diff options
author | Ulrich Drepper <drepper@redhat.com> | 2002-09-05 10:28:51 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2002-09-05 10:28:51 +0000 |
commit | 92b27c7470ca2844e4e1265746cb56ad1f664df3 (patch) | |
tree | 989027a0a57d82034206d3e2bbb7a4151dd2e24f /sysdeps/powerpc/dl-machine.c | |
parent | 75e4a282218ce382d0fb3ff1ffef2108dd84fcce (diff) | |
download | glibc-92b27c7470ca2844e4e1265746cb56ad1f664df3.zip glibc-92b27c7470ca2844e4e1265746cb56ad1f664df3.tar.gz glibc-92b27c7470ca2844e4e1265746cb56ad1f664df3.tar.bz2 |
Update.
2002-07-29 Steven Munroe <sjmunroe@us.ibm.com>
* sysdeps/powerpc/__longjmp.S: Moved to...
* sysdeps/powerpc/powerpc32/__longjmp.S: ...here.
* sysdeps/powerpc/add_n.S: Moved to...
* sysdeps/powerpc/powerpc32/add_n.S: ...here.
* sysdeps/powerpc/addmul_1.S: Moved to...
* sysdeps/powerpc/powerpc32/addmul_1.S: ...here.
* sysdeps/powerpc/atomicity.h: Moved to...
* sysdeps/powerpc/powerpc32/atomicity.h: ...here.
* sysdeps/powerpc/backtrace.c: Moved to...
* sysdeps/powerpc/powerpc32/backtrace.c: ...here.
* sysdeps/powerpc/bp-asm.h: Moved to...
* sysdeps/powerpc/powerpc32/bp-asm.h: ...here.
* sysdeps/powerpc/bsd-_setjmp.S: Moved to...
* sysdeps/powerpc/powerpc32/bsd-_setjmp.S: ...here.
* sysdeps/powerpc/bsd-setjmp.S: Moved to...
* sysdeps/powerpc/powerpc32/bsd-setjmp.S: ...here.
* sysdeps/powerpc/dl-machine.c: Moved to...
* sysdeps/powerpc/powerpc32/dl-machine.c: ...here.
* sysdeps/powerpc/dl-machine.h: Moved to...
* sysdeps/powerpc/powerpc32/dl-machine.h: ...here.
* sysdeps/powerpc/dl-start.S: Moved to...
* sysdeps/powerpc/powerpc32/dl-start.S: ...here.
* sysdeps/powerpc/gprrest0.S: Moved to...
* sysdeps/powerpc/powerpc32/gprrest0.S: ...here.
* sysdeps/powerpc/gprrest1.S: Moved to...
* sysdeps/powerpc/powerpc32/gprrest1.S: ...here.
* sysdeps/powerpc/gprsave0.S: Moved to...
* sysdeps/powerpc/powerpc32/gprsave0.S: ...here.
* sysdeps/powerpc/gprsave1.S: Moved to...
* sysdeps/powerpc/powerpc32/gprsave1.S: ...here.
* sysdeps/powerpc/lshift.S: Moved to...
* sysdeps/powerpc/powerpc32/lshift.S: ...here.
* sysdeps/powerpc/memset.S: Moved to...
* sysdeps/powerpc/powerpc32/memset.S: ...here.
* sysdeps/powerpc/mul_1.S: Moved to...
* sysdeps/powerpc/powerpc32/mul_1.S: ...here.
* sysdeps/powerpc/ppc-mcount.S: Moved to...
* sysdeps/powerpc/powerpc32/ppc-mcount.S: ...here.
* sysdeps/powerpc/register-dump.h: Moved to...
* sysdeps/powerpc/powerpc32/register-dump.h: ...here.
* sysdeps/powerpc/rshift.S: Moved to...
* sysdeps/powerpc/powerpc32/rshift.S: ...here.
* sysdeps/powerpc/setjmp.S: Moved to...
* sysdeps/powerpc/powerpc32/setjmp.S: ...here.
* sysdeps/powerpc/stpcpy.S: Moved to...
* sysdeps/powerpc/powerpc32/stpcpy.S: ...here.
* sysdeps/powerpc/strchr.S: Moved to...
* sysdeps/powerpc/powerpc32/strchr.S: ...here.
* sysdeps/powerpc/strcmp.S: Moved to...
* sysdeps/powerpc/powerpc32/strcmp.S: ...here.
