bsps: Move startup files to bsps

Adjust build support files to new directory layout.

This patch is a part of the BSP source reorganization.

Update #3285.

9 files changed, 897 insertions, 0 deletions

diff --git a/bsps/i386/pc386/start/bsp_fatal_halt.c b/bsps/i386/pc386/start/bsp_fatal_halt.c
new file mode 100644
index 0000000000..07bbd793e0
--- /dev/null
+++ b/bsps/i386/pc386/start/bsp_fatal_halt.c
@@ -0,0 +1,24 @@
+/**
+ *  COPYRIGHT (c) 2016.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <bsp.h>
+
+void _CPU_Fatal_halt(uint32_t source, uint32_t error)
+{
+  __asm__ volatile (
+         "cli\n\t"
+	 "movl %0,%%eax\n\t"
+	 "hlt\n\t"
+         : "=r" ((error))
+         : "0" ((error))
+  );
+  #ifdef __GNUC__
+    __builtin_unreachable();
+  #endif
+}
diff --git a/bsps/i386/pc386/start/bsp_specs b/bsps/i386/pc386/start/bsp_specs
new file mode 100644
index 0000000000..87638cc027
--- /dev/null
+++ b/bsps/i386/pc386/start/bsp_specs
@@ -0,0 +1,9 @@
+%rename endfile old_endfile
+%rename startfile old_startfile
+
+*startfile:
+%{!qrtems: %(old_startfile)} \
+%{!nostdlib: %{qrtems: crti.o%s crtbegin.o%s}}
+
+*endfile:
+%{!qrtems: %(old_endfile)} %{qrtems: crtend.o%s crtn.o%s}
diff --git a/bsps/i386/pc386/start/bspcmdline.c b/bsps/i386/pc386/start/bspcmdline.c
new file mode 100644
index 0000000000..d617863198
--- /dev/null
+++ b/bsps/i386/pc386/start/bspcmdline.c
@@ -0,0 +1,60 @@
+/*-------------------------------------------------------------------------+
+| This file contains the PC386 BSP startup package. It includes application,
+| board, and monitor specific initialization and configuration. The generic CPU
+| dependent initialization has been performed before this routine is invoked.
++--------------------------------------------------------------------------+
+| (C) Copyright 2009 RTEMS Project
+|     Chris Johns (chrisj@rtems.org)
++--------------------------------------------------------------------------+
+| Disclaimer:
+|
+| This file is provided "AS IS" without warranty of any kind, either
+| expressed or implied.
++--------------------------------------------------------------------------+
+| This code is based on:
+|   common sense
+| With the following copyright notice:
+| **************************************************************************
+| *  COPYRIGHT (c) 1989-2008.
+| *  On-Line Applications Research Corporation (OAR).
+| *
+| *  The license and distribution terms for this file may be
+| *  found in the file LICENSE in this distribution or at
+| *  http://www.rtems.org/license/LICENSE.
+| **************************************************************************
++--------------------------------------------------------------------------*/
+
+#include <bsp.h>
+#include <rtems/pci.h>
+#include <libcpu/cpuModel.h>
+
+/*
+ *  External data
+ */
+extern uint32_t _boot_multiboot_flags;
+extern uint32_t _boot_multiboot_memory[2];
+extern const char _boot_multiboot_cmdline[256];
+
+/*-------------------------------------------------------------------------+
+|         Function: bsp_cmdline
+|      Description: Call when you want the command line.
+| Global Variables: The multiboot values copied from the loader.
+|        Arguments: None.
+|          Returns: The whole command line.
++--------------------------------------------------------------------------*/
+const char* bsp_cmdline( void )
+{
+  return _boot_multiboot_cmdline;
+}
+
+/*-------------------------------------------------------------------------+
+|         Function: bsp_cmdline_arg
+|      Description: Call to search for an argument.
+| Global Variables: The multiboot values copied from the loader.
+|        Arguments: The option start.
+|          Returns: The option if found or nothing.
++--------------------------------------------------------------------------*/
+const char* bsp_cmdline_arg( const char* arg )
+{
+  return strstr (bsp_cmdline (), arg);
+}
diff --git a/bsps/i386/pc386/start/bspgetworkarea.c b/bsps/i386/pc386/start/bspgetworkarea.c
new file mode 100644
index 0000000000..21cb472607
--- /dev/null
+++ b/bsps/i386/pc386/start/bspgetworkarea.c
@@ -0,0 +1,135 @@
+/*
+ *  This routine is an implementation of the bsp_work_area_initialize()
+ *  that can be used by all m68k BSPs following linkcmds conventions
+ *  regarding heap, stack, and workspace allocation.
+ *
+ *  COPYRIGHT (c) 1989-2008.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+/* #define BSP_GET_WORK_AREA_DEBUG */
+#include <bsp.h>
+#include <bsp/bootcard.h>
+
+#ifdef BSP_GET_WORK_AREA_DEBUG
+  #include <rtems/bspIo.h>
+#endif
+
+/*
+ *  These are provided by the linkcmds.
+ */
+extern char   WorkAreaBase[];
+extern char   HeapSize[];
+extern char   RamSize[];
+
+/* rudimentary multiboot info */
+struct multiboot_info {
+  uint32_t  flags;       /* start.S only raises flags for items actually */
+                         /* saved; this allows us to check for the size  */
+                         /* of the data structure.                       */
+  uint32_t  mem_lower;  /* avail kB in lower memory */
+  uint32_t  mem_upper;  /* avail kB in lower memory */
+  /* ... (unimplemented) */
+};
+
+extern struct multiboot_info _boot_multiboot_info;
+
+/*
+ *  This is the first address of the memory we can use for the RTEMS
+ *  Work Area.
+ */ 
+static uintptr_t rtemsWorkAreaStart;
+
+/*
+ * Board's memory size easily be overridden by application.
+ */
+uint32_t bsp_mem_size = 0;
+
+/* Size of stack used during initialization. Defined in 'start.s'.  */
+extern uint32_t _stack_size;
+
+static void bsp_size_memory(void)
+{
+  uintptr_t topAddr;
+
+  /* Set the value of start of free memory. */
+  rtemsWorkAreaStart = (uint32_t)WorkAreaBase + _stack_size;
+
+  /* Align the RTEMS Work Area at beginning of free memory. */
+  if (rtemsWorkAreaStart & (CPU_ALIGNMENT - 1))  /* not aligned => align it */
+    rtemsWorkAreaStart = (rtemsWorkAreaStart+CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
+
+  /* The memory detection algorithm is very crude; try
+   * to use multiboot info, if possible (set from start.S)
+   */
+  if ( ((uintptr_t)RamSize == (uintptr_t) 0xFFFFFFFF)  &&
+       (_boot_multiboot_info.flags & 1) &&
+       _boot_multiboot_info.mem_upper ) {
+    topAddr = _boot_multiboot_info.mem_upper * 1024;
+    #ifdef BSP_GET_WORK_AREA_DEBUG
+      printk( "Multiboot info says we have 0x%08x\n", topAddr );
+    #endif
+  } else if ( (uintptr_t) RamSize == (uintptr_t) 0xFFFFFFFF ) {
+    uintptr_t lowest;
+    uint32_t  val;
+    int       i;
+
+    /*
+     * We have to dynamically size memory. Memory size can be anything
+     * between no less than 2M and 2048M.  If we can write a value to
+     * an address and read the same value back, then the memory is there.
+     *
+     * WARNING: This can detect memory which should be reserved for
+     *          graphics controllers which share the CPU's RAM.
