2009-04-18 Maciej W. Rozycki <macro@codesourcery.com>
* sysdeps/unix/sysv/linux/mips/getcontext.S: New file. * sysdeps/unix/sysv/linux/mips/makecontext.S: New file. * sysdeps/unix/sysv/linux/mips/setcontext.S: New file. * sysdeps/unix/sysv/linux/mips/swapcontext.S: New file. * sysdeps/unix/sysv/linux/mips/sys/ucontext.h (mcontext_t): Update comment. * sysdeps/unix/sysv/linux/mips/kernel_rt_sigframe.h: New file. * sysdeps/unix/sysv/linux/mips/ucontext_i.sym: New file. * sysdeps/unix/sysv/linux/mips/Makefile (gen-as-const-headers): Add ucontext_i.sym.
This commit is contained in:
Joseph Myers
parent
19d6bdd79a
commit
ff3475331e
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@ -1,3 +1,16 @@
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2009-04-18 Maciej W. Rozycki <macro@codesourcery.com>
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* sysdeps/unix/sysv/linux/mips/getcontext.S: New file.
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* sysdeps/unix/sysv/linux/mips/makecontext.S: New file.
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* sysdeps/unix/sysv/linux/mips/setcontext.S: New file.
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* sysdeps/unix/sysv/linux/mips/swapcontext.S: New file.
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* sysdeps/unix/sysv/linux/mips/sys/ucontext.h (mcontext_t):
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Update comment.
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* sysdeps/unix/sysv/linux/mips/kernel_rt_sigframe.h: New file.
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* sysdeps/unix/sysv/linux/mips/ucontext_i.sym: New file.
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* sysdeps/unix/sysv/linux/mips/Makefile (gen-as-const-headers):
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Add ucontext_i.sym.
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2009-04-18 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/unix/sysv/linux/mips/kernel-features.h (__ASSUME_PREADV,
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@ -135,3 +135,7 @@ sysdep_routines += dl-static
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sysdep-rtld-routines += dl-static
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endif
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endif
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ifeq ($(subdir),stdlib)
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gen-as-const-headers += ucontext_i.sym
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endif
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@ -0,0 +1,149 @@
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/* Save current context.
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Copyright (C) 2009 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
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The GNU C Library is free software; you can redistribute it and/or
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||||
modify it under the terms of the GNU Lesser General Public
|
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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||||
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include <sysdep.h>
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#include <sys/asm.h>
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#include <sys/fpregdef.h>
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#include <sys/regdef.h>
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#include "ucontext_i.h"
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/* int getcontext (ucontext_t *ucp) */
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.text
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LOCALSZ = 0
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MASK = 0x00000000
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#ifdef __PIC__
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LOCALSZ = 1 /* save gp */
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# if _MIPS_SIM != _ABIO32
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MASK = 0x10000000
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# endif
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#endif
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FRAMESZ = ((LOCALSZ * SZREG) + ALSZ) & ALMASK
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GPOFF = FRAMESZ - (1 * SZREG)
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NESTED (__getcontext, FRAMESZ, ra)
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.mask MASK, 0
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.fmask 0x00000000, 0
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#ifdef __PIC__
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SETUP_GP
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move a2, sp
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# define _SP a2
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# if _MIPS_SIM != _ABIO32
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move a3, gp
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# define _GP a3
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# endif
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PTR_ADDIU sp, -FRAMESZ
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SETUP_GP64 (GPOFF, __getcontext)
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SAVE_GP (GPOFF)
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#else /* ! __PIC__ */
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# define _SP sp
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# define _GP gp
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#endif /* ! __PIC__ */
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#ifdef PROF
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.set noat
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move AT, ra
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jal _mcount
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.set at
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#endif
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/* Store a magic flag. */
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li v1, 1
