diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc64/dl-machine.h')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/dl-machine.h | 750 |
1 files changed, 750 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/dl-machine.h b/sysdeps/powerpc/powerpc64/dl-machine.h new file mode 100644 index 0000000000..408161649b --- /dev/null +++ b/sysdeps/powerpc/powerpc64/dl-machine.h @@ -0,0 +1,750 @@ +/* Machine-dependent ELF dynamic relocation inline functions. + PowerPC64 version. + Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef dl_machine_h +#define dl_machine_h + +#define ELF_MACHINE_NAME "powerpc64" + +#include <assert.h> +#include <sys/param.h> + +/* Translate a processor specific dynamic tag to the index + in l_info array. */ +#define DT_PPC64(x) (DT_PPC64_##x - DT_LOPROC + DT_NUM) + +/* A PowerPC64 function descriptor. The .plt (procedure linkage + table) and .opd (official procedure descriptor) sections are + arrays of these. */ +typedef struct +{ + Elf64_Addr fd_func; + Elf64_Addr fd_toc; + Elf64_Addr fd_aux; +} Elf64_FuncDesc; + +#define ELF_MULT_MACHINES_SUPPORTED + +/* Return nonzero iff ELF header is compatible with the running host. */ +static inline int +elf_machine_matches_host (const Elf64_Ehdr *ehdr) +{ + return ehdr->e_machine == EM_PPC64; +} + +/* Return nonzero iff ELF header is compatible with the running host, + but not this loader. */ +static inline int +elf_host_tolerates_machine (const Elf64_Ehdr *ehdr) +{ + return ehdr->e_machine == EM_PPC; +} + +/* Return nonzero iff ELF header is compatible with the running host, + but not this loader. */ +static inline int +elf_host_tolerates_class (const Elf64_Ehdr *ehdr) +{ + return ehdr->e_ident[EI_CLASS] == ELFCLASS32; +} + + +/* Return the run-time load address of the shared object, assuming it + was originally linked at zero. */ +static inline Elf64_Addr +elf_machine_load_address (void) __attribute__ ((const)); + +static inline Elf64_Addr +elf_machine_load_address (void) +{ + Elf64_Addr ret; + + /* The first entry in .got (and thus the first entry in .toc) is the + link-time TOC_base, ie. r2. So the difference between that and + the current r2 set by the kernel is how far the shared lib has + moved. */ + asm ( " ld %0,-32768(2)\n" + " subf %0,%0,2\n" + : "=r" (ret)); + return ret; +} + +/* Return the link-time address of _DYNAMIC. */ +static inline Elf64_Addr +elf_machine_dynamic (void) +{ + Elf64_Addr runtime_dynamic; + /* It's easier to get the run-time address. */ + asm ( " addis %0,2,_DYNAMIC@toc@ha\n" + " addi %0,%0,_DYNAMIC@toc@l\n" + : "=b" (runtime_dynamic)); + /* Then subtract off the load address offset. */ + return runtime_dynamic - elf_machine_load_address() ; +} + +#define ELF_MACHINE_BEFORE_RTLD_RELOC(dynamic_info) /* nothing */ + +/* The PLT uses Elf64_Rela relocs. */ +#define elf_machine_relplt elf_machine_rela + +/* This code gets called via a .glink stub which loads PLT0. It is + used in dl-runtime.c to call the `fixup' function and then redirect + to the address `fixup' returns. + + Enter with r0 = plt reloc index, + r2 = ld.so tocbase, + r11 = ld.so link map. */ + +#define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name) \ + asm (".section \".text\"\n" \ +" .align 2\n" \ +" .globl ." #tramp_name "\n" \ +" .type ." #tramp_name ",@function\n" \ +" .section \".opd\",\"aw\"\n" \ +" .align 3\n" \ +" .globl " #tramp_name "\n" \ +" .size " #tramp_name ",24\n" \ +#tramp_name ":\n" \ +" .quad ." #tramp_name ",.TOC.