTALL_PROGRAM) $(PCRT0) $(tooldir)/lib${MULTISUBDIR}/$(PCRT0) ; \
fi
@for bsp in ${BSP}; do\
$(INSTALL_PROGRAM) $${bsp} $(tooldir)/lib${MULTISUBDIR}; \
@for file in $(CRT0) $(PCRT0) $(BSP); do \
$(INSTALL_DATA) $${file} $(tooldir)/lib${MULTISUBDIR}; \
done
@for script in ${SCRIPTS}; do\
$(INSTALL_DATA) ${srcdir}/$${script}.ld $(tooldir)/lib${MULTISUBDIR}/$${script}.ld; \
@ -219,6 +219,7 @@ test.o: ${srcdir}/test.c
crt0.o: ${srcdir}/crt0.S
pcrt0.o: ${srcdir}/crt0.S
$(CC) -c $(CFLAGS_FOR_TARGET) $(CFLAGS) -DGCRT0 ${srcdir}/crt0.S -o ${PCRT0}
crt0_cygmon.o: ${srcdir}/crt0_cygmon.S
idtmon.o: ${srcdir}/idtmon.S
pmon.o: ${srcdir}/pmon.S
$(CC) -c $(CFLAGS_FOR_TARGET) $(CFLAGS) $(PART_SPECIFIC_DEFINES) ${srcdir}/pmon.S -o pmon.o

14
libgloss/mips/configure vendored
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@ -928,6 +928,14 @@ case "${target}" in
script_list="dve idt jmr3904app jmr3904dram jmr3904dram-java jmr3904app-java"
bsp_list="libdve.a libidt.a libjmr3904.a"
;;
mipsisa32-*-*)
crt0="crt0_cygmon.o crt0.o"
pcrt0="pcrt0.o"
part_specific_obj=
part_specific_defines=
script_list="idt32 idt64 cfe"
bsp_list="libcygmon.a libidt.a libcfe.a"
;;
mips*-lsi*-*)
part_specific_obj=entry.o
part_specific_defines=
@ -940,12 +948,6 @@ case "${target}" in
script_list="idt pmon ddb ddb-kseg0 lsi idtecoff nullmon"
bsp_list="libidt.a libpmon.a liblsi.a libnullmon.a"
;;
mipsisa32*-*-*)
part_specific_obj=
part_specific_defines=
script_list="idt32 idt64 cfe"
bsp_list="libidt.a libcfe.a"
;;
*)
part_specific_obj="vr4300.o cma101.o"
part_specific_defines=

16
libgloss/mips/configure.in
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@ -1,4 +1,4 @@
# Copyright (c) 1995, 1996, 1997, 1998, 1999 Cygnus Support
# Copyright (c) 1995, 1996, 1997, 1998, 1999, 2000, 2002 Cygnus Support
#
# The authors hereby grant permission to use, copy, modify, distribute,
# and license this software and its documentation for any purpose, provided
@ -92,6 +92,14 @@ case "${target}" in
script_list="dve idt jmr3904app jmr3904dram jmr3904dram-java jmr3904app-java"
bsp_list="libdve.a libidt.a libjmr3904.a"
;;
mipsisa32-*-*)
crt0="crt0_cygmon.o crt0.o"
pcrt0="pcrt0.o"
part_specific_obj=
part_specific_defines=
script_list="idt32 idt64 cfe"
bsp_list="libcygmon.a libidt.a libcfe.a"
;;
mips*-lsi*-*)
part_specific_obj=entry.o
part_specific_defines=
@ -104,12 +112,6 @@ case "${target}" in
script_list="idt pmon ddb ddb-kseg0 lsi idtecoff nullmon"
bsp_list="libidt.a libpmon.a liblsi.a libnullmon.a"
;;
mipsisa32*-*-*)
part_specific_obj=
part_specific_defines=
script_list="idt32 idt64 cfe"
bsp_list="libidt.a libcfe.a"
;;
*)
part_specific_obj="vr4300.o cma101.o"
part_specific_defines=

3
libgloss/mips/crt0.S
View File

@ -209,6 +209,7 @@ init:
nop
#endif
jal _init # run global constructors
nop
@ -222,6 +223,7 @@ init:
move a0,v0 # pass through the exit code
.end init
/* Assume the PICBASE set up above is no longer valid below here. */
#ifdef __mips_embedded_pic
#undef PICBASE
@ -263,7 +265,6 @@ _exit:
# break instruction can cope with 0xfffff, but GAS limits the range:
break 1023
nop
b 7b # but loop back just in-case
nop
.end _exit

