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mep: C5 support II


No response to my last post, had some more changes to add to it.
Ok to commit?

http://sources.redhat.com/ml/newlib/2009/msg00439.html

	* mep/Makefile.in (SCRIPTS): Update to new config.
	* mep/default.ld: New.
	* mep/gmap_default.ld: Change default endian to little.
	* mep/sim-crt0.S: Maintain 8-byte stack alignment.
	* mep/sim-crtn.S: Likewise.

Index: mep/Makefile.in
===================================================================
RCS file: /cvs/src/src/libgloss/mep/Makefile.in,v
retrieving revision 1.1
diff -p -U3 -r1.1  mep/Makefile.in
--- mep/Makefile.in	8 Feb 2007 21:22:05 -0000	1.1
+++ mep/Makefile.in	21 Apr 2009 03:50:44 -0000
@@ -57,7 +57,7 @@ OBJCOPY = `if [ -f ${objroot}/../binutil
 	then echo ${objroot}/../binutils/objcopy ; \
 	else t='$(program_transform_name)'; echo objcopy | sed -e $$t ; fi`
 
-SCRIPTS = min.ld simple.ld fmax.ld
+SCRIPTS = min.ld default.ld
 CRT = crt0.o sdram-crt0.o sim-crt0.o simnovec-crt0.o simsdram-crt0.o crtn.o sim-crtn.o
 SIM_BSP = libsim.a
 LIBNOSYS = ../libnosys/libnosys.a
Index: mep/default.ld
===================================================================
RCS file: mep/default.ld
diff -N  mep/default.ld
--- mep/default.ld	1 Jan 1970 00:00:00 -0000
+++ mep/default.ld	21 Apr 2009 03:50:44 -0000
@@ -0,0 +1,332 @@
+/******************************************************************************
+begin-header
+
+  DO NOT EDIT. THIS FILE IS MACHINE-GENERATED 
+  FROM THE TEMPLATE FILE gmap_default.ld.
+  ALL EDITS WILL BE ERASED WITH NEXT MeP-Integrator RUN. 
+
+  Custom linker script for the MeP Module default.
+end-header
+*******************************************************************************/
+
+OUTPUT_FORMAT("elf32-mep-little", "elf32-mep",
+	      "elf32-mep-little")
+OUTPUT_ARCH(mep)
+ENTRY(_reset)
+
+MEMORY
+{
+/* begin-memory */
+  VEC	(r) : ORIGIN = 0x00000000, LENGTH = 0x000000b8
+  VEC_WARM	(w) : ORIGIN = 0x00200000, LENGTH = 0x000000b8
+  HWINIT	(r) : ORIGIN = 0x000000b8, LENGTH = 0x00000148
+  RAM1	(r) : ORIGIN = 0x00000200, LENGTH = 0x001ffe00
+  RAM2	(w) : ORIGIN = 0x00800000, LENGTH = 0x00800000
+/*RAM3	(w) : ORIGIN = 0x80000000, LENGTH = 0x00800000 */
+  IMEM0	(w) : ORIGIN = 0x002000b8, LENGTH = 0x00003f48
+  IMEM1	(w) : ORIGIN = 0x00204000, LENGTH = 0x00004000
+  DMEM0	(w) : ORIGIN = 0x00220000, LENGTH = 0x00008000
+  DMEM1	(w) : ORIGIN = 0x00228000, LENGTH = 0x00008000
+  DMEM2	(w) : ORIGIN = 0x00230000, LENGTH = 0x00008000
+  DMEM3	(w) : ORIGIN = 0x00238000, LENGTH = 0x00008000
+/* end-memory */
+}
+
+SECTIONS
+{
+  /* Sections to be placed in the vec area.  */
+  .vec : { *(.vec) } >VEC /* VEC-section */
+
+  /* Sections to be placed in the HWINIT area.  */
+  .hwinit : { *(.hwinit) } >HWINIT /* HWINIT-section */
+
+  /* Sections to be placed in the ROM area.  */
+  .gnu.version   : { *(.gnu.version)	} >RAM1 /* ROM-section */
+  .gnu.version_d : { *(.gnu.version_d)	} >RAM1 /* ROM-section */
+  .gnu.version_r : { *(.gnu.version_r)	} >RAM1 /* ROM-section */
+
+  /* Sections to be placed in the romdata.s area.  */
+  .srodata :
+  {
+    __sdabase = . + 0x8000;
+    *(.srodata) *(.srodata.*) *(.gnu.linkonce.srd.*)
+  } >RAM2 /* DATA-section */
+
+  /* Sections to be placed in the data.s area.  */
+  .sdata     : 
+  {
+    *(.sdata) 
+    *(.sdata.*)
+    *(.gnu.linkonce.s.*)
+  } >RAM2 /* DATA-section */
+  .sbss      :
+  {
+    PROVIDE (__sbss_start = .);
+    PROVIDE (___sbss_start = .);
+    *(.dynsbss)
+    *(.sbss)
+    *(.sbss.*)
+    *(.gnu.linkonce.sb.*)
+    *(.scommon)
+    PROVIDE (__sbss_end = .);
+    PROVIDE (___sbss_end = .);
