From: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
To: caiyinyu <caiyinyu@loongson.cn>,
libc-alpha@sourceware.org, joseph_myers@mentor.com,
carlos@redhat.com, i.swmail@xen0n.name
Subject: Re: [PATCH v7 08/13] LoongArch: Linux ABI
Date: Wed, 20 Jul 2022 13:37:37 -0300 [thread overview]
Message-ID: <382750c3-8329-19f3-962d-7f66ac325eb8@linaro.org> (raw)
In-Reply-To: <20220719012056.1461897-9-caiyinyu@loongson.cn>
LGTM, thanks.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
On 18/07/22 22:20, caiyinyu wrote:
> ---
> sysdeps/loongarch/dl-irel.h | 54 ++++++++++
> sysdeps/loongarch/nptl/pthreaddef.h | 32 ++++++
> sysdeps/loongarch/sys/ifunc.h | 30 ++++++
> .../unix/sysv/linux/loongarch/bits/fcntl.h | 61 +++++++++++
> .../unix/sysv/linux/loongarch/bits/procfs.h | 52 +++++++++
> .../linux/loongarch/bits/pthread_stack_min.h | 20 ++++
> .../unix/sysv/linux/loongarch/bits/sigstack.h | 32 ++++++
> .../unix/sysv/linux/loongarch/getcontext.S | 59 +++++++++++
> .../unix/sysv/linux/loongarch/localplt.data | 12 +++
> .../unix/sysv/linux/loongarch/makecontext.c | 81 ++++++++++++++
> .../unix/sysv/linux/loongarch/setcontext.S | 100 ++++++++++++++++++
> .../sysv/linux/loongarch/sigcontextinfo.h | 32 ++++++
> .../unix/sysv/linux/loongarch/swapcontext.S | 95 +++++++++++++++++
> .../unix/sysv/linux/loongarch/sys/ucontext.h | 61 +++++++++++
> sysdeps/unix/sysv/linux/loongarch/sys/user.h | 42 ++++++++
> .../sysv/linux/loongarch/ucontext-macros.h | 32 ++++++
> .../unix/sysv/linux/loongarch/ucontext_i.sym | 31 ++++++
> 17 files changed, 826 insertions(+)
> create mode 100644 sysdeps/loongarch/dl-irel.h
> create mode 100644 sysdeps/loongarch/nptl/pthreaddef.h
> create mode 100644 sysdeps/loongarch/sys/ifunc.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/bits/fcntl.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/bits/procfs.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/bits/pthread_stack_min.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/bits/sigstack.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/getcontext.S
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/localplt.data
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/makecontext.c
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/setcontext.S
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/sigcontextinfo.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/swapcontext.S
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/sys/ucontext.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/sys/user.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/ucontext-macros.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/ucontext_i.sym
>
> diff --git a/sysdeps/loongarch/dl-irel.h b/sysdeps/loongarch/dl-irel.h
> new file mode 100644
> index 0000000000..4440453f06
> --- /dev/null
> +++ b/sysdeps/loongarch/dl-irel.h
> @@ -0,0 +1,54 @@
> +/* Machine-dependent ELF indirect relocation inline functions.
> + 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/>. */
> +
> +#ifndef _DL_IREL_H
> +#define _DL_IREL_H
> +
> +#include <stdio.h>
> +#include <unistd.h>
> +#include <sys/ifunc.h>
> +
> +#define ELF_MACHINE_IRELA 1
> +
> +static inline ElfW (Addr) __attribute ((always_inline))
> +elf_ifunc_invoke (ElfW (Addr) addr)
> +{
> + __ifunc_arg_t arg =
> + {
> + ._size = sizeof (__ifunc_arg_t),
> + ._hwcap = GLRO(dl_hwcap),
> + };
> + return ((ElfW(Addr) (*) (const __ifunc_arg_t *)) (addr)) (&arg);
> +}
> +
> +static inline void __attribute ((always_inline))
> +elf_irela (const ElfW (Rela) *reloc)
> +{
> + ElfW (Addr) *const reloc_addr = (void *) reloc->r_offset;
> + const unsigned long int r_type = ELFW (R_TYPE) (reloc->r_info);
> +
> + if (__glibc_likely (r_type == R_LARCH_IRELATIVE))
> + {
> + ElfW (Addr) value = elf_ifunc_invoke (reloc->r_addend);
> + *reloc_addr = value;
> + }
> + else
> + __libc_fatal ("Unexpected reloc type in static binary.\n");
> +}
> +
> +#endif /* dl-irel.h */
Ok.
> diff --git a/sysdeps/loongarch/nptl/pthreaddef.h b/sysdeps/loongarch/nptl/pthreaddef.h
> new file mode 100644
> index 0000000000..955566cddc
> --- /dev/null
> +++ b/sysdeps/loongarch/nptl/pthreaddef.h
> @@ -0,0 +1,32 @@
> +/* pthread machine parameter definitions.
> + 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/>. */
> +
> +/* Default stack size. */
> +#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
> +
> +/* Minimum guard size. */
> +#define ARCH_MIN_GUARD_SIZE 0
> +
> +/* Required stack pointer alignment at beginning. */
> +#define STACK_ALIGN 16
> +
> +/* Minimal stack size after allocating thread descriptor and guard size. */
> +#define MINIMAL_REST_STACK 2048
> +
> +/* Location of current stack frame. */
> +#define CURRENT_STACK_FRAME __builtin_frame_address (0)
Ok.
> diff --git a/sysdeps/loongarch/sys/ifunc.h b/sysdeps/loongarch/sys/ifunc.h
> new file mode 100644
> index 0000000000..461df20c96
> --- /dev/null
> +++ b/sysdeps/loongarch/sys/ifunc.h
> @@ -0,0 +1,30 @@
> +/* Definitions used by LoongArch indirect function resolvers.
> + 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/>. */
> +
> +#ifndef _SYS_IFUNC_H
> +#define _SYS_IFUNC_H
> +
> +struct __ifunc_arg_t
> +{
> + unsigned long _size; /* Size of the struct, so it can grow. */
> + unsigned long _hwcap;
> +};
> +
> +typedef struct __ifunc_arg_t __ifunc_arg_t;
> +
> +#endif
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/bits/fcntl.h b/sysdeps/unix/sysv/linux/loongarch/bits/fcntl.h
> new file mode 100644
> index 0000000000..bf1e254234
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/bits/fcntl.h
> @@ -0,0 +1,61 @@
> +/* O_*, F_*, FD_* bit values for the generic Linux/LoongArch ABI.
> + 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/>. */
> +
> +#ifndef _FCNTL_H
> +#error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
> +#endif
> +
> +#include <bits/wordsize.h>
> +
> +/* In 64-bit ISA files are always with 64bit off_t and F_*LK64 are the same as
> + non-64-bit versions. It will need to be revised for 128-bit. */
> +#if __WORDSIZE == 64
> +#define __O_LARGEFILE 0
> +
> +#define F_GETLK64 5 /* Get record locking info. */
> +#define F_SETLK64 6 /* Set record locking info (non-blocking). */
> +#define F_SETLKW64 7 /* Set record locking info (blocking). */
> +#endif
> +
> +struct flock
> +{
> + short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
> + short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
> +#ifndef __USE_FILE_OFFSET64
> + __off_t l_start; /* Offset where the lock begins. */
> + __off_t l_len; /* Size of the locked area; zero means until EOF. */
> +#else
> + __off64_t l_start; /* Offset where the lock begins. */
> + __off64_t l_len; /* Size of the locked area; zero means until EOF. */
> +#endif
> + __pid_t l_pid; /* Process holding the lock. */
> +};
> +
> +#ifdef __USE_LARGEFILE64
> +struct flock64
> +{
> + short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
> + short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
> + __off64_t l_start; /* Offset where the lock begins. */
> + __off64_t l_len; /* Size of the locked area; zero means until EOF. */
> + __pid_t l_pid; /* Process holding the lock. */
> +};
> +#endif
> +
> +/* Include generic Linux declarations. */
> +#include <bits/fcntl-linux.h>
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/bits/procfs.h b/sysdeps/unix/sysv/linux/loongarch/bits/procfs.h
> new file mode 100644
> index 0000000000..2db777b38c
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/bits/procfs.h
> @@ -0,0 +1,52 @@
> +/* Types for registers for sys/procfs.h.
> + 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/>. */
> +
> +#ifndef _SYS_PROCFS_H
> +# error "Never include <bits/procfs.h> directly; use <sys/procfs.h> instead."
> +#endif
> +
> +/* Type for a general-purpose register. */
> +typedef __uint64_t elf_greg_t;
> +
> +/* And the whole bunch of them. We could have used `struct
> + pt_regs' directly in the typedef, but tradition says that
> + the register set is an array, which does have some peculiar
> + semantics, so leave it that way. */
> +#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof (elf_greg_t))
> +typedef elf_greg_t elf_gregset_t[ELF_NGREG];
> +
> +#define ELF_NFPREG 34 /* 32 FPRs + 8-byte byte-vec for fcc + 4-byte FCR */
> +typedef union
> +{
> + double d;
> + float f;
> +} elf_fpreg_t;
> +typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
> +
> +typedef union
> +{
> + double d[2];
> + float f[4];
> +} __attribute__ ((__aligned__ (16))) elf_lsxregset_t[32];
> +
> +typedef union
> +{
> + double d[4];
> + float f[8];
> +} __attribute__ ((__aligned__ (32))) elf_lasxregset_t[32];
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/loongarch/bits/pthread_stack_min.h
> new file mode 100644
> index 0000000000..072c2ade42
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/bits/pthread_stack_min.h
> @@ -0,0 +1,20 @@
> +/* Definition of PTHREAD_STACK_MIN. LoongArch Linux 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/>. */
> +
> +/* Minimum size for a thread. At least two pages with 64k pages. */
> +#define PTHREAD_STACK_MIN 131072
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/bits/sigstack.h b/sysdeps/unix/sysv/linux/loongarch/bits/sigstack.h
> new file mode 100644
> index 0000000000..238c1a98e6
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/bits/sigstack.h
> @@ -0,0 +1,32 @@
> +/* sigstack, sigaltstack definitions.
> + 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/>. */
> +
> +#ifndef _BITS_SIGSTACK_H
> +#define _BITS_SIGSTACK_H 1
> +
> +#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
> +# error "Never include this file directly. Use <signal.h> instead"
> +#endif
> +
> +/* Minimum stack size for a signal handler. */
> +#define MINSIGSTKSZ 4096
> +
> +/* System default stack size. */
> +#define SIGSTKSZ 16384
> +
> +#endif /* bits/sigstack.h */
> diff --git a/sysdeps/unix/sysv/linux/l
Ok.
oongarch/getcontext.S b/sysdeps/unix/sysv/linux/loongarch/getcontext.S
> new file mode 100644
> index 0000000000..43b95e9715
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/getcontext.S
> @@ -0,0 +1,59 @@
> +/* Save current context.
> + 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 "ucontext-macros.h"
> +
> +/* int getcontext (ucontext_t *ucp) */
> +
> + .text
> +LEAF (__getcontext)
> + SAVE_INT_REG (ra, 1, a0)
> + SAVE_INT_REG (sp, 3, a0)
> + SAVE_INT_REG (zero, 4, a0) /* return 0 by overwriting a0. */
> + SAVE_INT_REG (x, 21, a0)
> + SAVE_INT_REG (fp, 22, a0)
> + SAVE_INT_REG (s0, 23, a0)
> + SAVE_INT_REG (s1, 24, a0)
> + SAVE_INT_REG (s2, 25, a0)
> + SAVE_INT_REG (s3, 26, a0)
> + SAVE_INT_REG (s4, 27, a0)
> + SAVE_INT_REG (s5, 28, a0)
> + SAVE_INT_REG (s6, 29, a0)
> + SAVE_INT_REG (s7, 30, a0)
> + SAVE_INT_REG (s8, 31, a0)
> + st.d ra, a0, MCONTEXT_PC
> +
> +/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
> + li.d a3, _NSIG8
> + li.d a2, UCONTEXT_SIGMASK
> + add.d a2, a2, a0
> + ori a1, zero,0
> + li.d a0, SIG_BLOCK
> +
> + li.d a7, SYS_ify (rt_sigprocmask)
> + syscall 0
> + blt a0, zero, 99f
> +
> + jirl $r0, $r1, 0
> +
> +99:
> + b __syscall_error
> +
> +PSEUDO_END (__getcontext)
> +
> +weak_alias (__getcontext, getcontext)
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/localplt.data b/sysdeps/unix/sysv/linux/loongarch/localplt.data
> new file mode 100644
> index 0000000000..817ab2659a
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/localplt.data
> @@ -0,0 +1,12 @@
> +# See scripts/check-localplt.awk for how this file is processed.
> +# PLT use is required for the malloc family and for matherr because
> +# users can define their own functions and have library internals call them.
> +libc.so: calloc
> +libc.so: free
> +libc.so: malloc
> +libc.so: realloc
> +# The TLS-enabled version of these functions is interposed from libc.so.
> +ld.so: _dl_signal_error
> +ld.so: _dl_catch_error
> +ld.so: _dl_signal_exception
> +ld.so: _dl_catch_exception
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/makecontext.c b/sysdeps/unix/sysv/linux/loongarch/makecontext.c
> new file mode 100644
> index 0000000000..94a45bf4ad
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/makecontext.c
> @@ -0,0 +1,81 @@
> +/* Create new context.
> + 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 <sys/asm.h>
> +#include <sys/ucontext.h>
> +#include <stdarg.h>
> +#include <assert.h>
> +
> +void
> +__makecontext (ucontext_t *ucp, void (*func) (void), int argc, long int a0,
> + long int a1, long int a2, long int a3, long int a4, ...)
> +{
> + extern void __start_context (void) attribute_hidden;
> + unsigned long int *sp;
> +
> + _Static_assert(LARCH_REG_NARGS == 8,
> + "__makecontext assumes 8 argument registers");
> +
> + /* Set up the stack. */
> + sp = (unsigned long int *)
> + (((uintptr_t) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size) & ALMASK);
> +
> + /* Set up the register context.
> + ra = s0 = 0, terminating the stack for backtracing purposes.
> + s1 = the function we must call.
> + s2 = the subsequent context to run. */
> + ucp->uc_mcontext.__gregs[LARCH_REG_RA] = (uintptr_t) 0;
> + ucp->uc_mcontext.__gregs[LARCH_REG_S0] = (uintptr_t) 0;
> + ucp->uc_mcontext.__gregs[LARCH_REG_S1] = (uintptr_t) func;
> + ucp->uc_mcontext.__gregs[LARCH_REG_S2] = (uintptr_t) ucp->uc_link;
> + ucp->uc_mcontext.__gregs[LARCH_REG_SP] = (uintptr_t) sp;
> + ucp->uc_mcontext.__pc = (uintptr_t) &__start_context;
> +
> + /* Put args in a0-a7, then put any remaining args on the stack. */
> + ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 0] = (uintptr_t) a0;
> + ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 1] = (uintptr_t) a1;
> + ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 2] = (uintptr_t) a2;
> + ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 3] = (uintptr_t) a3;
> + ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 4] = (uintptr_t) a4;
> +
> + if (__glibc_unlikely (argc > 5))
> + {
> + va_list vl;
> + va_start (vl, a4);
> +
> + long int reg_args = argc < LARCH_REG_NARGS ? argc : LARCH_REG_NARGS;
> + for (long int i = 5; i < reg_args; i++)
> + ucp->uc_mcontext.__gregs[LARCH_REG_A0 + i] = va_arg (vl, unsigned long int);
> +
> + long int stack_args = argc - reg_args;
> + if (stack_args > 0)
> + {
> + sp = (unsigned long int *)
> + (((uintptr_t) sp - stack_args * sizeof (long int)) & ALMASK);
> + ucp->uc_mcontext.__gregs[LARCH_REG_SP] = (uintptr_t) sp;
> + for (long int i = 0; i < stack_args; i++)
> + sp[i] = va_arg (vl, unsigned long int);
> + }
> +
> + va_end (vl);
> + }
> +}
> +
> +weak_alias (__makecontext, makecontext)
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/setcontext.S b/sysdeps/unix/sysv/linux/loongarch/setcontext.S
> new file mode 100644
> index 0000000000..7295900149
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/setcontext.S
> @@ -0,0 +1,100 @@
> +/* Set current context.
> + 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 "sys/regdef.h"
> +#include "ucontext-macros.h"
> +
> +/* int __setcontext (const ucontext_t *ucp)
> +
> + Restores the machine context in UCP and thereby resumes execution
> + in that context.
> +
> + This implementation is intended to be used for *synchronous* context
> + switches only. Therefore, it does not have to restore anything
> + other than the PRESERVED state. */
> +
> + .text
> +LEAF (__setcontext)
> +
> + addi.d sp, sp, -16
> + st.d a0, sp, 0 /* Save ucp to stack */
> +
> +/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */
> + li.d a3, _NSIG8
> + li.d a2, 0
> + li.d a1, UCONTEXT_SIGMASK
> + add.d a1, a1, a0
> + li.d a0, SIG_SETMASK
> +
> + li.d a7, SYS_ify (rt_sigprocmask)
> + syscall 0
> +
> + blt a0, $r0, 99f
> +
> + ld.d t0, sp, 0 /* Load ucp to t0 */
> + cfi_def_cfa (12, 0)
> +
> +/* Note the contents of argument registers will be random
> + unless makecontext() has been called. */
> + RESTORE_INT_REG(ra, 1, t0)
> + RESTORE_INT_REG(sp, 3, t0)
> + RESTORE_INT_REG(a0, 4, t0)
> + RESTORE_INT_REG(a1, 5, t0)
> + RESTORE_INT_REG(a2, 6, t0)
> + RESTORE_INT_REG(a3, 7, t0)
> + RESTORE_INT_REG(a4, 8, t0)
> + RESTORE_INT_REG(a5, 9, t0)
> + RESTORE_INT_REG(a6, 10, t0)
> + RESTORE_INT_REG(a7, 11, t0)
> + RESTORE_INT_REG(x, 21, t0)
> + RESTORE_INT_REG(fp, 22, t0)
> + RESTORE_INT_REG(s0, 23, t0)
> + RESTORE_INT_REG(s1, 24, t0)
> + RESTORE_INT_REG(s2, 25, t0)
> + RESTORE_INT_REG(s3, 26, t0)
> + RESTORE_INT_REG(s4, 27, t0)
> + RESTORE_INT_REG(s5, 28, t0)
> + RESTORE_INT_REG(s6, 29, t0)
> + RESTORE_INT_REG(s7, 30, t0)
> + RESTORE_INT_REG(s8, 31, t0)
> +
> + ld.d t1, t0, MCONTEXT_PC
> + jirl $r0,t1,0
> +
> +99:
> + addi.d sp, sp, 16
> + b __syscall_error
> +
> +PSEUDO_END (__setcontext)
> +weak_alias (__setcontext, setcontext)
> +
> +LEAF (__start_context)
> +
> + /* Terminate call stack by noting ra == 0. Happily, s0 == 0 here. */
> + cfi_register (1, 23)
> +
> + /* Call the function passed to makecontext. */
> + jirl $r1,s1,0
> +
> + /* Invoke subsequent context if present, else exit(0). */
> + ori a0, s2, 0
> + beqz s2, 1f
> + bl __setcontext
> +1:
> + b HIDDEN_JUMPTARGET(exit)
> +
> +PSEUDO_END (__start_context)
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/sigcontextinfo.h b/sysdeps/unix/sysv/linux/loongarch/sigcontextinfo.h
> new file mode 100644
> index 0000000000..5e202bc0b4
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/sigcontextinfo.h
> @@ -0,0 +1,32 @@
> +/* LoongArch definitions for signal handling calling conventions.
> + 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/>. */
> +
> +#ifndef _SIGCONTEXTINFO_H
> +#define _SIGCONTEXTINFO_H
> +
> +#include <stdint.h>
> +#include <sys/ucontext.h>
> +
> +static inline uintptr_t
> +sigcontext_get_pc (const ucontext_t *ctx)
> +{
> + return ctx->uc_mcontext.__pc;
> +}
> +
> +#endif
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/swapcontext.S b/sysdeps/unix/sysv/linux/loongarch/swapcontext.S
> new file mode 100644
> index 0000000000..bb22cd2f00
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/swapcontext.S
> @@ -0,0 +1,95 @@
> +/* Save and set current context.
> + 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 "ucontext-macros.h"
> +
> +/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
> +
> +LEAF (__swapcontext)
> + ori a2, sp, 0 /* Save sp to a2 */
> + addi.d sp, sp, -16
> + st.d a1, sp, 0
> + ori t0, a1, 0
> +
> + SAVE_INT_REG (ra, 1, a0)
> + SAVE_INT_REG (a2, 3, a0) /* Store sp */
> + SAVE_INT_REG (zero, 4, a0) /* return 0 by overwriting a0 */
> + SAVE_INT_REG (x, 21, a0)
> + SAVE_INT_REG (fp, 22, a0)
> + SAVE_INT_REG (s0, 23, a0)
> + SAVE_INT_REG (s1, 24, a0)
> + SAVE_INT_REG (s2, 25, a0)
> + SAVE_INT_REG (s3, 26, a0)
> + SAVE_INT_REG (s4, 27, a0)
> + SAVE_INT_REG (s5, 28, a0)
> + SAVE_INT_REG (s6, 29, a0)
> + SAVE_INT_REG (s7, 30, a0)
> + SAVE_INT_REG (s8, 31, a0)
> +
> + st.d ra, a0, MCONTEXT_PC
> +
> +/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */
> + li.d a3, _NSIG8
> + li.d a2, UCONTEXT_SIGMASK
> + add.d a2, a2, a0
> + li.d a1, UCONTEXT_SIGMASK
> + add.d a1, a1, t0
> + li.d a0, SIG_SETMASK
> +
> + li.d a7, SYS_ify (rt_sigprocmask)
> + syscall 0
> +
> + blt a0, zero, 99f
> +
> + ld.d t0, sp, 0 /* Load a1 to t0 */
> +
> +/* Note the contents of argument registers will be random
> + unless makecontext() has been called. */
> + RESTORE_INT_REG (ra, 1, t0)
> + RESTORE_INT_REG (sp, 3, t0)
> + RESTORE_INT_REG (a0, 4, t0)
> + RESTORE_INT_REG (a1, 5, t0)
> + RESTORE_INT_REG (a2, 6, t0)
> + RESTORE_INT_REG (a3, 7, t0)
> + RESTORE_INT_REG (a4, 8, t0)
> + RESTORE_INT_REG (a5, 9, t0)
> + RESTORE_INT_REG (a6, 10, t0)
> + RESTORE_INT_REG (a7, 11, t0)
> + RESTORE_INT_REG (x, 21, t0)
> + RESTORE_INT_REG (fp, 22, t0)
> + RESTORE_INT_REG (s0, 23, t0)
> + RESTORE_INT_REG (s1, 24, t0)
> + RESTORE_INT_REG (s2, 25, t0)
> + RESTORE_INT_REG (s3, 26, t0)
> + RESTORE_INT_REG (s4, 27, t0)
> + RESTORE_INT_REG (s5, 28, t0)
> + RESTORE_INT_REG (s6, 29, t0)
> + RESTORE_INT_REG (s7, 30, t0)
> + RESTORE_INT_REG (s8, 31, t0)
> +
> + ld.d t1, t0, MCONTEXT_PC
> + jirl $r0, t1, 0
> +
> +
> +99:
> + addi.d sp, sp, 16
> + b __syscall_error
> +
> +PSEUDO_END (__swapcontext)
> +
> +weak_alias (__swapcontext, swapcontext)
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/sys/ucontext.h b/sysdeps/unix/sysv/linux/loongarch/sys/ucontext.h
> new file mode 100644
> index 0000000000..e334a45a44
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/sys/ucontext.h
> @@ -0,0 +1,61 @@
> +/* struct ucontext definition.
> + 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/>. */
> +
> +/* Don't rely on this, the interface is currently messed up and may need to
> + be broken to be fixed. */
> +#ifndef _SYS_UCONTEXT_H
> +#define _SYS_UCONTEXT_H 1
> +
> +#include <features.h>
> +
> +#include <bits/types/sigset_t.h>
> +#include <bits/types/stack_t.h>
> +
> +#ifdef __USE_MISC
> +#define LARCH_NGREG 32
> +
> +#define LARCH_REG_RA 1
> +#define LARCH_REG_SP 3
> +#define LARCH_REG_S0 23
> +#define LARCH_REG_S1 24
> +#define LARCH_REG_A0 4
> +#define LARCH_REG_S2 25
> +#define LARCH_REG_NARGS 8
> +
> +#endif
> +
> +typedef struct mcontext_t
> +{
> + unsigned long long __pc;
> + unsigned long long __gregs[32];
> + unsigned int __flags;
> + unsigned long long __extcontext[0] __attribute__((__aligned__(16)));
> +} mcontext_t;
> +
> +/* Userlevel context. */
> +typedef struct ucontext_t
> +{
> + unsigned long int __uc_flags;
> + struct ucontext_t *uc_link;
> + stack_t uc_stack;
> + sigset_t uc_sigmask;
> + mcontext_t uc_mcontext;
> +} ucontext_t;
> +
> +#endif /* sys/ucontext.h */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/sys/user.h b/sysdeps/unix/sysv/linux/loongarch/sys/user.h
> new file mode 100644
> index 0000000000..55181de816
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/sys/user.h
> @@ -0,0 +1,42 @@
> +/* struct user_regs_struct definition for LoongArch.
> + 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/>. */
> +
> +#ifndef _SYS_USER_H
> +#define _SYS_USER_H 1
> +
> +#include <stdint.h>
> +
> +struct user_regs_struct
> +{
> + /* Saved main processor registers. */
> + uint64_t regs[32];
> +
> + /* Saved special registers. */
> + uint64_t orig_a0;
> + uint64_t csr_era;
> + uint64_t csr_badv;
> + uint64_t reserved[10];
> +};
> +
> +struct user_fp_struct {
> + uint64_t fpr[32];
> + uint64_t fcc;
> + uint32_t fcsr;
> +};
> +
> +#endif /* _SYS_USER_H */
I think it should be ok to use stdint.h types here, although it is not usual
for other ports. AFAIK it is only mainly for GDB.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/ucontext-macros.h b/sysdeps/unix/sysv/linux/loongarch/ucontext-macros.h
> new file mode 100644
> index 0000000000..859eba464b
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/ucontext-macros.h
> @@ -0,0 +1,32 @@
> +/* Macros for ucontext routines.
> + 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/>. */
> +
> +#ifndef _LINUX_LOONGARCH_UCONTEXT_MACROS_H
> +#define _LINUX_LOONGARCH_UCONTEXT_MACROS_H
> +
> +#include <sysdep.h>
> +#include <sys/asm.h>
> +#include "ucontext_i.h"
> +
> +#define SAVE_INT_REG(name, num, base) \
> + REG_S name, base, ((num) *SZREG + MCONTEXT_GREGS)
> +
> +#define RESTORE_INT_REG(name, num, base) \
> + REG_L name, base, ((num) *SZREG + MCONTEXT_GREGS)
> +
> +#endif /* _LINUX_LOONGARCH_UCONTEXT_MACROS_H */
OK.
