* elf/dl-runtime.c (fixup, profile_fixup): The final arg to _dl_lookup_*symbol is DL_LOOKUP_NOPLT not ELF_MACHINE_JMP_SLOT. * elf/elf.h (EM_SPARC64): Remove. (EM_SPARC32PLUS, EM_SPARCV9): Add. (HWCAP_SPARC_V9): Add. * elf/ldsodefs.h (_dl_hwcap): Declare. * sysdeps/sparc/sparc32/dl-machine.h (_dl_hwcap, _dl_hwcap_mask): Weaken so dlopen from static progies works. (WEAKADDR): New macro. (elf_machine_matches_host): Accept EM_SPARC32PLUS on a v9 cpu. (LD_SO_PRELOAD): New macro. (elf_machine_fixup_plt): Cope with weak _dl_hwcap. (elf_machine_rela): Weaken _dl_rtld_map. * sysdeps/unix/sysv/linux/sparc/sparc32/clone.S: Rename __libc_clone to __clone, and remove the later's alias. * sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c: Copy to/from the kernel's structure.
1998-04-06 Jakub Jelinek <jj@sunsite.ms.mff.cuni.cz> * elf/dl-runtime.c (fixup, profile_fixup): The final arg to _dl_lookup_*symbol is DL_LOOKUP_NOPLT not ELF_MACHINE_JMP_SLOT. * elf/elf.h (EM_SPARC64): Remove. (EM_SPARC32PLUS, EM_SPARCV9): Add. (HWCAP_SPARC_V9): Add. * elf/ldsodefs.h (_dl_hwcap): Declare. * sysdeps/sparc/sparc32/dl-machine.h (_dl_hwcap, _dl_hwcap_mask): Weaken so dlopen from static progies works. (WEAKADDR): New macro. (elf_machine_matches_host): Accept EM_SPARC32PLUS on a v9 cpu. (LD_SO_PRELOAD): New macro. (elf_machine_fixup_plt): Cope with weak _dl_hwcap. (elf_machine_rela): Weaken _dl_rtld_map. * sysdeps/unix/sysv/linux/sparc/sparc32/clone.S: Rename __libc_clone to __clone, and remove the later's alias. * sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c: Copy to/from the kernel's structure. * sysdeps/generic/libc-start.c: Allow init and fini to be null.
This commit is contained in:
Richard Henderson
parent
a55400166d
commit
4194bc660f
27
ChangeLog
27
ChangeLog
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@ -1,5 +1,32 @@
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1998-04-06 Jakub Jelinek <jj@sunsite.ms.mff.cuni.cz>
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* elf/dl-runtime.c (fixup, profile_fixup): The final arg to
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_dl_lookup_*symbol is DL_LOOKUP_NOPLT not ELF_MACHINE_JMP_SLOT.
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* elf/elf.h (EM_SPARC64): Remove.
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(EM_SPARC32PLUS, EM_SPARCV9): Add.
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(HWCAP_SPARC_V9): Add.
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* elf/ldsodefs.h (_dl_hwcap): Declare.
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* sysdeps/sparc/sparc32/dl-machine.h (_dl_hwcap, _dl_hwcap_mask):
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Weaken so dlopen from static progies works.
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(WEAKADDR): New macro.
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(elf_machine_matches_host): Accept EM_SPARC32PLUS on a v9 cpu.
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(LD_SO_PRELOAD): New macro.
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(elf_machine_fixup_plt): Cope with weak _dl_hwcap.
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(elf_machine_rela): Weaken _dl_rtld_map.
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* sysdeps/unix/sysv/linux/sparc/sparc32/clone.S: Rename __libc_clone
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to __clone, and remove the later's alias.
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* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise.
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* sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c: Copy to/from
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the kernel's structure.
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1998-04-06 Richard Henderson <rth@cygnus.com>
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* sysdeps/generic/libc-start.c: Allow init and fini to be null.
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* sysdeps/sparc/sparc32/elf.S: Rewrite for __libc_start_main.
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* sysdeps/sparc/sparc64/elf.S: Likewise.
