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| author | Alan Modra <amodra@gmail.com> | 2018-08-21 11:54:29 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2018-08-21 14:59:53 +0930 |
| commit | 706704c88344314646e4edcc0840cb18a9cb4c82 (patch) | |
| tree | ae2cd087b3be38471edaa968d45fccaf026fa886 /bfd/vms-alpha.c | |
| parent | 487096bf0bd5499b1d23ecbe5fd64f9f0079c0b5 (diff) | |
| download | gdb-706704c88344314646e4edcc0840cb18a9cb4c82.zip gdb-706704c88344314646e4edcc0840cb18a9cb4c82.tar.gz gdb-706704c88344314646e4edcc0840cb18a9cb4c82.tar.bz2 | |
Pack reloc_howto_struct
This patch uses bitfields in reloc_howto_struct, reducing its size
from 80 to 40 bytes on 64-bit hosts and from 52 to 32 bytes on 32-bit
hosts (with a 32-bit bfd_vma). I've also added a new "negate" field
rather than making the encoded "size" field do double duty as both
a size and a flag.
There was just one use of an encoded size of 8, which according to
bfd_get_reloc_size meant 16 bytes, in vms-alpha.c ALPHA_R_LINKAGE.
See git commit c3d8e071bf adding ALPHA_R_LINKAGE and git commit
8612a388f7 decoding size 8 in bfd_get_reloc_size. Since no other part
of BFD handles 16 byte relocs, I've removed that encoding and special
cased the ALPHA_R_LINKAGE size in vms-alpha.c.
* reloc.c (reloc_howto_type): Typedef.
(bfd_symbol): Delete forward declaration.
(struct reloc_howto_struct): Add "negate" field. Make "size",
"bitsize", "rightshift", "bitpos", "complain_on_overflow",
"pc_relative", "partial_inplace", and "pcrel_offset" bitfields.
Rearrange for better packing. Revise comments.
(HOWTO): Map to rearranged reloc_howto_struct.
(bfd_get_reloc_size): Delete now unused cases.
(read_reloc, write_reloc): Likewise.
(apply_reloc, _bfd_relocate_contents): Test howto->negate
rather than howto->size < 0 for negated relocation values.
* coff-rs6000.c (xcoff_complain_overflow_bitfield_func): Avoid
signed/unsigned warning.
(xcoff_ppc_relocate_section): Delete "condition is always false"
code.
* coff64-rs6000.c (xcoff64_ppc_relocate_section): Likewise.
* cpu-ns32k.c (do_ns32k_reloc): Adjust to suit reloc_howto_struct
changes.
* vms-alpha.c (_bfd_vms_write_etir, alpha_vms_slurp_relocs): Use
size 16 for ALPHA_R_LINKAGE.
(alpha_howto_table <ALPHA_R_LINKAGE>): Set encoded size and
bitsize to zero.
* bfd-in.h (reloc_howto_type): Delete.
* bfd-in2.h: Regenerate.
Diffstat (limited to 'bfd/vms-alpha.c')
| -rw-r--r-- | bfd/vms-alpha.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/bfd/vms-alpha.c b/bfd/vms-alpha.c index fc45260..8f22a31 100644 --- a/bfd/vms-alpha.c +++ b/bfd/vms-alpha.c @@ -4001,6 +4001,7 @@ _bfd_vms_write_etir (bfd * abfd, int objtype ATTRIBUTE_UNUSED) break; case ALPHA_R_LINKAGE: + size = 16; etir_output_check (abfd, section, curr_addr, 64); _bfd_vms_output_begin_subrec (recwr, ETIR__C_STC_LP_PSB); _bfd_vms_output_long @@ -5157,6 +5158,7 @@ alpha_vms_slurp_relocs (bfd *abfd) asection *sec; struct vms_section_data_struct *vms_sec; arelent *reloc; + bfd_size_type size; /* Get section to which the relocation applies. */ if (cur_psect < 0 || cur_psect > (int)PRIV (section_count)) @@ -5237,7 +5239,11 @@ alpha_vms_slurp_relocs (bfd *abfd) reloc->address = cur_address; reloc->addend = cur_addend; - vaddr += bfd_get_reloc_size (reloc->howto); + if (reloc_code == ALPHA_R_LINKAGE) + size = 16; + else + size = bfd_get_reloc_size (reloc->howto); + vaddr += size; } cur_addend = 0; @@ -5496,8 +5502,8 @@ static reloc_howto_type alpha_howto_table[] = /* Hack. Linkage is done by linker. */ HOWTO (ALPHA_R_LINKAGE, /* Type. */ 0, /* Rightshift. */ - 8, /* Size (0 = byte, 1 = short, 2 = long). */ - 256, /* Bitsize. */ + 0, /* Size (0 = byte, 1 = short, 2 = long). */ + 0, /* Bitsize. */ FALSE, /* PC relative. */ 0, /* Bitpos. */ complain_overflow_dont,/* Complain_on_overflow. */ |