to the Free Software Foundation, 59 Temple Place - Suite 330, Cambridge, MA
02139, USA. */
-/*
- * This file is a modified version of 'a.out.h'. It is to be used in all GNU
- * tools modified to support the i80960 b.out format (or tools that operate on
- * object files created by such tools).
- *
- * All i80960 development is done in a CROSS-DEVELOPMENT environment. I.e.,
- * object code is generated on, and executed under the direction of a symbolic
- * debugger running on, a host system. We do not want to be subject to the
- * vagaries of which host it is or whether it supports COFF or a.out format, or
- * anything else. We DO want to:
- *
- * o always generate the same format object files, regardless of host.
- *
- * o have an 'a.out' header that we can modify for our own purposes
- * (the 80960 is typically an embedded processor and may require
- * enhanced linker support that the normal a.out.h header can't
- * accommodate).
- *
- * As for byte-ordering, the following rules apply:
- *
- * o Text and data that is actually downloaded to the target is always
- * in i80960 (little-endian) order.
- *
- * o All other numbers (in the header, symbols, relocation directives)
- * are in host byte-order: object files CANNOT be lifted from a
- * little-end host and used on a big-endian (or vice versa) without
- * modification.
- * ==> THIS IS NO LONGER TRUE USING BFD. WE CAN GENERATE ANY BYTE ORDER
- * FOR THE HEADER, AND READ ANY BYTE ORDER. PREFERENCE WOULD BE TO
- * USE LITTLE-ENDIAN BYTE ORDER THROUGHOUT, REGARDLESS OF HOST. <==
- *
- * o The downloader ('comm960') takes care to generate a pseudo-header
- * with correct (i80960) byte-ordering before shipping text and data
- * off to the NINDY monitor in the target systems. Symbols and
- * relocation info are never sent to the target.
- */
+/* This file is a modified version of 'a.out.h'. It is to be used in all GNU
+ tools modified to support the i80960 b.out format (or tools that operate on
+ object files created by such tools).
+
+ All i80960 development is done in a CROSS-DEVELOPMENT environment. I.e.,
+ object code is generated on, and executed under the direction of a symbolic
+ debugger running on, a host system. We do not want to be subject to the
+ vagaries of which host it is or whether it supports COFF or a.out format, or
+ anything else. We DO want to:
+
+ o always generate the same format object files, regardless of host.
+
+ o have an 'a.out' header that we can modify for our own purposes
+ (the 80960 is typically an embedded processor and may require
+ enhanced linker support that the normal a.out.h header can't
+ accommodate).
+
+ As for byte-ordering, the following rules apply:
+
+ o Text and data that is actually downloaded to the target is always
+ in i80960 (little-endian) order.
+
+ o All other numbers (in the header, symbols, relocation directives)
+ are in host byte-order: object files CANNOT be lifted from a
+ little-end host and used on a big-endian (or vice versa) without
+ modification.
+ ==> This is no longer true using BFD. We can generate any byte order
+ for the header, and read any byte order. Preference would be to
+ use little-endian byte order throughout, regardless of host. <==
+
+ o The downloader ('comm960') takes care to generate a pseudo-header
+ with correct (i80960) byte-ordering before shipping text and data
+ off to the NINDY monitor in the target systems. Symbols and
+ relocation info are never sent to the target. */
#define OBJ_BOUT 1
#define BMAGIC 0415
/* We don't accept the following (see N_BADMAG macro).
- * They're just here so GNU code will compile.
- */
-#define OMAGIC 0407 /* old impure format */
-#define NMAGIC 0410 /* read-only text */
-#define ZMAGIC 0413 /* demand load format */
+ They're just here so GNU code will compile. */
+#define OMAGIC 0407 /* Old impure format. */
+#define NMAGIC 0410 /* Read-only text. */
+#define ZMAGIC 0413 /* Demand load format. */
#ifndef DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE
-#define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (BMAGIC)
-#endif /* DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE */
-
-/* FILE HEADER
- * All 'lengths' are given as a number of bytes.
- * All 'alignments' are for relinkable files only; an alignment of
- * 'n' indicates the corresponding segment must begin at an
- * address that is a multiple of (2**n).
- */
+#define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE BMAGIC
+#endif
+
+/* File header:
+ All 'lengths' are given as a number of bytes.