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@ -128,13 +128,13 @@ fixup (
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{
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value = _dl_lookup_versioned_symbol(strtab + sym->st_name,
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&sym, scope, l->l_name,
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version, ELF_MACHINE_JMP_SLOT);
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version, DL_LOOKUP_NOPLT);
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break;
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}
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}
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case 0:
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value = _dl_lookup_symbol (strtab + sym->st_name, &sym, scope,
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l->l_name, ELF_MACHINE_JMP_SLOT);
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l->l_name, DL_LOOKUP_NOPLT);
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}
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/* Currently value contains the base load address of the object
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@ -205,13 +205,13 @@ profile_fixup (
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value = _dl_lookup_versioned_symbol(strtab + sym->st_name,
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&sym, scope, l->l_name,
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version,
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ELF_MACHINE_JMP_SLOT);
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DL_LOOKUP_NOPLT);
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break;
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}
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}
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case 0:
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value = _dl_lookup_symbol (strtab + sym->st_name, &sym, scope,
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l->l_name, ELF_MACHINE_JMP_SLOT);
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l->l_name, DL_LOOKUP_NOPLT);
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}
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/* Currently value contains the base load address of the object
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@ -162,11 +162,14 @@ typedef struct
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#define EM_S370 9 /* Amdahl */
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#define EM_MIPS_RS4_BE 10 /* MIPS R4000 big-endian */
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#define EM_SPARC64 11 /* SPARC v9 (not official) 64-bit */
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#define EM_PARISC 15 /* HPPA */
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#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
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#define EM_PPC 20 /* PowerPC */
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#define EM_SPARCV9 43 /* SPARC v9 64-bit */
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/* If it is necessary to assign new unofficial EM_* values, please
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pick large random numbers (0x8523, 0xa7f2, etc.) to minimize the
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chances of collision with official or non-GNU unofficial values. */
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@ -808,6 +811,7 @@ typedef struct
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#define HWCAP_SPARC_STBAR 2
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#define HWCAP_SPARC_SWAP 4
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#define HWCAP_SPARC_MULDIV 8
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#define HWCAP_SPARC_V9 16 /* The cpu is v9, so v8plus is ok. */
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/* MIPS R3000 specific definitions. */
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@ -140,6 +140,9 @@ extern int _dl_debug_files;
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/* Expect cache ID. */
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extern int _dl_correct_cache_id;
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/* Mask for hardware capabilities that are available. */
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extern unsigned long int _dl_hwcap;
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/* Mask for important hardware capabilities we honour. */
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extern unsigned long int _dl_hwcap_mask;
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@ -40,13 +40,13 @@ __libc_start_main (int (*main) (int, char **, char **), int argc,
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__libc_multiple_libcs = dummy_addr && !_dl_starting_up;
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#endif
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/* Set the global _environ variable correctly. */
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__environ = &argv[argc + 1];
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/* Register the destructor of the dynamic linker if there is any. */
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if (rtld_fini != NULL)
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atexit (rtld_fini);
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/* Set the global _environ variable correctly. */
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__environ = &argv[argc + 1];
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/* Call the initializer of the libc. */
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#ifdef PIC
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if (_dl_debug_impcalls)
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@ -54,15 +54,17 @@ __libc_start_main (int (*main) (int, char **, char **), int argc,
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#endif
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__libc_init_first (argc, argv, __environ);
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/* Call the initializer of the program. */
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/* Register the destructor of the program, if any. */
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if (fini)
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atexit (fini);
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/* Call the initializer of the program, if any. */
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#ifdef PIC
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if (_dl_debug_impcalls)
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_dl_debug_message (1, "\ninitialize program: ", argv[0], "\n\n", NULL);
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#endif
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(*init) ();
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/* Register the destructor of the program. */
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atexit (fini);
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if (init)
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(*init) ();
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#ifdef PIC
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if (_dl_debug_impcalls)
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@ -21,8 +21,8 @@
