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RISC-V: Linux ABI

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Linux-specific code that is required for maintaining ABI compatibility.
This doesn't contain the actual system call interface, that is split out
in order to avoid having a patch that's too big.

2018-01-29  Palmer Dabbelt  <palmer@sifive.com>

        * sysdeps/riscv/nptl/pthread-offsets.h: New file.
        * sysdeps/riscv/nptl/pthreaddef.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/bits/fcntl.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/bits/mman.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/dl-cache.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/flush-icache.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/getcontext.S: Likewise.
        * sysdeps/unix/sysv/linux/riscv/init-first.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/libc-vdso.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/makecontext.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/readelflib.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/register-dump.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/setcontext.S: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/swapcontext.S: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/cachectl.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/procfs.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/ucontext.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/user.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/ucontext-macros.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/ucontext_i.sym: Likewise.
This commit is contained in:
Palmer Dabbelt 2018-01-29 10:28:32 -08:00
parent 36960f0c76
commit 7f33b09c65
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24 changed files with 1445 additions and 0 deletions
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22
ChangeLog
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@ -105,6 +105,28 @@
* sysdeps/unix/sysv/linux/riscv/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/vfork.S: Likewise.
* sysdeps/riscv/nptl/pthread-offsets.h: New file.
* sysdeps/riscv/nptl/pthreaddef.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/bits/fcntl.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/bits/mman.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/dl-cache.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/flush-icache.c: Likewise.
* sysdeps/unix/sysv/linux/riscv/getcontext.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/init-first.c: Likewise.
* sysdeps/unix/sysv/linux/riscv/libc-vdso.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/makecontext.c: Likewise.
* sysdeps/unix/sysv/linux/riscv/readelflib.c: Likewise.
* sysdeps/unix/sysv/linux/riscv/register-dump.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/setcontext.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/swapcontext.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/sys/cachectl.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/sys/procfs.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/sys/ucontext.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/sys/user.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/ucontext-macros.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/ucontext_i.sym: Likewise.
2018-01-29 Florian Weimer <fweimer@redhat.com>

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sysdeps/riscv/nptl/pthread-offsets.h Normal file
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/* RISC-V pthread offsets
Copyright (C) 2017-2018 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
<http://www.gnu.org/licenses/>. */
#define __PTHREAD_MUTEX_NUSERS_OFFSET 12
#define __PTHREAD_MUTEX_KIND_OFFSET 16
#define __PTHREAD_MUTEX_SPINS_OFFSET 20
#define __PTHREAD_MUTEX_ELISION_OFFSET 22
#define __PTHREAD_MUTEX_LIST_OFFSET 24

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sysdeps/riscv/nptl/pthreaddef.h Normal file
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/* pthread machine parameter definitions, RISC-V version.
Copyright (C) 2011-2018 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
<http://www.gnu.org/licenses/>. */
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
/* 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
/* Alignment requirement for TCB. */
#define TCB_ALIGNMENT 16
/* Location of current stack frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)

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sysdeps/unix/sysv/linux/riscv/bits/fcntl.h Normal file
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/* O_*, F_*, FD_* bit values for Linux / RISC-V.
Copyright (C) 2011-2018 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
<http://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'). */
#if __WORDSIZE == 64 || !defined __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>

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sysdeps/unix/sysv/linux/riscv/bits/mman.h Normal file
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/* Definitions for POSIX memory map interface. Linux/RISC-V version.
Copyright (C) 1997-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_MMAN_H
# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
#endif
#ifdef __USE_MISC
# define MAP_GROWSDOWN 0x00100 /* Stack-like segment. */
# define MAP_DENYWRITE 0x00800 /* ETXTBSY. */
# define MAP_EXECUTABLE 0x01000 /* Mark it as an executable. */
# define MAP_LOCKED 0x02000 /* Lock the mapping. */
# define MAP_NORESERVE 0x04000 /* Don't check for reservations. */
# define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */
# define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
# define MAP_STACK 0x20000 /* Allocation is for a stack. */
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
#endif
/* Include generic Linux declarations. */
#include <bits/mman-linux.h>

