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* ldlang.c (lang_insert_orphan): Provide start/stop loadaddr syms
	rather than defining unconditionally.
	(lang_leave_overlay_section): Likewise.
	* ld.texinfo (Overlay Description): Update description and examples
	for start/stop syms.
ld/testsuite/
	* ld-elf/overlay.d: -u symbols we want to see in the output.
This commit is contained in:
Alan Modra 2007-03-24 06:49:03 +00:00
parent 4146fd53c0
commit 34711ca3dd
5 changed files with 33 additions and 17 deletions
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8
ld/ChangeLog
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@ -1,3 +1,11 @@
2007-03-24 Alan Modra <amodra@bigpond.net.au>
* ldlang.c (lang_insert_orphan): Provide start/stop loadaddr syms
rather than defining unconditionally.
(lang_leave_overlay_section): Likewise.
* ld.texinfo (Overlay Description): Update description and examples
for start/stop syms.
2007-03-22 Joseph Myers <joseph@codesourcery.com>
* ld.texinfo: Include VERSION_PACKAGE when reporting version.

12
ld/ld.texinfo
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@ -4030,7 +4030,7 @@ section to refer directly to another. @xref{Miscellaneous Commands,
NOCROSSREFS}.
For each section within the @code{OVERLAY}, the linker automatically
defines two symbols. The symbol @code{__load_start_@var{secname}} is
provides two symbols. The symbol @code{__load_start_@var{secname}} is
defined as the starting load address of the section. The symbol
@code{__load_stop_@var{secname}} is defined as the final load address of
the section. Any characters within @var{secname} which are not legal
@ -4055,7 +4055,7 @@ Here is an example. Remember that this would appear inside a
This will define both @samp{.text0} and @samp{.text1} to start at
address 0x1000. @samp{.text0} will be loaded at address 0x4000, and
@samp{.text1} will be loaded immediately after @samp{.text0}. The
following symbols will be defined: @code{__load_start_text0},
following symbols will be defined if referenced: @code{__load_start_text0},
@code{__load_stop_text0}, @code{__load_start_text1},
@code{__load_stop_text1}.
@ -4077,11 +4077,11 @@ example could have been written identically as follows.
@smallexample
@group
.text0 0x1000 : AT (0x4000) @{ o1/*.o(.text) @}
__load_start_text0 = LOADADDR (.text0);
__load_stop_text0 = LOADADDR (.text0) + SIZEOF (.text0);
PROVIDE (__load_start_text0 = LOADADDR (.text0));
PROVIDE (__load_stop_text0 = LOADADDR (.text0) + SIZEOF (.text0));
.text1 0x1000 : AT (0x4000 + SIZEOF (.text0)) @{ o2/*.o(.text) @}
__load_start_text1 = LOADADDR (.text1);
__load_stop_text1 = LOADADDR (.text1) + SIZEOF (.text1);
PROVIDE (__load_start_text1 = LOADADDR (.text1));
PROVIDE (__load_stop_text1 = LOADADDR (.text1) + SIZEOF (.text1));
. = 0x1000 + MAX (SIZEOF (.text0), SIZEOF (.text1));
@end group
@end smallexample

24
ld/ldlang.c
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@ -1490,8 +1490,9 @@ lang_insert_orphan (asection *s,
e_align = exp_unop (ALIGN_K,
exp_intop ((bfd_vma) 1 << s->alignment_power));
lang_add_assignment (exp_assop ('=', ".", e_align));
lang_add_assignment (exp_assop ('=', symname,
exp_nameop (NAME, ".")));
lang_add_assignment (exp_provide (symname,
exp_nameop (NAME, "."),
FALSE));
}
}
@ -1521,8 +1522,9 @@ lang_insert_orphan (asection *s,
symname = (char *) xmalloc (ps - secname + sizeof "__stop_" + 1);
symname[0] = bfd_get_symbol_leading_char (output_bfd);
sprintf (symname + (symname[0] != 0), "__stop_%s", secname);
lang_add_assignment (exp_assop ('=', symname,
exp_nameop (NAME, ".")));
lang_add_assignment (exp_provide (symname,
exp_nameop (NAME, "."),
FALSE));
}
/* Restore the global list pointer. */
@ -6436,15 +6438,17 @@ lang_leave_overlay_section (fill_type *fill,
buf = xmalloc (strlen (clean) + sizeof "__load_start_");
sprintf (buf, "__load_start_%s", clean);
lang_add_assignment (exp_assop ('=', buf,
exp_nameop (LOADADDR, name)));
lang_add_assignment (exp_provide (buf,
exp_nameop (LOADADDR, name),
FALSE));
buf = xmalloc (strlen (clean) + sizeof "__load_stop_");
sprintf (buf, "__load_stop_%s", clean);
lang_add_assignment (exp_assop ('=', buf,
exp_binop ('+',
exp_nameop (LOADADDR, name),
exp_nameop (SIZEOF, name))));
lang_add_assignment (exp_provide (buf,
exp_binop ('+',
exp_nameop (LOADADDR, name),
exp_nameop (SIZEOF, name)),
FALSE));
free (clean);
}

4
ld/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2007-03-24 Alan Modra <amodra@bigpond.net.au>
* ld-elf/overlay.d: -u symbols we want to see in the output.
2007-03-23 Alan Modra <amodra@bigpond.net.au>
* ld-spu/ovl.s (f4_a2): Tail call.

2
ld/testsuite/ld-elf/overlay.d
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@ -1,4 +1,4 @@
# ld: -T overlay.t
# ld: -T overlay.t -u __load_start_text1 -u __load_start_text2 -u __load_stop_text1 -u __load_stop_text2
#readelf: -s
#...