@tocbase,0\n" \ +" .previous\n" \ +"." #tramp_name ":\n" \ +/* We need to save the registers used to pass parameters, ie. r3 thru \ + r10; the registers are saved in a stack frame. */ \ +" stdu 1,-128(1)\n" \ +" std 3,48(1)\n" \ +" mr 3,11\n" \ +" std 4,56(1)\n" \ +" sldi 4,0,1\n" \ +" std 5,64(1)\n" \ +" add 4,4,0\n" \ +" std 6,72(1)\n" \ +" sldi 4,4,3\n" \ +" std 7,80(1)\n" \ +" mflr 0\n" \ +" std 8,88(1)\n" \ +/* Store the LR in the LR Save area of the previous frame. */ \ +" std 0,128+16(1)\n" \ +" mfcr 0\n" \ +" std 9,96(1)\n" \ +" std 10,104(1)\n" \ +/* I'm almost certain we don't have to save cr... be safe. */ \ +" std 0,8(1)\n" \ +" bl ." #fixup_name "\n" \ +/* Put the registers back. */ \ +" ld 0,128+16(1)\n" \ +" ld 10,104(1)\n" \ +" ld 9,96(1)\n" \ +" ld 8,88(1)\n" \ +" ld 7,80(1)\n" \ +" mtlr 0\n" \ +" ld 0,8(1)\n" \ +" ld 6,72(1)\n" \ +" ld 5,64(1)\n" \ +" ld 4,56(1)\n" \ +" mtcrf 0xFF,0\n" \ +/* Load the target address, toc and static chain reg from the function \ + descriptor returned by fixup. */ \ +" ld 0,0(3)\n" \ +" ld 2,8(3)\n" \ +" mtctr 0\n" \ +" ld 11,16(3)\n" \ +" ld 3,48(1)\n" \ +/* Unwind the stack frame, and jump. */ \ +" addi 1,1,128\n" \ +" bctr\n" \ +".LT_" #tramp_name ":\n" \ +" .long 0\n" \ +" .byte 0x00,0x0c,0x24,0x40,0x00,0x00,0x00,0x00\n" \ +" .long .LT_" #tramp_name "-."#tramp_name "\n" \ +" .short .LT_" #tramp_name "_name_end-.LT_" #tramp_name "_name_start\n" \ +".LT_" #tramp_name "_name_start:\n" \ +" .ascii \"" #tramp_name "\"\n" \ +".LT_" #tramp_name "_name_end:\n" \ +" .align 2\n" \ +" .size ." #tramp_name ",. - ." #tramp_name "\n" \ +" .previous"); + +#ifndef PROF +#define ELF_MACHINE_RUNTIME_TRAMPOLINE \ + TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \ + TRAMPOLINE_TEMPLATE (_dl_profile_resolve, profile_fixup); +#else +#define ELF_MACHINE_RUNTIME_TRAMPOLINE \ + TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \ + void _dl_runtime_resolve (void); \ + strong_alias (_dl_runtime_resolve, _dl_profile_resolve); +#endif + + +/* Initial entry point code for the dynamic linker. The C function + `_dl_start' is the real entry point; its return value is the user + program's entry point. */ +#define RTLD_START \ + asm (".section \".text\"\n" \ +" .align 2\n" \ +" .globl ._start\n" \ +" .type ._start,@function\n" \ +" .section \".opd\",\"aw\"\n" \ +" .align 3\n" \ +" .globl _start\n" \ +" .size _start,24\n" \ +"_start:\n" \ +" .quad ._start,.TOC.@tocbase,0\n" \ +" .previous\n" \ +"._start:\n" \ +/* We start with the following on the stack, from top: \ + argc (4 bytes); \ + arguments for program (terminated by NULL); \ + environment variables (terminated by NULL); \ + arguments for the program loader. */ \ +" mr 3,1\n" \ +" li 4,0\n" \ +" stdu 4,-128(1)\n" \ +/* Call _dl_start with one parameter pointing at argc. */ \ +" bl ._dl_start\n" \ +" nop\n" \ +/* Transfer control to _dl_start_user! */ \ +" b ._dl_start_user\n" \ +".LT__start:\n" \ +" .long 0\n" \ +" .byte 0x00,0x0c,0x24,0x40,0x00,0x00,0x00,0x00\n" \ +" .long .LT__start-._start\n" \ +" .short .LT__start_name_end-.LT__start_name_start\n" \ +".LT__start_name_start:\n" \ +" .ascii \"_start\"\n" \ +".LT__start_name_end:\n" \ +" .align 2\n" \ +" .size ._start,.