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| author | kib <kib@FreeBSD.org> | 2014-08-29 09:29:10 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2014-08-29 09:29:10 +0000 |
| commit | c51525766a3c99d4f94f5933c7ec5d897131b048 (patch) | |
| tree | 238a29587db0248137a896568b184c9b00397ce0 /libexec/rtld-elf/rtld.h | |
| parent | ece271f9c965d80e212b6848db0c2ad971d20948 (diff) | |
| download | FreeBSD-src-c51525766a3c99d4f94f5933c7ec5d897131b048.zip FreeBSD-src-c51525766a3c99d4f94f5933c7ec5d897131b048.tar.gz | |
IFUNC symbol type shall be processed for non-PLT relocations,
e.g. when a global variable is initialized with a pointer to ifunc.
Add symbol type check and call resolver for STT_GNU_IFUNC symbol types
when processing non-PLT relocations, but only after non-IFUNC
relocations are done. The two-phase proceessing is required since
resolvers may reference other symbols, which must be ready to use when
resolver calls are done.
Restructure reloc_non_plt() on x86 to call find_symdef() and handle
IFUNC in single place.
For non-x86 reloc_non_plt(), check for call for IFUNC relocation and
do nothing, to avoid processing relocs twice.
PR: 193048
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Diffstat (limited to 'libexec/rtld-elf/rtld.h')
| -rw-r--r-- | libexec/rtld-elf/rtld.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libexec/rtld-elf/rtld.h b/libexec/rtld-elf/rtld.h index cbeff66..a0f24cc 100644 --- a/libexec/rtld-elf/rtld.h +++ b/libexec/rtld-elf/rtld.h @@ -293,6 +293,8 @@ typedef struct Struct_Obj_Entry { #define SYMLOOK_DLSYM 0x02 /* Return newest versioned symbol. Used by dlsym. */ #define SYMLOOK_EARLY 0x04 /* Symlook is done during initialization. */ +#define SYMLOOK_IFUNC 0x08 /* Allow IFUNC processing in + reloc_non_plt(). */ /* Flags for load_object(). */ #define RTLD_LO_NOLOAD 0x01 /* dlopen() specified RTLD_NOLOAD. */ |
