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[m68k] linker scripts for cf bsps
- From: Nathan Sidwell <nathan at codesourcery dot com>
- To: Jeff Johnston <jjohnstn at redhat dot com>
- Cc: newlib at sourceware dot org
- Date: Tue, 21 Feb 2006 15:04:55 +0000
- Subject: [m68k] linker scripts for cf bsps
this patch adds libgloss support for five coldfire bsps -- m5208evb.ld,
m5213evb.ld, m5235evb.ld, m5272c3.ld, m5282evb.ld.
ok?
nathan
--
Nathan Sidwell :: http://www.codesourcery.com :: CodeSourcery
nathan@codesourcery.com :: http://www.planetfall.pwp.blueyonder.co.uk
2006-02-21 Nathan Sidwell <nathan@codesourcery.com>
* m68k/Makefile.in (DBUG_SCRIPTS): New.
(all): Add DEBUG_SCRIPTS.
(m5208evb.ld, m5213evb.ld, m5235evb.ld, m5272c3.ld,
m5282evb.ld): New targets
(install): Iterate over DBUG_SCRIPTS.
* m68k/crt0.S: Don't use dbra on any cf chips.
* m68k/dbug-cf.sc: New.
Index: m68k/Makefile.in
===================================================================
RCS file: /cvs/src/src/libgloss/m68k/Makefile.in,v
retrieving revision 1.4
diff -c -3 -p -r1.4 Makefile.in
*** m68k/Makefile.in 28 Jun 2004 22:42:20 -0000 1.4
--- m68k/Makefile.in 21 Feb 2006 14:57:02 -0000
*************** IDPGDB_OBJS= leds.o idp-inbyte.o idp-gdb
*** 122,127 ****
--- 122,128 ----
#
DBUG_BSP= libdbug.a
DBUG_OBJS= dbug-exit.o dbug-inbyte.o dbug-outbyte.o
+ DBUG_SCRIPTS= m5208evb.ld m5213evb.ld m5235evb.ld m5272c3.ld m5282evb.ld
# Host specific makefile fragment comes in here.
@host_makefile_frag@
*************** DBUG_OBJS= dbug-exit.o dbug-inbyte.o dbu
*** 130,136 ****
# 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: ${SIM_CRT0} ${SIM_BSP} ${CRT0} ${BCC_BSP} ${IDP_BSP} ${IDPGDB_BSP} ${MVME135_BSP} ${MVME162_BSP} ${DBUG_BSP}
#
# here's where we build the board support packages for each target
--- 131,137 ----
# 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: ${SIM_CRT0} ${SIM_BSP} ${CRT0} ${BCC_BSP} ${IDP_BSP} ${IDPGDB_BSP} ${MVME135_BSP} ${MVME162_BSP} ${DBUG_BSP} ${DBUG_SCRIPTS}
#
# here's where we build the board support packages for each target
*************** ${MVME162_BSP}: $(OBJS) ${MVME162_OBJS}
*** 163,168 ****
--- 164,184 ----
${AR} ${ARFLAGS} $@ $(OBJS) ${MVME162_OBJS}
${RANLIB} $@
+ m5208evb.ld: dbug-cf.sc Makefile
+ RAMSTART=1024M RAMSIZE=16M RAMDBUG=128K ${SHELL} $< > $@
+
+ m5213evb.ld: dbug-cf.sc Makefile
+ RAMSTART=512M RAMSIZE=32K RAMDBUG=8K ${SHELL} $< > $@
+
+ m5235evb.ld: dbug-cf.sc Makefile
+ RAMSTART=0M RAMSIZE=16M RAMDBUG=64K ${SHELL} $< > $@
+
+ m5272c3.ld: dbug-cf.sc Makefile
+ RAMSTART=0M RAMSIZE=4M RAMDBUG=128K ${SHELL} $< > $@
+
+ m5282evb.ld: dbug-cf.sc Makefile
+ RAMSTART=0M RAMSIZE=16M RAMDBUG=64K ${SHELL} $< > $@
+
leds.o: ${srcdir}/leds.c
$(CC) $(CFLAGS_FOR_TARGET) $(INCLUDES) -c $<
*************** install:
*** 283,288 ****
--- 299,307 ----
$(INSTALL_PROGRAM) $(DBUG_BSP) $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}/$(DBUG_BSP)
$(INSTALL_DATA) ${srcdir}/sbc5204.ld $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}/sbc5204.ld
$(INSTALL_DATA) ${srcdir}/sbc5206.ld $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}/sbc5206.ld
+ for script in $(DBUG_SCRIPTS) ; \
+ do $(INSTALL_DATA) $$script $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}/$$script ; \
