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* ld.h (DISCARD_SECTION_NAME): Define to "/DISCARD/".

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* ldlang.c (init_os): Fail on an attempt to initialize any section
	named DISCARD_SECTION_NAME.
	(wild_doit): Discard input sections assigned to an output section
	named DISCARD_SECTION_NAME.
	* ld.texinfo: Document use of /DISCARD/.
This commit is contained in:
Ian Lance Taylor
1996-03-27 18:17:28 +00:00
parent 64664e69cb
commit cf2e4f5fde
3 changed files with 34 additions and 9 deletions
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26
ld/ldlang.c
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@@ -603,10 +603,13 @@ static void
init_os (s)
lang_output_section_statement_type * s;
{
/* asection *section = bfd_get_section_by_name(output_bfd, s->name);*/
section_userdata_type *new =
(section_userdata_type *)
stat_alloc (sizeof (section_userdata_type));
section_userdata_type *new;
if (strcmp (s->name, DISCARD_SECTION_NAME) == 0)
einfo ("%P%F: Illegal use of `%s' section", DISCARD_SECTION_NAME);
new = ((section_userdata_type *)
stat_alloc (sizeof (section_userdata_type)));
s->bfd_section = bfd_get_section_by_name (output_bfd, s->name);
if (s->bfd_section == (asection *) NULL)
@@ -622,7 +625,6 @@ init_os (s)
/* vma to allow us to output a section through itself */
s->bfd_section->output_offset = 0;
get_userdata (s->bfd_section) = (PTR) new;
}
/* The wild routines.
@@ -642,6 +644,18 @@ wild_doit (ptr, section, output, file)
lang_output_section_statement_type *output;
lang_input_statement_type *file;
{
/* Input sections which are assigned to a section named
DISCARD_SECTION_NAME are discarded. */
if (strcmp (output->name, DISCARD_SECTION_NAME) == 0)
{
if (section != NULL && section->output_section == NULL)
{
/* This prevents future calls from assigning this section. */
section->output_section = bfd_abs_section_ptr;
}
return;
}
if (output->bfd_section == NULL)
init_os (output);
@@ -673,7 +687,7 @@ wild_doit (ptr, section, output, file)
if (section->alignment_power > output->bfd_section->alignment_power)
output->bfd_section->alignment_power = section->alignment_power;
/* If supplied an aligment, then force it */
/* If supplied an aligment, then force it. */
if (output->section_alignment != -1)
output->bfd_section->alignment_power = output->section_alignment;
}