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sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h Normal file
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/* Machine-dependent signal context structure for Linux. RISC-V version.
Copyright (C) 1996-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef _BITS_SIGCONTEXT_H
#define _BITS_SIGCONTEXT_H 1
#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
#endif
struct sigcontext {
/* gregs[0] holds the program counter. */
unsigned long int gregs[32];
unsigned long long int fpregs[66] __attribute__ ((__aligned__ (16)));
};
#endif

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/* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
Copyright (C) 2003-2018 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
<http://www.gnu.org/licenses/>. */
#include <ldconfig.h>
/* For now we only support the natural XLEN ABI length on all targets, so the
only bits that need to go into ld.so.cache are the FLEG ABI length. */
#if defined __riscv_float_abi_double
# define _DL_CACHE_DEFAULT_ID (FLAG_RISCV_FLOAT_ABI_DOUBLE | FLAG_ELF_LIBC6)
#else
# define _DL_CACHE_DEFAULT_ID (FLAG_RISCV_FLOAT_ABI_SOFT | FLAG_ELF_LIBC6)
#endif
#define _dl_cache_check_flags(flags) \
((flags) == _DL_CACHE_DEFAULT_ID)
/* If given a path to one of our library directories, adds every library
directory via add_dir (), otherwise just adds the giver directory. On
RISC-V, libraries can be found in paths ending in:
- /lib64/lp64d
- /lib64/lp64
- /lib (only ld.so)
so this will add all of those paths.
According to Joseph Myers:
My reasoning for that would be: generic autoconf-configured (etc.)
software may only know about using the lib directory, so you want the
lib directory to be searched regardless of the ABI - but it's also
useful to be able to e.g. list /usr/local/lib in /etc/ld.so.conf for all
architectures and have that automatically imply /usr/local/lib64/lp64d
etc. so that libraries can be found that come from software that does
use the ABI-specific directories. */
#define add_system_dir(dir) \
do \
{ \
size_t len = strlen (dir); \
char path[len + 9]; \
memcpy (path, dir, len + 1); \
if (len >= 12 && ! memcmp(path + len - 12, "/lib64/lp64d", 12)) \
{ \
len -= 8; \
path[len] = '\0'; \
} \
if (len >= 11 && ! memcmp(path + len - 11, "/lib64/lp64", 11)) \
{ \
len -= 7; \
path[len] = '\0'; \
} \
add_dir (path); \
if (len >= 4 && ! memcmp(path + len - 4, "/lib", 4)) \
{ \
memcpy (path + len, "64/lp64d", 9); \
add_dir (path); \
memcpy (path + len, "64/lp64", 8); \
add_dir (path); \
} \
} while (0)
#include_next <dl-cache.h>

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/* RISC-V instruction cache flushing VDSO calls
Copyright (C) 2017-2018 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
<http://www.gnu.org/licenses/>. */
#include <dl-vdso.h>
#include <stdlib.h>
#include <atomic.h>
#include <sys/cachectl.h>
#include <asm/syscalls.h>
typedef int (*func_type) (void *, void *, unsigned long int);
static int
__riscv_flush_icache_syscall (void *start, void *end, unsigned long int flags)
{
return INLINE_SYSCALL (riscv_flush_icache, 3, start, end, flags);
}
static func_type
__lookup_riscv_flush_icache (void)
{
PREPARE_VERSION_KNOWN (linux_version, LINUX_4_15);
func_type func = _dl_vdso_vsym ("__vdso_flush_icache", &linux_version);
/* If there is no vDSO entry then call the system call directly. All Linux
versions provide the vDSO entry, but QEMU's user-mode emulation doesn't
provide a vDSO. */
if (!func)
func = &__riscv_flush_icache_syscall;
return func;
}
#ifdef SHARED
# define INIT_ARCH()
libc_ifunc (__riscv_flush_icache, __lookup_riscv_flush_icache ())
#else
int
__riscv_flush_icache (void *start, void *end, unsigned long int flags)
{
static volatile func_type cached_func;
func_type func = atomic_load_relaxed (&cached_func);
if (!func)
{
func = __lookup_riscv_flush_icache ();
atomic_store_relaxed (&cached_func, func);
}
return func (start, end, flags);
}
#endif