173
libgloss/mips/crt0_cygmon.S Normal file
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@ -0,0 +1,173 @@
/*
* crt0_cygmon.S -- Minimal startup file for MIPS targets running Cygmon.
*
* Copyright (c) 1995, 1996, 1997, 2000 Red Hat, Inc.
*
* 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.
*/
/*
* This file contains the minimal startup code necessary.
* This will not do any hardware initialization. It is assumed that we are talking to Cygmon
* and therefore the hardware will be initialized properly.
*/
#ifdef __mips16
/* This file contains 32 bit assembly code. */
.set nomips16
#endif
#include "regs.S"
/*
* Set up some room for a stack. We just grab a chunk of memory.
*/
#define STACK_SIZE 0x4000
#define GLOBAL_SIZE 0x2000
#define STARTUP_STACK_SIZE 0x0100
.comm __memsize, 12
.comm __lstack, STARTUP_STACK_SIZE
.comm __stackbase,4
.text
.align 4
/*
* Without the following nop, GDB thinks _start is a data variable.
* This is probably a bug in GDB in handling a symbol that is at the
* start of the .text section.
*/
nop
.globl _start
.ent _start
_start:
.set noreorder
la gp, _gp # set the global data pointer, defined in the linker script
.end _start
/*
* zero out the bss section.
*/
.globl __memsize
.globl get_mem_info .text
.globl zerobss
.ent zerobss
zerobss:
la v0, _fbss # These variables are defined in the linker script
la v1, _end
3:
sw zero, 0(v0)
bltu v0, v1, 3b
addiu v0, v0, 4 # executed in delay slot
/*
* Setup a small stack so we can run some C code,
* and get the usable memory size.
*/
la t0, __lstack
addiu sp, t0, STARTUP_STACK_SIZE
la a0, __memsize
jal get_mem_info
nop
/*
* Setup the stack pointer --
* get_mem_info returns the top of memory, so just use that In
* addition, we must subtract 24 bytes for the 3 8 byte
* arguments to main, in case main wants to write them back to
* the stack. The caller is supposed to allocate stack space
* for parameters in registers in the old MIPS ABIs. We must
* do this even though we aren't passing arguments, because
* main might be declared to have them.
* Some ports need a larger alignment for the stack, so we
* subtract 32, which satisifes the stack for the arguments and
* keeps the stack pointer better aligned.
*/
subu v0, v0, 32
move sp, v0
sw sp, __stackbase # keep this for future ref
.end zerobss
/*
* initialize target specific stuff. Only execute these
* functions it they exist.
*/
.globl hardware_init_hook .text
.globl software_init_hook .text
.globl __do_global_dtors .text
.globl atexit .text
.globl exit .text
.globl init
.ent init
init:
la t9, hardware_init_hook # init the hardware if needed
beq t9, zero, 6f
nop
jal t9
nop
6:
la t9, software_init_hook # init the software if needed
beq t9, zero, 7f
nop
jal t9
nop
7:
la a0, __do_global_dtors
jal atexit
nop
#ifdef GCRT0
.globl _ftext
.globl _extext
la a0, _ftext
la a1, _etext
jal monstartup
nop
#endif
move a0,zero # set argc to 0
jal main # call the program start function
nop
# fall through to the "exit" routine
jal exit # call libc exit to run the G++
# destructors
move a0, v0 # pass through the exit code
.end init
/*
* _exit -- Exit from the application. Normally we cause a user trap
* to return to the ROM monitor for another run. NOTE: This is
* the only other routine we provide in the crt0.o object, since
* it may be tied to the "_start" routine. It also allows
* executables that contain a complete world to be linked with
* just the crt0.o object.
*/
.globl _exit
.ent _exit
_exit:
7:
#ifdef GCRT0
jal _mcleanup
nop
#endif
# Cygmon expects a break 5
break 5
nop
b 7b # loop back just in-case
nop
.end _exit
/* EOF crt0.S */

87
libgloss/mips/cygmon.c Normal file
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@ -0,0 +1,87 @@
/* cygmon.c -- Glue code for linking apps to run on top of Cygmon.
*
* Copyright (c) 1998, 1999, 2000 Red Hat, Inc.
*
* 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 "syscall.h"
int
write ( int file,
char *buf,
int nbytes)
{
return sysCall(SYS_write, file, (unsigned long)buf, nbytes);
}
int
read (int file,
char *buf,
int nbytes)
{
return sysCall(SYS_read, file, (unsigned long)buf, nbytes);
}
int
outbyte (unsigned char c)
{
return sysCall(SYS_write, 0, (unsigned long)&c, 1);
}
unsigned char
inbyte (void)
{
char c;
sysCall(SYS_read, 0, (unsigned long)&c, 1);
return c;
}
/* Structure filled in by get_mem_info. Only the size field is
actually used (by sbrk), so the others aren't even filled in. */
struct s_mem
{
unsigned int size;
unsigned int icsize;
unsigned int dcsize;
};
// Perform a system call.
// Unused parameters should be set to 0.
int sysCall(unsigned long func, unsigned long p1, unsigned long p2, unsigned long p3)
{
int ret = 0;
asm volatile ( "
move $4, %1
move $5, %2
move $6, %3
move $7, %4
syscall
nop
move %0, $2" : "=r"(ret) : "r"(func), "r"(p1), "r"(p2), "r"(p3));
return ret;
}
// These need to be kept in sync with the definitions in Cygmon.
#define SYS_meminfo 1001
void *
get_mem_info (mem)
struct s_mem *mem;
{
unsigned long totmem = 0, topmem = 0;
int numbanks;
numbanks = sysCall(SYS_meminfo, (unsigned long)&totmem, (unsigned long)&topmem, 0);
mem->size = totmem;
return (void*)topmem;
}

2
libgloss/mips/pmon.S
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@ -1,7 +1,7 @@
/*
* pmon.S -- low-level entry points into PMON monitor.
*
* Copyright (c) 1996, 1997 Cygnus Support
* Copyright (c) 1996, 1997, 2002 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided