+Mon Aug 5 16:26:14 1996 Ian Lance Taylor <ian@cygnus.com>
+
+ * ldlex.l: Recognize OVERLAY.
+ * ldgram.y: Add section_phdr field to %union.
+ (section): Handle phdr_opt result. Add OVERLAY case.
+ (opt_exp_without_type): New nonterminal.
+ (phdr_opt): Return list of phdrs.
+ (overlay_section): New nonterminal.
+ * ldlang.c: Include <ctype.h>.
+ (lang_leave_output_section_statement): Add phdrs parameter.
+ Change all callers.
+ (lang_section_in_phdr): Remove.
+ (overlay_vma, overlay_lmn, overlay_max): New static variables.
+ (struct overlay_list): Define.
+ (overlay_list): New static variable.
+ (lang_enter_overlay, lang_enter_overlay_section): New functions.
+ (lang_leave_overlay_section, lang_leave_overlay): New functions.
+ * ldlang.h (lang_leave_output_section_statement): Update
+ declaration for new parameter.
+ (lang_section_in_phdr): Don't declare.
+ (lang_enter_overlay, lang_enter_overlay_section): Declare.
+ (lang_leave_overlay_section, lang_leave_overlay): Declare.
+ * ld.texinfo (Overlays): New node under SECTIONS, documenting
+ overlays.
+
+ * ldlex.l: Recognize MAX and MIN.
+ * ldgram.y (MAX, MIN): New terminals.
+ (exp): Recognize MAX and MIN.
+ * ldexp.c (fold_binary): Handle MAX and MIN.
+ * ld.texinfo (Arithmetic Functions): Document MAX and MIN.
+
+ * ld.texinfo (PHDRS): Use @cindex, not @kindex, for program header
+ index entries.
+
+ * ldgram.y (SIZEOF, ADDR): Do not specify type.
+
+ * ldcref.c (check_nocrossref): Skip symbols with no output
+ sections.
+
Fri Aug 2 14:57:49 1996 Ian Lance Taylor <ian@cygnus.com>
* ldgram.y (LOADADDR): New terminal.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GLD; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+along with GLD; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "ldfile.h"
#include "fnmatch.h"
+#include <ctype.h>
+
/* FORWARDS */
static lang_statement_union_type *new_statement PARAMS ((enum statement_enum,
size_t,
}
void
-lang_leave_output_section_statement (fill, memspec)
+lang_leave_output_section_statement (fill, memspec, phdrs)
bfd_vma fill;
- CONST char *memspec;
+ const char *memspec;
+ struct lang_output_section_phdr_list *phdrs;
{
current_section->fill = fill;
current_section->region = lang_memory_region_lookup (memspec);
+ current_section->phdrs = phdrs;
stat_ptr = &statement_list;
}
*pp = n;
}
-/* Record that a section should be placed in a phdr. */
-
-void
-lang_section_in_phdr (name)
- const char *name;
-{
- struct lang_output_section_phdr_list *n;
-
- n = ((struct lang_output_section_phdr_list *)
- stat_alloc (sizeof (struct lang_output_section_phdr_list)));
- n->name = name;
- n->used = false;
- n->next = current_section->phdrs;
- current_section->phdrs = n;
-}
-
/* Record the program header information in the output BFD. FIXME: We
should not be calling an ELF specific function here. */
/* Set notice_all so that we get informed about all symbols. */
link_info.notice_all = true;
}
+\f
+/* Overlay handling. We handle overlays with some static variables. */
+
+/* The overlay virtual address. */
+static etree_type *overlay_vma;
+
+/* The overlay load address. */
+static etree_type *overlay_lma;
+
+/* An expression for the maximum section size seen so far. */
+static etree_type *overlay_max;
+
+/* A list of all the sections in this overlay. */
+
+struct overlay_list
+{
+ struct overlay_list *next;
+ lang_output_section_statement_type *os;
+};
+
+static struct overlay_list *overlay_list;
+
+/* Start handling an overlay. */
+
+void
+lang_enter_overlay (vma_expr, lma_expr)
