+2014-10-04 Alan Modra <amodra@gmail.com>
+
+ PR 17447
+ * elf-bfd.h (struct eh_cie_fde): Comment re NULL u.fde.cie_inf.
+ * elf-eh-frame.c (_bfd_elf_parse_eh_frame): Mark zero address
+ range FDEs for discarding.
+ (vma_compare): Sort on range after address.
+ (_bfd_elf_gc_mark_fdes): Test for NULL u.fde.cie_inf.
+ (_bfd_elf_discard_section_eh_frame): Likewise. Write "FDE" in
+ error message rather than "fde".
+ (_bfd_elf_write_section_eh_frame_hdr): Write "PC" and "FDE" in
+ error message.
+
2014-09-29 H.J. Lu <hongjiu.lu@intel.com>
PR ld/17440
If REMOVED == 0, this is the CIE that we have chosen to use for
the output FDE. The CIE's REMOVED field is also 0, but the CIE
- might belong to a different .eh_frame input section from the FDE. */
+ might belong to a different .eh_frame input section from the FDE.
+
+ May be NULL to signify that the FDE should be discarded. */
struct eh_cie_fde *cie_inf;
struct eh_cie_fde *next_for_section;
} fde;
length = get_DW_EH_PE_width (cie->fde_encoding, ptr_size);
REQUIRE (skip_bytes (&buf, end, 2 * length));
+ SKIP_RELOCS (buf - length);
+ if (!GET_RELOC (buf - length)
+ && read_value (abfd, buf - length, length, FALSE) == 0)
+ {
+ (*info->callbacks->minfo)
+ (_("discarding zero address range FDE in %B(%A).\n"),
+ abfd, sec);
+ this_inf->u.fde.cie_inf = NULL;
+ }
+
/* Skip the augmentation size, if present. */
if (cie->augmentation[0] == 'z')
REQUIRE (read_uleb128 (&buf, end, &length));
/* At this stage, all cie_inf fields point to local CIEs, so we
can use the same cookie to refer to them. */
cie = fde->u.fde.cie_inf;
- if (!cie->u.cie.gc_mark)
+ if (cie != NULL && !cie->u.cie.gc_mark)
{
cie->u.cie.gc_mark = 1;
if (!mark_entry (info, eh_frame, cie, gc_mark_hook, cookie))
/* There should only be one zero terminator, on the last input
file supplying .eh_frame (crtend.o). Remove any others. */
ent->removed = sec->map_head.s != NULL;
- else if (!ent->cie)
+ else if (!ent->cie && ent->u.fde.cie_inf != NULL)
{
bfd_boolean keep;
if ((sec->flags & SEC_LINKER_CREATED) != 0 && cookie->rels == NULL)
since it is affected by runtime relocations. */
hdr_info->table = FALSE;
(*info->callbacks->einfo)
- (_("%P: fde encoding in %B(%A) prevents .eh_frame_hdr"
+ (_("%P: FDE encoding in %B(%A) prevents .eh_frame_hdr"
" table being created.\n"), abfd, sec);
}
ent->removed = 0;
return 1;
if (p->initial_loc < q->initial_loc)
return -1;
+ if (p->range > q->range)
+ return 1;
+ if (p->range < q->range)
+ return -1;
return 0;
}
&& (hdr_info->array[i].initial_loc
!= sec->output_section->vma + val))
(*info->callbacks->einfo)
- (_("%X%P: .eh_frame_hdr table[%u] pc overflow.\n"), i);
+ (_("%X%P: .eh_frame_hdr table[%u] PC overflow.\n"), i);
bfd_put_32 (abfd, val, contents + EH_FRAME_HDR_SIZE + i * 8 + 4);
val = hdr_info->array[i].fde - sec->output_section->vma;
&& (hdr_info->array[i].fde
!= sec->output_section->vma + val))
(*info->callbacks->einfo)
- (_("%X%P: .eh_frame_hdr table[%u] fde overflow.\n"), i);
+ (_("%X%P: .eh_frame_hdr table[%u] FDE overflow.\n"), i);
bfd_put_32 (abfd, val, contents + EH_FRAME_HDR_SIZE + i * 8 + 8);
if (i != 0
+2014-10-04 Alan Modra <amodra@gmail.com>
+
+ * ld-elf/eh1.s: Don't create FDEs with zero address ranges.
+ * ld-elf/eh3.s: Likewise.
+ * ld-elf/eh1.d, * ld-elf/eh2.d, * ld-elf/eh3.d: Adjust.
+ * ld-mips-elf/eh-frame1-n32.d: Warning match update.
+ * ld-mips-elf/eh-frame1-n64.d: Likewise.
+ * ld-mips-elf/eh-frame2-n32.d: Likewise.
+ * ld-mips-elf/eh-frame2-n64.d: Likewise.
+
2014-09-22 Alan Modra <amodra@gmail.com>
* ld-plugin/lto.exp: Use both --print-file-name and --print-prog-name
2014-06-09 Ryan Mansfield <rmansfield@qnx.com>
- * config/default.exp (GASP): Remove.
+ * config/default.exp (GASP): Remove.
2014-06-03 Alan Modra <amodra@gmail.com>
DW_CFA_nop
DW_CFA_nop
-0+0018 0+001c 0+001c FDE cie=0+0000 pc=0+400078..0+400078
- DW_CFA_advance_loc: 0 to 0+400078
+0+0018 0+001c 0+001c FDE cie=0+0000 pc=0+400078\.\.0+400090
+ DW_CFA_advance_loc: 8 to 0+400080
DW_CFA_def_cfa_offset: 16
DW_CFA_offset: r6 \(rbp\) at cfa-16
- DW_CFA_advance_loc: 0 to 0+400078
+ DW_CFA_advance_loc: 8 to 0+400088
DW_CFA_def_cfa_register: r6 \(rbp\)
0+0038 ZERO terminator
.type _start, %function
_start:
.LFB2:
+ .space 8
.LCFI0:
+ .space 8
.LCFI1:
+ .space 8
.LFE2:
.size _start, .-_start
.section .eh_frame,"a",%progbits
DW_CFA_nop
DW_CFA_nop
-0+0018 0+001c 0+001c FDE cie=0+0000 pc=0+400078..0+400078
- DW_CFA_advance_loc: 0 to 0+400078
+0+0018 0+001c 0+001c FDE cie=0+0000 pc=0+400078\.\.0+400090
+ DW_CFA_advance_loc: 8 to 0+400080
DW_CFA_def_cfa_offset: 16
DW_CFA_offset: r6 \(rbp\) at cfa-16
- DW_CFA_advance_loc: 0 to 0+400078
+ DW_CFA_advance_loc: 8 to 0+400088
DW_CFA_def_cfa_register: r6 \(rbp\)
0+0038 ZERO terminator
DW_CFA_nop
DW_CFA_nop
-0+0018 0+001c 0+001c FDE cie=0+0000 pc=0+400078..0+400078
- DW_CFA_advance_loc: 0 to 0+400078
+0+0018 0+001c 0+001c FDE cie=0+0000 pc=0+400078\.\.0+400090
+ DW_CFA_advance_loc: 8 to 0+400080
DW_CFA_def_cfa_offset: 16
DW_CFA_offset: r6 \(rbp\) at cfa-16
- DW_CFA_advance_loc: 0 to 0+400078
+ DW_CFA_advance_loc: 8 to 0+400088
DW_CFA_def_cfa_register: r6 \(rbp\)
0+0038 ZERO terminator
.type _start, %function
_start:
.LFB2:
+ .space 8
.LCFI0:
+ .space 8
.LCFI1:
+ .space 8
.LFE2:
.size _start, .-_start
.section .eh_frame,"a",%progbits
#as: -march=from-abi -EB -n32 --defsym alignment=2 --defsym fill=0x40
#readelf: --relocs -wf
#ld: -shared -melf32btsmipn32 -Teh-frame1.ld
-#warning: fde encoding in.*prevents \.eh_frame_hdr table being created.
+#warning: FDE encoding in.*prevents \.eh_frame_hdr table being created.
Relocation section '\.rel\.dyn' .*:
*Offset .*
#as: -march=from-abi -EB -64 --defsym alignment=3 --defsym fill=0x40
#readelf: --relocs -wf
#ld: -shared -melf64btsmip -Teh-frame1.ld
-#warning: fde encoding in.*prevents \.eh_frame_hdr table being created.
+#warning: FDE encoding in.*prevents \.eh_frame_hdr table being created.
Relocation section '\.rel\.dyn' .*:
*Offset .*
#as: -march=from-abi -EB -n32 --defsym alignment=2 --defsym fill=0
#readelf: --relocs -wf
#ld: -shared -melf32btsmipn32 -Teh-frame1.ld
-#warning: fde encoding in.*prevents \.eh_frame_hdr table being created.
+#warning: FDE encoding in.*prevents \.eh_frame_hdr table being created.
Relocation section '\.rel\.dyn' .*:
*Offset .*
#as: -march=from-abi -EB -64 --defsym alignment=3 --defsym fill=0
#readelf: --relocs -wf
#ld: -shared -melf64btsmip -Teh-frame1.ld
-#warning: fde encoding in.*prevents \.eh_frame_hdr table being created.
+#warning: FDE encoding in.*prevents \.eh_frame_hdr table being created.
Relocation section '\.rel\.dyn' .*:
*Offset .*
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