include/linux/flat.h
changeset 0 aa628870c1d3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/linux/flat.h	Sun Jan 11 20:20:11 2009 +0100
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2002-2003  David McCullough <davidm@snapgear.com>
+ * Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
+ *                          The Silver Hammer Group, Ltd.
+ *
+ * This file provides the definitions and structures needed to
+ * support uClinux flat-format executables.
+ */
+
+#ifndef _LINUX_FLAT_H
+#define _LINUX_FLAT_H
+
+#ifdef __KERNEL__
+#include <asm/flat.h>
+#endif
+
+#define	FLAT_VERSION			0x00000004L
+
+#ifdef CONFIG_BINFMT_SHARED_FLAT
+#define	MAX_SHARED_LIBS			(4)
+#else
+#define	MAX_SHARED_LIBS			(1)
+#endif
+
+/*
+ * To make everything easier to port and manage cross platform
+ * development,  all fields are in network byte order.
+ */
+
+struct flat_hdr {
+	char magic[4];
+	unsigned long rev;          /* version (as above) */
+	unsigned long entry;        /* Offset of first executable instruction
+	                               with text segment from beginning of file */
+	unsigned long data_start;   /* Offset of data segment from beginning of
+	                               file */
+	unsigned long data_end;     /* Offset of end of data segment
+	                               from beginning of file */
+	unsigned long bss_end;      /* Offset of end of bss segment from beginning
+	                               of file */
+
+	/* (It is assumed that data_end through bss_end forms the bss segment.) */
+
+	unsigned long stack_size;   /* Size of stack, in bytes */
+	unsigned long reloc_start;  /* Offset of relocation records from
+	                               beginning of file */
+	unsigned long reloc_count;  /* Number of relocation records */
+	unsigned long flags;       
+	unsigned long build_date;   /* When the program/library was built */
+	unsigned long filler[5];    /* Reservered, set to zero */
+};
+
+#define FLAT_FLAG_RAM    0x0001 /* load program entirely into RAM */
+#define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */
+#define FLAT_FLAG_GZIP   0x0004 /* all but the header is compressed */
+#define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */
+#define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */
+
+
+#ifdef __KERNEL__ /* so systems without linux headers can compile the apps */
+/*
+ * While it would be nice to keep this header clean,  users of older
+ * tools still need this support in the kernel.  So this section is
+ * purely for compatibility with old tool chains.
+ *
+ * DO NOT make changes or enhancements to the old format please,  just work
+ *        with the format above,  except to fix bugs with old format support.
+ */
+
+#include <asm/byteorder.h>
+
+#define	OLD_FLAT_VERSION			0x00000002L
+#define OLD_FLAT_RELOC_TYPE_TEXT	0
+#define OLD_FLAT_RELOC_TYPE_DATA	1
+#define OLD_FLAT_RELOC_TYPE_BSS		2
+
+typedef union {
+	unsigned long	value;
+	struct {
+# if defined(mc68000) && !defined(CONFIG_COLDFIRE)
+		signed long offset : 30;
+		unsigned long type : 2;
+#   	define OLD_FLAT_FLAG_RAM    0x1 /* load program entirely into RAM */
+# elif defined(__BIG_ENDIAN_BITFIELD)
+		unsigned long type : 2;
+		signed long offset : 30;
+#   	define OLD_FLAT_FLAG_RAM    0x1 /* load program entirely into RAM */
+# elif defined(__LITTLE_ENDIAN_BITFIELD)
+		signed long offset : 30;
+		unsigned long type : 2;
+#   	define OLD_FLAT_FLAG_RAM    0x1 /* load program entirely into RAM */
+# else
+#   	error "Unknown bitfield order for flat files."
+# endif
+	} reloc;
+} flat_v2_reloc_t;
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_FLAT_H */