BSD 3 development

[unix-history] / usr / include / a.out.h

diff --git a/usr/include/a.out.h b/usr/include/a.out.h
index 75e2ba9..51fbd09 100644 (file)
--- a/usr/include/a.out.h
+++ b/usr/include/a.out.h
@@ -1,33 +1,78 @@
+/*
+ * Format of an a.out header
+ */
+ 

 struct exec {  /* a.out header */
 struct exec {  /* a.out header */

-       int             a_magic;        /* magic number */
-       unsigned        a_text;         /* size of text segment */
-       unsigned        a_data;         /* size of initialized data */
-       unsigned        a_bss;          /* size of unitialized data */
-       unsigned        a_syms;         /* size of symbol table */
-       unsigned        a_entry;        /* entry point */
-       unsigned        a_unused;       /* not used */
-       unsigned        a_flag;         /* relocation info stripped */
+       int             a_magic;        /* magic number */
+       unsigned        a_text;         /* size of text segment */
+       unsigned        a_data;         /* size of initialized data */
+       unsigned        a_bss;          /* size of uninitialized data */
+       unsigned        a_syms;         /* size of symbol table */
+       unsigned        a_entry;        /* entry point */
+       unsigned        a_trsize;       /* size of text relocation */
+       unsigned        a_drsize;       /* size of data relocation */

 };
 
 };
 

-#define        A_MAGIC1        0407            /* normal */
-#define        A_MAGIC2        0410            /* read-only text */
-#define        A_MAGIC3        0411            /* separated I&D */
-#define        A_MAGIC4        0405            /* overlay */
+#define        A_MAGIC1        0407            /* normal */
+#define        A_MAGIC2        0410            /* read-only text */
+#define        A_MAGIC3        0411            /* separated I&D (not on VAX) */
+#define        A_MAGIC4        0405            /* overlay */
+#define        A_MAGIC5        0413            /* demand page read-only text */

 
 

-struct nlist { /* symbol table entry */
-       char            n_name[8];      /* symbol name */
-       int             n_type;         /* type flag */
-       unsigned        n_value;        /* value */
+struct relocation_info {
+         long  r_address;      /* relative to current segment */
+         long  r_symbolnum:24,
+                               /* if extern then symbol table */
+                               /* ordinal (0, 1, 2, ...) else */
+                               /* segment number (same as symbol types) */
+               r_pcrel:1,      /* if so, segment offset has already */
+                               /* been subtracted */
+               r_length:2,     /* 0=byte, 1=word, 2=long */
+               r_extern:1,     /* does not include value */
+                               /* of symbol referenced */
+               r_offset:1,     /* already includes origin */
+                               /* of this segment (?) */
+               r_pad:3;        /* nothing, yet */
+};
+struct nlist { /* symbol table entry */
+       char    n_name[8];      /* symbol name */
+       char    n_type;         /* type flag */
+       char    n_other;
+       short   n_desc;
+       unsigned n_value;       /* value */

 };
 
 };
 

-               /* values for type flag */
-#define        N_UNDF  0       /* undefined */
-#define        N_ABS   01      /* absolute */
-#define        N_TEXT  02      /* text symbol */
-#define        N_DATA  03      /* data symbol */
-#define        N_BSS   04      /* bss symbol */
+       /* values for type flag */
+#define        N_UNDF  0               /* undefined */
+#define        N_ABS   02              /* absolute */
+#define        N_TEXT  04              /* text */
+#define        N_DATA  06              /* data */
+#define        N_BSS   08

 #define        N_TYPE  037
 #define        N_TYPE  037

-#define        N_REG   024     /* register name */
-#define        N_FN    037     /* file name symbol */
-#define        N_EXT   040     /* external bit, or'ed in */
-#define        FORMAT  "%06o"  /* to print a value */
+#define        N_FN    037             /* file name symbol */
+
+#define        N_GSYM  0040            /* global sym: name,,type,0 */
+#define        N_FNAME 0042            /* procedure name (f77 kludge): name,,,0 */
+#define        N_FUN   0044            /* procedure: name,,linenumber,address */
+#define        N_STSYM 0046            /* static symbol: name,,type,address */
+#define        N_LCSYM 0048            /* .lcomm symbol: name,,type,address */
+#define        N_RSYM  0100            /* register sym: name,,register,offset */
+#define        N_SLINE 0104            /* src line: ,,linenumber,address */
+#define        N_SSYM  0140            /* structure elt: name,,type,struct_offset */
+#define        N_SO    0144            /* source file name: name,,,address */
+#define        N_LSYM  0200            /* local sym: name,,type,offset */
+#define        N_SOL   0204            /* #line source filename: name,,,address */
+#define        N_PSYM  0240            /* parameter: name,,type,offset */
+#define        N_ENTRY 0244            /* alternate entry: name,,linenumber,address */
+#define        N_LBRAC 0300            /* left bracket: ,,nesting level,address */
+#define        N_RBRAC 0340            /* right bracket: ,,nesting level,address */
+#define N_BCOMM 0342           /* begin common: name,,, */
+#define N_ECOMM 0344           /* end common: name,,, */
+#define N_ECOML 0348           /* end common (local name): ,,,address */
+#define        N_LENG  0376            /* second stab entry with length information */
+
+#define        N_EXT   01              /* external bit, or'ed in */
+
+#define        FORMAT  "%08x"
+
+#define        STABTYPES       0340