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/* Save current context.
Copyright (C) 2009-2018 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
<http://www.gnu.org/licenses/>. */
#include "ucontext-macros.h"
/* int getcontext (ucontext_t *ucp) */
.text
LEAF (__getcontext)
SAVE_INT_REG (ra, 0, a0)
SAVE_INT_REG (ra, 1, a0)
SAVE_INT_REG (sp, 2, a0)
SAVE_INT_REG (s0, 8, a0)
SAVE_INT_REG (s1, 9, a0)
SAVE_INT_REG (x0, 10, a0) /* return 0 by overwriting a0. */
SAVE_INT_REG (s2, 18, a0)
SAVE_INT_REG (s3, 19, a0)
SAVE_INT_REG (s4, 20, a0)
SAVE_INT_REG (s5, 21, a0)
SAVE_INT_REG (s6, 22, a0)
SAVE_INT_REG (s7, 23, a0)
SAVE_INT_REG (s8, 24, a0)
SAVE_INT_REG (s9, 25, a0)
SAVE_INT_REG (s10, 26, a0)
SAVE_INT_REG (s11, 27, a0)
#ifndef __riscv_float_abi_soft
frsr a1
SAVE_FP_REG (fs0, 8, a0)
SAVE_FP_REG (fs1, 9, a0)
SAVE_FP_REG (fs2, 18, a0)
SAVE_FP_REG (fs3, 19, a0)
SAVE_FP_REG (fs4, 20, a0)
SAVE_FP_REG (fs5, 21, a0)
SAVE_FP_REG (fs6, 22, a0)
SAVE_FP_REG (fs7, 23, a0)
SAVE_FP_REG (fs8, 24, a0)
SAVE_FP_REG (fs9, 25, a0)
SAVE_FP_REG (fs10, 26, a0)
SAVE_FP_REG (fs11, 27, a0)
sw a1, MCONTEXT_FSR(a0)
#endif /* __riscv_float_abi_soft */
/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
li a3, _NSIG8
add a2, a0, UCONTEXT_SIGMASK
mv a1, zero
li a0, SIG_BLOCK
li a7, SYS_ify (rt_sigprocmask)
scall
bltz a0, 99f
ret
99: j __syscall_error
PSEUDO_END (__getcontext)
weak_alias (__getcontext, getcontext)

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/* RISC-V VDSO initialization
Copyright (C) 2017-2018 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
<http://www.gnu.org/licenses/>. */
#ifdef SHARED
# include <dl-vdso.h>
# include <libc-vdso.h>
long int (*VDSO_SYMBOL (getcpu)) (unsigned int *, unsigned int *, void *)
attribute_hidden;
long int (*VDSO_SYMBOL (gettimeofday)) (struct timeval *, void *)
attribute_hidden;
long int (*VDSO_SYMBOL (clock_gettime)) (clockid_t, struct timespec *)
attribute_hidden;
long int (*VDSO_SYMBOL (clock_getres)) (clockid_t, struct timespec *)
attribute_hidden;
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION_KNOWN (linux_version, LINUX_4_15);
void *p = _dl_vdso_vsym ("__vdso_getcpu", &linux_version);
PTR_MANGLE (p);
VDSO_SYMBOL (getcpu) = p;
p = _dl_vdso_vsym ("__vdso_gettimeofday", &linux_version);
PTR_MANGLE (p);
VDSO_SYMBOL (gettimeofday) = p;
p = _dl_vdso_vsym ("__vdso_clock_gettime", &linux_version);
PTR_MANGLE (p);
VDSO_SYMBOL (clock_gettime) = p;
p = _dl_vdso_vsym ("__vdso_clock_getres", &linux_version);
PTR_MANGLE (p);
VDSO_SYMBOL (clock_getres) = p;
}
# define VDSO_SETUP _libc_vdso_platform_setup
#endif
#include <csu/init-first.c>

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/* RISC-V VDSO function declarations
Copyright (C) 2017-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef _LIBC_VDSO_H
#define _LIBC_VDSO_H
#ifdef SHARED
# include <sysdep-vdso.h>
extern long int (*VDSO_SYMBOL (getcpu)) (unsigned int *, unsigned int *, void *)
attribute_hidden;
extern long int (*VDSO_SYMBOL (gettimeofday)) (struct timeval *, void *)
attribute_hidden;
extern long int (*VDSO_SYMBOL (clock_gettime)) (clockid_t, struct timespec *)
attribute_hidden;
extern long int (*VDSO_SYMBOL (clock_getres)) (clockid_t, struct timespec *)
attribute_hidden;
#endif
#endif /* _LIBC_VDSO_H */

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/* Create new context. RISC-V version.
Copyright (C) 2001-2018 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
<http://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;
long int i, sp;
_Static_assert (REG_NARGS == 8, "__makecontext assumes 8 argument registers");
/* Set up the stack. */
sp = ((long int) 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[REG_RA] = 0;
ucp->uc_mcontext.__gregs[REG_S0] = 0;
ucp->uc_mcontext.__gregs[REG_S1] = (long int) func;
ucp->uc_mcontext.__gregs[REG_S2] = (long int) ucp->uc_link;
ucp->uc_mcontext.__gregs[REG_SP] = sp;
ucp->uc_mcontext.__gregs[REG_PC] = (long int) &__start_context;
/* Put args in a0-a7, then put any remaining args on the stack. */
ucp->uc_mcontext.__gregs[REG_A0 + 0] = a0;
ucp->uc_mcontext.__gregs[REG_A0 + 1] = a1;
ucp->uc_mcontext.__gregs[REG_A0 + 2] = a2;
ucp->uc_mcontext.__gregs[REG_A0 + 3] = a3;
ucp->uc_mcontext.__gregs[REG_A0 + 4] = a4;
if (__glibc_unlikely (argc > 5))
{
va_list vl;
va_start (vl, a4);
long reg_args = argc < REG_NARGS ? argc : REG_NARGS;
for (i = 5; i < reg_args; i++)
ucp->uc_mcontext.__gregs[REG_A0 + i] = va_arg (vl, long);
long int stack_args = argc - reg_args;
if (stack_args > 0)
{
sp = (sp - stack_args * sizeof (long int)) & ALMASK;
ucp->uc_mcontext.__gregs[REG_SP] = sp;
for (i = 0; i < stack_args; i++)
((long int *) sp)[i] = va_arg (vl, long int);
}
va_end (vl);
}
}
weak_alias (__makecontext, makecontext)

96
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/* Support for reading ELF files.
Copyright (C) 1999-2018 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
<http://www.gnu.org/licenses/>. */
int process_elf32_file (const char *file_name, const char *lib, int *flag,
unsigned int *osversion, char **soname,
void *file_contents, size_t file_length);
int process_elf64_file (const char *file_name, const char *lib, int *flag,
unsigned int *osversion, char **soname,
void *file_contents, size_t file_length);
/* The ELF flags supported by our current glibc port:
- EF_RISCV_FLOAT_ABI: We support the soft and double ABIs.
- EF_RISCV_RVC: While the Linux ABI mandates the presence of the C
extension, we can still support libraries compiled without that extension
so we just ignore this flag.
- EF_RISCV_RVE: glibc (and Linux) don't support RV32E based systems.
- EF_RISCV_TSO: The TSO extension isn't supported, as doing so would require
some mechanism to ensure that the TSO extension is enabled which doesn't
currently exist. */
#define SUPPORTED_ELF_FLAGS (EF_RISCV_FLOAT_ABI | EF_RISCV_RVC)
/* Returns 0 if everything is ok, != 0 in case of error. */
int
process_elf_file (const char *file_name, const char *lib, int *flag,
unsigned int *osversion, char **soname, void *file_contents,
size_t file_length)
{
ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents;
Elf32_Ehdr *elf32_header = (Elf32_Ehdr *) elf_header;
int ret;
long flags;
/* RISC-V libraries are always libc.so.6+. */
*flag = FLAG_ELF_LIBC6;
if (elf_header->e_ident [EI_CLASS] == ELFCLASS32)
{
ret = process_elf32_file (file_name, lib, flag, osversion, soname,
file_contents, file_length);
flags = elf32_header->e_flags;
}
else
{
ret = process_elf64_file (file_name, lib, flag, osversion, soname,
file_contents, file_length);
flags = elf32_header->e_flags;
}
/* RISC-V linkers encode the floating point ABI as part of the ELF headers. */
switch (flags & EF_RISCV_FLOAT_ABI)
{
case EF_RISCV_FLOAT_ABI_SOFT:
*flag |= FLAG_RISCV_FLOAT_ABI_SOFT;
break;
case EF_RISCV_FLOAT_ABI_DOUBLE:
*flag |= FLAG_RISCV_FLOAT_ABI_DOUBLE;
break;
default:
return 1;
}
/* If there are any other ELF flags set then glibc doesn't support this
library. */
if (flags & ~SUPPORTED_ELF_FLAGS)
return 1;
return ret;
}
#undef __ELF_NATIVE_CLASS
#undef process_elf_file
#define process_elf_file process_elf32_file
#define __ELF_NATIVE_CLASS 32
#include "elf/readelflib.c"
#undef __ELF_NATIVE_CLASS
#undef process_elf_file
#define process_elf_file process_elf64_file
#define __ELF_NATIVE_CLASS 64
#include "elf/readelflib.c"

63
sysdeps/unix/sysv/linux/riscv/register-dump.h Normal file
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/* Dump registers.
Copyright (C) 2000-2018 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
<http://www.gnu.org/licenses/>. */
#include <unistd.h>
#include <string.h>
#include <_itoa.h>
static void
hexvalue (unsigned long int value, char *buf, size_t len)
{
char *cp = _itoa_word (value, buf + len, 16, 0);
while (cp > buf)
*--cp = '0';
}
#define REGDUMP_NREGS 32
#define REGDUMP_PER_LINE (80 / (__WORDSIZE / 4 + 4))
static void
register_dump (int fd, ucontext_t *ctx)
{
int i;
char regvalue[__WORDSIZE / 4 + 1];
char str[82 * ((REGDUMP_NREGS + REGDUMP_PER_LINE - 1) / REGDUMP_PER_LINE)];
static const char names[REGDUMP_NREGS][4] = {
"pc", "ra", "sp", "gp", "tp", "t0", "t1", "t2",
"s0", "s1", "a0", "a1", "a2", "a3", "a4", "a5",
"a6", "a7", "s2", "s3", "s4", "s5", "s6", "s7",
"s8", "s9", "sA", "sB", "t3", "t4", "t5", "t6"
};
str[0] = 0;
for (i = 0; i < REGDUMP_NREGS; i++)
{
strcat (str, names[i]);
strcat (str, " ");
hexvalue (ctx->uc_mcontext.__gregs[i], regvalue, __WORDSIZE / 4);
strcat (str, regvalue);
if ((i + 1) % REGDUMP_PER_LINE == 0)
strcat (str, "\n");
}
write (fd, str, strlen (str));
}
#define REGISTER_DUMP register_dump (fd, ctx)

