RFH/RFC: ld generating incorrect Elf DT_RELSZ...
David Daney
ddaney@avtrex.com
Fri May 20 20:44:00 GMT 2005
I am running a binutils-2.16 / gcc-4.0.0 cross toolchain with
--target=mipsel-linux --host=i686-pc-linux-gnu.
It looks to me like ld is generating DT_RELSZ with the wrong value (too
small). This causes ld.so to not fully relocate the object resulting in
runtime errors.
The object in question is libgcj.so.6.0.0 which is the java runtime
library from gcc-4.0.0.
Here is the information which shows the problem:
$ mipsel-linux-readelf -d libgcj.so.6
Dynamic section at offset 0xec contains 30 entries:
Tag Type Name/Value
0x00000001 (NEEDED) Shared library: [libpthread.so.0]
0x00000001 (NEEDED) Shared library: [libdl.so.2]
0x00000001 (NEEDED) Shared library: [libz.so.1]
0x00000001 (NEEDED) Shared library: [libgcc_s.so.1]
0x00000001 (NEEDED) Shared library: [libc.so.6]
0x0000000e (SONAME) Library soname: [libgcj.so.6]
0x0000000c (INIT) 0x5f1620
0x0000000d (FINI) 0xb30830
0x00000004 (HASH) 0x204
0x00000005 (STRTAB) 0xe8c18
0x00000006 (SYMTAB) 0x48418
0x0000000a (STRSZ) 2301918 (bytes)
0x0000000b (SYMENT) 16 (bytes)
0x00000015 (DEBUG) 0x0
0x00000016 (TEXTREL) 0x0
0x00000003 (PLTGOT) 0x102f640
0x00000011 (REL) 0x32ee08
0x00000012 (RELSZ) 2661784 (bytes)
0x00000013 (RELENT) 8 (bytes)
.
.
.
From this I calculate that ld.so will do 2661784/8 == 332723
(RELSZ/RELENT) relocations.
$ mipsel-linux-readelf -W -r libgcj.so.6 | more
Relocation section '.rel.dyn' at offset 0x32ee08 contains 361731 entries:
Offset Info Type Sym. Value Symbol's Name
00000000 00000000 R_MIPS_NONE
.
.
.
.rel.dyn contains 361731 relocations.
In theory all relocations that come after RELSZ/RELENT should be
R_MIPS_NONE as they presumable would not be needed. This should be
361731 - 332723 == 29008 unneeded relocation slots in the end of .rel.dyn.
However if I do:
[daney@dl2 .libs]$ mipsel-linux-readelf -W -r libgcj.so.6 | tail -n
29008 | more
0105414c 00a06903 R_MIPS_REL32 00fc0bc0
_ZN5javax8security4sasl13SaslException6class$E
01056428 00a06a03 R_MIPS_REL32 0099fd24
_ZN5javax5swing4text28DefaultEditorKit$PasteActionC1Ev
00dfe64c 00a06b03 R_MIPS_REL32 00fe6a50
_ZN3gnu3xml9transform15CurrentFunction6class$E
01052808 00a06b03 R_MIPS_REL32 00fe6a50
_ZN3gnu3xml9transform15CurrentFunction6class$E
00fbf600 00a06c03 R_MIPS_REL32 00fbf518
_ZN5javax8security4auth8callback20ConfirmationCallback16OK_CANCEL_OPTIONE
01053030 00a06c03 R_MIPS_REL32 00fbf518
_ZN5javax8security4auth8callback20ConfirmationCallback16OK_CANCEL_OPTIONE
00dfde6c 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00fa4abc 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00fa4fcc 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00fa677c 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00fa693c 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00faa6dc 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00fac0a8 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00fac2f8 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00fac688 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00fae0e8 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
00fae378 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
01064b74 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
01054128 00a06d03 R_MIPS_REL32 00fa4060
_ZN5javax5print9attribute9Attribute6class$E
0105e5b8 00a06e03 R_MIPS_REL32 00979100
_ZN5javax5swing11JOptionPane12getRootFrameEv
00ef0b18 00a06f03 R_MIPS_REL32 00eeff34
_ZN4java3awt5event8KeyEvent7VK_LESSE
0105b9c4 00a06f03 R_MIPS_REL32 00eeff34
_ZN4java3awt5event8KeyEvent7VK_LESSE
00fa17e4 00a07003 R_MIPS_REL32 00fa184c
_ZTVN5javax3net3ssl13SSLPermissionE
01064b24 00a07003 R_MIPS_REL32 00fa184c
_ZTVN5javax3net3ssl13SSLPermissionE
00f6361c 00a07103 R_MIPS_REL32 00983be8
_ZN5javax5swing11JTabbedPane20getAccessibleContextEv
0106221c 00a07103 R_MIPS_REL32 00983be8
_ZN5javax5swing11JTabbedPane20getAccessibleContextEv
00f628e8 00a07203 R_MIPS_REL32 00980680
_ZN5javax5swing8JSpinner8getModelEv
0105d0a8 00a07203 R_MIPS_REL32 00980680