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REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
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REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0)
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#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
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REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0)
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#endif
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REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S ra, MCONTEXT_PC(a0)
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#ifdef __mips_hard_float
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# if _MIPS_SIM == _ABI64
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s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0)
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# else /* _MIPS_SIM != _ABI64 */
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s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
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s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0)
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# endif /* _MIPS_SIM != _ABI64 */
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cfc1 v1, fcr31
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sw v1, MCONTEXT_FPC_CSR(a0)
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#endif /* __mips_hard_float */
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/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
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li a3, _NSIG8
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PTR_ADDU a2, a0, UCONTEXT_SIGMASK
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move a1, zero
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li a0, SIG_BLOCK
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li v0, SYS_ify (rt_sigprocmask)
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syscall
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bnez a3, 99f
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#ifdef __PIC__
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RESTORE_GP64
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PTR_ADDIU sp, FRAMESZ
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#endif
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move v0, zero
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jr ra
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99:
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#ifdef __PIC__
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PTR_LA t9, JUMPTARGET (__syscall_error)
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RESTORE_GP64
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PTR_ADDIU sp, FRAMESZ
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jr t9
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#else /* ! __PIC__ */
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j JUMPTARGET (__syscall_error)
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#endif /* ! __PIC__ */
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PSEUDO_END (__getcontext)
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weak_alias (__getcontext, getcontext)
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@ -0,0 +1,10 @@
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/* Linux kernel RT signal frame. */
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typedef struct kernel_rt_sigframe
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{
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uint32_t rs_ass[4];
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uint32_t rs_code[2];
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struct siginfo rs_info;
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struct ucontext rs_uc;
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uint32_t rs_altcode[8] __attribute__ ((__aligned__ (1 << 7)));
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}
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kernel_rt_sigframe_t;
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@ -0,0 +1,189 @@
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/* Modify saved context.
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Copyright (C) 2009 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
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The GNU C Library is free software; you can redistribute it and/or
|
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modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
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version 2.1 of the License, or (at your option) any later version.
|
||||
|
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The GNU C Library is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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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, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include <sysdep.h>
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#include <sys/asm.h>
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#include <sys/fpregdef.h>
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#include <sys/regdef.h>
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#include "ucontext_i.h"
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/* int makecontext (ucontext_t *ucp, (void *func) (), int argc, ...) */
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.text
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LOCALSZ = 0
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ARGSZ = 0
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MASK = 0x00000000
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#ifdef __PIC__
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LOCALSZ = 1 /* save gp */
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#endif
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#if _MIPS_SIM != _ABIO32
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ARGSZ = 5 /* save a3-a7 */
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# ifdef __PIC__
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MASK = 0x10000000