53
sysdeps/unix/sysv/linux/riscv/rv64/jmp_buf-macros.h Normal file
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/* jump buffer constants for RISC-V
Copyright (C) 2017-2018 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
<http://www.gnu.org/licenses/>. */
/* Produced by this program:
#include <stdio.h>
#include <unistd.h>
#include <setjmp.h>
#include <stddef.h>
int main (int argc, char **argv)
{
printf ("#define JMP_BUF_SIZE %d\n", sizeof (jmp_buf));
printf ("#define JMP_BUF_ALIGN %d\n", __alignof__ (jmp_buf));
printf ("#define SIGJMP_BUF_SIZE %d\n", sizeof (sigjmp_buf));
printf ("#define SIGJMP_BUF_ALIGN %d\n", __alignof__ (sigjmp_buf));
printf ("#define MASK_WAS_SAVED_OFFSET %d\n", offsetof (struct __jmp_buf_tag, __mask_was_saved));
printf ("#define SAVED_MASK_OFFSET %d\n", offsetof (struct __jmp_buf_tag, __saved_mask));
} */
#if defined __riscv_float_abi_soft
# define JMP_BUF_SIZE 248
# define JMP_BUF_ALIGN 8
# define SIGJMP_BUF_SIZE 248
# define SIGJMP_BUF_ALIGN 8
# define MASK_WAS_SAVED_OFFSET 112
# define SAVED_MASK_OFFSET 120
#elif defined __riscv_float_abi_double
# define JMP_BUF_SIZE 344
# define JMP_BUF_ALIGN 8
# define SIGJMP_BUF_SIZE 344
# define SIGJMP_BUF_ALIGN 8
# define MASK_WAS_SAVED_OFFSET 208
# define SAVED_MASK_OFFSET 216
#else
# error "Unknown RISC-V floating-point ABI"
#endif

114
sysdeps/unix/sysv/linux/riscv/setcontext.S Normal file
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/* Set current context.
Copyright (C) 2009-2018 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
<http://www.gnu.org/licenses/>. */
#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)
mv t0, a0 /* Save ucp into t0. */
/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */
li a3, _NSIG8
mv a2, zero
add a1, a0, UCONTEXT_SIGMASK
li a0, SIG_SETMASK
li a7, SYS_ify (rt_sigprocmask)
scall
bltz a0, 99f
cfi_def_cfa (t0, 0)
#ifndef __riscv_float_abi_soft
lw t1, MCONTEXT_FSR(t0)
RESTORE_FP_REG_CFI (fs0, 8, t0)
RESTORE_FP_REG_CFI (fs1, 9, t0)
RESTORE_FP_REG_CFI (fs2, 18, t0)
RESTORE_FP_REG_CFI (fs3, 19, t0)
RESTORE_FP_REG_CFI (fs4, 20, t0)
RESTORE_FP_REG_CFI (fs5, 21, t0)
RESTORE_FP_REG_CFI (fs6, 22, t0)
RESTORE_FP_REG_CFI (fs7, 23, t0)
RESTORE_FP_REG_CFI (fs8, 24, t0)
RESTORE_FP_REG_CFI (fs9, 25, t0)
RESTORE_FP_REG_CFI (fs10, 26, t0)
RESTORE_FP_REG_CFI (fs11, 27, t0)
fssr t1
#endif /* __riscv_float_abi_soft */
/* Note the contents of argument registers will be random
unless makecontext() has been called. */
RESTORE_INT_REG (t1, 0, t0)
RESTORE_INT_REG_CFI (ra, 1, t0)
RESTORE_INT_REG (sp, 2, t0)
RESTORE_INT_REG_CFI (s0, 8, t0)
RESTORE_INT_REG_CFI (s1, 9, t0)
RESTORE_INT_REG (a0, 10, t0)
RESTORE_INT_REG (a1, 11, t0)
RESTORE_INT_REG (a2, 12, t0)
RESTORE_INT_REG (a3, 13, t0)
RESTORE_INT_REG (a4, 14, t0)
RESTORE_INT_REG (a5, 15, t0)
RESTORE_INT_REG (a6, 16, t0)
RESTORE_INT_REG (a7, 17, t0)
RESTORE_INT_REG_CFI (s2, 18, t0)
RESTORE_INT_REG_CFI (s3, 19, t0)
RESTORE_INT_REG_CFI (s4, 20, t0)
RESTORE_INT_REG_CFI (s5, 21, t0)
RESTORE_INT_REG_CFI (s6, 22, t0)
RESTORE_INT_REG_CFI (s7, 23, t0)
RESTORE_INT_REG_CFI (s8, 24, t0)
RESTORE_INT_REG_CFI (s9, 25, t0)
RESTORE_INT_REG_CFI (s10, 26, t0)
RESTORE_INT_REG_CFI (s11, 27, t0)
jr t1
99: j __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 (ra, s0)
/* Call the function passed to makecontext. */
jalr s1
/* Invoke subsequent context if present, else exit(0). */
mv a0, s2
beqz s2, 1f
jal __setcontext
1: j exit
PSEUDO_END (__start_context)

