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David S. Miller
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Ulrich Drepper
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Feb 10, 2010
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| /* Machine-dependent ELF indirect relocation inline functions. | ||
| SPARC 32-bit version. | ||
| Copyright (C) 2010 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. */ | ||
|
|
||
| #ifndef _DL_IREL_H | ||
| #define _DL_IREL_H | ||
|
|
||
| #include <stdio.h> | ||
| #include <unistd.h> | ||
| #include <dl-plt.h> | ||
|
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| #define ELF_MACHINE_IRELA 1 | ||
|
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||
| static inline void | ||
| __attribute ((always_inline)) | ||
| elf_irela (const Elf32_Rela *reloc) | ||
| { | ||
| unsigned int r_type = ELF32_R_TYPE (reloc->r_info); | ||
|
|
||
| if (__builtin_expect (r_type == R_SPARC_IRELATIVE, 1)) | ||
| { | ||
| Elf32_Addr *const reloc_addr = (void *) reloc->r_offset; | ||
| Elf32_Addr value = ((Elf32_Addr (*) (void)) reloc->r_addend) (); | ||
| *reloc_addr = value; | ||
| } | ||
| else if (__builtin_expect (r_type == R_SPARC_JMP_IREL, 1)) | ||
| { | ||
| Elf32_Addr *const reloc_addr = (void *) reloc->r_offset; | ||
| Elf32_Addr value = ((Elf32_Addr (*) (void)) reloc->r_addend) (); | ||
|
|
||
| sparc_fixup_plt (reloc, reloc_addr, value, 0, 1); | ||
| } | ||
| else if (r_type == R_SPARC_NONE) | ||
| ; | ||
| else | ||
| __libc_fatal ("unexpected reloc type in static binary"); | ||
| } | ||
|
|
||
| #endif /* dl-irel.h */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* PLT fixups. Sparc 32-bit version. | ||
| Copyright (C) 1996-2003, 2004, 2005, 2006, 2007, 2010 | ||
| 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. */ | ||
|
|
||
| /* Some SPARC opcodes we need to use for self-modifying code. */ | ||
| #define OPCODE_NOP 0x01000000 /* nop */ | ||
| #define OPCODE_CALL 0x40000000 /* call ?; add PC-rel word address */ | ||
| #define OPCODE_SETHI_G1 0x03000000 /* sethi ?, %g1; add value>>10 */ | ||
| #define OPCODE_JMP_G1 0x81c06000 /* jmp %g1+?; add lo 10 bits of value */ | ||
| #define OPCODE_SAVE_SP 0x9de3bfa8 /* save %sp, -(16+6)*4, %sp */ | ||
| #define OPCODE_BA 0x30800000 /* b,a ?; add PC-rel word address */ | ||
|
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| static inline __attribute__ ((always_inline)) Elf32_Addr | ||
| sparc_fixup_plt (const Elf32_Rela *reloc, Elf32_Addr *reloc_addr, | ||
| Elf32_Addr value, int t, int do_flush) | ||
| { | ||
| Elf32_Sword disp = value - (Elf32_Addr) reloc_addr; | ||
|
|
||
| if (0 && disp >= -0x800000 && disp < 0x800000) | ||
| { | ||
| /* Don't need to worry about thread safety. We're writing just one | ||
| instruction. */ | ||
|
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||
| reloc_addr[0] = OPCODE_BA | ((disp >> 2) & 0x3fffff); | ||
| if (do_flush) | ||
| __asm __volatile ("flush %0" : : "r"(reloc_addr)); | ||
| } | ||
| else | ||
| { | ||
| /* For thread safety, write the instructions from the bottom and | ||
| flush before we overwrite the critical "b,a". This of course | ||
| need not be done during bootstrapping, since there are no threads. | ||
| But we also can't tell if we _can_ use flush, so don't. */ | ||
|
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||
| reloc_addr += t; | ||
| reloc_addr[1] = OPCODE_JMP_G1 | (value & 0x3ff); | ||
| if (do_flush) | ||
| __asm __volatile ("flush %0+4" : : "r"(reloc_addr)); | ||
|
|
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| reloc_addr[0] = OPCODE_SETHI_G1 | (value >> 10); | ||
| if (do_flush) | ||
| __asm __volatile ("flush %0" : : "r"(reloc_addr)); | ||
| } | ||
|
|
||
| return value; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /* Machine-dependent ELF indirect relocation inline functions. | ||
| SPARC 64-bit version. | ||
| Copyright (C) 2010 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. */ | ||
|
|
||
| #ifndef _DL_IREL_H | ||
| #define _DL_IREL_H | ||
|
|
||
| #include <stdio.h> | ||
| #include <unistd.h> | ||
| #include <dl-plt.h> | ||
|
|
||
| #define ELF_MACHINE_IRELA 1 | ||
|
|
||
| static inline void | ||
| __attribute ((always_inline)) | ||
| elf_irela (const Elf64_Rela *reloc) | ||
| { | ||
| unsigned int r_type = (reloc->r_info & 0xff); | ||
|
|
||
| if (__builtin_expect (r_type == R_SPARC_IRELATIVE, 1)) | ||
| { | ||
| Elf64_Addr *const reloc_addr = (void *) reloc->r_offset; | ||
| Elf64_Addr value = ((Elf64_Addr (*) (void)) reloc->r_addend) (); | ||
| *reloc_addr = value; | ||
| } | ||
| else if (__builtin_expect (r_type == R_SPARC_JMP_IREL, 1)) | ||
| { | ||
| Elf64_Addr *const reloc_addr = (void *) reloc->r_offset; | ||
| Elf64_Addr value = ((Elf64_Addr (*) (void)) reloc->r_addend) (); | ||
| struct link_map map = { .l_addr = 0 }; | ||
|
|
||
| /* 'high' is always zero, for large PLT entries the linker | ||
| emits an R_SPARC_IRELATIVE. */ | ||
| sparc64_fixup_plt (&map, reloc, reloc_addr, value, 0, 0); | ||
| } | ||
| else if (r_type == R_SPARC_NONE) | ||
| ; | ||
| else | ||
| __libc_fatal ("unexpected reloc type in static binary"); | ||
| } | ||
|
|
||
| #endif /* dl-irel.h */ |
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