+Thu Nov 21 21:01:05 1991 Per Bothner (bothner at cygnus.com)
+
+ * stab.def: Remove the GNU extended type codes (e.g. N_SETT).
+ * aout64.h: The heuristic for distinguishing between
+ sunos-style and bsd-style ZMAGIC files (wrt. where the
+ text segment starts) is moved into (the default definition of)
+ the macro N_HEADER_IN_TEXT. This definition is only used
+ if no other definition is used - e.g. bfd/newsos3.c defines
+ N_HEADER_IN_TEXT(x) to be always 0 (as before).
+
Thu Nov 21 11:53:03 1991 John Gilmore (gnu at cygnus.com)
* aout64.h (N_TXTADDR, N_TXTOFF, N_TXTSIZE): New definitions
* entry point below TEXT_START_ADDR:
(hack for SunOS shared libraries)
start at 0, offset is 0, size as stated.
- * entry point is EXEC_BYTES_SIZE or further into a page:
- (no padding is needed; text can start after exec header. Sun
+ * If N_HEADER_IN_TEXT(x) is true (which defaults to being the
+ case when the entry point is EXEC_BYTES_SIZE or further into a page):
+ no padding is needed; text can start after exec header. Sun
considers the text segment of such files to include the exec header;
- for BFD's purposes, we don't, which makes more work for us.)
+ for BFD's purposes, we don't, which makes more work for us.
start at TEXT_START_ADDR + EXEC_BYTES_SIZE, offset is EXEC_BYTES_SIZE,
size as stated minus EXEC_BYTES_SIZE.
- * entry point is less than EXEC_BYTES_SIZE into a page (e.g. page aligned):
- (padding is needed so that text can start at a page boundary)
- start at TEXT_START_ADDR, offset PAGE_SIZE, size as stated. */
+ * If N_HEADER_IN_TEXT(x) is false (which defaults to being the case when
+ the entry point is less than EXEC_BYTES_SIZE into a page (e.g. page
+ aligned)): (padding is needed so that text can start at a page boundary)
+ start at TEXT_START_ADDR, offset PAGE_SIZE, size as stated.
+
+ Specific configurations may want to hardwire N_HEADER_IN_TEXT,
+ for efficiency or to allow people to play games with the entry point.
+ In that case, you would #define N_HEADER_IN_TEXT(x) as 1 for sunos,
+ and as 0 for most other hosts (Sony News, Vax Ultrix, etc).
+ (Do this in the appropriate bfd target file.)
+ (The default is a heuristic that will break if people try changing
+ the entry point, perhaps with the ld -e flag.)
+ */
+
+#ifndef N_HEADER_IN_TEXT
+#define N_HEADER_IN_TEXT(x) (((x).a_entry & (PAGE_SIZE-1)) >= EXEC_BYTES_SIZE)
+#endif
#ifndef N_TXTADDR
#define N_TXTADDR(x) \
0: /* object file or NMAGIC */\
((x).a_entry < TEXT_START_ADDR)? \
0: /* shared lib */\
- ( (((x).a_entry & (PAGE_SIZE-1)) >= EXEC_BYTES_SIZE) ? \
+ (N_HEADER_IN_TEXT(x) ? \
TEXT_START_ADDR + EXEC_BYTES_SIZE: /* no padding */\
TEXT_START_ADDR /* a page of padding */\
) \
EXEC_BYTES_SIZE: /* object file or NMAGIC */\
((x).a_entry < TEXT_START_ADDR)? \
0: /* shared lib */\
- ( (((x).a_entry & (PAGE_SIZE-1)) >= EXEC_BYTES_SIZE) ? \
+ (N_HEADER_IN_TEXT(x) ? \
EXEC_BYTES_SIZE: /* no padding */\
PAGE_SIZE /* a page of padding */\
) \
(x).a_text: /* object file or NMAGIC */\
((x).a_entry < TEXT_START_ADDR)? \
(x).a_text: /* shared lib */\
- ( (((x).a_entry & (PAGE_SIZE-1)) >= EXEC_BYTES_SIZE) ? \
+ (N_HEADER_IN_TEXT(x) ? \
(x).a_text - EXEC_BYTES_SIZE: /* no padding */\
(x).a_text /* a page of padding */\
) \
PROTO(int, bfd_decode_symclass, (asymbol *symbol));
-/*
-
- bfd_stab_name
-Returns a string for the stab with the given code, or NULL if not found.
-*/
-
- PROTO(char *, bfd_stab_name, (int code));
-
/*
*/
The value is the length. */
__define_stab (N_LENG, 0xfe, "LENG")
-#ifdef GNU_EXTRA_STABS
-/* These are defined in a.out.gnu.h, so they are usually left out here. */
-
-/* The following symbols refer to set elements.
- All the N_SET[ATDB] symbols with the same name form one set.
- Space is allocated for the set in the text section, and each set
- element's value is stored into one word of the space.
- The first word of the space is the length of the set (number of elements).
-
- The address of the set is made into an N_SETV symbol
- whose name is the same as the name of the set.
- This symbol acts like a N_DATA global symbol
- in that it can satisfy undefined external references. */
-
-/* These appear as input to LD, in a .o file. */
-__define_stab (N_SETA, 0x14, "SETA") /* Absolute set element symbol */
-__define_stab (N_SETT, 0x16, "SETT") /* Text set element symbol */
-__define_stab (N_SETD, 0x18, "SETD") /* Data set element symbol */
-__define_stab (N_SETB, 0x1A, "SETB") /* Bss set element symbol */
-
-/* This is output from LD. */
-__define_stab (N_SETV, 0x1C, "SETV") /* Pointer to set vector in data area. */
-
-/* The following type indicates the definition of a symbol as being
- an indirect reference to another symbol. The other symbol
- appears as an undefined reference, immediately following this symbol.
-
- Indirection is asymmetrical. The other symbol's value will be used
- to satisfy requests for the indirect symbol, but not vice versa.
- If the other symbol does not have a definition, libraries will
- be searched to find a definition. */
-
-__define_stab (N_INDR, 0xa, "INDR")
-
-/* Warning symbol. The text gives a warning message, the next symbol
- in the table will be undefined. When the symbol is referenced, the
- message is printed. */
-
-__define_stab (N_WARNING, 0x1e, "WARNING")
-#endif
\f
/* The above information, in matrix format.
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