2011-08-08 Tristan Gingold <gingold@adacore.com>
* config/obj-macho.c (obj_mach_o_section): New function. (struct known_section): New type. (known_sections): Declare. (obj_mach_o_known_section): New function. (obj_mach_o_common_parse): Ditto. (obj_mach_o_comm): Ditto. (obj_mach_o_subsections_via_symbols): Ditto. (mach_o_pseudo_table): Add new pseudos.
This commit is contained in:
Tristan Gingold
parent
f1bde64c90
commit
74a6005fea
2 changed files with 265 additions and 1 deletions
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@ -1,3 +1,14 @@
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2011-08-08 Tristan Gingold <gingold@adacore.com>
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* config/obj-macho.c (obj_mach_o_section): New function.
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(struct known_section): New type.
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(known_sections): Declare.
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(obj_mach_o_known_section): New function.
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(obj_mach_o_common_parse): Ditto.
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(obj_mach_o_comm): Ditto.
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(obj_mach_o_subsections_via_symbols): Ditto.
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(mach_o_pseudo_table): Add new pseudos.
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2011-08-06 Richard Henderson <rth@redhat.com>
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* dw2gencfi.c (all_fde_data): Export.
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@ -21,7 +21,11 @@
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#define OBJ_HEADER "obj-macho.h"
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#include "as.h"
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#include "subsegs.h"
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#include "symbols.h"
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#include "write.h"
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#include "mach-o.h"
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#include "mach-o/loader.h"
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static void
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obj_mach_o_weak (int ignore ATTRIBUTE_UNUSED)
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@ -49,9 +53,258 @@ obj_mach_o_weak (int ignore ATTRIBUTE_UNUSED)
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demand_empty_rest_of_line ();
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}
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/* Parse:
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.section segname,sectname[,type[,attribute[,sizeof_stub]]]
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*/
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static void
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obj_mach_o_section (int ignore ATTRIBUTE_UNUSED)
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{
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char *p;
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char *segname;
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char *sectname;
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char c;
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int sectype = BFD_MACH_O_S_REGULAR;
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unsigned int secattr = 0;
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offsetT sizeof_stub = 0;
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const char *name;
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flagword oldflags, flags;
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asection *sec;
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/* Parse segment name. */
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if (!is_name_beginner (*input_line_pointer))
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{
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as_bad (_("missing segment name"));
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ignore_rest_of_line ();
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return;
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}
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p = input_line_pointer;
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c = get_symbol_end ();
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segname = alloca (input_line_pointer - p + 1);
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strcpy (segname, p);
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*input_line_pointer = c;
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if (*input_line_pointer != ',')
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{
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as_bad (_("missing comma after segment name"));
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ignore_rest_of_line ();
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return;
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}
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input_line_pointer++;
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/* Parse section name. */
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if (!is_name_beginner (*input_line_pointer))
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{
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as_bad (_("missing section name"));
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ignore_rest_of_line ();
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return;
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}
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p = input_line_pointer;
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c = get_symbol_end ();
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sectname = alloca (input_line_pointer - p + 1);
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strcpy (sectname, p);
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*input_line_pointer = c;
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/* Parse type. */
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if (*input_line_pointer == ',')
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{
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input_line_pointer++;
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if (!is_name_beginner (*input_line_pointer))
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{
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as_bad (_("missing section type name"));
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ignore_rest_of_line ();
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return;
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}
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p = input_line_pointer;
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c = get_symbol_end ();
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sectype = bfd_mach_o_get_section_type_from_name (p);
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if (sectype == -1)
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{
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as_bad (_("unknown or invalid section type '%s'"), p);
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sectype = BFD_MACH_O_S_REGULAR;
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}
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*input_line_pointer = c;
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/* Parse attributes. */
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if (*input_line_pointer == ',')
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{
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do
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{
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int attr;
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input_line_pointer++;
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if (!is_name_beginner (*input_line_pointer))
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{
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as_bad (_("missing section attribute identifier"));
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ignore_rest_of_line ();
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break;
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}
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p = input_line_pointer;
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c = get_symbol_end ();
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attr = bfd_mach_o_get_section_attribute_from_name (p);
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if (attr == -1)
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as_bad (_("unknown or invalid section attribute '%s'"), p);
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else
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secattr |= attr;
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*input_line_pointer = c;
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}
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while (*input_line_pointer == '+');
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/* Parse sizeof_stub. */
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if (*input_line_pointer == ',')
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{
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if (sectype != BFD_MACH_O_S_SYMBOL_STUBS)
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as_bad (_("unexpected sizeof_stub expression"));
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sizeof_stub = get_absolute_expression ();
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}
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else if (sectype == BFD_MACH_O_S_SYMBOL_STUBS)
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as_bad (_("missing sizeof_stub expression"));
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}
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}
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demand_empty_rest_of_line ();
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bfd_mach_o_normalize_section_name (segname, sectname, &name, &flags);
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if (name == NULL)
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{
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/* There is no normal BFD section name for this section. Create one.