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# endif
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#endif
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FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK
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GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG)
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#if _MIPS_SIM != _ABIO32
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A3OFF = FRAMESZ - (5 * SZREG) /* callee-allocated */
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A4OFF = FRAMESZ - (4 * SZREG)
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A5OFF = FRAMESZ - (3 * SZREG)
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A6OFF = FRAMESZ - (2 * SZREG)
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A7OFF = FRAMESZ - (1 * SZREG)
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NARGREGS = 8
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#else
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A3OFF = FRAMESZ + (3 * SZREG) /* caller-allocated */
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NARGREGS = 4
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#endif
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NESTED (__makecontext, FRAMESZ, ra)
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.mask MASK, -(ARGSZ * SZREG)
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.fmask 0x00000000, 0
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98:
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#ifdef __PIC__
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SETUP_GP
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#endif
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PTR_ADDIU sp, -FRAMESZ
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#ifdef __PIC__
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SETUP_GP64 (GPOFF, __makecontext)
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SAVE_GP (GPOFF)
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#endif
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#ifdef PROF
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.set noat
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move AT, ra
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jal _mcount
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.set at
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#endif
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/* Store args to be passed. */
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REG_S a3, A3OFF(sp)
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#if _MIPS_SIM != _ABIO32
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REG_S a4, A4OFF(sp)
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REG_S a5, A5OFF(sp)
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REG_S a6, A6OFF(sp)
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REG_S a7, A7OFF(sp)
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#endif
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/* Store a magic flag. */
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li v1, 1
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REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
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/* Set up the stack. */
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PTR_L t0, STACK_SP(a0)
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PTR_L t2, STACK_SIZE(a0)
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||||
PTR_ADDIU t1, sp, A3OFF
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||||
PTR_ADDU t0, t2
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||||
and t0, ALMASK
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||||
blez a2, 2f /* no arguments */
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|
||||
/* Store register arguments. */
|
||||
PTR_ADDIU t2, a0, MCONTEXT_GREGS + 4 * SZREG
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||||
move t3, zero
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||||
0:
|
||||
addiu t3, 1
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||||
REG_L v1, (t1)
|
||||
PTR_ADDIU t1, SZREG
|
||||
REG_S v1, (t2)
|
||||
PTR_ADDIU t2, SZREG
|
||||
bgeu t3, a2, 2f /* all done */
|
||||
bltu t3, NARGREGS, 0b /* next */
|
||||
|
||||
/* Make room for stack arguments. */
|
||||
PTR_SUBU t2, a2, t3
|
||||
PTR_SLL t2, 3
|
||||
PTR_SUBU t0, t2
|
||||
and t0, ALMASK
|
||||
|
||||
/* Store stack arguments. */
|
||||
move t2, t0
|
||||
1:
|
||||
addiu t3, 1
|
||||
REG_L v1, (t1)
|
||||
PTR_ADDIU t1, SZREG
|
||||
REG_S v1, (t2)
|
||||
PTR_ADDIU t2, SZREG
|
||||
bltu t3, a2, 1b /* next */
|
||||
|
||||
2:
|
||||
#if _MIPS_SIM == _ABIO32
|
||||
/* Make room for a0-a3 storage. */
|
||||
PTR_ADDIU t0, -(NARGSAVE * SZREG)
|
||||
#endif
|
||||
PTR_L v1, UCONTEXT_LINK(a0)
|
||||
#ifdef __PIC__
|
||||
PTR_ADDIU t9, 99f - 98b
|
||||
#else
|
||||
PTR_LA t9, 99f
|
||||
#endif
|
||||
REG_S t0, (29 * SZREG + MCONTEXT_GREGS)(a0) /* sp */
|
||||
REG_S v1, (16 * SZREG + MCONTEXT_GREGS)(a0) /* s0 */
|
||||
#ifdef __PIC__
|
||||
REG_S gp, (17 * SZREG + MCONTEXT_GREGS)(a0) /* s1 */
|
||||
#endif
|
||||
REG_S t9, (31 * SZREG + MCONTEXT_GREGS)(a0) /* ra */
|
||||
REG_S a1, MCONTEXT_PC(a0)
|
||||
|
||||
#ifdef __PIC__
|
||||
RESTORE_GP64
|
||||
PTR_ADDIU sp, FRAMESZ
|
||||
#endif
|
||||
jr ra
|
||||
|
||||
99:
|
||||
#ifdef __PIC__
|
||||
move gp, s1
|
||||
#endif
|
||||
move a0, zero
|
||||
beqz s0, 0f
|
||||
|
||||
/* setcontext (ucp) */
|
||||
move a0, s0
|
||||
#ifdef __PIC__
|
||||
PTR_LA t9, JUMPTARGET (__setcontext)
|
||||
jalr t9
|
||||
# if _MIPS_SIM == _ABIO32
|
||||
move gp, s1
|
||||
# endif
|
||||
#else
|
||||
jal JUMPTARGET (__setcontext)
|
||||
#endif
|
||||
move a0, v0
|
||||
|
||||
0:
|
||||
/* exit (a0) */
|
||||
#ifdef __PIC__
|
||||
PTR_LA t9, HIDDEN_JUMPTARGET (exit)
|
||||
jalr t9
|
||||
#else
|
||||
jal HIDDEN_JUMPTARGET (exit)
|
||||
#endif
|
||||
|
||||
/* You don't exist, you won't feel anything. */
|
||||
1:
|
||||
lb zero, (zero)
|
||||
b 1b
|
||||
PSEUDO_END (__makecontext)
|
||||
|
||||
weak_alias (__makecontext, makecontext)
|
||||
|
|
@ -0,0 +1,192 @@
|
|||
/* Set current context.