+ All 'alignments' are for relinkable files only; an alignment of
+ 'n' indicates the corresponding segment must begin at an
+ address that is a multiple of (2**n). */
struct exec
- {
- /* Standard stuff */
- unsigned long a_magic; /* Identifies this as a b.out file */
- unsigned long a_text; /* Length of text */
- unsigned long a_data; /* Length of data */
- unsigned long a_bss; /* Length of runtime uninitialized data area */
- unsigned long a_syms; /* Length of symbol table */
- unsigned long a_entry; /* Runtime start address */
- unsigned long a_trsize; /* Length of text relocation info */
- unsigned long a_drsize; /* Length of data relocation info */
-
- /* Added for i960 */
- unsigned long a_tload; /* Text runtime load address */
- unsigned long a_dload; /* Data runtime load address */
- unsigned char a_talign; /* Alignment of text segment */
- unsigned char a_dalign; /* Alignment of data segment */
- unsigned char a_balign; /* Alignment of bss segment */
- unsigned char a_relaxable; /* Contains enough info to relax */
- };
+{
+ /* Standard stuff. */
+ unsigned long a_magic; /* Identifies this as a b.out file. */
+ unsigned long a_text; /* Length of text. */
+ unsigned long a_data; /* Length of data. */
+ unsigned long a_bss; /* Length of runtime uninitialized data area. */
+ unsigned long a_syms; /* Length of symbol table. */
+ unsigned long a_entry; /* Runtime start address. */
+ unsigned long a_trsize; /* Length of text relocation info. */
+ unsigned long a_drsize; /* Length of data relocation info. */
+
+ /* Added for i960 */
+ unsigned long a_tload; /* Text runtime load address. */
+ unsigned long a_dload; /* Data runtime load address. */
+ unsigned char a_talign; /* Alignment of text segment. */
+ unsigned char a_dalign; /* Alignment of data segment. */
+ unsigned char a_balign; /* Alignment of bss segment. */
+ unsigned char a_relaxable; /* Contains enough info to relax. */
+};
#define EXEC_BYTES_SIZE (10 * 4 + 4 * 1)
-#define N_BADMAG(x) (((x).a_magic)!=BMAGIC)
+#define N_BADMAG(x) (((x).a_magic) != BMAGIC)
#define N_TXTOFF(x) EXEC_BYTES_SIZE
#define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
#define N_TROFF(x) ( N_DATOFF(x) + (x).a_data )
#define N_SYMOFF(x) ( N_DROFF(x) + (x).a_drsize )
#define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
-/* A single entry in the symbol table
- */
+/* A single entry in the symbol table. */
struct nlist
{
union
{
char *n_name;
struct nlist *n_next;
- long n_strx; /* Index into string table */
+ long n_strx; /* Index into string table. */
}
n_un;
- unsigned char n_type; /* See below */
- char n_other; /* Used in i80960 support -- see below */
+ unsigned char n_type; /* See below. */
+ char n_other; /* Used in i80960 support -- see below. */
short n_desc;
unsigned long n_value;
};
typedef struct nlist obj_symbol_type;
-/* Legal values of n_type
- */
-#define N_UNDF 0 /* Undefined symbol */
-#define N_ABS 2 /* Absolute symbol */
-#define N_TEXT 4 /* Text symbol */
-#define N_DATA 6 /* Data symbol */
-#define N_BSS 8 /* BSS symbol */
-#define N_FN 31 /* Filename symbol */
+/* Legal values of n_type. */
+#define N_UNDF 0 /* Undefined symbol. */
+#define N_ABS 2 /* Absolute symbol. */
+#define N_TEXT 4 /* Text symbol. */
+#define N_DATA 6 /* Data symbol. */
+#define N_BSS 8 /* BSS symbol. */
+#define N_FN 31 /* Filename symbol. */
-#define N_EXT 1 /* External symbol (OR'd in with one of above) */
-#define N_TYPE 036 /* Mask for all the type bits */
-#define N_STAB 0340 /* Mask for all bits used for SDB entries */
+#define N_EXT 1 /* External symbol (OR'd in with one of above). */
+#define N_TYPE 036 /* Mask for all the type bits. */
+#define N_STAB 0340 /* Mask for all bits used for SDB entries. */
#ifndef CUSTOM_RELOC_FORMAT
struct relocation_info
{
- int r_address; /* File address of item to be relocated */
+ int r_address; /* File address of item to be relocated. */
unsigned
- r_index:24, /* Index of symbol on which relocation is based*/
+ r_index:24, /* Index of symbol on which relocation is based. */
r_pcrel:1, /* 1 => relocate PC-relative; else absolute
- * On i960, pc-relative implies 24-bit
- * address, absolute implies 32-bit.
