ia64-hp-hpux* linker
Denis Scherbakov
denis_scherbakov@yahoo.com
Fri Apr 24 14:42:00 GMT 2009
> It's really odd that this symbol would end up in the abs section. I don't
> know anything about hpux, but could the hidden visibility somehow mean that in
> file2, shTest is effectively a COMMON symbol (and then, that there's maybe
> some kind of problem with COMMON handling additionally)? What does "nm
> file1.o" look like when you compile with --save-temps? Does
> "-fno-zero-initialized-in-bss" help any?
Dave, thanks for asking.
-fno-zero-initialized-in-bss does not help. Here are the outputs:
================================================
$ nm file.o
00000000 T func
U puts
00000002 A varTest
================================================
$ nm file2.o
00000000 T func2
U printf
U varTest
================================================
$ nm main.o
U func
U func2
00000000 T main
================================================
$ cat file.s
.file "file.c"
.pred.safe_across_calls p1-p5,p16-p63
.section .rodata, "a", "progbits"
.align 8
.LC0:
stringz "func test"
.section .text, "ax", "progbits"
.align 16
.global func#
.type func#, @function
.proc func#
func:
.prologue 14, 32
.save ar.pfs, r33
alloc r33 = ar.pfs, 0, 4, 1, 0
.vframe r34
mov r34 = r12
.save rp, r32
mov r32 = b0
mov r35 = r1
.body
addl r14 = @gprel(varTest#), gp
;;
st2 [r14] = r0
addl r36 = @ltoffx(.LC0), r1
;;
ld8.mov r36 = [r36], .LC0
br.call.sptk.many b0 = puts#
mov r1 = r35
;;
mov ar.pfs = r33
mov b0 = r32
.restore sp
mov r12 = r34
br.ret.sptk.many b0
;;
.endp func#
.hidden varTest#
.common varTest#,2,2
.global puts#
.type puts#, @function
.ident "GCC: (GNU) 4.3.3"
================================================
$ readelf -a file.o
ELF Header:
Magic: 7f 45 4c 46 01 02 01 01 01 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, big endian
Version: 1 (current)
OS/ABI: UNIX - HP-UX
ABI Version: 1
Type: REL (Relocatable file)
Machine: Intel IA-64
Version: 0x1
Entry point address: 0x0
Start of program headers: 0 (bytes into file)
Start of section headers: 344 (bytes into file)
Flags: 0x8, 32-bit
Size of this header: 52 (bytes)
Size of program headers: 0 (bytes)
Number of program headers: 0
Size of section headers: 40 (bytes)
Number of section headers: 13
Section header string table index: 10
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .text PROGBITS 00000000 000040 000070 00 AX 0 0 16
[ 2] .rela.text RELA 00000000 000424 000030 0c 11 1 4
[ 3] .data PROGBITS 00000000 0000b0 000000 00 WA 0 0 1
[ 4] .bss NOBITS 00000000 0000b0 000000 00 WA 0 0 1
[ 5] .rodata PROGBITS 00000000 0000b0 00000a 00 A 0 0 8
[ 6] .IA_64.unwind_inf PROGBITS 00000000 0000bc 000014 00 A 0 0 4
[ 7] .IA_64.unwind IA_64_UNWIND 00000000 0000d0 00000c 00 AL 1 1 4
[ 8] .rela.IA_64.unwin RELA 00000000 000454 000024 0c 11 7 4
[ 9] .comment PROGBITS 00000000 0000dc 000012 00 0 0 1
[10] .shstrtab STRTAB 00000000 0000ee 000068 00 0 0 1
[11] .symtab SYMTAB 00000000 000360 0000b0 10 12 8 4
[12] .strtab STRTAB 00000000 000410 000013 00 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
There are no section groups in this file.
There are no program headers in this file.
Relocation section '.rela.text' at offset 0x424 contains 4 entries:
Offset Info Type Sym.Value Sym. Name + Addend
00000011 0000092a R_IA64_GPREL22 00000002 varTest + 0
00000021 00000486 R_IA64_LTOFF22X 00000000 .rodata + 0
00000030 00000487 R_IA64_LDXMOV 00000000 .rodata + 0
00000032 00000a49 R_IA64_PCREL21B 00000000 puts + 0
Relocation section '.rela.IA_64.unwind' at offset 0x454 contains 3 entries:
Offset Info Type Sym.Value Sym. Name + Addend
00000000 0000015c R_IA64_SEGREL32MS 00000000 .text + 0
00000004 0000015c R_IA64_SEGREL32MS 00000000 .text + 70
00000008 0000055c R_IA64_SEGREL32MS 00000000 .IA_64.unwind_info + 0
Unwind section '.IA_64.unwind' at offset 0xd0 contains 1 entries:
<func>: [0x0-0x70], info at +0x0
v1, flags=0x0 (), len=12 bytes
R2:prologue_gr(mask=[rp,ar.pfs,psp],grsave=r32,rlen=4)
P7:pfs_when(t=0)
P7:mem_stack_v(t=1)
P7:rp_when(t=2)
R1:body(rlen=17)
B2:epilogue(t=3,ecount=0)
Symbol table '.symtab' contains 11 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 SECTION LOCAL DEFAULT 1
2: 00000000 0 SECTION LOCAL DEFAULT 3
3: 00000000 0 SECTION LOCAL DEFAULT 4
4: 00000000 0 SECTION LOCAL DEFAULT 5
5: 00000000 0 SECTION LOCAL DEFAULT 6
6: 00000000 0 SECTION LOCAL DEFAULT 7
7: 00000000 0 SECTION LOCAL DEFAULT 9
8: 00000000 112 FUNC GLOBAL DEFAULT 1 func
9: 00000002 2 OBJECT GLOBAL HIDDEN ANSI_COM varTest
10: 00000000 0 FUNC GLOBAL DEFAULT UND puts
No version information found in this file.