+     */
+
+    /* find the lowest 1M boundary to probe */
+    lowest = ((rtemsWorkAreaStart + (1<<20)) >> 20) + 1;
+    if ( lowest  < 2 )
+      lowest = 2;
+
+    for (i=2048; i>=lowest; i--) {
+      topAddr = i*1024*1024 - 4;
+      *(volatile uint32_t*)topAddr = topAddr;
+    }
+
+    for(i=lowest; i<=2048; i++) {
+      topAddr = i*1024*1024 - 4;
+      val =  *(volatile uint32_t*)topAddr;
+      if (val != topAddr) {
+        break;
+      }
+    }
+
+    topAddr = (i-1)*1024*1024;
+    #ifdef BSP_GET_WORK_AREA_DEBUG
+      printk( "Dynamically sized to 0x%08x\n", topAddr );
+    #endif
+  } else {
+    topAddr = (uintptr_t) RamSize;
+    #ifdef BSP_GET_WORK_AREA_DEBUG
+      printk( "hardcoded to 0x%08x\n", topAddr );
+    #endif
+  }
+
+  bsp_mem_size = topAddr;
+}
+
+void bsp_work_area_initialize(void)
+{
+  void *area_start;
+  uintptr_t area_size;
+
+  /*
+   *  We need to determine how much memory there is in the system.
+   */
+  bsp_size_memory();
+
+  area_start = (void *) rtemsWorkAreaStart;
+  area_size  = (uintptr_t) bsp_mem_size - (uintptr_t) rtemsWorkAreaStart;
+  bsp_work_area_initialize_default( area_start, area_size );
+}
diff --git a/bsps/i386/pc386/start/bspidle.S b/bsps/i386/pc386/start/bspidle.S
new file mode 100644
index 0000000000..740671afc1
--- /dev/null
+++ b/bsps/i386/pc386/start/bspidle.S
@@ -0,0 +1,19 @@
+/*
+ * Idle Thread Body
+ *
+ * COPYRIGHT (c) 2016.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <rtems/asm.h>
+
+.p2align 4
+
+PUBLIC(bsp_idle_thread)
+SYM(bsp_idle_thread):
+hltloop: hlt
+  jmp hltloop
diff --git a/bsps/i386/pc386/start/bspreset.c b/bsps/i386/pc386/start/bspreset.c
new file mode 100644
index 0000000000..0fbcd0f201
--- /dev/null
+++ b/bsps/i386/pc386/start/bspreset.c
@@ -0,0 +1,18 @@
+/*
+ *  COPYRIGHT (c) 1989-2017.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <rtems.h>
+#include <bsp.h>
+#include <bsp/bootcard.h>
+
+void bsp_reset(void)
+{
+  /* shutdown and reboot */
+  outport_byte(0x64, 0xFE);        /* use keyboard controller */
+}
diff --git a/bsps/i386/pc386/start/bspstart.c b/bsps/i386/pc386/start/bspstart.c
new file mode 100644
index 0000000000..db1ca90cf4
--- /dev/null
+++ b/bsps/i386/pc386/start/bspstart.c
@@ -0,0 +1,141 @@
+/**
+ * @file
+ *
+ * This file contains the PC386 BSP startup package. It includes application,
+ * board, and monitor specific initialization and configuration.
+ */
+
+/*
+ * This file was initially written by Joel Sherrill as part of the go32 BSP.
+ * It was subsequently adapted as part of the pc386 BSP by developers from
+ * the NavIST Group in 1997.
+ *
+ * Copyright (c) 2016.
+ * Chris Johns <chrisj@rtems.org>
+ *
+ * COPYRIGHT (c) 1989-2008, 2016.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ *
+ * (C) Copyright 1997 -
+ * - NavIST Group - Real-Time Distributed Systems and Industrial Automation
+ * Instituto Superior Tecnico * Lisboa * PORTUGAL (http://pandora.ist.utl.pt)
+ *
+ * NavISY Disclaimer:
+ * This file is provided "AS IS" without warranty of any kind, either
+ * expressed or implied.