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#include <assert.h>
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#include <string.h>
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#include <link.h>
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#include <sys/param.h>
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#include <elf/ldsodefs.h>
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/* Some SPARC opcodes we need to use for self-modifying code. */
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@ -33,11 +33,36 @@
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#define OPCODE_SAVE_SP 0x9de3bfa8 /* save %sp, -(16+6)*4, %sp */
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/* To allow static progies to link properly, define these as weak. */
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weak_extern(_dl_hwcap);
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weak_extern(_dl_hwcap_mask);
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/* Protect some broken versions of gcc from misinterpreting weak addresses. */
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#define WEAKADDR(x) ({ __typeof(x) *_px = &x; \
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__asm ("" : "=r" (_px) : "0" (_px)); \
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_px })
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/* Use a different preload file when running in 32-bit emulation mode
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on a 64-bit host. */
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#define LD_SO_PRELOAD ((_dl_hwcap & HWCAP_SPARC_V9) ? "/etc/ld.so.preload32" \
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: "/etc/ld.so.preload")
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/* Return nonzero iff E_MACHINE is compatible with the running host. */
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static inline int
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elf_machine_matches_host (Elf32_Half e_machine)
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{
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return e_machine == EM_SPARC;
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if (e_machine == EM_SPARC)
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return 1;
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else if (e_machine == EM_SPARC32PLUS)
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{
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unsigned long *hwcap = WEAKADDR(_dl_hwcap);
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return hwcap && (*hwcap & _dl_hwcap_mask & HWCAP_SPARC_V9);
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}
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else
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return 0;
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}
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@ -240,7 +265,14 @@ static inline void
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elf_machine_fixup_plt (struct link_map *map, const Elf32_Rela *reloc,
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Elf32_Addr *reloc_addr, Elf32_Addr value)
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{
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extern unsigned long _dl_hwcap;
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#ifndef RTLD_BOOTSTRAP
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/* Note that we don't mask the hwcap here, as the flush is essential to
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functionality on those cpu's that implement it. */
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unsigned long *hwcap = WEAKADDR(_dl_hwcap);
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int do_flush = (!hwcap || (*hwcap & HWCAP_SPARC_FLUSH));
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#else
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int do_flush = 0;
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#endif
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/* For thread safety, write the instructions from the bottom and
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flush before we overwrite the critical "b,a". This of course
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@ -248,16 +280,12 @@ elf_machine_fixup_plt (struct link_map *map, const Elf32_Rela *reloc,
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But we also can't tell if we _can_ use flush, so don't. */
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reloc_addr[2] = OPCODE_JMP_G1 | (value & 0x3ff);
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#ifndef RTLD_BOOTSTRAP
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if (_dl_hwcap & HWCAP_SPARC_FLUSH)
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if (do_flush)
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__asm __volatile ("flush %0+8" : : "r"(reloc_addr));
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#endif
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reloc_addr[1] = OPCODE_SETHI_G1 | (value >> 10);
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#ifndef RTLD_BOOTSTRAP
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if (_dl_hwcap & HWCAP_SPARC_FLUSH)
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if (do_flush)
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__asm __volatile ("flush %0+4" : : "r"(reloc_addr));
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#endif
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}
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/* Return the final value of a plt relocation. */
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@ -278,6 +306,15 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
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const Elf32_Sym *sym, const struct r_found_version *version,
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Elf32_Addr *const reloc_addr)
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{
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#ifndef RTLD_BOOTSTRAP
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/* This is defined in rtld.c, but nowhere in the static libc.a; make the
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reference weak so static programs can still link. This declaration
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cannot be done when compiling rtld.c (i.e. #ifdef RTLD_BOOTSTRAP)
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because rtld.c contains the common defn for _dl_rtld_map, which is
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incompatible with a weak decl in the same file. */
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weak_extern (_dl_rtld_map);
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#endif
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if (ELF32_R_TYPE (reloc->r_info) == R_SPARC_RELATIVE)
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{
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#ifndef RTLD_BOOTSTRAP
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@ -1,4 +1,4 @@
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/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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/* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
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Contributed by Richard Henderson (rth@tamu.edu).