* sysdeps/powerpc/strcpy.S: Moved to...
* sysdeps/powerpc/powerpc32/strcpy.S: ...here.
* sysdeps/powerpc/strlen.S: Moved to...
* sysdeps/powerpc/powerpc32/strlen.S: ...here.
* sysdeps/powerpc/sub_n.S: Moved to...
* sysdeps/powerpc/powerpc32/sub_n.S: ...here.
* sysdeps/powerpc/submul_1.S: Moved to...
* sysdeps/powerpc/powerpc32/submul_1.S: ...here.
* sysdeps/powerpc/elf/bzero.S: Moved to...
* sysdeps/powerpc/powerpc32/elf/bzero.S: ...here.
* sysdeps/powerpc/elf/start.S: Moved to...
* sysdeps/powerpc/powerpc32/elf/start.S: ...here.
* sysdeps/powerpc/fpu/__longjmp.S: Moved to...
* sysdeps/powerpc/powerpc32/fpu/__longjmp.S: ...here.
* sysdeps/powerpc/fpu/fprrest.S: Moved to...
* sysdeps/powerpc/powerpc32/fpu/fprrest.S: ...here.
* sysdeps/powerpc/fpu/fprsave.S: Moved to...
* sysdeps/powerpc/powerpc32/fpu/fprsave.S: ...here.
* sysdeps/powerpc/fpu/setjmp.S: Moved to...
* sysdeps/powerpc/powerpc32/fpu/setjmp.S: ...here.
* sysdeps/powerpc/fpu/s_copysign.S: Moved to...
* sysdeps/powerpc/powerpc32/fpu/s_copysign.S: ...here.
* sysdeps/powerpc/fpu/s_copysignf.S: Moved to...
* sysdeps/powerpc/powerpc32/fpu/s_copysignf.S: ...here.
* sysdeps/unix/sysv/linux/powerpc/brk.S: Moved to...
* sysdeps/unix/sysv/linux/powerpc/powerpc32/brk.S: ...here.
* sysdeps/unix/sysv/linux/powerpc/clone.S: Moved to...
* sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: ...here.
* sysdeps/unix/sysv/linux/powerpc/glob64.c: Moved to...
* sysdeps/unix/sysv/linux/powerpc/powerpc32/glob64.c: ...here.
* sysdeps/unix/sysv/linux/powerpc/kernel_stat.h: Moved to...
* sysdeps/unix/sysv/linux/powerpc/powerpc32/kernel_stat.h: ...here.
* sysdeps/unix/sysv/linux/powerpc/socket.S: Moved to...
* sysdeps/unix/sysv/linux/powerpc/powerpc32/socket.S: ...here.
* sysdeps/unix/sysv/linux/powerpc/sysdep.h: Moved to...
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: ...here.
* sysdeps/unix/sysv/linux/powerpc/syscalls.list: Moved to...
* sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list: ...here.
Support PowerPC64. Separate powerpc into powerpc/powerpc32 and
powerpc/powerpc64.
2002-07-29 Steven Munroe <sjmunroe@us.ibm.com>
* FAQ.in: Add powerpc64 to supported targets list. Also state the
minimum gcc version is 3.2
* README: Add powerpc64 to supported targets list.
* configure.in: Change machine=powerpc to machine=powerpc/powerpc32.
Add powerpc64 and machine=powerpc/powerpc64.
(HAVE_ASM_GLOBAL_DOT_NAME): Define if linux*powerpc/powerpc64*.
* shlib-versions: Set DEFAULT version to 2.2.5 for powerpc64.
* sysdeps/powerpc/Dist: Remove dl-machine.c, dl-start.S, ppc-mcount.S,
gprsave1.S, gprsave0.S, gprrest1.S, and gprrest0.S.
* sysdeps/powerpc/powerpc32/Dist: New file.
* sysdeps/powerpc/Implies: Remove wordsize-32 and powerpc/soft-fp.
* sysdeps/powerpc/powerpc32/Implies: New file.
* sysdeps/powerpc/Makefile(cflags): Remove powerpc32 specific cflags.
($(with-fp) = no): Move test to powerpc32/Makefile.
($(subdir) = misc): Move to powerpc32/Makefile.
($(build-shared) = yes): Move to powerpc32/Makefile.
($(subdir) = csu): Move to powerpc32/Makefile.
(sysdep-rtld-routines): Remove dl-start. Moved these bits to ...