|
||||
Copyright (C) 2009 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
|
||||
|
||||
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, 51 Franklin Street - Fifth Floor, Boston, MA
|
||||
02110-1301, USA. */
|
||||
|
||||
#include <sysdep.h>
|
||||
#include <sys/asm.h>
|
||||
#include <sys/fpregdef.h>
|
||||
#include <sys/regdef.h>
|
||||
|
||||
#include "ucontext_i.h"
|
||||
|
||||
/* int setcontext (const ucontext_t *ucp) */
|
||||
|
||||
.text
|
||||
LOCALSZ = 0
|
||||
ARGSZ = 0
|
||||
MASK = 0x00000000
|
||||
#ifdef __PIC__
|
||||
LOCALSZ = 1 /* save gp */
|
||||
#endif
|
||||
#if _MIPS_SIM != _ABIO32
|
||||
ARGSZ = 1 /* save a0 */
|
||||
# ifdef __PIC__
|
||||
MASK = 0x10000000
|
||||
# endif
|
||||
#endif
|
||||
FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK
|
||||
GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG)
|
||||
#if _MIPS_SIM != _ABIO32
|
||||
A0OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */
|
||||
#else
|
||||
A0OFF = FRAMESZ + (0 * SZREG) /* caller-allocated */
|
||||
#endif
|
||||
|
||||
NESTED (__setcontext, FRAMESZ, ra)
|
||||
.mask MASK, -(ARGSZ * SZREG)
|
||||
.fmask 0x00000000, 0
|
||||
|
||||
#ifdef __PIC__
|
||||
SETUP_GP
|
||||
#endif
|
||||
|
||||
PTR_ADDIU sp, -FRAMESZ
|
||||
|
||||
#ifdef __PIC__
|
||||
SETUP_GP64 (GPOFF, __setcontext)
|
||||
SAVE_GP (GPOFF)
|
||||
#endif
|
||||
|
||||
#ifdef PROF
|
||||
.set noat
|
||||
move AT, ra
|
||||
jal _mcount
|
||||
.set at
|
||||
#endif
|
||||
|
||||
/* Check for the magic flag. */
|
||||
li v0, 1
|
||||
REG_L v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
|
||||
bne v0, v1, 98f
|
||||
|
||||
REG_S a0, A0OFF(sp)
|
||||
|
||||
/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */
|
||||
li a3, _NSIG8
|
||||
move a2, zero
|
||||
PTR_ADDU a1, a0, UCONTEXT_SIGMASK
|
||||
li a0, SIG_SETMASK
|
||||
|
||||
li v0, SYS_ify (rt_sigprocmask)
|
||||
syscall
|
||||
bnez a3, 99f
|
||||
|
||||
REG_L v0, A0OFF(sp)
|
||||
|
||||
#ifdef __mips_hard_float
|
||||
# if _MIPS_SIM == _ABI64
|
||||
l.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
|
||||
# else /* _MIPS_SIM != _ABI64 */
|
||||
l.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
|
||||
# endif /* _MIPS_SIM != _ABI64 */
|
||||
|
||||
lw v1, MCONTEXT_FPC_CSR(v0)
|
||||
ctc1 v1, fcr31
|
||||
#endif /* __mips_hard_float */
|
||||
|
||||
/* Note the contents of argument registers will be random
|
||||
unless makecontext() has been called. */
|
||||
REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
#if _MIPS_SIM != _ABIO32
|
||||
REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
#endif
|
||||
|
||||
REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
|
||||
REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
#endif
|
||||
REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L t9, MCONTEXT_PC(v0)
|
||||
|
||||
move v0, zero
|
||||
jr t9
|
||||
|
||||
98:
|
||||
/* This is a context obtained from a signal handler.
