`.LANCHOR0' referenced in section `.text' of libc_pic.a(strtoul_l.os):
defined in discarded section `.gnu.linkonce.r.__strtol_ul_max_tab' of
libc_pic.a(strtoul_l.os)
`.LANCHOR1' referenced in section `.text' of libc_pic.a(strtoul_l.os):
defined in discarded section `.gnu.linkonce.r.__strtol_ul_rem_tab' of
libc_pic.a(strtoul_l.os)
-fno-section-anchors strtoul_l.os
000000fe 00000f0e R_PPC_GOT16 00000000 __strtol_ul_max_tab + 0
00000102 0000100e R_PPC_GOT16 00000000 __strtol_ul_rem_tab + 0
15: 00000000 140 OBJECT GLOBAL HIDDEN 5 __strtol_ul_max_tab
16: 00000000 35 OBJECT GLOBAL HIDDEN 6 __strtol_ul_rem_tab
-fsection-anchors strtoul_l_os
000000fe 0000060e R_PPC_GOT16 00000000 .LANCHOR0 + 0
00000102 0000080e R_PPC_GOT16 00000000 .LANCHOR1 + 0
6: 00000000 0 NOTYPE LOCAL DEFAULT 5 .LANCHOR0
8: 00000000 0 NOTYPE LOCAL DEFAULT 6 .LANCHOR1
GOT relocs work by creating one entry in .got per symbol, so for example
if there are a dozen GOT relocs referencing __strtol_ul_max_tab you get
just one entry in .got. Global symbols merge. There can only be one
strong definition of a global symbol, and all references resolve to
that single definition. However, .LANCHOR0 is local, so is a different
symbol to .LANCHOR0 in some other file. Thus the GOT reloc referencing
.LANCHOR0 in this file creates a separate .got entry to a GOT reloc in
another file referencing .LANCHOR0.
I'd say this is a gcc bug. (The GOT reloc can't really use section
anchors anyway because [EMAIL PROTECTED] has rather useless semantics, so why
can't gcc use the original symbol?) ld can't treat the local symbols in
linkonce sections as if they were global because .LANCHOR0 in
.gnu.linkonce.r.__strtol_ul_max_tab must be different from .LANCHOR0 in
.gnu.linkonce.r.some_other_name.
--
Summary: [4.2 Regression] GOT reloc using section anchor
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dje at gcc dot gnu dot org
GCC build triplet: powerpc-linux
GCC host triplet: powerpc-linux
GCC target triplet: powerpc-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28598
