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Rework the R_NEG support on both gas and ld for the PowerPC AIX targets, in order to manage C++ exceptions built with GCC.

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bfd	PR binutils/21700
	* reloc.c (BFD_RELOC_PPC_NEG): New relocation.
	* bfd-in2.h: Regenerate.
	* libbfd.h: Regenerate.
	* coff-rs6000.c (_bfd_xcoff_reloc_type_lookup): Add
	BFD_RELOC_PPC_NEG handler.
	(xcoff_reloc_type_neg): Correctly substract addend.
	* coff64-rs6000.c (xcoff64_howto_table): Add R_NEG_32
	howto.
	(xcoff64_rtype2howto): Add handler for R_NEG_32.
	(xcoff64_reloc_type_lookup): Add BFD_RELOC_PPC_NEG handler.
	* xcofflink.c (xcoff_need_ldrel_p): Check output section
	for R_POS-like relocations. New argument added.
	(xcoff_mark): Adapt to new xcoff_need_ldrel_p argument.
	(xcoff_link_input_bfd): Likewise.

gas	* config/tc-ppc.c (ppc_get_csect_to_adjust): New function.
	(ppc_fix_adjustable): Manage fx_subsy part.
	(tc_gen_reloc): Create second relocation when both
	fx_addsy and fx_subsy are provided.
	* config/tc-ppc.h (RELOC_EXPANSION_POSSIBLE): New define.
	(MAX_RELOC_EXPANSION): Likewise.
	(TC_FORCE_RELOCATION_SUB_SAME): Likewise
	(UNDEFINED_DIFFERENCE_OK): Likewise
	* testsuite/gas/all/gas.exp: Skip difference between two
	undefined symbols test.

ld	* testsuite/ld-powerpc/aix52.exp: Add new test.
	* testsuite/ld-powerpc/aix-neg-reloc-32.d: New test.
	* testsuite/ld-powerpc/aix-neg-reloc-64.d: New test.
	* testsuite/ld-powerpc/aix-neg-reloc.ex: New test.
	* testsuite/ld-powerpc/aix-neg-reloc.s: New test.
This commit is contained in:
Cl?ment Chigot
2021-04-20 14:40:43 +01:00
committed by Nick Clifton
parent d549b029d6
commit c5df7e442e
16 changed files with 255 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
bfd/coff64-rs6000.c
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@@ -1320,7 +1320,21 @@ reloc_howto_type xcoff64_howto_table[] =
MINUS_ONE, /* dst_mask */
false), /* pcrel_offset */
EMPTY_HOWTO(0x26),
/* 0x26: 32 bit relocation, but store negative value. */
HOWTO (R_NEG, /* type */
0, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_NEG_32", /* name */
true, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
false), /* pcrel_offset */
EMPTY_HOWTO(0x27),
EMPTY_HOWTO(0x28),
EMPTY_HOWTO(0x29),
@@ -1386,6 +1400,9 @@ xcoff64_rtype2howto (arelent *relent, struct internal_reloc *internal)
{
if (R_POS == internal->r_type)
relent->howto = &xcoff64_howto_table[0x1c];
if (R_NEG == internal->r_type)
relent->howto = &xcoff64_howto_table[0x26];
}
/* The r_size field of an XCOFF reloc encodes the bitsize of the
@@ -1426,6 +1443,8 @@ xcoff64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
return &xcoff64_howto_table[0];
case BFD_RELOC_NONE:
return &xcoff64_howto_table[0xf];
case BFD_RELOC_PPC_NEG:
return &xcoff64_howto_table[0x1];
case BFD_RELOC_PPC64_TLSGD:
return &xcoff64_howto_table[0x20];
case BFD_RELOC_PPC64_TLSIE: