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2ad7600be7
I've moved the MIPS port from ports to the main sysdeps hierarchy. Beyond the README update, the move of the files was simply git mv ports/sysdeps/mips sysdeps/mips git mv ports/sysdeps/unix/mips sysdeps/unix/mips git mv ports/sysdeps/unix/sysv/linux/mips sysdeps/unix/sysv/linux/mips and in addition to the ChangeLog entries here, I put a note at the top of ports/ChangeLog.mips similar to those in other files. Tested that disassembly of installed shared libraries for mips is the same before and after this patch (except for ld.so where paths in assertions are involved, as for arm). * sysdeps/mips: Move directory from ports/sysdeps/mips. * sysdeps/unix/mips: Move directory from ports/sysdeps/unix/mips. * sysdeps/unix/sysv/linux/mips: Move directory from ports/sysdeps/unix/sysv/linux/mips. * README: Update listing for mips-*-linux-gnu and mips64-*-linux-gnu. * sysdeps/mips: Move directory to ../sysdeps/mips. * sysdeps/unix/mips: Move directory to ../sysdeps/unix/mips. * sysdeps/unix/sysv/linux/mips: Move directory to ../sysdeps/unix/sysv/linux/mips.
197 lines
5.3 KiB
ArmAsm
197 lines
5.3 KiB
ArmAsm
/* Set current context.
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Copyright (C) 2009-2014 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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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, see
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<http://www.gnu.org/licenses/>. */
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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 setcontext (const ucontext_t *ucp) */
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.text
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.set nomips16
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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 = 1 /* save a0 */
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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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A0OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */
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#else
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A0OFF = FRAMESZ + (0 * SZREG) /* caller-allocated */
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#endif
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NESTED (__setcontext, FRAMESZ, ra)
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.mask MASK, -(ARGSZ * SZREG)
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.fmask 0x00000000, 0
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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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cfi_adjust_cfa_offset (FRAMESZ)
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#ifdef __PIC__
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SETUP_GP64_STACK (GPOFF, __setcontext)
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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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/* Check for the magic flag. */
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li v0, 1
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REG_L v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
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bne v0, v1, 98f
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REG_S a0, A0OFF(sp)
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/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */
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li a3, _NSIG8
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move a2, zero
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PTR_ADDU a1, a0, UCONTEXT_SIGMASK
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li a0, SIG_SETMASK
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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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REG_L v0, A0OFF(sp)
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#ifdef __mips_hard_float
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# if _MIPS_SIM == _ABI64
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l.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0)
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# else /* _MIPS_SIM != _ABI64 */
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l.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
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l.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0)
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# endif /* _MIPS_SIM != _ABI64 */
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lw v1, MCONTEXT_FPC_CSR(v0)
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ctc1 v1, fcr31
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#endif /* __mips_hard_float */
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/* Note the contents of argument registers will be random
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unless makecontext() has been called. */
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REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0)
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#if _MIPS_SIM != _ABIO32
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REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0)
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#endif
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REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0)
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#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
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REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0)
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#endif
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REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0)
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REG_L t9, MCONTEXT_PC(v0)
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move v0, zero
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jr t9
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98:
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/* This is a context obtained from a signal handler.
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Perform a full restore by pushing the context
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passed onto a simulated signal frame on the stack
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and call the signal return syscall as if a signal
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handler exited normally. */
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PTR_ADDIU sp, -((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
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cfi_adjust_cfa_offset ((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
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/* Only ucontext is referred to from rt_sigreturn,
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copy it. */
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PTR_ADDIU t1, sp, RT_SIGFRAME_UCONTEXT
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li t3, ((UCONTEXT_SIZE + SZREG - 1) / SZREG) - 1
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0:
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REG_L t2, (a0)
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PTR_ADDIU a0, SZREG
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REG_S t2, (t1)
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PTR_ADDIU t1, SZREG
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.set noreorder
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bgtz t3, 0b
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addiu t3, -1
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.set reorder
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/* rt_sigreturn () -- no arguments, sp points to struct rt_sigframe. */
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li v0, SYS_ify (rt_sigreturn)
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syscall
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/* Restore the stack and fall through to the error
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path. Successful rt_sigreturn never returns to
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its calling place. */
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PTR_ADDIU sp, ((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
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cfi_adjust_cfa_offset (-((RT_SIGFRAME_SIZE + ALSZ) & ALMASK))
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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_STACK
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PTR_ADDIU sp, FRAMESZ
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cfi_adjust_cfa_offset (-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 (__setcontext)
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weak_alias (__setcontext, setcontext)
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