-._start\n" \ +" .globl _dl_start_user\n" \ +" .section \".opd\",\"aw\"\n" \ +"_dl_start_user:\n" \ +" .quad ._dl_start_user, .TOC.@tocbase, 0\n" \ +" .previous\n" \ +" .globl ._dl_start_user\n" \ +" .type ._dl_start_user,@function\n" \ +/* Now, we do our main work of calling initialisation procedures. \ + The ELF ABI doesn't say anything about parameters for these, \ + so we just pass argc, argv, and the environment. \ + Changing these is strongly discouraged (not least because argc is \ + passed by value!). */ \ +"._dl_start_user:\n" \ +/* the address of _start in r30. */ \ +" mr 30,3\n" \ +/* &_dl_argc in 29, &_dl_argv in 27, and _dl_loaded in 28. */ \ +" ld 28,_rtld_global@got(2)\n" \ +" ld 29,_dl_argc@got(2)\n" \ +" ld 27,_dl_argv@got(2)\n" \ +/* _dl_init (_dl_loaded, _dl_argc, _dl_argv, _dl_argv+_dl_argc+1). */ \ +" ld 3,0(28)\n" \ +" lwa 4,0(29)\n" \ +" ld 5,0(27)\n" \ +" sldi 6,4,3\n" \ +" add 6,5,6\n" \ +" addi 6,6,8\n" \ +" bl ._dl_init\n" \ +" nop\n" \ +/* Now, to conform to the ELF ABI, we have to: \ + Pass argc (actually _dl_argc) in r3; */ \ +" lwa 3,0(29)\n" \ +/* Pass argv (actually _dl_argv) in r4; */ \ +" ld 4,0(27)\n" \ +/* Pass argv+argc+1 in r5; */ \ +" sldi 5,3,3\n" \ +" add 6,4,5\n" \ +" addi 5,6,8\n" \ +/* Pass the auxilary vector in r6. This is passed to us just after \ + _envp. */ \ +"2: ldu 0,8(6)\n" \ +" cmpdi 0,0\n" \ +" bne 2b\n" \ +" addi 6,6,8\n" \ +/* Pass a termination function pointer (in this case _dl_fini) in \ + r7. */ \ +" ld 7,_dl_fini@got(2)\n" \ +" ld 26,_dl_starting_up@got(2)\n" \ +/* Pass the stack pointer in r1 (so far so good), pointing to a NULL \ + value. This lets our startup code distinguish between a program \ + linked statically, which linux will call with argc on top of the \ + stack which will hopefully never be zero, and a dynamically linked \ + program which will always have a NULL on the top of the stack. \ + Take the opportunity to clear LR, so anyone who accidentally \ + returns from _start gets SEGV. Also clear the next few words of \ + the stack. */ \ +" li 31,0\n" \ +" std 31,0(1)\n" \ +" mtlr 31\n" \ +" std 31,8(1)\n" \ +" std 31,16(1)\n" \ +" std 31,24(1)\n" \ +/* Clear _dl_starting_up. */ \ +" stw 31,0(26)\n" \ +/* Now, call the start function descriptor at r30... */ \ +" .globl ._dl_main_dispatch\n" \ +"._dl_main_dispatch:\n" \ +" ld 0,0(30)\n" \ +" ld 2,8(30)\n" \ +" mtctr 0\n" \ +" ld 11,16(30)\n" \ +" bctr\n" \ +".LT__dl_start_user:\n" \ +" .long 0\n" \ +" .byte 0x00,0x0c,0x24,0x40,0x00,0x00,0x00,0x00\n" \ +" .long .LT__dl_start_user-._dl_start_user\n" \ +" .short .LT__dl_start_user_name_end-.LT__dl_start_user_name_start\n" \ +".LT__dl_start_user_name_start:\n" \ +" .ascii \"_dl_start_user\"\n" \ +".LT__dl_start_user_name_end:\n" \ +" .align 2\n" \ +" .size ._dl_start_user,.