mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
63fb881a04
Daniel Jacobowitz <dan@codesourcery.com> Richard Sandiford <rdsandiford@googlemail.com> * sysdeps/mips/dl-dtprocnum.h (DT_MIPS_NUM): Redefine. * sysdeps/mips/dl-lookup.c: New. * sysdeps/mips/do-lookup.h: New. * sysdeps/mips/dl-machine.h (ELF_MACHINE_NO_PLT): Remove definition. (STO_MIPS_PLT, R_MIPS_COPY, R_MIPS_JUMP_SLOT, DT_MIPS_PLTGOT): Define if needed. (ELF_MACHINE_JMP_SLOT): Alter definition and update comment. (elf_machine_type_class): Likewise. (ELF_MACHINE_PLT_REL): Define. (elf_machine_fixup_plt): New. (elf_machine_plt_value): New. (elf_machine_reloc): Handle jump slot and copy relocations. (elf_machine_lazy_rel): Point relocation place at PLT if required. (RESOLVE_GOTSYM): Take a relocation type argument. (elf_machine_got_rel): Bind lazy stubs directly to their target if !lazy. Skip lazy binding for PLT symbols. (elf_machine_runtime_setup): Fill in .got.plt header. * sysdeps/mips/dl-trampoline.c (IFNEWABI): New macro. (ELF_DL_PLT_FRAME_SIZE, ELF_DL_PLT_SAVE_ARG_REGS, ELF_DL_PLT_RESTORE_ARG_REGS): Define. (_dl_runtime_pltresolve): New. * sysdeps/mips/bits/linkmap.h: New file. * sysdeps/mips/tls-macros.h: Load $gp as required. Merge 32-bit and 64-bit versions. * sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (SYSCALL_ERROR_LABEL): Delete definition. * sysdeps/unix/sysv/linux/mips/nptl/sysdep-cancel.h (PSEUDO_CPLOAD, PSEUDO_ERRJMP, PSEUDO_SAVEGP, PSEUDO_LOADGP): Define. (PSEUDO): Use them. Move outside __PIC__. (PSEUDO_JMP): New. (CENABLE, CDISABLE): Use it.
190 lines
6.4 KiB
C
190 lines
6.4 KiB
C
/* Copyright (C) 2003, 2004, 2005 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 <sysdep.h>
|
|
#include <sysdeps/generic/sysdep.h>
|
|
#include <tls.h>
|
|
#ifndef __ASSEMBLER__
|
|
# include <nptl/pthreadP.h>
|
|
#endif
|
|
|
|
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
|
|
|
|
# ifdef __PIC__
|
|
# define PSEUDO_CPLOAD .cpload t9;
|
|
# define PSEUDO_ERRJMP la t9, __syscall_error; jr t9;
|
|
# define PSEUDO_SAVEGP sw gp, 32(sp); cfi_rel_offset (gp, 32);
|
|
# define PSEUDO_LOADGP lw gp, 32(sp);
|
|
# else
|
|
# define PSEUDO_CPLOAD
|
|
# define PSEUDO_ERRJMP j __syscall_error;
|
|
# define PSEUDO_SAVEGP
|
|
# define PSEUDO_LOADGP
|
|
# endif
|
|
|
|
# undef PSEUDO
|
|
# define PSEUDO(name, syscall_name, args) \
|
|
.align 2; \
|
|
L(pseudo_start): \
|
|
cfi_startproc; \
|
|
99: PSEUDO_ERRJMP \
|
|
.type __##syscall_name##_nocancel, @function; \
|
|
.globl __##syscall_name##_nocancel; \
|
|
__##syscall_name##_nocancel: \
|
|
.set noreorder; \
|
|
PSEUDO_CPLOAD \
|
|
li v0, SYS_ify(syscall_name); \
|
|
syscall; \
|
|
.set reorder; \
|
|
bne a3, zero, 99b; \
|
|
ret; \
|
|
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
|
|
ENTRY (name) \
|
|
.set noreorder; \
|
|
PSEUDO_CPLOAD \
|
|
.set reorder; \
|
|
SINGLE_THREAD_P(v1); \
|
|
bne zero, v1, L(pseudo_cancel); \
|
|
.set noreorder; \
|
|
li v0, SYS_ify(syscall_name); \
|
|
syscall; \
|
|
.set reorder; \
|
|
bne a3, zero, 99b; \
|
|
ret; \
|
|
L(pseudo_cancel): \
|
|
SAVESTK_##args; \
|
|
sw ra, 28(sp); \
|
|
cfi_rel_offset (ra, 28); \
|
|
PSEUDO_SAVEGP \
|
|
PUSHARGS_##args; /* save syscall args */ \
|
|
CENABLE; \
|
|
PSEUDO_LOADGP \
|
|
sw v0, 44(sp); /* save mask */ \
|
|
POPARGS_##args; /* restore syscall args */ \
|
|
.set noreorder; \
|
|
li v0, SYS_ify (syscall_name); \
|
|
syscall; \
|
|
.set reorder; \
|
|
sw v0, 36(sp); /* save syscall result */ \
|
|