* sysdeps/powerpc/powerpc32/Makefile: New file.
* sysdeps/powerpc/Versions: Remove libgcc functions.
* sysdeps/powerpc/powerpc32/Versions: New file.
* sysdeps/powerpc/fpu/Makefile: Remove fprsave and fprrest.
* sysdeps/powerpc/powerpc32/fpu/Makefile: New file.
* sysdeps/unix/sysv/linux/configure.in (powerpc*):
Set arch_minimum_kernel=2.4.19 for powerpc/powerpc64. Also set
libc_cv_gcc_unwind_find_fde=yes only if !powerpc/powerpc64.
($machine): Add powerpc/powerpc64 to if ... | for
libc_cv_slibdir=/libc64.
(powerpc*): Set ldd_rewrite_script.
* sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed: New file.
* sysdeps/unix/sysv/linux/powerpc/Dist: Remove clone.S.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/Dist: New file.
Add clone.S.
* sysdeps/unix/sysv/linux/powerpc/Makefile: Remove oldgetrlimit64.
* sysdeps/unix/sysv/linux/powerpc/Versions: Remove GLIBC_2.0
functions. Remove GLIBC_2.2 functions except getrlimit and
setrlimit. Moved them to ...
* sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions: New file.
2002-09-04 Ulrich Drepper <drepper@redhat.com>
* libio/tst-atime.c: Include <errno.h>.
(do_test): Only perform fstatvfs check if ST_NOATIME is defined.
2002-09-03 Isamu Hasegawa <isamu@yamato.ibm.com>
* posix/regcomp.c (regcomp): Append "__restrict" modifier to avoid
warnings of some compilers.
(build_collating_symbol): Change the type of characters from
"unsigned char" to "char", and append a cast to "char*" pointer in
array subscript.
(build_collating_symbol): Likewise.
(build_equiv_class): Likewise.
(build_charclass): Likewise.
(re_compile_pattern): Remove incorrect cast.
(re_compile_fastmap_iter): Change the type of characters from
"unsigned char" to "char", and append a cast to "char*" pointer
in array subscript.
(parse_bracket_exp): Likewise.
* posix/regex_internal.c (re_string_construct_common): Likewise.
(re_string_allocate): Likewise.
(re_string_construct): Likewise.
(re_string_realloc_buffers): Likewise.
(build_wcs_buffer): Likewise.
(re_string_reconstruct): Likewise.
* posix/regex_internal.h: Change the type of characters in
re_string_t and bracket_elem_t from "unsigned char" to "char".
* posix/regexec.c (regexec): Append "__restrict" modifier to avoid
warnings of some compilers.
(transit_state_bkref_loop): Change the type of characters from
"unsigned char" to "char", and append a cast to "char*" pointer in
array subscript.
(check_node_accept_bytes): Likewise.
(find_collation_sequence_value): Likewise.
Diffstat (limited to 'sysdeps/powerpc/dl-machine.c')
-rw-r--r-- | sysdeps/powerpc/dl-machine.c | 538 |
1 files changed, 0 insertions, 538 deletions
diff --git a/sysdeps/powerpc/dl-machine.c b/sysdeps/powerpc/dl-machine.c deleted file mode 100644 index 28a31f6..0000000 --- a/sysdeps/powerpc/dl-machine.c +++ /dev/null @@ -1,538 +0,0 @@ -/* Machine-dependent ELF dynamic relocation functions. PowerPC version. - Copyright (C) 1995-2001, 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <unistd.h> -#include <string.h> -#include <sys/param.h> -#include <link.h> -#include <ldsodefs.h> -#include <elf/dynamic-link.h> -#include <dl-machine.h> -#include <stdio-common/_itoa.h> - -/* Because ld.so is now versioned, these functions can be in their own file; - no relocations need to be done to call them. - Of course, if ld.so is not versioned... */ -#if !