diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/dl-load.c | 31 | ||||
| -rw-r--r-- | elf/dl-runtime.c | 4 | ||||
| -rw-r--r-- | elf/elf.h | 65 |
3 files changed, 96 insertions, 4 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index a103d38548..10cc074a6a 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -67,6 +67,18 @@ int _dl_zerofd = -1; #define ANONFD _dl_zerofd #endif +/* Handle situations where we have a preferred location in memory for + the shared objects. */ +#ifdef ELF_PREFERRED_ADDRESS_DATA +ELF_PREFERRED_ADDRESS_DATA; +#endif +#ifndef ELF_PREFERRED_ADDRESS +#define ELF_PREFERRED_ADDRESS(loader, maplength, mapstartpref) (mapstartpref) +#endif +#ifndef ELF_FIXED_ADDRESS +#define ELF_FIXED_ADDRESS(loader, mapstart) ((void) 0) +#endif + size_t _dl_pagesize; @@ -315,11 +327,16 @@ _dl_map_object_from_fd (char *name, int fd, char *realname, So we map the first segment without MAP_FIXED, but with its extent increased to cover all the segments. Then we remove access from excess portion, and there is known sufficient space - there to remap from the later segments. */ + there to remap from the later segments. + + As a refinement, sometimes we have an address that we would + prefer to map such objects at; but this is only a preference, + the OS can do whatever it likes. */ caddr_t mapat; - mapat = map_segment (c->mapstart, - loadcmds[nloadcmds - 1].allocend - c->mapstart, - c->prot, 0, c->mapoff); + ElfW(Addr) mappref; + size_t maplength = loadcmds[nloadcmds - 1].allocend - c->mapstart; + mappref = ELF_PREFERRED_ADDRESS (loader, maplength, c->mapstart); + mapat = map_segment (mappref, maplength, c->prot, 0, c->mapoff); l->l_addr = (ElfW(Addr)) mapat - c->mapstart; /* Change protection on the excess portion to disallow all access; @@ -332,6 +349,12 @@ _dl_map_object_from_fd (char *name, int fd, char *realname, 0); goto postmap; } + else + { + /* Notify ELF_PREFERRED_ADDRESS that we have to load this one + fixed. */ + ELF_FIXED_ADDRESS (loader, c->mapstart); + } while (c < &loadcmds[nloadcmds]) { diff --git a/elf/dl-runtime.c b/elf/dl-runtime.c index 08c605cd0f..502c35d5d2 100644 --- a/elf/dl-runtime.c +++ b/elf/dl-runtime.c @@ -153,7 +153,11 @@ fixup ( *_dl_global_scope_end = NULL; /* Return the address that was written by the relocation. */ +#ifdef ELF_FIXUP_RETURNS_ADDRESS + return (ElfW(Addr))(l->l_addr + reloc->r_offset); +#else return *(ElfW(Addr) *) (l->l_addr + reloc->r_offset); +#endif } diff --git a/elf/elf.h b/elf/elf.h index f6779ba16a..76f6c6865d 100644 --- a/elf/elf.h +++ b/elf/elf.h @@ -915,6 +915,71 @@ typedef Elf32_Addr Elf32_Conflict; #define R_ALPHA_JMP_SLOT 26 /* Create PLT entry */ #define R_ALPHA_RELATIVE 27 /* Adjust by program base */ + +/* PowerPC specific declarations */ + +/* PowerPC relocations defined by the ABIs */ +#define R_PPC_NONE 0 +#define R_PPC_ADDR32 1 +#define R_PPC_ADDR24 2 +#define R_PPC_ADDR16 3 +#define R_PPC_ADDR16_LO 4 +#define R_PPC_ADDR16_HI 5 +#define R_PPC_ADDR16_HA 6 +#define R_PPC_ADDR14 7 +#define R_PPC_ADDR14_BRTAKEN 8 +#define R_PPC_ADDR14_BRNTAKEN 9 +#define R_PPC_REL24 10 +#define R_PPC_REL14 11 +#define R_PPC_REL14_BRTAKEN 12 +#define R_PPC_REL14_BRNTAKEN 13 +#define R_PPC_GOT16 14 +#define R_PPC_GOT16_LO 15 +#define R_PPC_GOT16_HI 16 +#define R_PPC_GOT16_HA 17 +#define R_PPC_PLTREL24 18 +#define R_PPC_COPY 19 +#define R_PPC_GLOB_DAT 20 +#define R_PPC_JMP_SLOT 21 +#define R_PPC_RELATIVE 22 +#define R_PPC_LOCAL24PC 23 +#define R_PPC_UADDR32 24 +#define R_PPC_UADDR16 25 +#define R_PPC_REL32 26 +#define R_PPC_PLT32 27 +#define R_PPC_PLTREL32 28 +#define R_PPC_PLT16_LO 29 +#define R_PPC_PLT16_HI 30 +#define R_PPC_PLT16_HA 31 +#define R_PPC_SDAREL16 32 +#define R_PPC_SECTOFF 33 +#define R_PPC_SECTOFF_LO 34 +#define R_PPC_SECTOFF_HI 35 +#define R_PPC_SECTOFF_HA 36 + +/* The remaining relocs are from the Embedded ELF ABI, and are not + in the SVR4 ELF ABI. */ +#define R_PPC_EMB_NADDR32 101 +#define R_PPC_EMB_NADDR16 102 +#define R_PPC_EMB_NADDR16_LO 103 +#define R_PPC_EMB_NADDR16_HI 104 +#define R_PPC_EMB_NADDR16_HA 105 +#define R_PPC_EMB_SDAI16 106 +#define R_PPC_EMB_SDA2I16 107 +#define R_PPC_EMB_SDA2REL 108 +#define R_PPC_EMB_SDA21 109 +#define R_PPC_EMB_MRKREF 110 +#define R_PPC_EMB_RELSEC16 111 +#define R_PPC_EMB_RELST_LO 112 +#define R_PPC_EMB_RELST_HI 113 +#define R_PPC_EMB_RELST_HA 114 +#define R_PPC_EMB_BIT_FLD 115 +#define R_PPC_EMB_RELSDA 116 + +/* This is a phony reloc to handle any old fashioned TOC16 references + that may still be in object files. */ +#define R_PPC_TOC16 255 + __END_DECLS #endif /* elf.h */ |