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The GNU C Library is free software; you can redistribute it and/or
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@ -26,21 +26,18 @@
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.text
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.align 4
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.globl __libc_clone
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.type __libc_clone,@function
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.weak clone
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__clone = __libc_clone
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clone = __libc_clone
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.globl __clone
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.type __clone,@function
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__libc_clone:
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__clone:
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save %sp,-96,%sp
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/* sanity check arguments */
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tst %i0
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be __clone_syscall_error
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tst %i1
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be __clone_syscall_error
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nop
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be .Lerror
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tst %i1
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be .Lerror
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nop
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/* Do the system call */
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mov %i1,%o1
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@ -48,23 +45,31 @@ __libc_clone:
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set __NR_clone,%g1
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ta 0x10
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bcs __clone_syscall_error
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tst %o1
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tst %o1
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bne __thread_start
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nop
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nop
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mov %o0,%i0
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ret
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restore
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restore
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__clone_syscall_error:
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.Lerror:
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call __errno_location
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set EINVAL,%i0
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set EINVAL,%i0
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st %i0,[%o0]
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mov -1,%i0
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ret
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restore
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restore
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.size __clone, .-__clone
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.type __thread_start,@function
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__thread_start:
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call %i0
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||||
mov %i3,%o0
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mov %i3,%o0
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||||
call _exit,0
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nop
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nop
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||||
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||||
.size __thread_start, .-__thread_start
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||||
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weak_alias(__clone, clone)
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||||
|
|
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|||
|
|
@ -21,120 +21,65 @@
|
|||
#include <syscall.h>
|
||||
#include <sys/signal.h>
|
||||
#include <errno.h>
|
||||
#include <kernel_sigaction.h>
|
||||
|
||||
/* The variable is shared between all wrappers around signal handling
|
||||
functions which have RT equivalents. */
|
||||
int __libc_missing_rt_sigs;
|
||||
|
||||
/* Commented out while I figure out what the fuck goes on */
|
||||
long ____sig_table [NSIG];
|
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#if 0
|
||||
|
||||
/* The kernel will deliver signals in the old way if the signal
|
||||
number is a positive number. The kernel will deliver a signal
|
||||
with the new stack layout if the signal number is a negative number.
|
||||
|
||||
Our sigaction code takes care of selecting the type of kernel we are
|