+    /* Assert maximum size */
+    __assert_tiny_size = ASSERT ((. < __sdabase) || ((. - __sdabase) <= 0x8000),
+	 		         "tiny section overflow");
+  } >RAM2 /* DATA-section */
+
+  /* Sections to be placed in the data.m area.  */
+  .data    :
+  {
+    __data_start = . ;
+    *(.data)
+    *(.data.*)
+    *(.gnu.linkonce.d.*)
+    SORT(CONSTRUCTORS)
+  } >RAM2 /* DATA-section */
+  .data1   : { *(.data1) } >RAM2 /* DATA-section */
+  .eh_frame : { KEEP (*(.eh_frame))} >RAM2 /* DATA-section */
+  .gcc_except_table : { *(.gcc_except_table) *(.gcc_except_table.*) } >RAM2 /* DATA-section */
+  .dynamic       : { *(.dynamic) } >RAM2 /* DATA-section */
+  .ctors   : 
+  {
+    /* gcc uses crtbegin.o to find the start of
+       the constructors, so we make sure it is
+       first.  Because this is a wildcard, it
+       doesn't matter if the user does not
+       actually link against crtbegin.o; the
+       linker won't look for a file to match a
+       wildcard.  The wildcard also means that it
+       doesn't matter which directory crtbegin.o
+       is in.  */
+    KEEP (*crtbegin.o(.ctors))
+    /* We don't want to include the .ctor section from
+       from the crtend.o file until after the sorted ctors.
+       The .ctor section from the crtend file contains the
+       end of ctors marker and it must be last */
+    KEEP (*(EXCLUDE_FILE (*crtend.o ) .ctors))
+    KEEP (*(SORT(.ctors.*)))
+    KEEP (*(.ctors))
+  } >RAM2 /* DATA-section */
+  .dtors         :
+  {
+    KEEP (*crtbegin.o(.dtors))
+    KEEP (*(EXCLUDE_FILE (*crtend.o ) .dtors))
+    KEEP (*(SORT(.dtors.*)))
+    KEEP (*(.dtors))
+  } >RAM2 /* DATA-section */
+  .jcr :
+  {
+    . = ALIGN(4);
+    *(.jcr)
+  } >RAM2 /* DATA-section */
+  .got :
+  {
+    *(.got.plt) *(.got)
+    _edata = .;
+    PROVIDE (edata = .);
+  } >RAM2 /* DATA-section */
+  .based :
+  {
+    __tpbase = .;
+    *(.based) *(.based.*) *(.gnu.linkonce.based.*)
+    /* Assert maximum size */
+    __assert_based_size = ASSERT ((. - __tpbase) <= 0x80,
+	                          "based section overflow");
+  } >RAM2 /* DATA-section */
+
+  .bss       :
+  {
+    __bss_start = .;
+    *(.dynbss)
+    *(.bss)
+    *(.bss.*)
+    *(.gnu.linkonce.b.*)
+    *(COMMON)
+    /* Align here to ensure that the .bss section occupies space up to
+      _end.  Align after .bss to ensure correct alignment even if the
+      .bss section disappears because there are no input sections.  */
+    . = ALIGN(32 / 8);
+    _end = .;
+    PROVIDE (end = .);
+  } >RAM2 /* DATA-section */
+
+  /* Sections to be placed in the code.m area.  */
+  .init          : 
+  { 
+    KEEP (*(.init))
+  } >RAM2 /* CODE-section */
+  .plt      : { *(.plt)	} >RAM2 /* DATA-section */
+  .text      :
+  {
+    *(.text)
+    *(.text.*)
+    *(.stub)
+    /* .gnu.warning sections are handled specially by elf32.em.  */
+    *(.gnu.warning)
+    *(.gnu.linkonce.t.*)
+  } >RAM2 /* CODE-section */ =0
+  .vtext ALIGN(8)    :
+  {
+    *(.vtext)
+  } >RAM2 /* CODE-section */
+  .fini      :
+  {
+    KEEP (*(.fini))
+    PROVIDE (__etext = .);
+    PROVIDE (_etext = .);
+    PROVIDE (etext = .);
+  } >RAM2 /* CODE-section */ =0
+
+  /* Sections to be placed in the romdata.m area.  */
+  .rodata   : { *(.rodata) *(.rodata.*) *(.gnu.linkonce.r.*) } >RAM2 /* DATA-section */
+  .rodata1   : { *(.rodata1) } >RAM2 /* DATA-section */
+
+  /* Sections to be placed in the code.l area.  */
+  .ftext : {  *(.ftext) *(.ftext.*) *(.gnu.linkonce.ft.*) } >RAM2 /* CODE-section */
+  .vftext ALIGN(8)    :
+  { 
+    *(.vftext) *(.vftext.*) *(.gnu.linkonce.vf.*)
+  } >RAM2 /* CODE-section */
+
+  /* Sections to be placed in the romdata.l area.  */