|
||||
Perform a full restore by pushing the context
|
||||
passed onto a simulated signal frame on the stack
|
||||
and call the signal return syscall as if a signal
|
||||
handler exited normally. */
|
||||
PTR_ADDIU sp, -((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
|
||||
|
||||
/* Only ucontext is referred to from rt_sigreturn,
|
||||
copy it. */
|
||||
PTR_ADDIU t1, sp, RT_SIGFRAME_UCONTEXT
|
||||
li t3, ((UCONTEXT_SIZE + SZREG - 1) / SZREG) - 1
|
||||
0:
|
||||
REG_L t2, (a0)
|
||||
PTR_ADDIU a0, SZREG
|
||||
REG_S t2, (t1)
|
||||
PTR_ADDIU t1, SZREG
|
||||
.set noreorder
|
||||
bgtz t3, 0b
|
||||
addiu t3, -1
|
||||
.set reorder
|
||||
|
||||
/* rt_sigreturn () -- no arguments, sp points to struct rt_sigframe. */
|
||||
li v0, SYS_ify (rt_sigreturn)
|
||||
syscall
|
||||
|
||||
/* Restore the stack and fall through to the error
|
||||
path. Successful rt_sigreturn never returns to
|
||||
its calling place. */
|
||||
PTR_ADDIU sp, ((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
|
||||
99:
|
||||
#ifdef __PIC__
|
||||
PTR_LA t9, JUMPTARGET (__syscall_error)
|
||||
RESTORE_GP64
|
||||
PTR_ADDIU sp, FRAMESZ
|
||||
jr t9
|
||||
|
||||
#else /* ! __PIC__ */
|
||||
|
||||
j JUMPTARGET (__syscall_error)
|
||||
#endif /* ! __PIC__ */
|
||||
PSEUDO_END (__setcontext)
|
||||
|
||||
weak_alias (__setcontext, setcontext)
|
||||
|
|
@ -0,0 +1,212 @@
|
|||
/* Save and set current context.
|
||||
Copyright (C) 2009 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
|
||||
|
||||
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, 51 Franklin Street - Fifth Floor, Boston, MA
|
||||
02110-1301, USA. */
|
||||
|
||||
#include <sysdep.h>
|
||||
#include <sys/asm.h>
|
||||
#include <sys/fpregdef.h>
|
||||
#include <sys/regdef.h>
|
||||
|
||||
#include "ucontext_i.h"
|
||||
|
||||
/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
|
||||
|
||||
.text
|
||||
LOCALSZ = 0
|
||||
ARGSZ = 0
|
||||
MASK = 0x00000000
|
||||
#ifdef __PIC__
|
||||
LOCALSZ = 1 /* save gp */
|
||||
#endif
|
||||
#if _MIPS_SIM != _ABIO32
|
||||
ARGSZ = 1 /* save a1 */
|
||||
# ifdef __PIC__
|
||||
MASK = 0x10000000
|
||||
# endif
|
||||
#endif
|
||||
FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK
|
||||
GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG)
|
||||
#if _MIPS_SIM != _ABIO32
|
||||
A1OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */
|
||||
#else
|
||||
A1OFF = FRAMESZ + (1 * SZREG) /* caller-allocated */
|
||||
#endif
|
||||
|
||||
NESTED (__swapcontext, FRAMESZ, ra)
|
||||
.mask MASK, -(ARGSZ * SZREG)
|
||||
.fmask 0x00000000, 0
|
||||
|
||||
#ifdef __PIC__
|
||||
SETUP_GP
|
||||
|
||||
move a2, sp
|
||||
# define _SP a2
|
||||
|
||||
# if _MIPS_SIM != _ABIO32
|
||||
move a3, gp
|
||||
# define _GP a3
|
||||
# endif
|
||||
|
||||
PTR_ADDIU sp, -FRAMESZ