+ */
+
+#include <bsp.h>
+#include <bsp/bspimpl.h>
+#include <bsp/irq.h>
+#include <rtems/pci.h>
+#include <libcpu/cpuModel.h>
+
+/*
+ * PCI Bus Configuration
+ */
+rtems_pci_config_t BSP_pci_configuration = {
+  (volatile unsigned char*)0,
+  (volatile unsigned char*)0,
+  NULL
+};
+
+/*
+ * Helper to initialize the PCI Bus
+ */
+static void bsp_pci_initialize_helper(void)
+{
+  const pci_config_access_functions *pci_accessors;
+
+  pci_accessors = pci_bios_initialize();
+  if (pci_accessors != NULL) {
+    printk("PCI bus: using PCI BIOS interface\n");
+    BSP_pci_configuration.pci_functions = pci_accessors;
+    return;
+  }
+
+  pci_accessors = pci_io_initialize();
+  if (pci_accessors != NULL) {
+    printk("PCI bus: using PCI I/O interface\n");
+    BSP_pci_configuration.pci_functions = pci_accessors;
+    return;
+  }
+
+  printk("PCI bus: could not initialize PCI BIOS interface\n");
+}
+
+/*-------------------------------------------------------------------------+
+|         Function: bsp_start
+|      Description: Called before main is invoked.
+| Global Variables: None.
+|        Arguments: None.
+|          Returns: Nothing.
++--------------------------------------------------------------------------*/
+static void bsp_start_default( void )
+{
+  /*
+   * Turn off watchdog
+   */
+  /*
+   * Calibrate variable for 1ms-loop (see timer.c)
+   */
+  Calibrate_loop_1ms();
+
+  /*
+   * Init rtems interrupt management
+   */
+  rtems_irq_mngt_init();
+
+  /*
+   * Init rtems exceptions management
+   */
+  rtems_exception_init_mngt();
+
+  /*
+   * init PCI Bios interface...
+   */
+  bsp_pci_initialize_helper();
+
+  /*
+   * Probe for legacy UARTs.
+   */
+  legacy_uart_probe();
+
+  /*
+   * Probe for UARTs on PCI.
+   */
+  pci_uart_probe();
+
+  /*
+   * Parse the GDB arguments and flag a serial port as not valid. This stops
+   * the console from claming the port.
+   */
+#if BSP_GDB_STUB
+  pc386_parse_gdb_arguments();
+#endif
+
+  /*
+   * Figure out where printk() and console IO is to be directed.  Do this after
+   * the legacy and PCI bus probes so we have a chance for those devices to be
+   * added to the set in the console driver.  In general, do it as early as
+   * possible so printk() has a chance to work early on devices found via PCI
+   * probe.
+   */
+  pc386_parse_console_arguments();
+
+  Clock_driver_install_handler();
+
+#if BSP_ENABLE_IDE
+  bsp_ide_cmdline_init();
+#endif
+} /* bsp_start_default */
+
+/*
+ *  By making this a weak alias for bsp_start_default, a brave soul
+ *  can override the actual bsp_start routine used.
+ */
+void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default")));
diff --git a/bsps/i386/pc386/start/ldsegs.S b/bsps/i386/pc386/start/ldsegs.S
new file mode 100644
index 0000000000..b56bf836f0
--- /dev/null
+++ b/bsps/i386/pc386/start/ldsegs.S
@@ -0,0 +1,238 @@
+/*-------------------------------------------------------------------------+
+| ldsegs.s v1.1 - PC386 BSP - 1997/08/07
++--------------------------------------------------------------------------+
+| This file assists the board independent startup code by loading the proper
+| segment register values. The values loaded are board dependent. In addition
+| it contains code to enable the A20 line and to reprogram the PIC to relocate
+| the IRQ interrupt vectors to 0x20 -> 0x2f.
+| NOTE: No stack has been established when this routine is invoked.
+|	It returns by jumping back to bspentry.
++--------------------------------------------------------------------------+
+| (C) Copyright 1997 -
+| - NavIST Group - Real-Time Distributed Systems and Industrial Automation
+|
+| http://pandora.ist.utl.pt
+|
+| Instituto Superior Tecnico * Lisboa * PORTUGAL
++--------------------------------------------------------------------------+
+| Disclaimer:
+|
+| This file is provided "AS IS" without warranty of any kind, either
+| expressed or implied.