+  .frodata :
+  {
+    *(.frodata) *(.frodata.*) *(.gnu.linkonce.frd.*)
+    __assert_near_size = ASSERT (. <= 0x1000000, "near section overflow");
+  } >RAM2 /* DATA-section */
+
+  /* Sections to be placed in the data.l area.  */
+  .far : { *(.far) *(.far.*) *(.gnu.linkonce.far.*) } >RAM2 /* DATA-section */
+  .farbss :
+  { PROVIDE (__farbss_start = .);
+    *(.farbss) *(.farbss.*)
+    PROVIDE (__farbss_end = .);
+  } >RAM2 /* DATA-section */
+
+  /* END-mep-sections */
+
+  .vec_warm :
+  {
+    /* vec_warm is a place for the startup code to write the interrupt
+       vectors.  Allow 0xb8 bytes of space aligned on a 4 byte boundary.  */
+    . = ALIGN(4);
+    vec_warm = .;
+    . += 0xb8;
+  } >VEC_WARM
+
+  /* begin-stack-table */
+  __stack50 = (__stack - (0 *  (__stack_size / 1)) + 15) / 16 * 16;
+
+  .rostacktab :
+  {
+    /* Emit a table describing the location of the different stacks.  */
+    . = ALIGN(4);
+    __stack_table = .;
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    LONG (__stack50);
+    __stack_end = .;
+  } >RAM2
+  /* end-stack-table */
+
+  /* begin-heap */
+  /* End of DATA is 0x00800000 + 0x00800000. That's where the heap will end.  */
+  __heap_end = 0x00800000 + 0x00800000 - 1;
+  /* end-heap */
+
+  /* Default stack size is 1M.  That's where the heap will start if there's
+     room.  If there's not enough room, allocate half of the remaining space
+     for stack and half for heap.  Align the heap on a 16 byte boundary.  */
+  __stack_size = (__stack_end + 0x100000 <= __heap_end + 1 
+	          ? 0x100000
+ 		  : ((__heap_end + 1 - __stack_end) / 2));
+  __heap = (__stack_end + __stack_size + 15) / 16 * 16;
+
+  /* Leave 16 bytes between the stack and the heap.  */
+  __stack = __heap - 0x10;
+
+  /* Stabs debugging sections.  */
+  .stab 0 : { *(.stab) }
+  .stabstr 0 : { *(.stabstr) }
+  .stab.excl 0 : { *(.stab.excl) }
+  .stab.exclstr 0 : { *(.stab.exclstr) }
+  .stab.index 0 : { *(.stab.index) }
+  .stab.indexstr 0 : { *(.stab.indexstr) }
+  .comment 0 : { *(.comment) }
+  /* DWARF debug sections.
+     Symbols in the DWARF debugging sections are relative to the beginning
+     of the section so we begin them at 0.  */
+  /* DWARF 1 */
+  .debug          0 : { *(.debug) }
+  .line           0 : { *(.line) }
+  /* GNU DWARF 1 extensions */
+  .debug_srcinfo  0 : { *(.debug_srcinfo) }
+  .debug_sfnames  0 : { *(.debug_sfnames) }
+  /* DWARF 1.1 and DWARF 2 */
+  .debug_aranges  0 : { *(.debug_aranges) }
+  .debug_pubnames 0 : { *(.debug_pubnames) }
+  /* DWARF 2 */
+  .debug_info     0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }
+  .debug_abbrev   0 : { *(.debug_abbrev) }
+  .debug_line     0 : { *(.debug_line) }
+  .debug_frame    0 : { *(.debug_frame) }
+  .debug_str      0 : { *(.debug_str) }
+  .debug_loc      0 : { *(.debug_loc) }
+  .debug_macinfo  0 : { *(.debug_macinfo) }
+  .debug_ranges   0 : { *(.debug_ranges) }
+  /* SGI/MIPS DWARF 2 extensions */
+  .debug_weaknames 0 : { *(.debug_weaknames) }
+  .debug_funcnames 0 : { *(.debug_funcnames) }
+  .debug_typenames 0 : { *(.debug_typenames) }
+  .debug_varnames  0 : { *(.debug_varnames) }
+  /* These must appear regardless of  .  */
+}
Index: mep/gmap_default.ld
===================================================================
RCS file: /cvs/src/src/libgloss/mep/gmap_default.ld,v
retrieving revision 1.2
diff -p -U3 -r1.2  mep/gmap_default.ld
--- mep/gmap_default.ld	13 Jul 2007 17:32:21 -0000	1.2
+++ mep/gmap_default.ld	21 Apr 2009 03:50:44 -0000
@@ -24,8 +24,8 @@ begin-header
 end-header
 *******************************************************************************/
 