_ZN5javax5swing8JSpinner8getModelEv
00f525d0 00a07303 R_MIPS_REL32 0096a988
_ZN5javax5swing16DefaultListModel12getElementAtEi
0105eac8 00a07303 R_MIPS_REL32 0096a988
_ZN5javax5swing16DefaultListModel12getElementAtEi
00f1ba98 00a07403 R_MIPS_REL32 008f1d1c
_ZN4java5beans11beancontext26BeanContextServicesSupport24getCurrentServiceClassesEv
0105dfb4 00a07403 R_MIPS_REL32 008f1d1c
_ZN4java5beans11beancontext26BeanContextServicesSupport24getCurrentServiceClassesEv
00efdff4 00a07503 R_MIPS_REL32 00efdd7c
_ZN4java3awt5image13BufferedImage16TYPE_BYTE_BINARYE
01058be0 00a07503 R_MIPS_REL32 00efdd7c
_ZN4java3awt5image13BufferedImage16TYPE_BYTE_BINARYE
00eeb52c 00a07603 R_MIPS_REL32 00eeb1a0
_ZN4java3awt5color11ICC_Profile14icSigSpaceDCLRE
0105bab8 00a07603 R_MIPS_REL32 00eeb1a0
_ZN4java3awt5color11ICC_Profile14icSigSpaceDCLRE
00edc3e8 00a07703 R_MIPS_REL32 0084cb1c
_ZN4java3awt10EventQueue4pushEPS1_
01056ce4 00a07703 R_MIPS_REL32 0084cb1c
_ZN4java3awt10EventQueue4pushEPS1_
00ed3938 00a07803 R_MIPS_REL32 00833c10
_ZN4java3awt26Button$AccessibleAWTButton17getAccessibleRoleEv
01064c54 00a07803 R_MIPS_REL32 00833c10
_ZN4java3awt26Button$AccessibleAWTButton17getAccessibleRoleEv
00f225e4 00a07903 R_MIPS_REL32 00f22668
_ZTVN5javax5swing39AbstractButton$AccessibleAbstractButtonE
0105b1d0 00a07903 R_MIPS_REL32 00f22668
_ZTVN5javax5swing39AbstractButton$AccessibleAbstractButtonE
00ed3e48 00a07a03 R_MIPS_REL32 00834608
_ZN4java3awt6Button20getAccessibleContextEv
0105e31c 00a07a03 R_MIPS_REL32 00834608
_ZN4java3awt6Button20getAccessibleContextEv
00f67998 00a07b03 R_MIPS_REL32 00986f2c
_ZN5javax5swing5JTree34getPreferredScrollableViewportSizeEv
0105ef30 00a07b03 R_MIPS_REL32 00986f2c
_ZN5javax5swing5JTree34getPreferredScrollableViewportSizeEv
00f2a928 00a07c03 R_MIPS_REL32 009428b8
_ZN5javax5swing4plaf5basic11BasicTextUI25getNextVisualPositionFromEPNS0_4text14JTextComponentEiPNS4_13Position$BiasEiP6JArrayIS8_E
00f2aaf8 00a07c03 R_MIPS_REL32 009428b8
_ZN5javax5swing4plaf5basic11BasicTextUI25getNextVisualPositionFromEPNS0_4text14JTextComponentEiPNS4_13Position$BiasEiP6JArrayIS8_E
00f324c8 00a07c03 R_MIPS_REL32 009428b8
_ZN5javax5swing4plaf5basic11BasicTextUI25getNextVisualPositionFromEPNS0_4text14JTextComponentEiPNS4_13Position$BiasEiP6JArrayIS8_E
00f3bf18 00a07c03 R_MIPS_REL32 009428b8
_ZN5javax5swing4plaf5basic11BasicTextUI25getNextVisualPositionFromEPNS0_4text14JTextComponentEiPNS4_13Position$BiasEiP6JArrayIS8_E
00f3c0e8 00a07c03 R_MIPS_REL32 009428b8
_ZN5javax5swing4plaf5basic11BasicTextUI25getNextVisualPositionFromEPNS0_4text14JTextComponentEiPNS4_13Position$BiasEiP6JArrayIS8_E
00f3c2e8 00a07c03 R_MIPS_REL32 009428b8
_ZN5javax5swing4plaf5basic11BasicTextUI25getNextVisualPositionFromEPNS0_4text14JTextComponentEiPNS4_13Position$BiasEiP6JArrayIS8_E
00f3cbb4 00a07c03 R_MIPS_REL32 009428b8
_ZN5javax5swing4plaf5basic11BasicTextUI25getNextVisualPositionFromEPNS0_4text14JTextComponentEiPNS4_13Position$BiasEiP6JArrayIS8_E
01061ad0 00a07c03 R_MIPS_REL32 009428b8
_ZN5javax5swing4plaf5basic11BasicTextUI25getNextVisualPositionFromEPNS0_4text14JTextComponentEiPNS4_13Position$BiasEiP6JArrayIS8_E
00eec324 00a07d03 R_MIPS_REL32 00eec38c
_ZTVN4java3awt5color12CMMExceptionE
010634ec 00a07d03 R_MIPS_REL32 00eec38c
_ZTVN4java3awt5color12CMMExceptionE
00ed9bd8 00a07e03 R_MIPS_REL32 00845a20
_ZN4java3awt25Container$GfxPaintVisitor5visitEPNS0_9ComponentEPNS0_8GraphicsE
0106480c 00a07e03 R_MIPS_REL32 00845a20
_ZN4java3awt25Container$GfxPaintVisitor5visitEPNS0_9ComponentEPNS0_8GraphicsE
00fc3448 00a07f03 R_MIPS_REL32 01076188
_ZN5javax13accessibility15AccessibleState9COLLAPSEDE
01053fa4 00a07f03 R_MIPS_REL32 01076188
_ZN5javax13accessibility15AccessibleState9COLLAPSEDE
00000000 00000000 R_MIPS_NONE
00000000 00000000 R_MIPS_NONE
00000000 00000000 R_MIPS_NONE
00000000 00000000 R_MIPS_NONE
.
.
.
You can see that there are quite a few needed relocations that will not
be done.
Any Ideas about what is going on here?
Thanks in advance for any insight.
David Daney.
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