- */
+ On i960, pc-relative implies 24-bit
+ address, absolute implies 32-bit. */
r_length:2, /* Number of bytes to relocate:
- * 0 => 1 byte
- * 1 => 2 bytes
- * 2 => 4 bytes -- only value used for i960
- */
- r_extern:1, r_bsr:1, /* Something for the GNU NS32K assembler */
- r_disp:1, /* Something for the GNU NS32K assembler */
- r_callj:1, /* 1 if relocation target is an i960 'callj' */
- nuthin:1; /* Unused */
+ 0 => 1 byte
+ 1 => 2 bytes
+ 2 => 4 bytes -- only value used for i960. */
+ r_extern:1, r_bsr:1, /* Something for the GNU NS32K assembler. */
+ r_disp:1, /* Something for the GNU NS32K assembler. */
+ r_callj:1, /* 1 if relocation target is an i960 'callj'. */
+ nuthin:1; /* Unused. */
};
#endif /* CUSTOM_RELOC_FORMAT */
-/*
- * Macros to extract information from a symbol table entry.
- * This syntactic indirection allows independence regarding a.out or coff.
- * The argument (s) of all these macros is a pointer to a symbol table entry.
- */
+/* Macros to extract information from a symbol table entry.
+ This syntactic indirection allows independence regarding a.out or coff.
+ The argument (s) of all these macros is a pointer to a symbol table entry. */
-/* Predicates */
-/* True if the symbol is external */
+/* Predicates. */
+/* True if the symbol is external. */
#define S_IS_EXTERNAL(s) ((s)->sy_symbol.n_type & N_EXT)
-/* True if symbol has been defined, ie is in N_{TEXT,DATA,BSS,ABS} or N_EXT */
+/* True if symbol has been defined, ie is in N_{TEXT,DATA,BSS,ABS} or N_EXT. */
#define S_IS_DEFINED(s) ((S_GET_TYPE(s) != N_UNDF) || (S_GET_DESC(s) != 0))
/* Return true for symbols that should not be reduced to section
#define S_IS_REGISTER(s) ((s)->sy_symbol.n_type == N_REGISTER)
-/* True if a debug special symbol entry */
+/* True if a debug special symbol entry. */
#define S_IS_DEBUG(s) ((s)->sy_symbol.n_type & N_STAB)
-/* True if a symbol is local symbol name */
+/* True if a symbol is local symbol name. */
#define S_IS_LOCAL(s) \
((S_GET_NAME (s) \
&& !S_IS_DEBUG (s) \
|| (flag_strip_local_absolute \
&& !S_IS_EXTERNAL(s) \
&& S_GET_SEGMENT(s) == absolute_section))
-/* True if a symbol is not defined in this file */
+/* True if a symbol is not defined in this file. */
#define S_IS_EXTERN(s) ((s)->sy_symbol.n_type & N_EXT)
-/* True if the symbol has been generated because of a .stabd directive */
+/* True if the symbol has been generated because of a .stabd directive. */
#define S_IS_STABD(s) (S_GET_NAME(s) == NULL)
-/* Accessors */
-/* The name of the symbol */
+/* Accessors. */
+/* The name of the symbol. */
#define S_GET_NAME(s) ((s)->sy_symbol.n_un.n_name)
-/* The pointer to the string table */
+/* The pointer to the string table. */
#define S_GET_OFFSET(s) ((s)->sy_symbol.n_un.n_strx)
-/* The type of the symbol */
+/* The type of the symbol. */
#define S_GET_TYPE(s) ((s)->sy_symbol.n_type & N_TYPE)
-/* The numeric value of the segment */
+/* The numeric value of the segment. */
#define S_GET_SEGMENT(s) (N_TYPE_seg[S_GET_TYPE(s)])
-/* The n_other expression value */
+/* The n_other expression value. */
#define S_GET_OTHER(s) ((s)->sy_symbol.n_other)
-/* The n_desc expression value */
+/* The n_desc expression value. */
#define S_GET_DESC(s) ((s)->sy_symbol.n_desc)
-/* Modifiers */
-/* Assume that a symbol cannot be simultaneously in more than on segment */
-/* set segment */
-#define S_SET_SEGMENT(s,seg) ((s)->sy_symbol.n_type &= ~N_TYPE,(s)->sy_symbol.n_type|=SEGMENT_TO_SYMBOL_TYPE(seg))