(DO_VERSIONING - 0) -#error This will not work with versioning turned off, sorry. -#endif - - -/* Stuff for the PLT. */ -#define PLT_INITIAL_ENTRY_WORDS 18 -#define PLT_LONGBRANCH_ENTRY_WORDS 0 -#define PLT_TRAMPOLINE_ENTRY_WORDS 6 -#define PLT_DOUBLE_SIZE (1<<13) -#define PLT_ENTRY_START_WORDS(entry_number) \ - (PLT_INITIAL_ENTRY_WORDS + (entry_number)*2 \ - + ((entry_number) > PLT_DOUBLE_SIZE \ - ? ((entry_number) - PLT_DOUBLE_SIZE)*2 \ - : 0)) -#define PLT_DATA_START_WORDS(num_entries) PLT_ENTRY_START_WORDS(num_entries) - -/* Macros to build PowerPC opcode words. */ -#define OPCODE_ADDI(rd,ra,simm) \ - (0x38000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff)) -#define OPCODE_ADDIS(rd,ra,simm) \ - (0x3c000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff)) -#define OPCODE_ADD(rd,ra,rb) \ - (0x7c000214 | (rd) << 21 | (ra) << 16 | (rb) << 11) -#define OPCODE_B(target) (0x48000000 | ((target) & 0x03fffffc)) -#define OPCODE_BA(target) (0x48000002 | ((target) & 0x03fffffc)) -#define OPCODE_BCTR() 0x4e800420 -#define OPCODE_LWZ(rd,d,ra) \ - (0x80000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff)) -#define OPCODE_LWZU(rd,d,ra) \ - (0x84000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff)) -#define OPCODE_MTCTR(rd) (0x7C0903A6 | (rd) << 21) -#define OPCODE_RLWINM(ra,rs,sh,mb,me) \ - (0x54000000 | (rs) << 21 | (ra) << 16 | (sh) << 11 | (mb) << 6 | (me) << 1) - -#define OPCODE_LI(rd,simm) OPCODE_ADDI(rd,0,simm) -#define OPCODE_ADDIS_HI(rd,ra,value) \ - OPCODE_ADDIS(rd,ra,((value) + 0x8000) >> 16) -#define OPCODE_LIS_HI(rd,value) OPCODE_ADDIS_HI(rd,0,value) -#define OPCODE_SLWI(ra,rs,sh) OPCODE_RLWINM(ra,rs,sh,0,31-sh) - - -#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) - - -/* The idea here is that to conform to the ABI, we are supposed to try - to load dynamic objects between 0x10000 (we actually use 0x40000 as - the lower bound, to increase the chance of a memory reference from - a null pointer giving a segfault) and the program's load address; - this may allow us to use a branch instruction in the PLT rather - than a computed jump. The address is only used as a preference for - mmap, so if we get it wrong the worst that happens is that it gets - mapped somewhere else. */ - -ElfW(Addr) -__elf_preferred_address(struct link_map *loader, size_t maplength, - ElfW(Addr) mapstartpref) -{ - ElfW(Addr) low, high; - struct link_map *l; - - /* If the object has a preference, load it there! */ - if (mapstartpref != 0) - return mapstartpref; - - /* Otherwise, quickly look for a suitable gap between 0x3FFFF and - 0x70000000. 0x3FFFF is so that references off NULL pointers will - cause a segfault, 0x70000000 is just paranoia (it should always - be superceded by the program's load address). */ - low = 0x0003FFFF; - high = 0x70000000; - for (l = GL(dl_loaded); l; l = l->l_next) - { - ElfW(Addr) mapstart, mapend; - mapstart = l->l_map_start & ~(GL(dl_pagesize) - 1); - mapend = l->l_map_end | (GL(dl_pagesize) - 1); - assert (mapend > mapstart); - - /* Prefer gaps below the main executable, note that l == - _dl_loaded does not work for static binaries loading - e.g. libnss_*.so. */ - if ((mapend >= high || l->l_type == lt_executable) - && high >= mapstart) - high = mapstart; - else if (mapend >= low && low >= mapstart) - low = mapend; - else if (high >= mapend && mapstart >= low) - { - if (high - mapend >= mapstart - low) - low = mapend; - else - high = mapstart; - } - } - - high -= 0x10000; /* Allow some room between objects. */ - maplength = (maplength | (GL(dl_pagesize) - 1)) + 1; - if (high <= low || high - low < maplength ) - return 0; - return high - maplength; /* Both high and maplength are page-aligned. */ -} - -/* Set up the loaded object described by L so its unrelocated PLT - entries will jump to the on-demand fixup code in dl-runtime.c. - Also install a small trampoline to be used by entries