++--------------------------------------------------------------------------+
+| This code is base on:
+|   ldsegs.s,v 1.4 1996/04/20 16:48:30 joel Exp - go32 BSP
+| With the following copyright notice:
+| **************************************************************************
+| *  COPYRIGHT (c) 1989-1999.
+| *  On-Line Applications Research Corporation (OAR).
+| *
+| *  The license and distribution terms for this file may be
+| *  found in the file LICENSE in this distribution or at
+| *  http://www.rtems.org/license/LICENSE.
+| **************************************************************************
++--------------------------------------------------------------------------*/
+
+#include <rtems/asm.h>
+#include <bsp/tblsizes.h> /* contains sizes of GDT and IDT */
+#include <bspopts.h>
+
+/*----------------------------------------------------------------------------+
+| CODE section
++----------------------------------------------------------------------------*/
+EXTERN (rtems_i8259_masks)
+
+BEGIN_CODE
+
+        EXTERN (_establish_stack)
+	EXTERN (Timer_exit)
+	EXTERN (clockOff)
+
+/*----------------------------------------------------------------------------+
+| pc386_delay
++------------------------------------------------------------------------------
+| Delay is needed after doing I/O.
+|
+| The outb version is OK on most machines BUT the loop version ...
+|
+| will delay for 1us on 1Gz machine, it will take a little bit
+| longer on slower machines, however, it does not matter because we
+| are going to call this function only a few times
+
++----------------------------------------------------------------------------*/
+#define DELAY_USE_OUTB
+
+	.p2align 4
+	.globl _pc386_delay
+	.globl pc386_delay
+pc386_delay:
+_pc386_delay:
+#ifdef 	DELAY_USE_OUTB
+	outb	al, $0x80	# about 1uS delay on most machines
+#else
+	movl	$0x200, eax
+pc386_delay1:
+	dec	eax
+	jnz	pc386_delay1
+#endif
+	ret
+
+/*-------------------------------------------------------------------------+
+|         Function: _load_segments
+|      Description: Current environment is standard PC booted by grub.
+|                   So, there is no value in saving current GDT and IDT
+|                   settings we have to set it up ourseves. (Naturally
+|	            it will be not so in case we are booted by some
+|                   boot monitor, however, then it will be different
+|                   BSP). After that we have to load board segment registers
+|                   with apropriate values +  reprogram PIC.
+| Global Variables: None.
+|        Arguments: None.
+|          Returns: Nothing.
++--------------------------------------------------------------------------*/
+	.p2align 4
+
+        PUBLIC (_load_segments)
+SYM (_load_segments):
+
+	lgdt SYM(gdtdesc)
+	lidt SYM(IDT_Descriptor)
+
+	/* Load CS, flush prefetched queue */
+	ljmp $0x8, $next_step
+
+next_step:
+        /* Load segment registers */
+	movw $0x10, ax
+	movw ax, ss
+	movw ax, ds
+	movw ax, es
+	movw ax, fs
+	movw ax, gs
+
+/*---------------------------------------------------------------------+
+| Now we have to reprogram the interrupts :-(. We put them right after
+| the intel-reserved hardware interrupts, at int 0x20-0x2F. There they
+| won't mess up anything. Sadly IBM really messed this up with the
+| original PC, and they haven't been able to rectify it afterwards. Thus
+| the bios puts interrupts at 0x08-0x0f, which is used for the internal
+| hardware interrupts as well. We just have to reprogram the 8259's, and
+| it isn't fun.
++---------------------------------------------------------------------*/
+
+	movb	$0x11, al		/* initialization sequence          */
+	outb	al, $0x20		/* send it to 8259A-1               */
+	call	SYM(pc386_delay)
+	outb	al, $0xA0		/* and to 8259A-2                   */
+	call	SYM(pc386_delay)
+
+	movb	$0x20, al		/* start of hardware int's (0x20)   */
+	outb	al, $0x21
+	call	SYM(pc386_delay)
+	movb	$0x28, al		/* start of hardware int's 2 (0x28) */
+	outb	al, $0xA1
+	call	SYM(pc386_delay)
+
+	movb	$0x04, al		/* 8259-1 is master                 */
+	outb	al, $0x21
+	call	SYM(pc386_delay)
+	movb	$0x02, al		/* 8259-2 is slave                  */
+	outb	al, $0xA1
+	call	SYM(pc386_delay)
+
+	movb	$0x01, al		/* 8086 mode for both               */
+	outb	al, $0x21
+	call	SYM(pc386_delay)
+	outb	al, $0xA1
+	call	SYM(pc386_delay)
+
+	/*
+	 * The IMR values must correspond to the initial value of i8259s_cache.