+ done
# target specific makefile fragment comes in here.
@target_makefile_frag@
Index: m68k/crt0.S
===================================================================
RCS file: /cvs/src/src/libgloss/m68k/crt0.S,v
retrieving revision 1.2
diff -c -3 -p -r1.2 crt0.S
*** m68k/crt0.S 27 Oct 2003 20:03:10 -0000 1.2
--- m68k/crt0.S 21 Feb 2006 14:57:02 -0000
*************** SYM (start):
*** 84,90 ****
subql IMM(1), d0
2:
clrb (a0)+
! #if !defined(__mcoldfire__) && !defined(__mcf5200__)
dbra d0, 2b
clrw d0
subql IMM(1), d0
--- 84,90 ----
subql IMM(1), d0
2:
clrb (a0)+
! #if !defined(__mcoldfire__)
dbra d0, 2b
clrw d0
subql IMM(1), d0
Index: m68k/dbug-cf.sc
===================================================================
RCS file: m68k/dbug-cf.sc
diff -N m68k/dbug-cf.sc
*** /dev/null 1 Jan 1970 00:00:00 -0000
--- m68k/dbug-cf.sc 21 Feb 2006 14:57:02 -0000
***************
*** 0 ****
--- 1,112 ----
+ # a linker script template.
+ # RAMSTART - start of board's ram
+ # RAMSIZE - size of board's ram
+ # RAMDBUG - bytes at start of RAM for DBUG use
+
+ cat <<EOF
+ STARTUP(crt0.o)
+ OUTPUT_ARCH(m68k)
+ /* DBUG loads SREC files */
+ /*OUTPUT_FORMAT(srec)*/
+ ENTRY(start)
+ SEARCH_DIR(.)
+ GROUP(-ldbug -lc -lgcc -ldbug)
+ __DYNAMIC = 0;
+
+ MEMORY
+ {
+ ram (rwx) : ORIGIN = ${RAMSTART} + ${RAMDBUG:-0},
+ LENGTH = ${RAMSIZE} - ${RAMDBUG:-0}
+ }
+
+ PROVIDE (__stack = ${RAMSTART} + ${RAMSIZE});
+
+ /*
+ * Initalize some symbols to be zero so we can reference them in the
+ * crt0 without core dumping. These functions are all optional, but
+ * we do this so we can have our crt0 always use them if they exist.
+ * This is so BSPs work better when using the crt0 installed gcc.
+ * We have to initalize them twice, so we cover a.out (which prepends
+ * an underscore) and coff object file formats.
+ */
+ PROVIDE (hardware_init_hook = 0);
+ PROVIDE (_hardware_init_hook = 0);
+ PROVIDE (software_init_hook = 0);
+ PROVIDE (_software_init_hook = 0);
+ /*
+ * stick everything in ram (of course)
+ */
+ SECTIONS
+ {
+ .text :
+ {
+ CREATE_OBJECT_SYMBOLS
+ *(.text .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 .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 :
+ {
+ *(.got.plt) *(.got)
+ *(.shdata)
+ *(.data .data.*)
+ _edata = .;
+ } > ram
+
+ .bss :
+ {
+ . = ALIGN(0x4);
+ __bss_start = . ;
+ *(.shbss)
+ *(.bss .bss.*)
+ *(COMMON)
+ _end = ALIGN (0x8);
+ __end = _end;
+ } > ram
+
+ .stab 0 (NOLOAD) :
+ {
+ *(.stab)
+ }
+
+ .stabstr 0 (NOLOAD) :
+ {
+ *(.stabstr)
+ }
+ }
+ EOF