|
||||
SETUP_GP64 (GPOFF, __swapcontext)
|
||||
SAVE_GP (GPOFF)
|
||||
|
||||
#else /* ! __PIC__ */
|
||||
# define _SP sp
|
||||
# define _GP gp
|
||||
|
||||
#endif /* ! __PIC__ */
|
||||
|
||||
#ifdef PROF
|
||||
.set noat
|
||||
move AT, ra
|
||||
jal _mcount
|
||||
.set at
|
||||
#endif
|
||||
|
||||
/* Store a magic flag. */
|
||||
li v1, 1
|
||||
REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
|
||||
|
||||
REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
|
||||
REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
#endif
|
||||
REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0)
|
||||
REG_S ra, MCONTEXT_PC(a0)
|
||||
|
||||
#ifdef __mips_hard_float
|
||||
# if _MIPS_SIM == _ABI64
|
||||
s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
|
||||
# else /* _MIPS_SIM != _ABI64 */
|
||||
s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0)
|
||||
|
||||
# endif /* _MIPS_SIM != _ABI64 */
|
||||
|
||||
cfc1 v1, fcr31
|
||||
sw v1, MCONTEXT_FPC_CSR(a0)
|
||||
#endif /* __mips_hard_float */
|
||||
|
||||
REG_S a1, A1OFF(sp)
|
||||
|
||||
/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */
|
||||
li a3, _NSIG8
|
||||
PTR_ADDU a2, a0, UCONTEXT_SIGMASK
|
||||
PTR_ADDU a1, a1, UCONTEXT_SIGMASK
|
||||
li a0, SIG_SETMASK
|
||||
|
||||
li v0, SYS_ify (rt_sigprocmask)
|
||||
syscall
|
||||
bnez a3, 99f
|
||||
|
||||
REG_L v0, A1OFF(sp)
|
||||
|
||||
#ifdef __mips_hard_float
|
||||
# if _MIPS_SIM == _ABI64
|
||||
l.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
|
||||
# else /* _MIPS_SIM != _ABI64 */
|
||||
l.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
l.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0)
|
||||
|
||||
# endif /* _MIPS_SIM != _ABI64 */
|
||||
|
||||
lw v1, MCONTEXT_FPC_CSR(v0)
|
||||
ctc1 v1, fcr31
|
||||
#endif /* __mips_hard_float */
|
||||
|
||||
/* Note the contents of argument registers will be random
|
||||
unless makecontext() has been called. */
|
||||
REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
#if _MIPS_SIM != _ABIO32
|
||||
REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
#endif
|
||||
|
||||
REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
|
||||
REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
#endif
|
||||
REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0)
|
||||
REG_L t9, MCONTEXT_PC(v0)
|
||||
|
||||
move v0, zero
|
||||
jr t9
|
||||
|
||||
99:
|
||||
#ifdef __PIC__
|
||||
PTR_LA t9, JUMPTARGET (__syscall_error)
|
||||
RESTORE_GP64
|
||||
PTR_ADDIU sp, FRAMESZ
|
||||
jr t9
|
||||
|
||||
#else /* ! __PIC__ */
|
||||
|
||||
j JUMPTARGET (__syscall_error)
|
||||
#endif /* ! __PIC__ */
|
||||
PSEUDO_END (__swapcontext)
|
||||
|
||||
weak_alias (__swapcontext, swapcontext)
|
||||
|
|
@ -1,4 +1,4 @@
|
|||
/* Copyright (C) 1997, 1998, 2000, 2003, 2004, 2006 Free Software
