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adjust mach-o default GAS sections.
gas: * as.c (perform_an_assembly_pass): Do not create text, data and bss sections for MACH-O. Do not switch to the text section. * config/obj-macho.c (obj_mach_o_segT_from_bfd_name): Forward decl. (mach_o_begin): Startup with only text section unless suppressed. * config/obj-macho.h (obj_begin): define to mach_o_begin (). gas/testsuite: * gas/mach-o/sections-1.d: Amend to recognize that bss is not emitted by default. * gas/mach-o/sections-2.d: New.
This commit is contained in:
Iain Sandoe
parent
3362e0d9fb
commit
bcf0aac6f6
@ -1,3 +1,11 @@
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2011-12-29 Iain Sandoe <idsandoe@googlemail.com>
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* as.c (perform_an_assembly_pass): Do not create text, data and bss
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sections for MACH-O. Do not switch to the text section.
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* config/obj-macho.c (obj_mach_o_segT_from_bfd_name): Forward decl.
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(mach_o_begin): Startup with only text section unless suppressed.
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* config/obj-macho.h (obj_begin): define to mach_o_begin ().
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2011-12-22 DJ Delorie <dj@redhat.com>
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* config/rl78-defs.h (rl78_linkrelax_addr16): Add.
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6
gas/as.c
6
gas/as.c
@ -1037,10 +1037,13 @@ static void
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perform_an_assembly_pass (int argc, char ** argv)
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{
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int saw_a_file = 0;
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#ifndef OBJ_MACH_O
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flagword applicable;
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#endif
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need_pass_2 = 0;
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#ifndef OBJ_MACH_O
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/* Create the standard sections, and those the assembler uses
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internally. */
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text_section = subseg_new (TEXT_SECTION_NAME, 0);
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@ -1057,12 +1060,15 @@ perform_an_assembly_pass (int argc, char ** argv)
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| SEC_DATA));
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bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
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seg_info (bss_section)->bss = 1;
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#endif
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subseg_new (BFD_ABS_SECTION_NAME, 0);
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subseg_new (BFD_UND_SECTION_NAME, 0);
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reg_section = subseg_new ("*GAS `reg' section*", 0);
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expr_section = subseg_new ("*GAS `expr' section*", 0);
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#ifndef OBJ_MACH_O
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subseg_set (text_section, 0);
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#endif
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/* This may add symbol table entries, which requires having an open BFD,
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and sections already created. */
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@ -45,13 +45,40 @@
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#include "mach-o/loader.h"
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#include "obj-macho.h"
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/* Forward decl. */
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static segT obj_mach_o_segT_from_bfd_name (const char *nam, int must_succeed);
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/* TODO: Implement "-dynamic"/"-static" command line options. */
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static int obj_mach_o_is_static;
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/* TODO: Implement the "-n" command line option to suppress the initial
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switch to the text segment. */
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static int obj_mach_o_start_with_text_section = 1;
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/* Allow for special re-ordering on output. */
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static int seen_objc_section;
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static int obj_mach_o_seen_objc_section;
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/* Start-up: At present, just create the sections we want. */
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void
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mach_o_begin (void)
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{
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/* Mach-O only defines the .text section by default, and even this can
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be suppressed by a flag. In the latter event, the first code MUST
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be a section definition. */
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if (obj_mach_o_start_with_text_section)
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{
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text_section = obj_mach_o_segT_from_bfd_name (TEXT_SECTION_NAME, 1);
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subseg_set (text_section, 0);
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if (obj_mach_o_is_static)
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{
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bfd_mach_o_section *mo_sec
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= bfd_mach_o_get_mach_o_section (text_section);
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mo_sec->flags &= ~BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS;
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}
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}
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}
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/* Remember the subsections_by_symbols state in case we need to reset
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the file flags. */
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@ -473,8 +500,9 @@ obj_mach_o_objc_section (int sect_index)
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section = obj_mach_o_segT_from_bfd_name (objc_sections[sect_index], 1);
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if (section != NULL)
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{
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seen_objc_section = 1; /* We need to ensure that certain sections are
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present and in the right order. */
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obj_mach_o_seen_objc_section = 1; /* We need to ensure that certain
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sections are present and in the
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right order. */
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subseg_set (section, 0);
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}
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@ -30,6 +30,10 @@
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#define OUTPUT_FLAVOR bfd_target_mach_o_flavour
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/* We want to control how the sections are pre-defined on startup. */
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#define obj_begin() mach_o_begin ()
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extern void mach_o_begin (void);
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/* All our align expressions are power of two. */
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#define USE_ALIGN_PTWO
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@ -1,3 +1,9 @@
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2011-12-29 Iain Sandoe <idsandoe@googlemail.com>
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* gas/mach-o/sections-1.d: Amend to recognize that bss is not emitted
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by default.
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* gas/mach-o/sections-2.d: New.
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2011-12-19 Iain Sandoe <idsandoe@googlemail.com>
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* gas/mach-o/err-sections-1.s: New.
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@ -11,11 +11,6 @@
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align: 0 nreloc: 0 reloff: (00000000)?00000000
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flags: 00000000 \(type: regular attr: -\)
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reserved1: 0x0 reserved2: 0x0 reserved3: 0x0
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Section: __bss __DATA \(bfdname: .bss\)
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addr: (00000000)?00000000 size: (00000000)?00000000 offset: (00000000)?00000000
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align: 0 nreloc: 0 reloff: (00000000)?00000000
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flags: 00000001 \(type: zerofill attr: -\)
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reserved1: 0x0 reserved2: 0x0 reserved3: 0x0
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Section: __textcoal_nt __TEXT \(bfdname: __TEXT.__textcoal_nt\)
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addr: (00000000)?00000000 size: (00000000)?00000000 offset: (00000000)?00000000
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align: 0 nreloc: 0 reloff: (00000000)?00000000
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14
gas/testsuite/gas/mach-o/sections-2.d
Normal file
14
gas/testsuite/gas/mach-o/sections-2.d
Normal file
@ -0,0 +1,14 @@
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#objdump: -h
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#source: empty.s
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# we should only see a text section by default.
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.*: +file format mach-o.*
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#...
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Idx Name.*
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0 .text.*
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.*
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#failif
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1 .data.*
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.*
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2 .bss.*
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.*
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