-OUTPUT_FORMAT("elf32-mep", "elf32-mep",
-	      "elf32-mep")
+OUTPUT_FORMAT("elf32-mep-little", "elf32-mep",
+	      "elf32-mep-little")
 OUTPUT_ARCH(mep)
 ENTRY(_reset)
 
Index: mep/sim-crt0.S
===================================================================
RCS file: /cvs/src/src/libgloss/mep/sim-crt0.S,v
retrieving revision 1.1
diff -p -U3 -r1.1  mep/sim-crt0.S
--- mep/sim-crt0.S	8 Feb 2007 21:22:05 -0000	1.1
+++ mep/sim-crt0.S	21 Apr 2009 03:50:44 -0000
@@ -113,6 +113,17 @@ _start:
 	movh	$sp, %uhi(__stack_table)
 	or3	$sp, $sp, %lo(__stack_table)
 
+	# initialize sp, gp, tp
+	# get CPU ID
+	ldc	$0, $id
+	srl	$0, 16
+
+	# load ID-specific stack pointer	
+	sl2ad3	$0, $0, $sp              # $0 = ($0 << 2) + $sp
+	lw	$sp,($0)                 # $sp = *($0)
+	mov	$0,0xfff8
+	and	$sp, $0
+
 #ifndef NOVEC
 	# copy exception vector table
 
@@ -294,14 +305,6 @@ _start:
 .Lend_dc:	
 	# NOVEC	
 #endif
-	# initialize sp, gp, tp
-	# get CPU ID
-	ldc	$0, $id
-	srl	$0, 16
-
-	# load ID-specific stack pointer	
-	sl2ad3	$0, $0, $sp              # $0 = ($0 << 2) + $sp
-	lw	$sp,($0)                 # $sp = *($0)
 	mov	$0, 0
 	
 	movh	$gp, %uhi(__sdabase)
@@ -385,13 +388,13 @@ _exit_in_progress:	.word 0
 
 	.section	.init
 __invoke_init_section:
-	add	$sp, -4
+	add	$sp, -8
 	ldc	$0, $lp
 	sw	$0, ($sp)
 
 	.section .fini
 __invoke_fini_section:
-	add	$sp, -4
+	add	$sp, -8
 	ldc	$0, $lp
 	sw	$0, ($sp)
 
Index: mep/sim-crtn.S
===================================================================
RCS file: /cvs/src/src/libgloss/mep/sim-crtn.S,v
retrieving revision 1.1
diff -p -U3 -r1.1  mep/sim-crtn.S
--- mep/sim-crtn.S	8 Feb 2007 21:22:05 -0000	1.1
+++ mep/sim-crtn.S	21 Apr 2009 03:50:44 -0000
@@ -13,11 +13,11 @@
 	.section	.init
         lw      $1, ($sp)
         stc     $1, $lp
-        add     $sp, 4
+        add     $sp, 8
         ret
 
 	.section	.fini
         lw      $1, ($sp)
         stc     $1, $lp
-        add     $sp, 4
+        add     $sp, 8
         ret


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