================================================
$ readelf -a file2.o
ELF Header:
Magic: 7f 45 4c 46 01 02 01 01 01 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, big endian
Version: 1 (current)
OS/ABI: UNIX - HP-UX
ABI Version: 1
Type: REL (Relocatable file)
Machine: Intel IA-64
Version: 0x1
Entry point address: 0x0
Start of program headers: 0 (bytes into file)
Start of section headers: 344 (bytes into file)
Flags: 0x8, 32-bit
Size of this header: 52 (bytes)
Size of program headers: 0 (bytes)
Number of program headers: 0
Size of section headers: 40 (bytes)
Number of section headers: 13
Section header string table index: 10
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .text PROGBITS 00000000 000040 000070 00 AX 0 0 16
[ 2] .rela.text RELA 00000000 000428 000030 0c 11 1 4
[ 3] .data PROGBITS 00000000 0000b0 000000 00 WA 0 0 1
[ 4] .bss NOBITS 00000000 0000b0 000000 00 WA 0 0 1
[ 5] .rodata PROGBITS 00000000 0000b0 00000a 00 A 0 0 8
[ 6] .IA_64.unwind_inf PROGBITS 00000000 0000bc 000014 00 A 0 0 4
[ 7] .IA_64.unwind IA_64_UNWIND 00000000 0000d0 00000c 00 AL 1 1 4
[ 8] .rela.IA_64.unwin RELA 00000000 000458 000024 0c 11 7 4
[ 9] .comment PROGBITS 00000000 0000dc 000012 00 0 0 1
[10] .shstrtab STRTAB 00000000 0000ee 000068 00 0 0 1
[11] .symtab SYMTAB 00000000 000360 0000b0 10 12 8 4
[12] .strtab STRTAB 00000000 000410 000016 00 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
There are no section groups in this file.
There are no program headers in this file.
Relocation section '.rela.text' at offset 0x428 contains 4 entries:
Offset Info Type Sym.Value Sym. Name + Addend
00000011 0000092a R_IA64_GPREL22 00000000 varTest + 0
00000021 00000486 R_IA64_LTOFF22X 00000000 .rodata + 0
00000030 00000487 R_IA64_LDXMOV 00000000 .rodata + 0
00000032 00000a49 R_IA64_PCREL21B 00000000 printf + 0
Relocation section '.rela.IA_64.unwind' at offset 0x458 contains 3 entries:
Offset Info Type Sym.Value Sym. Name + Addend
00000000 0000015c R_IA64_SEGREL32MS 00000000 .text + 0
00000004 0000015c R_IA64_SEGREL32MS 00000000 .text + 70
00000008 0000055c R_IA64_SEGREL32MS 00000000 .IA_64.unwind_info + 0
Unwind section '.IA_64.unwind' at offset 0xd0 contains 1 entries:
<func2>: [0x0-0x70], info at +0x0
v1, flags=0x0 (), len=12 bytes
R2:prologue_gr(mask=[rp,ar.pfs,psp],grsave=r32,rlen=4)
P7:pfs_when(t=0)
P7:mem_stack_v(t=1)
P7:rp_when(t=2)
R1:body(rlen=17)
B2:epilogue(t=3,ecount=0)
Symbol table '.symtab' contains 11 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 SECTION LOCAL DEFAULT 1
2: 00000000 0 SECTION LOCAL DEFAULT 3
3: 00000000 0 SECTION LOCAL DEFAULT 4
4: 00000000 0 SECTION LOCAL DEFAULT 5
5: 00000000 0 SECTION LOCAL DEFAULT 6
6: 00000000 0 SECTION LOCAL DEFAULT 7
7: 00000000 0 SECTION LOCAL DEFAULT 9
8: 00000000 112 FUNC GLOBAL DEFAULT 1 func2
9: 00000000 0 NOTYPE GLOBAL HIDDEN UND varTest
10: 00000000 0 FUNC GLOBAL DEFAULT UND printf
No version information found in this file.
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