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using at runtime. */
|
||||
|
||||
extern void ____sparc_signal_trampoline (int);
|
||||
|
||||
int
|
||||
__trampoline_sigaction (int sig, struct sigaction *new, struct sigaction *old)
|
||||
{
|
||||
int ret;
|
||||
int need_to_hide_trick = 0;
|
||||
__sighandler_t old_sh;
|
||||
|
||||
if (new)
|
||||
{
|
||||
if (new->sa_handler != SIG_DFL && new->sa_handler != SIG_IGN)
|
||||
{
|
||||
old_sh = ____sig_table[sig];
|
||||
____sig_table[sig] = (long int) new->sa_handler;
|
||||
new->sa_handler = ____sparc_signal_trampoline;
|
||||
need_to_hide_trick = 1;
|
||||
}
|
||||
}
|
||||
__asm__("or %%g0,%0,%%g1\n\t"
|
||||
"or %%g0,%1,%%o0\n\t"
|
||||
"or %%g0,%2,%%o1\n\t"
|
||||
"or %%g0,%3,%%o2\n\t"
|
||||
"t 0x10\n\t"
|
||||
"bcc 1f\n\t"
|
||||
"or %%o0, %%g0, %0\n\t"
|
||||
"sub %%g0, %%o0, %0\n\t"
|
||||
"1:"
|
||||
: "=r" (ret), "=r" ((long int) sig), "=r" ((long int) new),
|
||||
"=r" ((long int) old)
|
||||
: "0" (__NR_sigaction), "1" (sig), "2" (new), "3" (old)
|
||||
: "g1", "o0", "o1", "o2");
|
||||
|
||||
if (ret >= 0)
|
||||
{
|
||||
if (old && old->sa_handler == ____sparc_signal_trampoline)
|
||||
{
|
||||
if (need_to_hide_trick)
|
||||
old->sa_handler = old_sh;
|
||||
else
|
||||
old->sa_handler = ____sig_table[sig];
|
||||
}
|
||||
if (need_to_hide_trick)
|
||||
new->sa_handler = ____sig_table[sig];
|
||||
return 0;
|
||||
}
|
||||
__set_errno (-ret);
|
||||
return -1;
|
||||
}
|
||||
#else
|
||||
# define __new_sigaction __sigaction
|
||||
#endif
|
||||
|
||||
int
|
||||
__new_sigaction (int sig, __const struct sigaction *new, struct sigaction *old)
|
||||
__sigaction (int sig, __const struct sigaction *act, struct sigaction *oact)
|
||||
{
|
||||
int ret;
|
||||
struct kernel_sigaction k_sigact, k_osigact;
|
||||
|
||||
/* Magic to tell the kernel we are using "new-style" signals, in that
|
||||
the signal table is not kept in userspace. Not the same as the
|
||||
really-new-style rt signals. */
|
||||
sig = -sig;
|
||||
|
||||
__asm__("or %%g0,%0,%%g1\n\t"
|
||||
"or %%g0,%1,%%o0\n\t"
|
||||
"or %%g0,%2,%%o1\n\t"
|
||||
"or %%g0,%3,%%o2\n\t"
|
||||
"t 0x10\n\t"
|
||||
"bcc 1f\n\t"
|
||||
"or %%o0, %%g0, %0\n\t"
|
||||
"sub %%g0,%%o0,%0\n\t"
|
||||
"1:"
|
||||
: "=r" (ret), "=r" ((long int) sig), "=r" ((long int) new),
|
||||
"=r" ((long int) old)
|
||||
: "0" (__NR_sigaction), "1" (sig), "2" (new), "3" (old)
|
||||
: "g1", "o0", "o1", "o2");
|
||||
if (act)
|
||||
{
|
||||
k_sigact.sa_handler = act->sa_handler;
|
||||
k_sigact.sa_mask = act->sa_mask.__val[0];
|
||||
k_sigact.sa_flags = act->sa_flags;
|
||||
}
|
||||
|
||||
{
|
||||
register int r_syscallnr __asm__("%g1") = __NR_sigaction;
|
||||
register int r_sig __asm__("%o0") = sig;
|
||||
register struct kernel_sigaction *r_act __asm__("%o1");
|
||||
register struct kernel_sigaction *r_oact __asm__("%o2");
|
||||
|
||||
r_act = act ? &k_sigact : NULL;
|
||||
r_oact = oact ? &k_osigact : NULL;
|
||||
|
||||
__asm__ __volatile__("t 0x10\n\t"
|
||||
"bcc 1f\n\t"
|
||||
" nop\n\t"
|
||||
" sub %%g0,%%o0,%%o0\n"
|
||||
"1:"
|
||||
: "=r"(r_sig)
|
||||
: "r"(r_syscallnr), "r"(r_act), "r"(r_oact),
|
||||
"0"(r_sig));
|
||||
|
||||
ret = r_sig;
|
||||
}
|
||||
|
||||
if (ret >= 0)
|
||||
return 0;
|
||||
{
|
||||
if (oact)
|
||||
{
|
||||
oact->sa_handler = k_osigact.sa_handler;
|
||||
oact->sa_mask.__val[0] = k_osigact.sa_mask;
|
||||
oact->sa_flags = k_osigact.sa_flags;
|
||||
oact->sa_restorer = NULL;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
__set_errno (-ret);
|
||||
return -1;
|
||||
}
|
||||
|
||||
#if 0
|
||||
int
|
||||
__sigaction (int sig, __const struct sigaction *new, struct sigaction *old)
|
||||
{
|
||||
static (*sigact_routine) (int, __const struct sigaction *, struct sigaction *);
|
||||
int ret;
|
||||
struct sigaction sa;
|
||||
|
||||
if (sigact_routine)
|
||||
return (*sigact_routine) (sig, new, old);
|
||||
|
||||
ret = __new_sigaction (1, NULL, &sa);
|
||||
if (ret == -1)
|
||||
sigact_routine = __trampoline_sigaction;
|
||||
else
|
||||
sigact_routine = __new_sigaction;
|
||||
|
||||
return __sigaction (sig, new, old);
|
||||
}
|
||||
#endif
|
||||
|
||||
weak_alias (__sigaction, sigaction);
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
/* Copyright (C) 1997 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Miguel de Icaza <miguel@gnu.ai.mit.edu>, 1997.
|
||||
|
||||
|
|
|
|||
|
|
@ -26,13 +26,10 @@
|
|||
|
||||
.text
|
||||
.align 4
|
||||
.globl __libc_clone
|
||||
.type __libc_clone,@function
|
||||
.weak clone
|
||||
__clone = __libc_clone
|
||||
clone = __libc_clone
|
||||
.globl __clone
|
||||
.type __clone,@function
|
||||
|
||||
__libc_clone:
|
||||
__clone:
|
||||
save %sp,-160,%sp
|
||||
|
||||
/* sanity check arguments */
|
||||
|
|
@ -77,7 +74,7 @@ __libc_clone:
|
|||
mov -1,%i0
|
||||
ret
|
||||
restore
|
||||
.size __libc_clone, .-__libc_clone
|
||||
.size __clone, .-__clone
|
||||
|
||||
.type __thread_start,@function
|
||||
__thread_start:
|
||||
|
|
@ -88,3 +85,5 @@ __thread_start:
|
|||
call _exit,0
|
||||
nop
|
||||
.size __thread_start, .-__thread_start
|
||||
|
||||
weak_alias(__clone, clone)
|
||||
|
|
|
|||
Loading…
Reference in a new issue