sw a3, 40(sp); /* save syscall error flag */ \
|
|
lw a0, 44(sp); /* pass mask as arg1 */ \
|
|
CDISABLE; \
|
|
PSEUDO_LOADGP \
|
|
lw v0, 36(sp); /* restore syscall result */ \
|
|
lw a3, 40(sp); /* restore syscall error flag */ \
|
|
lw ra, 28(sp); /* restore return address */ \
|
|
.set noreorder; \
|
|
bne a3, zero, 99b; \
|
|
RESTORESTK; \
|
|
L(pseudo_end): \
|
|
.set reorder;
|
|
|
|
# undef PSEUDO_END
|
|
# define PSEUDO_END(sym) cfi_endproc; .end sym; .size sym,.-sym
|
|
|
|
# define PUSHARGS_0 /* nothing to do */
|
|
# define PUSHARGS_1 PUSHARGS_0 sw a0, 0(sp); cfi_rel_offset (a0, 0);
|
|
# define PUSHARGS_2 PUSHARGS_1 sw a1, 4(sp); cfi_rel_offset (a1, 4);
|
|
# define PUSHARGS_3 PUSHARGS_2 sw a2, 8(sp); cfi_rel_offset (a2, 8);
|
|
# define PUSHARGS_4 PUSHARGS_3 sw a3, 12(sp); cfi_rel_offset (a3, 12);
|
|
# define PUSHARGS_5 PUSHARGS_4 /* handled by SAVESTK_## */
|
|
# define PUSHARGS_6 PUSHARGS_5
|
|
# define PUSHARGS_7 PUSHARGS_6
|
|
|
|
# define POPARGS_0 /* nothing to do */
|
|
# define POPARGS_1 POPARGS_0 lw a0, 0(sp);
|
|
# define POPARGS_2 POPARGS_1 lw a1, 4(sp);
|
|
# define POPARGS_3 POPARGS_2 lw a2, 8(sp);
|
|
# define POPARGS_4 POPARGS_3 lw a3, 12(sp);
|
|
# define POPARGS_5 POPARGS_4 /* args already in new stackframe */
|
|
# define POPARGS_6 POPARGS_5
|
|
# define POPARGS_7 POPARGS_6
|
|
|
|
|
|
# define STKSPACE 48
|
|
# define SAVESTK_0 subu sp, STKSPACE; cfi_adjust_cfa_offset(STKSPACE)
|
|
# define SAVESTK_1 SAVESTK_0
|
|
# define SAVESTK_2 SAVESTK_1
|
|
# define SAVESTK_3 SAVESTK_2
|
|
# define SAVESTK_4 SAVESTK_3
|
|
# define SAVESTK_5 lw t0, 16(sp); \
|
|
SAVESTK_0; \
|
|
sw t0, 16(sp)
|
|
|
|
# define SAVESTK_6 lw t0, 16(sp); \
|
|
lw t1, 20(sp); \
|
|
SAVESTK_0; \
|
|
sw t0, 16(sp); \
|
|
sw t1, 20(sp)
|
|
|
|
# define SAVESTK_7 lw t0, 16(sp); \
|
|
lw t1, 20(sp); \
|
|
lw t2, 24(sp); \
|
|
SAVESTK_0; \
|
|
sw t0, 16(sp); \
|
|
sw t1, 20(sp); \
|
|
sw t2, 24(sp)
|
|
|
|
# define RESTORESTK addu sp, STKSPACE; cfi_adjust_cfa_offset(-STKSPACE)
|
|
|
|
|
|
# ifdef __PIC__
|
|
/* We use jalr rather than jal. This means that the assembler will not
|
|
automatically restore $gp (in case libc has multiple GOTs) so we must
|
|
do it manually - which we have to do anyway since we don't use .cprestore.
|
|
It also shuts up the assembler warning about not using .cprestore. */
|
|
# define PSEUDO_JMP(sym) la t9, sym; jalr t9;
|
|
# else
|
|
# define PSEUDO_JMP(sym) jal sym;
|
|
# endif
|
|
|
|
# ifdef IS_IN_libpthread
|
|
# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel)
|
|
# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel)
|
|
# elif defined IS_IN_librt
|
|
# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel)
|
|
# define CDISABLE PSEUDO_JMP (__librt_disable_asynccancel)
|
|
# else
|
|
# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel)
|
|
# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel)
|
|
# endif
|
|
|
|
# ifndef __ASSEMBLER__
|
|
# define SINGLE_THREAD_P \
|
|
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
|
|
header.multiple_threads) \
|
|
== 0, 1)
|
|
# else
|
|
# define SINGLE_THREAD_P(reg) \
|
|
READ_THREAD_POINTER(reg); \
|
|
lw reg, MULTIPLE_THREADS_OFFSET(reg)
|
|
#endif
|
|
|
|
#elif !defined __ASSEMBLER__
|
|
|
|
# define SINGLE_THREAD_P 1
|
|
# define NO_CANCELLATION 1
|
|
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLER__
|
|
# define RTLD_SINGLE_THREAD_P \
|
|
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
|
|
header.multiple_threads) == 0, 1)
|
|
#endif
|