-._dl_start_user\n" \ +" .previous"); + +/* Nonzero iff TYPE should not be allowed to resolve to one of + the main executable's symbols, as for a COPY reloc. */ +#define elf_machine_lookup_noexec_p(type) ((type) == R_PPC64_COPY) + +/* Nonzero iff TYPE describes relocation of a PLT entry, so + PLT entries should not be allowed to define the value. */ +#define elf_machine_lookup_noplt_p(type) ((type) == R_PPC64_JMP_SLOT) + +/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so + PLT entries should not be allowed to define the value. + ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one + of the main executable's symbols, as for a COPY reloc. */ +#define elf_machine_type_class(type) \ + ((((type) == R_PPC64_ADDR24) * ELF_RTYPE_CLASS_PLT) \ + | (((type) == R_PPC64_COPY) * ELF_RTYPE_CLASS_COPY)) + +/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ +#define ELF_MACHINE_JMP_SLOT R_PPC64_JMP_SLOT + +/* The PowerPC never uses REL relocations. */ +#define ELF_MACHINE_NO_REL 1 + +/* Stuff for the PLT. */ +#define PLT_INITIAL_ENTRY_WORDS 3 +#define GLINK_INITIAL_ENTRY_WORDS 8 + +#define PPC_DCBST(where) asm volatile ("dcbst 0,%0" : : "r"(where) : "memory") +#define PPC_SYNC asm volatile ("sync" : : : "memory") +#define PPC_ISYNC asm volatile ("sync; isync" : : : "memory") +#define PPC_ICBI(where) asm volatile ("icbi 0,%0" : : "r"(where) : "memory") +#define PPC_DIE asm volatile ("tweq 0,0") +/* Use this when you've modified some code, but it won't be in the + instruction fetch queue (or when it doesn't matter if it is). */ +#define MODIFIED_CODE_NOQUEUE(where) \ + do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); } while (0) +/* Use this when it might be in the instruction queue. */ +#define MODIFIED_CODE(where) \ + do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); PPC_ISYNC; } while (0) + +/* Set up the loaded object described by MAP so its unrelocated PLT + entries will jump to the on-demand fixup code in dl-runtime.c. */ +static inline int +elf_machine_runtime_setup (struct link_map *map, int lazy, int profile) +{ + if (map->l_info[DT_JMPREL]) + { + Elf64_Word i; + Elf64_Word *glink = NULL; + Elf64_Xword *plt = (Elf64_Xword *) D_PTR (map, l_info[DT_PLTGOT]); + Elf64_Word num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val + / sizeof (Elf64_Rela)); + Elf64_Addr l_addr = map->l_addr; + Elf64_Dyn **info = map->l_info; + char *p; + + extern void _dl_runtime_resolve (void); + extern void _dl_profile_resolve (void); + + /* Relocate the DT_PPC64_GLINK entry in the _DYNAMIC section. + elf_get_dynamic_info takes care of the standard entries but + doesn't know exactly what to do with processor specific + entires. */ + if (info[DT_PPC64(GLINK)] != NULL) + info[DT_PPC64(GLINK)]->d_un.d_ptr += l_addr; + + if (lazy) + { + /* The function descriptor of the appropriate trampline + routine is used to set the 1st and 2nd doubleword of the + plt_reserve. */ + Elf64_FuncDesc *resolve_fd; + Elf64_Word glink_offset; + /* the plt_reserve area is the 1st 3 doublewords of the PLT */ + Elf64_FuncDesc *plt_reserve = (Elf64_FuncDesc *) plt; + Elf64_Word offset; + + resolve_fd = (Elf64_FuncDesc *) (profile ? _dl_profile_resolve + : _dl_runtime_resolve); + if (profile && _dl_name_match_p (GL(dl_profile), map)) + /* This is the object we are looking for. Say that we really + want profiling and the timers are started. */ + GL(dl_profile_map) = map; + + + /* We need to stuff the address/TOC of _dl_runtime_resolve + into doublewords 0 and 1 of plt_reserve. Then we need to + stuff the map address into doubleword 2 of plt_reserve. + This allows the GLINK0 code to transfer control to the + correct trampoline which will transfer control to fixup + in dl-machine.c. */ + plt_reserve->fd_func = resolve_fd->fd_func; + plt_reserve->fd_toc = resolve_fd->fd_toc; + plt_reserve->fd_aux = (Elf64_Addr) map; +#ifdef RTLD_BOOTSTRAP + /* When we're bootstrapping, the opd entry will not have + been relocated yet. */ + plt_reserve->fd_func += l_addr; + plt_reserve->fd_toc += l_addr; +#endif + + /* Set up the lazy PLT entries. */ + glink = (Elf64_Word *) D_PTR (map, l_info[DT_PPC64(GLINK)]); + offset = PLT_INITIAL_ENTRY_WORDS; + glink_offset = GLINK_INITIAL_ENTRY_WORDS; + for (i = 0; i < num_plt_entries; i++) + { + + plt[offset] = (Elf64_Xword) &glink[glink_offset]; + offset += 3; + /* The first 32k entries of glink can set an index and + branch using two instructions; Past that point, + glink uses three instructions. */ + if (i < 0x8000) + glink_offset += 2; + else + glink_offset += 3; + } + + /* Now, we've modified data. We need to write the changes from + the data cache to a second-level unified cache, then make + sure that stale data in the instruction cache is removed. + (In a multiprocessor system, the effect is more complex.) + Most of the PLT shouldn't be in the instruction cache, but + there may be a little overlap at the start and the end. + + Assumes that dcbst and icbi apply to lines of 16 bytes or + more. Current known line sizes are 16, 32, and 128 bytes. */ + + for (p = (char *) plt; p < (char *) &plt[offset]; p += 16) + PPC_DCBST (p); + PPC_SYNC; + } + } + return lazy; +} + +static inline void +elf_machine_lazy_rel (struct link_map *map, + Elf64_Addr l_addr, const Elf64_Rela *reloc) +{ + /* elf_machine_runtime_setup handles this. */ +} + +/* Change the PLT entry whose reloc is 'reloc' to call the actual + routine. */ +static inline Elf64_Addr +elf_machine_fixup_plt (struct link_map *map, lookup_t sym_map, + const Elf64_Rela *reloc, + Elf64_Addr *reloc_addr, Elf64_Addr finaladdr) +{ + Elf64_FuncDesc *plt = (Elf64_FuncDesc *) reloc_addr; + Elf64_FuncDesc *rel = (Elf64_FuncDesc *) finaladdr; + Elf64_Addr offset = 0; +#ifndef RTLD_BOOTSTRAP + weak_extern (GL(dl_rtld_map)); +#endif + + /* If sym_map is NULL, it's a weak undefined sym; Leave the plt zero. */ + if (sym_map == NULL) + return 0; + + /* If the opd entry is not yet relocated (because it's from a shared + object that hasn't been processed yet), then manually reloc it. */ + if (map != sym_map && !sym_map->l_relocated +#ifndef RTLD_BOOTSTRAP + /* Bootstrap map doesn't have l_relocated set for it. */ + && sym_map != &GL(dl_rtld_map) +#endif + ) + offset = sym_map->l_addr; + + /* For PPC64, fixup_plt copies the function descriptor from opd + over the corresponding PLT entry. + Initially, PLT Entry[i] is set up for lazy linking, or is zero. + For lazy linking, the fd_toc and fd_aux entries are irrelevant, + so for thread safety we write them before changing fd_func. */ + + plt->fd_aux = rel->fd_aux + offset; + plt->fd_toc = rel->fd_toc + offset; + PPC_DCBST (&plt->fd_aux); + PPC_DCBST (&plt->fd_toc); + PPC_SYNC; + + plt->fd_func = rel->fd_func + offset; + PPC_DCBST (&plt->fd_func); + PPC_SYNC; + + return finaladdr; +} + +/* Return the final value of a plt relocation. */ +static inline Elf64_Addr +elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc, + Elf64_Addr value) +{ + return value + reloc->r_addend; +} + +#endif /* dl_machine_h */ + +#ifdef RESOLVE_MAP + +#define PPC_LO(v) ((v) & 0xffff) +#define PPC_HI(v) (((v) >> 16) & 0xffff) +#define PPC_HA(v) PPC_HI ((v) + 