+	 */
+	movb	$0xFF, al		/* mask off all interrupts for now  */
+	outb	al, $0xA1
+	call	SYM(pc386_delay)
+	movb	$0xFB, al		/* mask all irq's but irq2 which    */
+	outb	al, $0x21		/* is cascaded                      */
+	call	SYM(pc386_delay)
+	jmp	SYM (_establish_stack)	# return to the bsp entry code
+
+/*-------------------------------------------------------------------------+
+|         Function: _default_int_handler
+|      Description: default interrupt handler
+| Global Variables: None.
+|        Arguments: None.
+|          Returns: Nothing.
++--------------------------------------------------------------------------*/
+	.p2align 4
+
+/*---------------------------------------------------------------------------+
+| GDT itself
++--------------------------------------------------------------------------*/
+#if GDT_SIZE < NUM_SYSTEM_GDT_DESCRIPTORS
+#error "GDT_SIZE must be at least NUM_SYSTEM_GDT_DESCRIPTORS"
+#endif
+
+BEGIN_DATA
+	.p2align 4
+
+	PUBLIC (_Global_descriptor_table)
+SYM (_Global_descriptor_table):
+
+	/* NULL segment */
+	.word 0, 0
+	.byte 0, 0, 0, 0
+
+	/* code segment */
+	.word 0xffff, 0
+	.byte 0, 0x9e, 0xcf, 0
+
+	/* data segment */
+	.word 0xffff, 0
+	.byte 0, 0x92, 0xcf, 0
+
+	/* gs segment */
+	.word 0xffff, 0
+	.byte 0, 0x92, 0xcf, 0
+
+        /* allocated space for user segments */
+        .rept (GDT_SIZE - NUM_SYSTEM_GDT_DESCRIPTORS)
+        .word 0,0,0,0
+        .endr
+
+/*---------------------------------------------------------------------------+
+| Descriptor of GDT
++--------------------------------------------------------------------------*/
+        PUBLIC(gdtdesc)
+SYM(gdtdesc):
+	.word (GDT_SIZE*8 - 1)
+	.long SYM (_Global_descriptor_table)
+
+/*---------------------------------------------------------------------------+
+| IDT itself
++---------------------------------------------------------------------------*/
+	.p2align 4
+
+	PUBLIC(Interrupt_descriptor_table)
+SYM(Interrupt_descriptor_table):
+	.rept IDT_SIZE
+	.word 0,0,0,0
+	.endr
+
+/*---------------------------------------------------------------------------+
+| Descriptor of IDT
++--------------------------------------------------------------------------*/
+
+	.p2align 4
+	PUBLIC(IDT_Descriptor)
+SYM(IDT_Descriptor):
+	.word  (IDT_SIZE*8 - 1)
+	.long  SYM (Interrupt_descriptor_table)
+
+END_DATA
+
+    .section .m_hdr
+	.long 0x1BADB002
+	.long 0
+	.long 0xE4524FFE
+END
diff --git a/bsps/i386/pc386/start/linkcmds b/bsps/i386/pc386/start/linkcmds
new file mode 100644
index 0000000000..5fc3444c9e
--- /dev/null
+++ b/bsps/i386/pc386/start/linkcmds
@@ -0,0 +1,253 @@
+/*
+ *  Copy of default "default linker script, for normal executables"
+ *  provided with binutils 2.18 with minor modifications for use
+ *  as pc386 linkcmds.  These changes include:
+ *
+ *    + sections commented out marked with "XXX commented out --joel"
+ *    + addition of m_hdr section
+ *    + addition of FreeBSD sysctl sections
+ */
+
+/* 
+ * XXX commented out --joel
+OUTPUT_FORMAT("elf32-i386", "elf32-i386",
+	      "elf32-i386")
+OUTPUT_ARCH(i386)
+*/
+STARTUP(start.o)
+ENTRY(start)
+HeapSize = DEFINED(HeapSize) ? HeapSize : 
+          DEFINED(_HeapSize) ? _HeapSize : 0x0;
+RamSize = DEFINED(RamSize) ? RamSize    : 
+          DEFINED(_RamSize) ? _RamSize : 0xFFFFFFFF;