+ etree_type *vma_expr;
+ etree_type *lma_expr;
+{
+ /* The grammar should prevent nested overlays from occurring. */
+ ASSERT (overlay_vma == NULL
+ && overlay_lma == NULL
+ && overlay_list == NULL
+ && overlay_max == NULL);
+
+ overlay_vma = vma_expr;
+ overlay_lma = lma_expr;
+}
+
+/* Start a section in an overlay. We handle this by calling
+ lang_enter_output_section_statement with the correct VMA and LMA. */
+
+void
+lang_enter_overlay_section (name)
+ const char *name;
+{
+ struct overlay_list *n;
+ etree_type *size;
+
+ lang_enter_output_section_statement (name, overlay_vma, normal_section,
+ 0, 0, 0, overlay_lma);
+
+ /* If this is the first section, then base the VMA and LMA of future
+ sections on this one. This will work correctly even if `.' is
+ used in the addresses. */
+ if (overlay_list == NULL)
+ {
+ overlay_vma = exp_nameop (ADDR, name);
+ overlay_lma = exp_nameop (LOADADDR, name);
+ }
+
+ /* Remember the section. */
+ n = (struct overlay_list *) xmalloc (sizeof *n);
+ n->os = current_section;
+ n->next = overlay_list;
+ overlay_list = n;
+
+ size = exp_nameop (SIZEOF, name);
+
+ /* Adjust the LMA for the next section. */
+ overlay_lma = exp_binop ('+', overlay_lma, size);
+
+ /* Arrange to work out the maximum section end address. */
+ if (overlay_max == NULL)
+ overlay_max = size;
+ else
+ overlay_max = exp_binop (MAX, overlay_max, size);
+}
+
+/* Finish a section in an overlay. There isn't any special to do
+ here. */
+
+void
+lang_leave_overlay_section (fill, phdrs)
+ bfd_vma fill;
+ struct lang_output_section_phdr_list *phdrs;
+{
+ const char *name;
+ char *clean, *s2;
+ const char *s1;
+ char *buf;
+
+ name = current_section->name;
+
+ lang_leave_output_section_statement (fill, "*default*", phdrs);
+
+ /* Define the magic symbols. */
+
+ clean = xmalloc (strlen (name) + 1);
+ s2 = clean;
+ for (s1 = name; *s1 != '\0'; s1++)
+ if (isalnum (*s1) || *s1 == '_')
+ *s2++ = *s1;
+ *s2 = '\0';
+
+ buf = xmalloc (strlen (clean) + sizeof "__load_start_");
+ sprintf (buf, "__load_start_%s", clean);
+ lang_add_assignment (exp_assop ('=', buf,
+ exp_nameop (LOADADDR, name)));
+
+ 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))));
+
+ free (clean);
+}
+
+/* Finish an overlay. If there are any overlay wide settings, this
+ looks through all the sections in the overlay and sets them. */
+
+void
+lang_leave_overlay (fill, memspec, phdrs)
+ bfd_vma fill;
+ const char *memspec;
+ struct lang_output_section_phdr_list *phdrs;
+{
+ lang_memory_region_type *region;
+ struct overlay_list *l;
+ struct lang_nocrossref *nocrossref;
+
+ if (memspec == NULL)
+ region = NULL;
+ else
+ region = lang_memory_region_lookup (memspec);
+
+ nocrossref = NULL;
+
+ l = overlay_list;
+ while (l != NULL)
+ {
+ struct lang_nocrossref *nc;
+ struct overlay_list *next;
+
+ if (fill != 0 && l->os->fill == 0)
+ l->os->fill = fill;
+ if (region != NULL && l->os->region == NULL)
+ l->os->region = region;
+ if (phdrs != NULL && l->os->phdrs == NULL)
+ l->os->phdrs = phdrs;
+
+ nc = (struct lang_nocrossref *) xmalloc (sizeof *nc);
+ nc->name = l->os->name;
+ nc->next = nocrossref;
+ nocrossref = nc;
+
+ next = l->next;
+ free (l);
+ l = next;
+ }
+
+ if (nocrossref != NULL)
+ lang_add_nocrossref (nocrossref);
+
+ /* Update . for the end of the overlay. */
+ lang_add_assignment (exp_assop ('=', ".",
+ exp_binop ('+', overlay_vma, overlay_max)));
+
+ overlay_vma = NULL;
+ overlay_lma = NULL;
+ overlay_list = NULL;
+ overlay_max = NULL;
+}
projects / binutils-gdb.git / commitdiff