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| author | Stafford Horne <shorne@gmail.com> | 2021-10-20 06:52:38 +0900 |
|---|---|---|
| committer | Stafford Horne <shorne@gmail.com> | 2022-01-05 06:40:06 +0900 |
| commit | 7d334b18312dad7dcec9544d365c066d0105c183 (patch) | |
| tree | e14a87db2736772bea8875671b0bd161b8b28cf8 /sysdeps/unix/sysv/linux/or1k/getcontext.S | |
| parent | 1871c95f2bf06e33e8e2bc8387dca6ed46cc829a (diff) | |
| download | glibc-7d334b18312dad7dcec9544d365c066d0105c183.tar.gz glibc-7d334b18312dad7dcec9544d365c066d0105c183.tar.xz glibc-7d334b18312dad7dcec9544d365c066d0105c183.zip | |
or1k: Linux ABI
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/unix/sysv/linux/or1k/getcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/or1k/getcontext.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/or1k/getcontext.S b/sysdeps/unix/sysv/linux/or1k/getcontext.S new file mode 100644 index 0000000000..2cc845c50c --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/getcontext.S @@ -0,0 +1,72 @@ +/* Save current context. OpenRISC version. + Copyright (C) 2022 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, see + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include "ucontext_i.h" + +/* int getcontext (ucontext_t *ucp) + + Returns 0 on success -1 and errno on failure. + */ + .text +ENTRY(__getcontext) + /* Store r1, the stack pointer. */ + l.sw (UCONTEXT_MCONTEXT + 1*4)(r3), r1 + /* Store r2, the frame pointer. */ + l.sw (UCONTEXT_MCONTEXT + 2*4)(r3), r2 + /* Store r9, the link register. */ + l.sw (UCONTEXT_MCONTEXT + 9*4)(r3), r9 + /* Store r9 to reg[11] too, as we need two links for makecontext. */ + l.sw (UCONTEXT_MCONTEXT + 11*4)(r3), r9 + /* Store r10, the TLS register. */ + l.sw (UCONTEXT_MCONTEXT + 10*4)(r3), r10 + /* Store r14-r30 even, callee saved registers. */ + l.sw (UCONTEXT_MCONTEXT + 14*4)(r3), r14 + l.sw (UCONTEXT_MCONTEXT + 16*4)(r3), r16 + l.sw (UCONTEXT_MCONTEXT + 18*4)(r3), r18 + l.sw (UCONTEXT_MCONTEXT + 20*4)(r3), r20 + l.sw (UCONTEXT_MCONTEXT + 22*4)(r3), r22 + l.sw (UCONTEXT_MCONTEXT + 24*4)(r3), r24 + l.sw (UCONTEXT_MCONTEXT + 26*4)(r3), r26 + l.sw (UCONTEXT_MCONTEXT + 28*4)(r3), r28 + l.sw (UCONTEXT_MCONTEXT + 30*4)(r3), r30 + + /* Get signal mask. */ + /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ + l.ori r6, r0, _NSIG8 + l.addi r5, r3, UCONTEXT_SIGMASK + l.ori r4, r0, 0 + l.ori r3, r0, SIG_BLOCK + l.ori r11, r0, SYS_ify (rt_sigprocmask) + /* Do the syscall. */ + l.sys 1 + l.nop + + /* if -4096 < ret < 0 holds, it's an error */ + l.sfgeui r11, 0xf001 + l.bf 1f + l.nop + + l.jr r9 + l.ori r11, r0, 0 + +1: l.j __syscall_error + l.ori r3, r11, 0 + +END(__getcontext) +weak_alias(__getcontext, getcontext) |