date and time created 83/05/03 13:47:49 by sam

SCCS-vsn: include/a.out.h 4.1

diff --git a/usr/src/include/a.out.h b/usr/src/include/a.out.h
new file mode 100644 (file)
index 0000000..f0cb47c
--- /dev/null
+++ b/usr/src/include/a.out.h
@@ -0,0 +1,87 @@
+/*     a.out.h 4.1     83/05/03        */
+
+/*
+ * Header prepended to each a.out file.
+ */
+struct exec {
+       long    a_magic;        /* magic number */
+unsigned long  a_text;         /* size of text segment */
+unsigned long  a_data;         /* size of initialized data */
+unsigned long  a_bss;          /* size of uninitialized data */
+unsigned long  a_syms;         /* size of symbol table */
+unsigned long  a_entry;        /* entry point */
+unsigned long  a_trsize;       /* size of text relocation */
+unsigned long  a_drsize;       /* size of data relocation */
+};
+
+#define        OMAGIC  0407            /* old impure format */
+#define        NMAGIC  0410            /* read-only text */
+#define        ZMAGIC  0413            /* demand load format */
+
+/*
+ * Macros which take exec structures as arguments and tell whether
+ * the file has a reasonable magic number or offsets to text|symbols|strings.
+ */
+#define        N_BADMAG(x) \
+    (((x).a_magic)!=OMAGIC && ((x).a_magic)!=NMAGIC && ((x).a_magic)!=ZMAGIC)
+
+#define        N_TXTOFF(x) \
+       ((x).a_magic==ZMAGIC ? 1024 : sizeof (struct exec))
+#define N_SYMOFF(x) \
+       (N_TXTOFF(x) + (x).a_text+(x).a_data + (x).a_trsize+(x).a_drsize)
+#define        N_STROFF(x) \
+       (N_SYMOFF(x) + (x).a_syms)
+
+/*
+ * Format of a relocation datum.
+ */
+struct relocation_info {
+       int     r_address;      /* address which is relocated */
+unsigned int   r_symbolnum:24, /* local symbol ordinal */
+               r_pcrel:1,      /* was relocated pc relative already */
+               r_length:2,     /* 0=byte, 1=word, 2=long */
+               r_extern:1,     /* does not include value of sym referenced */
+               :4;             /* nothing, yet */
+};
+
+/*
+ * Format of a symbol table entry; this file is included by <a.out.h>
+ * and should be used if you aren't interested the a.out header
+ * or relocation information.
+ */
+struct nlist {
+       union {
+               char    *n_name;        /* for use when in-core */
+               long    n_strx;         /* index into file string table */
+       } n_un;
+unsigned char  n_type;         /* type flag, i.e. N_TEXT etc; see below */
+       char    n_other;        /* unused */
+       short   n_desc;         /* see <stab.h> */
+unsigned long  n_value;        /* value of this symbol (or sdb offset) */
+};
+#define        n_hash  n_desc          /* used internally by ld */
+
+/*
+ * Simple values for n_type.
+ */
+#define        N_UNDF  0x0             /* undefined */
+#define        N_ABS   0x2             /* absolute */
+#define        N_TEXT  0x4             /* text */
+#define        N_DATA  0x6             /* data */
+#define        N_BSS   0x8             /* bss */
+#define        N_COMM  0x12            /* common (internal to ld) */
+#define        N_FN    0x1f            /* file name symbol */
+
+#define        N_EXT   01              /* external bit, or'ed in */
+#define        N_TYPE  0x1e            /* mask for all the type bits */
+
+/*
+ * Sdb entries have some of the N_STAB bits set.
+ * These are given in <stab.h>
+ */
+#define        N_STAB  0xe0            /* if any of these bits set, a SDB entry */
+
+/*
+ * Format for namelist values.
+ */
+#define        N_FORMAT        "%08x"