+
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+/*
+ * XXX commented out --joel
+  PROVIDE (__executable_start = 0x08048000); . = 0x08048000 + SIZEOF_HEADERS;
+*/
+  .interp         : { *(.interp) }
+  .note.gnu.build-id : { *(.note.gnu.build-id) }
+  .hash           : { *(.hash) }
+  .gnu.hash       : { *(.gnu.hash) }
+  .dynsym         : { *(.dynsym) }
+  .dynstr         : { *(.dynstr) }
+  .gnu.version    : { *(.gnu.version) }
+  .gnu.version_d  : { *(.gnu.version_d) }
+  .gnu.version_r  : { *(.gnu.version_r) }
+  .rel.init       : { *(.rel.init) }
+  .rela.init      : { *(.rela.init) }
+  .rel.text       : { *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) }
+  .rela.text      : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) }
+  .rel.fini       : { *(.rel.fini) }
+  .rela.fini      : { *(.rela.fini) }
+  .rel.rodata     : { *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) }
+  .rela.rodata    : { *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) }
+  .rel.data.rel.ro   : { *(.rel.data.rel.ro* .rel.gnu.linkonce.d.rel.ro.*) }
+  .rela.data.rel.ro   : { *(.rela.data.rel.ro* .rela.gnu.linkonce.d.rel.ro.*) }
+  .rel.data       : { *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*) }
+  .rela.data      : { *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*) }
+  .rel.tdata	  : { *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*) }
+  .rela.tdata	  : { *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*) }
+  .rel.tbss	  : { *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*) }
+  .rela.tbss	  : { *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*) }
+  .rel.ctors      : { *(.rel.ctors) }
+  .rela.ctors     : { *(.rela.ctors) }
+  .rel.dtors      : { *(.rel.dtors) }
+  .rela.dtors     : { *(.rela.dtors) }
+  .rel.got        : { *(.rel.got) }
+  .rela.got       : { *(.rela.got) }
+  .rel.bss        : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) }
+  .rela.bss       : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) }
+  .rel.plt        : { *(.rel.plt) }
+  .rela.plt       : { *(.rela.plt) }
+  .plt            : { *(.plt) }
+  .text           :
+  {
+   *(.m_hdr)
+    *(.text .stub .text.* .gnu.linkonce.t.*)
+    KEEP (*(.text.*personality*))
+    /* .gnu.warning sections are handled specially by elf32.em.  */
+    *(.gnu.warning)
+
+  } =0x90909090
+
+  .rtemsroset : {
+    /* for pre rtems-libbsd FreeBSD code */
+    __start_set_sysctl_set = .;
+    *(set_sysctl_*);
+    __stop_set_sysctl_set = .;
+    *(set_domain_*);
+    *(set_pseudo_*);
+
+    KEEP (*(SORT(.rtemsroset.*)))
+  } =0x90909090
+
+  .init           :
+  {
+    KEEP (*(.init))
+  } =0x90909090
+  .fini           :
+  {
+    KEEP (*(.fini))
+  } =0x90909090
+  PROVIDE (__etext = .);
+  PROVIDE (_etext = .);
+  PROVIDE (etext = .);
+  .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
+  .rodata1        : { *(.rodata1) }
+  .tdata : {
+    _TLS_Data_begin = .;
+    *(.tdata .tdata.* .gnu.linkonce.td.*)
+    _TLS_Data_end = .;
+  }
+  .tbss : {
+    _TLS_BSS_begin = .;
+    *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon)
+    _TLS_BSS_end = .;
+  }
+  _TLS_Data_size = _TLS_Data_end - _TLS_Data_begin;
+  _TLS_Data_begin = _TLS_Data_size != 0 ? _TLS_Data_begin : _TLS_BSS_begin;