> diff --git a/sysdeps/unix/sysv/linux/loongarch/ucontext_i.sym b/sysdeps/unix/sysv/linux/loongarch/ucontext_i.sym
> new file mode 100644
> index 0000000000..f27afad56f
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/ucontext_i.sym
> @@ -0,0 +1,31 @@
> +#include <inttypes.h>
> +#include <signal.h>
> +#include <stddef.h>
> +#include <sys/ucontext.h>
> +
> +-- Constants used by the rt_sigprocmask call.
> +
> +SIG_BLOCK
> +SIG_SETMASK
> +
> +_NSIG8 (_NSIG / 8)
> +
> +-- 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_PC mcontext (__pc)
> +MCONTEXT_GREGS mcontext (__gregs)
> +
> +UCONTEXT_SIZE sizeof (ucontext_t)
next prev parent reply other threads:[~2022-07-20 16:37 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-19 1:20 [PATCH v7 00/13] GLIBC LoongArch PATCHES caiyinyu
2022-07-19 1:20 ` [PATCH v7 01/13] LoongArch: Add LoongArch entries to config.h.in caiyinyu
2022-07-21 21:02 ` Adhemerval Zanella Netto
2022-07-19 1:20 ` [PATCH v7 02/13] LoongArch: Add relocations and ELF flags to elf.h and scripts/glibcelf.py caiyinyu
2022-07-21 21:02 ` Adhemerval Zanella Netto
2022-07-19 1:20 ` [PATCH v7 03/13] LoongArch: ABI Implementation caiyinyu
2022-07-20 12:29 ` Adhemerval Zanella Netto
2022-07-19 1:20 ` [PATCH v7 04/13] LoongArch: Thread-Local Storage Support caiyinyu
2022-07-20 14:34 ` Adhemerval Zanella Netto
2022-07-19 1:20 ` [PATCH v7 05/13] LoongArch: Generic <math.h> and soft-fp Routines caiyinyu
2022-07-20 13:04 ` Adhemerval Zanella Netto
2022-07-19 1:20 ` [PATCH v7 06/13] LoongArch: Atomic and Locking Routines caiyinyu
2022-07-20 14:32 ` Adhemerval Zanella Netto
2022-07-19 1:20 ` [PATCH v7 07/13] LoongArch: Linux Syscall Interface caiyinyu
2022-07-20 14:35 ` Adhemerval Zanella Netto
2022-07-27 5:27 ` WANG Xuerui
2022-07-27 5:32 ` WANG Xuerui
2022-07-27 11:16 ` Adhemerval Zanella Netto
2022-07-27 13:01 ` WANG Xuerui
2022-07-27 19:22 ` Adhemerval Zanella Netto
2022-07-19 1:20 ` [PATCH v7 08/13] LoongArch: Linux ABI caiyinyu
2022-07-20 16:37 ` Adhemerval Zanella Netto [this message]
2022-07-20 17:19 ` [PATCH v7 00/13] GLIBC LoongArch PATCHES Adhemerval Zanella Netto
2022-07-21 2:44 ` caiyinyu
2022-07-24 9:49 ` WANG Xuerui
2022-07-24 11:51 ` Xi Ruoyao
2022-07-24 12:02 ` WANG Xuerui
2022-07-25 8:21 ` caiyinyu
2022-07-25 8:28 ` Xi Ruoyao
2022-07-25 1:58 ` 刘振松
2022-07-25 8:01 ` Xi Ruoyao
2022-07-25 13:27 ` Adhemerval Zanella Netto
2022-07-25 14:14 ` caiyinyu
2022-07-26 12:35 ` caiyinyu
2022-07-26 12:42 ` Adhemerval Zanella Netto
2022-07-26 14:00 ` Mark Wielaard
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