|
||||
/* Copyright (C) 1997, 1998, 2000, 2003, 2004, 2006, 2009 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
|
||||
|
|
@ -56,12 +56,9 @@ typedef struct fpregset {
|
|||
#if _MIPS_SIM == _ABIO32
|
||||
/* Earlier versions of glibc for mips had an entirely different
|
||||
definition of mcontext_t, that didn't even resemble the
|
||||
corresponding kernel data structure. Since all legitimate uses of
|
||||
ucontext_t in glibc mustn't have accessed anything beyond
|
||||
uc_mcontext and, even then, taking a pointer to it, casting it to
|
||||
sigcontext_t, and accessing it as such, which is what it has always
|
||||
been, this can still be rectified. Fortunately, makecontext,
|
||||
[gs]etcontext et all have never been implemented. */
|
||||
corresponding kernel data structure. Fortunately, makecontext,
|
||||
[gs]etcontext et all were not implemented back then, so this can
|
||||
still be rectified. */
|
||||
typedef struct
|
||||
{
|
||||
unsigned int regmask;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,52 @@
|
|||
#include <inttypes.h>
|
||||
#include <signal.h>
|
||||
#include <stddef.h>
|
||||
#include <sys/ucontext.h>
|
||||
|
||||
#include <kernel_rt_sigframe.h>
|
||||
|
||||
-- Constants used by the rt_sigprocmask call.
|
||||
|
||||
SIG_BLOCK
|
||||
SIG_SETMASK
|
||||
|
||||
_NSIG8 (_NSIG / 8)
|
||||
|
||||
-- Offsets of the fields in the kernel rt_sigframe_t structure.
|
||||
#define rt_sigframe(member) offsetof (kernel_rt_sigframe_t, member)
|
||||
|
||||
RT_SIGFRAME_UCONTEXT rt_sigframe (rs_uc)
|
||||
|
||||
RT_SIGFRAME_SIZE sizeof (kernel_rt_sigframe_t)
|
||||
|
||||
-- Offsets of the fields in the ucontext_t structure.
|
||||
#define ucontext(member) offsetof (ucontext_t, member)
|
||||
#define stack(member) ucontext (uc_stack.member)
|
||||
#define mcontext(member) ucontext (uc_mcontext.member)
|
||||
|
||||
UCONTEXT_FLAGS ucontext (uc_flags)
|
||||
UCONTEXT_LINK ucontext (uc_link)
|
||||
UCONTEXT_STACK ucontext (uc_stack)
|
||||
UCONTEXT_MCONTEXT ucontext (uc_mcontext)
|
||||
UCONTEXT_SIGMASK ucontext (uc_sigmask)
|
||||
|
||||
STACK_SP stack (ss_sp)
|
||||
STACK_SIZE stack (ss_size)
|
||||
STACK_FLAGS stack (ss_flags)
|
||||
|
||||
MCONTEXT_GREGS mcontext (gregs)
|
||||
MCONTEXT_FPREGS mcontext (fpregs)
|
||||
MCONTEXT_MDHI mcontext (mdhi)
|
||||
MCONTEXT_HI1 mcontext (hi1)
|
||||
MCONTEXT_HI2 mcontext (hi2)
|
||||
MCONTEXT_HI3 mcontext (hi3)
|
||||
MCONTEXT_MDLO mcontext (mdlo)
|
||||
MCONTEXT_LO1 mcontext (lo1)
|
||||
MCONTEXT_LO2 mcontext (lo2)
|
||||
MCONTEXT_LO3 mcontext (lo3)
|
||||
MCONTEXT_PC mcontext (pc)
|
||||
MCONTEXT_FPC_CSR mcontext (fpc_csr)
|
||||
MCONTEXT_USED_MATH mcontext (used_math)
|
||||
MCONTEXT_DSP mcontext (dsp)
|
||||
|
||||
UCONTEXT_SIZE sizeof (ucontext_t)
|
||||
Loading…
Reference in New Issue