+  _TLS_Data_end = _TLS_Data_size != 0 ? _TLS_Data_end : _TLS_BSS_begin;
+  _TLS_BSS_size = _TLS_BSS_end - _TLS_BSS_begin;
+  _TLS_Size = _TLS_BSS_end - _TLS_Data_begin;
+  _TLS_Alignment = MAX (ALIGNOF (.tdata), ALIGNOF (.tbss));
+  .eh_frame_hdr : { *(.eh_frame_hdr) }
+  .eh_frame       : ONLY_IF_RO { KEEP (*(.eh_frame)) }
+  .gcc_except_table   : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) }
+  /* Adjust the address for the data segment.  We want to adjust up to
+     the same address within the page on the next page up.  */
+  . = ALIGN (CONSTANT (MAXPAGESIZE)) - ((CONSTANT (MAXPAGESIZE) - .) & (CONSTANT (MAXPAGESIZE) - 1)); . = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE));
+  /* Exception handling  */
+  .eh_frame       : ONLY_IF_RW { KEEP (*(.eh_frame)) }
+  .gcc_except_table   : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) }
+  /* Thread Local Storage sections  */
+  .tdata	  : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
+  .tbss		  : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
+  .preinit_array     :
+  {
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+  }
+  .init_array     :
+  {
+     PROVIDE_HIDDEN (__init_array_start = .);
+     KEEP (*(SORT(.init_array.*)))
+     KEEP (*(.init_array))
+     PROVIDE_HIDDEN (__init_array_end = .);
+  }
+  .fini_array     :
+  {
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(.fini_array))
+    KEEP (*(SORT(.fini_array.*)))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+  }
+  .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))
+    KEEP (*crtbegin?.o(.ctors))
+    /* We don't want to include the .ctor section 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 *crtend?.o ) .ctors))
+    KEEP (*(SORT(.ctors.*)))
+    KEEP (*(.ctors))
+  }
+  .dtors          :
+  {
+    KEEP (*crtbegin.o(.dtors))
+    KEEP (*crtbegin?.o(.dtors))
+    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+    KEEP (*(SORT(.dtors.*)))
+    KEEP (*(.dtors))
+  }
+  .jcr            : { KEEP (*(.jcr)) }
+  .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*) }
+  .dynamic        : { *(.dynamic) }
+  .got            : { *(.got) }
+  . = DATA_SEGMENT_RELRO_END (12, .);
+  .got.plt        : { *(.got.plt) }
+  .data           :
+  {
+    *(.data .data.* .gnu.linkonce.d.*)
+    KEEP (*(.gnu.linkonce.d.*personality*))
+    SORT(CONSTRUCTORS)
+  }
+  .data1          : { *(.data1) }
+  .rtemsrwset     : { KEEP (*(SORT(.rtemsrwset.*))) }
+  _edata = .; PROVIDE (edata = .);
+  __bss_start = .;
+  .bss            :
+  {
+   *(.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.
+      FIXME: Why do we need it? When there is no .bss section, we don't
+      pad the .data section.  */
+   . = ALIGN(. != 0 ? 32 / 8 : 1);
+  }
+  . = ALIGN(32 / 8);
+  . = ALIGN(32 / 8);
+  _end = .; PROVIDE (end = .);
+  . = ALIGN(0x10);
+  WorkAreaBase = .;
+  . = DATA_SEGMENT_END (.);
+
+  /* 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) }
+  /* 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) }
+  /* DWARF 3 */
+  .debug_pubtypes 0 : { *(.debug_pubtypes) }
+  .debug_ranges   0 : { *(.debug_ranges) }
+  /* DWARF extension */
+  .debug_macro    0 : { *(.debug_macro) }
+  .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
+  /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) }
+}