0x8000) +#define PPC_HIGHER(v) (((v) >> 32) & 0xffff) +#define PPC_HIGHERA(v) PPC_HIGHER ((v) + 0x8000) +#define PPC_HIGHEST(v) (((v) >> 48) & 0xffff) +#define PPC_HIGHESTA(v) PPC_HIGHEST ((v) + 0x8000) +#define BIT_INSERT(old, val, mask) ((old & ~(Elf64_Addr) mask) | (val & mask)) + +#define dont_expect(X) __builtin_expect ((X), 0) + +extern void _dl_reloc_overflow (struct link_map *map, + const char *name, + Elf64_Addr *const reloc_addr, + const Elf64_Sym *sym, + const Elf64_Sym *refsym) + attribute_hidden; + +static inline void +elf_machine_rela_relative (Elf64_Addr l_addr, const Elf64_Rela *reloc, + Elf64_Addr *const reloc_addr) +{ + *reloc_addr = l_addr + reloc->r_addend; +} + +/* Perform the relocation specified by RELOC and SYM (which is fully + resolved). MAP is the object containing the reloc. */ +static inline void +elf_machine_rela (struct link_map *map, + const Elf64_Rela *reloc, + const Elf64_Sym *sym, + const struct r_found_version *version, + Elf64_Addr *const reloc_addr) +{ + int r_type = ELF64_R_TYPE (reloc->r_info); + struct link_map *sym_map; + Elf64_Addr value; +#ifndef RTLD_BOOTSTRAP + const Elf64_Sym *const refsym = sym; + /* This is defined in rtld.c, but nowhere in the static libc.a; make the + reference weak so static programs can still link. This declaration + cannot be done when compiling rtld.c (i.e. #ifdef RTLD_BOOTSTRAP) + because rtld.c contains the common defn for _dl_rtld_map, which is + incompatible with a weak decl in the same file. */ + weak_extern (GL(dl_rtld_map)); +#endif + + if (r_type == R_PPC64_RELATIVE) + { +#ifndef RTLD_BOOTSTRAP + /* Already done in dynamic linker. */ + if (map != &GL(dl_rtld_map)) +#endif + *reloc_addr = map->l_addr + reloc->r_addend; + return; + } + + if (r_type == R_PPC64_NONE) + return; + + sym_map = RESOLVE_MAP (&sym, version, r_type); + value = 0; + if (sym_map) + { + if (sym) + value = sym_map->l_addr + sym->st_value; + value += reloc->r_addend; + } + + switch (r_type) + { + case R_PPC64_ADDR64: + case R_PPC64_GLOB_DAT: + *reloc_addr = value; + return; + + case R_PPC64_JMP_SLOT: + + elf_machine_fixup_plt (map, sym_map, reloc, reloc_addr, value); + return; + +#ifndef RTLD_BOOTSTRAP /* None of the following appear in ld.so */ + case R_PPC64_ADDR16_LO_DS: + if (dont_expect ((value & 3) != 0)) + _dl_reloc_overflow (map, "R_PPC64_ADDR16_LO_DS", + reloc_addr, sym, refsym); + *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr, + value, 0xfffc); + break; + + case R_PPC64_ADDR16_LO: + *(Elf64_Half *) reloc_addr = PPC_LO (value); + break; + + case R_PPC64_ADDR16_HI: + *(Elf64_Half *) reloc_addr = PPC_HI (value); + break; + + case R_PPC64_ADDR16_HA: + *(Elf64_Half *) reloc_addr = PPC_HA (value); + break; + + case R_PPC64_REL24: + { + Elf64_Addr delta = value - (Elf64_Xword) reloc_addr; + if (dont_expect ((delta + 0x2000000) >= 0x4000000 || (delta & 3) != 0)) + _dl_reloc_overflow (map, "R_PPC64_REL24", reloc_addr, sym, refsym); + *(Elf64_Word *) reloc_addr = BIT_INSERT (*(Elf64_Word *) reloc_addr, + delta, 0x3fffffc); + } + break; + + case R_PPC64_COPY: + if (dont_expect (sym == NULL)) + /* This can happen in trace mode when an object could not be found. */ + return; + if (dont_expect (sym->st_size > refsym->st_size + || (GL(dl_verbose) && sym->st_size < refsym->st_size))) + { + const char *strtab; + + strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); + _dl_error_printf ("%s: Symbol `%s' has different size" \ + " in shared object," \ + " consider re-linking\n", + _dl_argv[0] ?: "<program name unknown>", + strtab + refsym->st_name); + } + memcpy (reloc_addr, (char *) value, MIN (sym->st_size, refsym->st_size)); + return; + + case R_PPC64_UADDR64: + /* We are big-endian. */ + ((char *) reloc_addr)[0] = (value >> 56) & 0xff; + ((char *) reloc_addr)[1] = (value >> 48) & 0xff; + ((char *) reloc_addr)[2] = (value >> 40) & 0xff; + ((char *) reloc_addr)[3] = (value >> 32) & 0xff; + ((char *) reloc_addr)[4] = (value >> 24) & 0xff; + ((char *) reloc_addr)[5] = (value >> 16) & 0xff; + ((char *) reloc_addr)[6] = (value >> 8) & 0xff; + ((char *) reloc_addr)[7] = (value >> 0) & 0xff; + return; + + case R_PPC64_UADDR32: + /* We are big-endian. */ + ((char *) reloc_addr)[0] = (value >> 24) & 0xff; + ((char *) reloc_addr)[1] = (value >> 16) & 0xff; + ((char *) reloc_addr)[2] = (value >> 8) & 0xff; + ((char *) reloc_addr)[3] = (value >> 0) & 0xff; + return; + + case R_PPC64_ADDR24: + if (dont_expect ((value + 0x2000000) >= 0x4000000 || (value & 3) != 0)) + _dl_reloc_overflow (map, "R_PPC64_ADDR24", reloc_addr, sym, refsym); + *(Elf64_Word *) reloc_addr = BIT_INSERT (*(Elf64_Word *) reloc_addr, + value, 0x3fffffc); + break; + + case R_PPC64_ADDR16: + if (dont_expect ((value + 0x8000) >= 0x10000)) + _dl_reloc_overflow (map, "R_PPC64_ADDR16", reloc_addr, sym, refsym); + *(Elf64_Half *) reloc_addr = value; + break; + + case R_PPC64_UADDR16: + if (dont_expect ((value + 0x8000) >= 0x10000)) + _dl_reloc_overflow (map, "R_PPC64_UADDR16", reloc_addr, sym, refsym); + /* We are big-endian. */ + ((char *) reloc_addr)[0] = (value >> 8) & 0xff; + ((char *) reloc_addr)[1] = (value >> 0) & 0xff; + break; + + case R_PPC64_ADDR16_DS: + if (dont_expect ((value + 0x8000) >= 0x10000 || (value & 3) != 0)) + _dl_reloc_overflow (map, "R_PPC64_ADDR16_DS", reloc_addr, sym, refsym); + *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr, + value, 0xfffc); + break; + + case R_PPC64_ADDR16_HIGHER: + *(Elf64_Half *) reloc_addr = PPC_HIGHER (value); + break; + + case R_PPC64_ADDR16_HIGHEST: + *(Elf64_Half *) reloc_addr = PPC_HIGHEST (value); + break; + + case R_PPC64_ADDR16_HIGHERA: + *(Elf64_Half *) reloc_addr = PPC_HIGHERA (value); + break; + + case R_PPC64_ADDR16_HIGHESTA: + *(Elf64_Half *) reloc_addr = PPC_HIGHESTA (value); + break; + + case R_PPC64_ADDR14: + case R_PPC64_ADDR14_BRTAKEN: + case R_PPC64_ADDR14_BRNTAKEN: + { + Elf64_Word insn; + if (dont_expect ((value + 0x8000) >= 0x10000 || (value & 3) != 0)) + _dl_reloc_overflow (map, "R_PPC64_ADDR14", reloc_addr, sym, refsym); + insn = BIT_INSERT (*(Elf64_Word *) reloc_addr, value, 0xfffc); + if (r_type != R_PPC64_ADDR14) + { + insn &= ~(1 << 21); + if (r_type == R_PPC64_ADDR14_BRTAKEN) + insn |= 1 << 21; + if ((insn & (0x14 << 21)) == (0x04 << 21)) + insn |= 0x02 << 21; + else if ((insn & (0x14 << 21)) == (0x10 << 21)) + insn |= 0x08 << 21; + } + *(Elf64_Word *) reloc_addr = insn; + } + break; + + case R_PPC64_REL32: + *(Elf64_Word *) reloc_addr = value - (Elf64_Xword) reloc_addr; + return; +#endif /* !RTLD_BOOTSTRAP */ + + default: + _dl_reloc_bad_type (map, r_type, 0); + return; + } + MODIFIED_CODE_NOQUEUE (reloc_addr); +} + +#endif /* RESOLVE */ |