Example Makefile and linker script for building a run-from-flash

gzboot image for the IQ80310 with room for 2M of compressed data.

sys/arch/evbarm/stand/gzboot/IQ80310_flash_0x80000/Makefile

@@ -0,0 +1,16 @@
+#	$NetBSD: Makefile,v 1.1 2002/02/23 19:16:54 thorpej Exp $
+
+S=	${.CURDIR}/../../../../..
+
+PLATFORM= IQ80310
+RELOC= 0x80000
+MAXIMAGESIZE= 2097152	# 2M
+LOADADDR= 0xa0200000
+
+CPPFLAGS+= -DCONSPEED=115200
+
+LDSCRIPT= ${.CURDIR}/ldscript
+
+SRCS+=	iq80310_cons.c i80312_mem.c
+
+.include "${S}/arch/evbarm/stand/gzboot/Makefile.gzboot"

sys/arch/evbarm/stand/gzboot/IQ80310_flash_0x80000/ldscript

@@ -0,0 +1,70 @@
+OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm",
+	      "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(start)
+MEMORY
+{
+  /* We will locate the .text section in flash, and run directly
+     from there.  The data and bss sections are small, and we
+     will locate them offset 1MB in SDRAM.  */
+  flash : o = 0x80000, l = 6M
+  sdram : o = 0xa0100000, l = 1M	/* kernel loads at 0xa0200000 */
+}
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  .text      :
+  {
+    *(.text)
+    *(.text.*)
+    *(.stub)
+    *(.glue_7t) *(.glue_7)
+    *(.rodata) *(.rodata.*)
+  } > flash =0
+  PROVIDE (__etext = .);
+  PROVIDE (_etext = .);
+  PROVIDE (etext = .);
+  .data    :
+  AT (ADDR(.text) + SIZEOF(.text))
+  {
+    __data_start = . ;
+    *(.data)
+    *(.data.*)
+  } > sdram
+  .sdata     : 
+  AT (ADDR(.text) + SIZEOF(.text) + SIZEOF(.data))
+  {
+    *(.sdata) 
+    *(.sdata.*)
+  } > sdram
+  _edata = .;
+  PROVIDE (edata = .);
+  __bss_start = .;
+  __bss_start__ = .;
+  .sbss      :
+  {
+    PROVIDE (__sbss_start = .);
+    PROVIDE (___sbss_start = .);
+    *(.dynsbss)
+    *(.sbss)
+    *(.sbss.*)
+    *(.scommon)
+    PROVIDE (__sbss_end = .);
+    PROVIDE (___sbss_end = .);
+  } > sdram
+  .bss       :
+  {
+   *(.dynbss)
+   *(.bss)
+   *(.bss.*)
+   *(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);
+  } > sdram
+  . = ALIGN(32 / 8);
+  _end = .;
+  _bss_end__ = . ; __bss_end__ = . ; __end__ = . ;
+  PROVIDE (end = .);
+}