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The name created doesn't really matter as it will never be written
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on disk. */
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size_t seglen = strlen (segname);
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size_t sectlen = strlen (sectname);
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char *n;
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n = xmalloc (seglen + 1 + sectlen + 1);
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memcpy (n, segname, seglen);
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n[seglen] = '.';
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memcpy (n + seglen + 1, sectname, sectlen);
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n[seglen + 1 + sectlen] = 0;
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name = n;
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}
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#ifdef md_flush_pending_output
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md_flush_pending_output ();
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#endif
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/* Sub-segments don't exists as is on Mach-O. */
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sec = subseg_new (name, 0);
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oldflags = bfd_get_section_flags (stdoutput, sec);
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if (oldflags == SEC_NO_FLAGS)
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{
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bfd_mach_o_section *msect;
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if (! bfd_set_section_flags (stdoutput, sec, flags))
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as_warn (_("error setting flags for \"%s\": %s"),
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bfd_section_name (stdoutput, sec),
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bfd_errmsg (bfd_get_error ()));
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msect = bfd_mach_o_get_mach_o_section (sec);
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strncpy (msect->segname, segname, sizeof (msect->segname));
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msect->segname[16] = 0;
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strncpy (msect->sectname, sectname, sizeof (msect->sectname));
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msect->sectname[16] = 0;
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msect->flags = secattr | sectype;
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msect->reserved2 = sizeof_stub;
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}
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else if (flags != SEC_NO_FLAGS)
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{
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if (flags != oldflags)
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as_warn (_("Ignoring changed section attributes for %s"), name);
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}
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}
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struct known_section
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{
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const char *name;
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unsigned int flags;
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};
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static const struct known_section known_sections[] =
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{
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/* 0 */ { NULL, 0},
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/* 1 */ { ".cstring", BFD_MACH_O_S_CSTRING_LITERALS }
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};
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static void
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obj_mach_o_known_section (int sect_index)
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{
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const struct known_section *sect = &known_sections[sect_index];
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asection *old_sec;
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segT sec;
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#ifdef md_flush_pending_output
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md_flush_pending_output ();
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#endif
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old_sec = bfd_get_section_by_name (stdoutput, sect->name);
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if (old_sec)
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{
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/* Section already present. */
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sec = old_sec;
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subseg_set (sec, 0);
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}
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else
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{
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bfd_mach_o_section *msect;
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sec = subseg_force_new (sect->name, 0);
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/* Set default flags. */
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msect = bfd_mach_o_get_mach_o_section (sec);
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msect->flags = sect->flags;
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}
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}
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/* Called from read.c:s_comm after we've parsed .comm symbol, size.
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Parse a possible alignment value. */
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static symbolS *
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obj_mach_o_common_parse (int ignore ATTRIBUTE_UNUSED,
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symbolS *symbolP, addressT size)
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{
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addressT align = 0;
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if (*input_line_pointer == ',')
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{
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align = parse_align (0);
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if (align == (addressT) -1)
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return NULL;
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}
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S_SET_VALUE (symbolP, size);
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S_SET_EXTERNAL (symbolP);
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S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
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symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
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return symbolP;
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}
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static void
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obj_mach_o_comm (int ignore ATTRIBUTE_UNUSED)
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{
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s_comm_internal (ignore, obj_mach_o_common_parse);
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}
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static void
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obj_mach_o_subsections_via_symbols (int arg ATTRIBUTE_UNUSED)
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{
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/* Currently ignore it. */
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demand_empty_rest_of_line ();
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}
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const pseudo_typeS mach_o_pseudo_table[] =
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{
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{"weak", obj_mach_o_weak, 0},
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{ "weak", obj_mach_o_weak, 0},
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{ "section", obj_mach_o_section, 0},
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{ "cstring", obj_mach_o_known_section, 1},
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{ "lcomm", s_lcomm, 1 },
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{ "comm", obj_mach_o_comm, 0 },
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{ "subsections_via_symbols", obj_mach_o_subsections_via_symbols, 0 },
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{NULL, NULL, 0}
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};
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