-/* The symbol is external */
+/* Modifiers. */
+/* Assume that a symbol cannot be simultaneously in more than on segment. */
+/* Set segment. */
+#define S_SET_SEGMENT(s,seg) ((s)->sy_symbol.n_type &= ~N_TYPE,(s)->sy_symbol.n_type |= SEGMENT_TO_SYMBOL_TYPE (seg))
+/* The symbol is external. */
#define S_SET_EXTERNAL(s) ((s)->sy_symbol.n_type |= N_EXT)
-/* The symbol is not external */
+/* The symbol is not external. */
#define S_CLEAR_EXTERNAL(s) ((s)->sy_symbol.n_type &= ~N_EXT)
-/* Set the name of the symbol */
+/* Set the name of the symbol. */
#define S_SET_NAME(s,v) ((s)->sy_symbol.n_un.n_name = (v))
-/* Set the offset in the string table */
+/* Set the offset in the string table. */
#define S_SET_OFFSET(s,v) ((s)->sy_symbol.n_un.n_strx = (v))
-/* Set the n_other expression value */
+/* Set the n_other expression value. */
#define S_SET_OTHER(s,v) ((s)->sy_symbol.n_other = (v))
-/* Set the n_desc expression value */
+/* Set the n_desc expression value. */
#define S_SET_DESC(s,v) ((s)->sy_symbol.n_desc = (v))
-/* Set the n_type value */
+/* Set the n_type value. */
#define S_SET_TYPE(s,v) ((s)->sy_symbol.n_type = (v))
-/* File header macro and type definition */
+/* File header macro and type definition. */
-#define H_GET_FILE_SIZE(h) (EXEC_BYTES_SIZE + \
- H_GET_TEXT_SIZE(h) + H_GET_DATA_SIZE(h) + \
- H_GET_SYMBOL_TABLE_SIZE(h) + \
- H_GET_TEXT_RELOCATION_SIZE(h) + \
- H_GET_DATA_RELOCATION_SIZE(h) + \
- (h)->string_table_size)
+#define H_GET_FILE_SIZE(h) (EXEC_BYTES_SIZE \
+ + H_GET_TEXT_SIZE (h) \
+ + H_GET_DATA_SIZE(h) \
+ + H_GET_SYMBOL_TABLE_SIZE (h) \
+ + H_GET_TEXT_RELOCATION_SIZE (h) \
+ + H_GET_DATA_RELOCATION_SIZE (h) \
+ + (h)->string_table_size)
#define H_GET_HEADER_SIZE(h) EXEC_BYTES_SIZE
#define H_GET_TEXT_SIZE(h) ((h)->header.a_text)
#ifdef EXEC_MACHINE_TYPE
#define H_GET_MACHINE_TYPE(h) ((h)->header.a_machtype)
-#endif /* EXEC_MACHINE_TYPE */
+#endif /* EXEC_MACHINE_TYPE. */
#ifdef EXEC_VERSION
#define H_GET_VERSION(h) ((h)->header.a_version)
-#endif /* EXEC_VERSION */
+#endif /* EXEC_VERSION. */
#define H_SET_TEXT_SIZE(h,v) ((h)->header.a_text = (v))
#define H_SET_DATA_SIZE(h,v) ((h)->header.a_data = (v))
#define H_SET_STRING_SIZE(h,v) ((h)->string_table_size = (v))
#ifdef EXEC_MACHINE_TYPE
#define H_SET_MACHINE_TYPE(h,v) ((h)->header.a_machtype = (v))
-#endif /* EXEC_MACHINE_TYPE */
+#endif /* EXEC_MACHINE_TYPE. */
#ifdef EXEC_VERSION
#define H_SET_VERSION(h,v) ((h)->header.a_version = (v))
-#endif /* EXEC_VERSION */
+#endif /* EXEC_VERSION. */
typedef struct
{
- struct exec header; /* a.out header */
- long string_table_size; /* names + '\0' + sizeof (int) */
+ struct exec header; /* a.out header. */
+ long string_table_size; /* names + '\0' + sizeof (int). */
}
object_headers;
-/* unused hooks. */
+/* Unused hooks. */
#define OBJ_EMIT_LINENO(a, b, c) {;}
#define obj_pre_write_hook(a) {;}
#define host_number_to_chars number_to_chars_littleendian
#endif
-#if __STDC__
struct fix;
-#endif
-extern void tc_aout_fix_to_chars PARAMS ((char *where,
- struct fix *fixP,
- relax_addressT segment_address));
-extern void tc_bout_fix_to_chars PARAMS ((char *where,
- struct fix *fixP,
- relax_addressT segment_address));
+
+extern void tc_aout_fix_to_chars (char *, struct fix *, relax_addressT);
+extern void tc_bout_fix_to_chars (char *, struct fix *, relax_addressT);
#define AOUT_STABS
projects / platform / upstream / binutils.git / blobdiff