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serginhofr |
/* Save and set 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 .
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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, 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
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#include
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#include "ucontext_i.h"
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/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
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LEAF (__swapcontext)
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mv t0, a1 /* t0 <- ucp */
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REG_S ra, MCONTEXT_PC(a0)
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REG_S ra, ( 1 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S sp, ( 2 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s0, ( 8 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s1, ( 9 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S x0, (10 * SZREG + MCONTEXT_GREGS)(a0) /* return 0 */
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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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REG_S s8, (24 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s9, (25 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s10,(26 * SZREG + MCONTEXT_GREGS)(a0)
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REG_S s11,(27 * SZREG + MCONTEXT_GREGS)(a0)
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#ifdef __riscv_hard_float
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frsr a1
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fsd fs0, ( 8 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs1, ( 9 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs2, (18 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs3, (19 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs4, (20 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs5, (21 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs6, (22 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs7, (23 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs8, (24 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs9, (25 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs10,(26 * 8 + MCONTEXT_FPREGS)(a0)
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fsd fs11,(27 * 8 + MCONTEXT_FPREGS)(a0)
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sw a1, MCONTEXT_FSR(a0)
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#endif /* __riscv_hard_float */
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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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add a1, a0, UCONTEXT_SIGMASK
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li a0, SIG_SETMASK
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li a7, SYS_ify (rt_sigprocmask)
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scall
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bltz a0, 99f
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#ifdef __riscv_hard_float
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lw t1, MCONTEXT_FSR(t0)
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fld fs0, ( 8 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs1, ( 9 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs2, (18 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs3, (19 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs4, (20 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs5, (21 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs6, (22 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs7, (23 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs8, (24 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs9, (25 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs10,(26 * 8 + MCONTEXT_FPREGS)(t0)
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fld fs11,(27 * 8 + MCONTEXT_FPREGS)(t0)
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fssr t1
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#endif /* __riscv_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 t1, MCONTEXT_PC(t0)
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REG_L ra, ( 1 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L sp, ( 2 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s0, ( 8 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s1, ( 9 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L a0, (10 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L a1, (11 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L a2, (12 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L a3, (13 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L a4, (14 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L a5, (15 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L a6, (16 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L a7, (17 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s8, (24 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s9, (25 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s10,(26 * SZREG + MCONTEXT_GREGS)(t0)
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REG_L s11,(27 * SZREG + MCONTEXT_GREGS)(t0)
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jr t1
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99: j __syscall_error
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PSEUDO_END (__swapcontext)
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weak_alias (__swapcontext, swapcontext)
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