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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.

21
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} $@
@ -196,17 +202,11 @@ distclean maintainer-clean realclean: clean
.PHONY: install info install-info clean-info
install:
if test "x$(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; \
$(INSTALL_DATA) ${srcdir}/$${script}.ld $(tooldir)/lib${MULTISUBDIR}/$${script}.ld; \
done
info:
@ -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=

13
libgloss/mips/crt0.S
View File

@ -37,9 +37,9 @@
# else
# define LA(t,x) la t,x-PICBASE ; addu t,s0,t
# endif
#else /* __mips_embedded_pic */
#else /* __mips_embedded_pic */
# define LA(t,x) la t,x
#endif /* __mips_embedded_pic */
#endif /* __mips_embedded_pic */
.comm __memsize, 12
.comm __lstack, STARTUP_STACK_SIZE
@ -116,7 +116,7 @@ _start:
2:
/* Fix high bits, if any, of the PC so that exception handling
/* Fix high bits, if any, of the PC so that exception handling
doesn't get confused. */
LA (v0, 3f)
jr v0
@ -161,7 +161,7 @@ zerobss:
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.
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
@ -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
@ -263,11 +265,10 @@ _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
/* Assume the PICBASE set up above is no longer valid below here. */
#ifdef __mips_embedded_pic
#undef PICBASE

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