https://sourceware.org/bugzilla/show_bug.cgi?id=19938
Bug ID: 19938
Summary: objcopy breaks sh_link and sh_info of SHT_SUNW_LDYNSYM
and SHT_SUNW_symsort sections
Product: binutils
Version: 2.26
Status: NEW
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: ro at TechFak dot Uni-Bielefeld.DE
Target Milestone: 2.27
Host: *-*-solaris2.*
Target: *-*-solaris2.*
Build: *-*-solaris2.*
objcopy invalidates (at least) two Solaris-specific sections:
* hello is a trivial hello world program linked with Solaris ld.
ro@lokon 1274 > objcopy hello hello.copy
ro@lokon 1275 > elfdump hello > /dev/null
ro@lokon 1276 > elfdump hello.copy > /dev/null
hello.copy: .SUNW_ldynsym: sh_link: 0: does not point to a valid section
hello.copy: .SUNW_dynsymsort: sh_link: 0: does not point to a valid section
ro@lokon 1277 > elfdump -N .SUNW_ldynsym -N .SUNW_dynsymsort -c hello
Section Header[3]: sh_name: .SUNW_ldynsym
sh_addr: 0x80501ac sh_flags: [ SHF_ALLOC ]
sh_size: 0xe0 sh_type: [ SHT_SUNW_LDYNSYM ]
sh_offset: 0x1ac sh_entsize: 0x10 (14 entries)
sh_link: 5 sh_info: 14
sh_addralign: 0x4
Section Header[8]: sh_name: .SUNW_dynsymsort
sh_addr: 0x80507ec sh_flags: [ SHF_ALLOC ]
sh_size: 0x2c sh_type: [ SHT_SUNW_symsort ]
sh_offset: 0x7ec sh_entsize: 0x4 (11 entries)
sh_link: 3 sh_info: 0
sh_addralign: 0x4
ro@lokon 1278 > elfdump -N .SUNW_ldynsym -N .SUNW_dynsymsort -c hello.copy
Section Header[3]: sh_name: .SUNW_ldynsym
sh_addr: 0x80501ac sh_flags: [ SHF_ALLOC ]
sh_size: 0xe0 sh_type: [ SHT_SUNW_LDYNSYM ]
sh_offset: 0x1ac sh_entsize: 0x10 (14 entries)
sh_link: 0 sh_info: 0
sh_addralign: 0x4
Section Header[8]: sh_name: .SUNW_dynsymsort
sh_addr: 0x80507ec sh_flags: [ SHF_ALLOC ]
sh_size: 0x2c sh_type: [ SHT_SUNW_symsort ]
sh_offset: 0x7ec sh_entsize: 0x4 (11 entries)
sh_link: 0 sh_info: 0
sh_addralign: 0x4
Obviously objcopy loses the sh_link and sh_info fields, which are described
in the Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, Object File
Format, Table 13-9 ELF sh_link and sh_info Interpretation:
http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
Rainer
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