that have - been relocated to an address too far away for a single branch. */ - -/* There are many kinds of PLT entries: - - (1) A direct jump to the actual routine, either a relative or - absolute branch. These are set up in __elf_machine_fixup_plt. - - (2) Short lazy entries. These cover the first 8192 slots in - the PLT, and look like (where 'index' goes from 0 to 8191): - - li %r11, index*4 - b &plt[PLT_TRAMPOLINE_ENTRY_WORDS+1] - - (3) Short indirect jumps. These replace (2) when a direct jump - wouldn't reach. They look the same except that the branch - is 'b &plt[PLT_LONGBRANCH_ENTRY_WORDS]'. - - (4) Long lazy entries. These cover the slots when a short entry - won't fit ('index*4' overflows its field), and look like: - - lis %r11, %hi(index*4 + &plt[PLT_DATA_START_WORDS]) - lwzu %r12, %r11, %lo(index*4 + &plt[PLT_DATA_START_WORDS]) - b &plt[PLT_TRAMPOLINE_ENTRY_WORDS] - bctr - - (5) Long indirect jumps. These replace (4) when a direct jump - wouldn't reach. They look like: - - lis %r11, %hi(index*4 + &plt[PLT_DATA_START_WORDS]) - lwz %r12, %r11, %lo(index*4 + &plt[PLT_DATA_START_WORDS]) - mtctr %r12 - bctr - - (6) Long direct jumps. These are used when thread-safety is not - required. They look like: - - lis %r12, %hi(finaladdr) - addi %r12, %r12, %lo(finaladdr) - mtctr %r12 - bctr - - - The lazy entries, (2) and (4), are set up here in - __elf_machine_runtime_setup. (1), (3), and (5) are set up in - __elf_machine_fixup_plt. (1), (3), and (6) can also be constructed - in __process_machine_rela. - - The reason for the somewhat strange construction of the long - entries, (4) and (5), is that we need to ensure thread-safety. For - (1) and (3), this is obvious because only one instruction is - changed and the PPC architecture guarantees that aligned stores are - atomic. For (5), this is more tricky. When changing (4) to (5), - the `b' instruction is first changed to to `mtctr'; this is safe - and is why the `lwzu' instruction is not just a simple `addi'. - Once this is done, and is visible to all processors, the `lwzu' can - safely be changed to a `lwz'. */ -int -__elf_machine_runtime_setup (struct link_map *map, int lazy, int profile) -{ - if (map->l_info[DT_JMPREL]) - { - Elf32_Word i; - Elf32_Word *plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]); - Elf32_Word num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val - / sizeof (Elf32_Rela)); - Elf32_Word rel_offset_words = PLT_DATA_START_WORDS (num_plt_entries); - Elf32_Word data_words = (Elf32_Word) (plt + rel_offset_words); - Elf32_Word size_modified; - - extern void _dl_runtime_resolve (void); - extern void _dl_prof_resolve (void); - - /* Convert the index in r11 into an actual address, and get the - word at that address. */ - plt[PLT_LONGBRANCH_ENTRY_WORDS] = OPCODE_ADDIS_HI (11, 11, data_words); - plt[PLT_LONGBRANCH_ENTRY_WORDS + 1] = OPCODE_LWZ (11, data_words, 11); - - /* Call the procedure at that address. */ - plt[PLT_LONGBRANCH_ENTRY_WORDS + 2] = OPCODE_MTCTR (11); - plt[PLT_LONGBRANCH_ENTRY_WORDS + 3] = OPCODE_BCTR (); - - if (lazy) - { - Elf32_Word *tramp = plt + PLT_TRAMPOLINE_ENTRY_WORDS; - Elf32_Word dlrr = (Elf32_Word)(profile - ? _dl_prof_resolve - : _dl_runtime_resolve); - Elf32_Word offset; - - 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; - - /* For the long entries, subtract off data_words. */ - tramp[0] = OPCODE_ADDIS_HI (11, 11, -data_words); - tramp[1] = OPCODE_ADDI (11, 11, -data_words); - - /* Multiply index of entry by 3 (in r11). */ - tramp[2] = OPCODE_SLWI (12, 11, 1); - tramp[3] = OPCODE_ADD (11, 12, 11); - if (dlrr <= 0x01fffffc || dlrr >= 0xfe000000) - { - /* Load address of link map in r12. */ - tramp[4] = OPCODE_LI (12, (Elf32_Word) map); - tramp[5] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) map); - - /* Call _dl_runtime_resolve. */ - tramp[6] = OPCODE_BA (dlrr); - } - else - { - /* Get address of _dl_runtime_resolve in CTR. */ - tramp[4] = OPCODE_LI (12, dlrr); - tramp[5] = OPCODE_ADDIS_HI (12, 12, dlrr); - tramp[6] = OPCODE_MTCTR (12); - - /* Load address of link map in r12. */ - tramp[7] = OPCODE_LI (12, (Elf32_Word) map); - tramp[8] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) map); - - /* Call _dl_runtime_resolve. */ - tramp[9] = OPCODE_BCTR (); - } - - /* Set up the lazy PLT entries. */ - offset = PLT_INITIAL_ENTRY_WORDS; - i = 0; - while (i < num_plt_entries && i < PLT_DOUBLE_SIZE) - { - plt[offset ] = OPCODE_LI (11, i * 4); - plt[offset+1] = OPCODE_B ((PLT_TRAMPOLINE_ENTRY_WORDS + 2 - - (offset+1)) - * 4); - i++; - offset += 2; - } - while (i < num_plt_entries) - { - plt[offset ] = OPCODE_LIS_HI (11, i * 4 + data_words); - plt[offset+1] = OPCODE_LWZU (12, i * 4 + data_words, 11); - plt[offset+2] = OPCODE_B ((PLT_TRAMPOLINE_ENTRY_WORDS - - (offset+2)) - * 4); - plt[offset+3] = OPCODE_BCTR (); - i++; - offset += 4; - } - } - - /* Now, we've modified code. 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. */ - - size_modified = lazy ? rel_offset_words : 6; - for (i = 0; i < size_modified; i += 4) - PPC_DCBST (plt + i); - PPC_DCBST (plt + size_modified - 1); - PPC_SYNC; - PPC_ICBI (plt); - PPC_ICBI (plt + size_modified - 1); - PPC_ISYNC; - } - - return lazy; -} - -Elf32_Addr -__elf_machine_fixup_plt(struct link_map *map, const Elf32_Rela *reloc, - Elf32_Addr *reloc_addr, Elf32_Addr finaladdr) -{ - Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr; - if (delta << 6 >> 6 == delta) - *reloc_addr = OPCODE_B (delta); - else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000) - *reloc_addr = OPCODE_BA (finaladdr); - else - { - Elf32_Word *plt, *data_words; - Elf32_Word index, offset, num_plt_entries; - - num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val - / sizeof(Elf32_Rela)); - plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]); - offset = reloc_addr - plt; - index = (offset - PLT_INITIAL_ENTRY_WORDS)/2; - data_words = plt + PLT_DATA_START_WORDS (num_plt_entries); - - reloc_addr += 1; - - if (index < PLT_DOUBLE_SIZE) - { - data_words[index] = finaladdr; - PPC_SYNC; - *reloc_addr = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS - (offset+1)) - * 4); - } - else - { - index -= (index - PLT_DOUBLE_SIZE)/2; - - data_words[index] = finaladdr; - PPC_SYNC; - - reloc_addr[1] = OPCODE_MTCTR (12); - MODIFIED_CODE_NOQUEUE (reloc_addr + 1); - PPC_SYNC; - - reloc_addr[0] = OPCODE_LWZ (12, - (Elf32_Word) (data_words + index), 11); - } - } - MODIFIED_CODE (reloc_addr); - return finaladdr; -} - -static void -dl_reloc_overflow (struct link_map *map, - const char *name, - Elf32_Addr *const reloc_addr, - const Elf32_Sym *sym, - const Elf32_Sym *refsym) -{ - char buffer[128]; - char *t; - const Elf32_Sym *errsym = sym ?: refsym; - t = stpcpy (buffer, name); - t = stpcpy (t, " relocation at 0x00000000"); - _itoa_word ((unsigned) reloc_addr, t, 16, 0); - if (errsym) - { - const char *strtab; - - strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); - t = stpcpy (t, " for symbol `"); - t = stpcpy (t, strtab + errsym->st_name); - t = stpcpy (t, "'"); - } - t = stpcpy (t, " out of range"); - _dl_signal_error (0, map->l_name, NULL, buffer); -} - -void -__process_machine_rela (struct link_map *map, - const Elf32_Rela *reloc, - const Elf32_Sym *sym, - const Elf32_Sym *refsym, - Elf32_Addr *const reloc_addr, - Elf32_Addr const finaladdr, - int rinfo) -{ - switch (rinfo) - { - case R_PPC_NONE: - return; - - case R_PPC_ADDR32: - case R_PPC_UADDR32: - case R_PPC_GLOB_DAT: - case R_PPC_RELATIVE: - *reloc_addr = finaladdr; - return; - - case R_PPC_ADDR24: - if (finaladdr > 0x01fffffc && finaladdr < 0xfe000000) - dl_reloc_overflow (map, "R_PPC_ADDR24", reloc_addr, sym, refsym); - *reloc_addr = (*reloc_addr & 0xfc000003) | (finaladdr & 0x3fffffc); - break; - - case R_PPC_ADDR16: - case R_PPC_UADDR16: - if (finaladdr > 0x7fff && finaladdr < 0x8000) - dl_reloc_overflow (map, "R_PPC_ADDR16", reloc_addr, sym, refsym); - *(Elf32_Half*) reloc_addr = finaladdr; - break; - - case R_PPC_ADDR16_LO: - *(Elf32_Half*) reloc_addr = finaladdr; - break; - - case R_PPC_ADDR16_HI: - *(Elf32_Half*) reloc_addr = finaladdr >> 16; - break; - - case R_PPC_ADDR16_HA: - *(Elf32_Half*) reloc_addr = (finaladdr + 0x8000) >> 16; - break; - - case R_PPC_ADDR14: - case R_PPC_ADDR14_BRTAKEN: - case R_PPC_ADDR14_BRNTAKEN: - if (finaladdr > 0x7fff && finaladdr < 0x8000) - dl_reloc_overflow (map, "R_PPC_ADDR14", reloc_addr, sym, refsym); - *reloc_addr = (*reloc_addr & 0xffff0003) | (finaladdr & 0xfffc); - if (rinfo != R_PPC_ADDR14) - *reloc_addr = ((*reloc_addr & 0xffdfffff) - | ((rinfo == R_PPC_ADDR14_BRTAKEN) - ^ (finaladdr >> 31)) << 21); - break; - - case R_PPC_REL24: - { - Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr; - if (delta << 6 >> 6 != delta) - dl_reloc_overflow (map, "R_PPC_REL24", reloc_addr, sym, refsym); - *reloc_addr = (*reloc_addr & 0xfc000003) | (delta & 0x3fffffc); - } - break; - - case R_PPC_COPY: - if (sym == NULL) - /* This can happen in trace mode when an object could not be - found. */ - return; - if (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, onsider re-linking\n", - rtld_progname ?: "<program name unknown>", - strtab + refsym->st_name); - } - memcpy (reloc_addr, (char *) finaladdr, MIN (sym->st_size, - refsym->st_size)); - return; - - case R_PPC_REL32: - *reloc_addr = finaladdr - (Elf32_Word) reloc_addr; - return; - - case R_PPC_JMP_SLOT: - /* It used to be that elf_machine_fixup_plt was used here, - but that doesn't work when ld.so relocates itself - for the second time. On the bright side, there's - no need to worry about thread-safety here. */ - { - Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr; - if (delta << 6 >> 6 == delta) - *reloc_addr = OPCODE_B (delta); - else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000) - *reloc_addr = OPCODE_BA (finaladdr); - else - { - Elf32_Word *plt, *data_words; - Elf32_Word index, offset, num_plt_entries; - - plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]); - offset = reloc_addr - plt; - - if (offset < PLT_DOUBLE_SIZE*2 + PLT_INITIAL_ENTRY_WORDS) - { - index = (offset - PLT_INITIAL_ENTRY_WORDS)/2; - num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val - / sizeof(Elf32_Rela)); - data_words = plt + PLT_DATA_START_WORDS (num_plt_entries); - data_words[index] = finaladdr; - reloc_addr[0] = OPCODE_LI (11, index * 4); - reloc_addr[1] = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS - - (offset+1)) - * 4); - MODIFIED_CODE_NOQUEUE (reloc_addr + 1); - } - else - { - reloc_addr[0] = OPCODE_LIS_HI (12, finaladdr); - reloc_addr[1] = OPCODE_ADDI (12, 12, finaladdr); - reloc_addr[2] = OPCODE_MTCTR (12); - reloc_addr[3] = OPCODE_BCTR (); - MODIFIED_CODE_NOQUEUE (reloc_addr + 3); - } - } - } - break; - - default: - _dl_reloc_bad_type (map, rinfo, 0); - return; - } - - MODIFIED_CODE_NOQUEUE (reloc_addr); -} |