28
sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h Normal file
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/* RISC-V definitions for signal handling calling conventions.
Copyright (C) 2000-2018 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
<http://www.gnu.org/licenses/>. */
#include <sys/ucontext.h>
#define SIGCONTEXT siginfo_t *_si, ucontext_t *
#define SIGCONTEXT_EXTRA_ARGS _si,
#define GET_PC(ctx) ((void *) ctx->uc_mcontext.__gregs[REG_PC])
#define GET_FRAME(ctx) ((void *) ctx->uc_mcontext.__gregs[REG_S0])
#define GET_STACK(ctx) ((void *) ctx->uc_mcontext.__gregs[REG_SP])
#define CALL_SIGHANDLER(handler, signo, ctx) \
(handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))

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sysdeps/unix/sysv/linux/riscv/swapcontext.S Normal file
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/* Save and set current context.
Copyright (C) 2009-2018 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
<http://www.gnu.org/licenses/>. */
#include "ucontext-macros.h"
/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
LEAF (__swapcontext)
mv t0, a1 /* Save ucp into t0. */
SAVE_INT_REG (ra, 0, a0)
SAVE_INT_REG (ra, 1, a0)
SAVE_INT_REG (sp, 2, a0)
SAVE_INT_REG (s0, 8, a0)
SAVE_INT_REG (s1, 9, a0)
SAVE_INT_REG (x0, 10, a0) /* return 0 by overwriting a0. */
SAVE_INT_REG (s2, 18, a0)
SAVE_INT_REG (s3, 19, a0)
SAVE_INT_REG (s4, 20, a0)
SAVE_INT_REG (s5, 21, a0)
SAVE_INT_REG (s6, 22, a0)
SAVE_INT_REG (s7, 23, a0)
SAVE_INT_REG (s8, 24, a0)
SAVE_INT_REG (s9, 25, a0)
SAVE_INT_REG (s10, 26, a0)
SAVE_INT_REG (s11, 27, a0)
#ifndef __riscv_float_abi_soft
frsr a1
SAVE_FP_REG (fs0, 8, a0)
SAVE_FP_REG (fs1, 9, a0)
SAVE_FP_REG (fs2, 18, a0)
SAVE_FP_REG (fs3, 19, a0)
SAVE_FP_REG (fs4, 20, a0)
SAVE_FP_REG (fs5, 21, a0)
SAVE_FP_REG (fs6, 22, a0)
SAVE_FP_REG (fs7, 23, a0)
SAVE_FP_REG (fs8, 24, a0)
SAVE_FP_REG (fs9, 25, a0)
SAVE_FP_REG (fs10, 26, a0)
SAVE_FP_REG (fs11, 27, a0)
sw a1, MCONTEXT_FSR(a0)
#endif /* __riscv_float_abi_soft */
/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */
li a3, _NSIG8
add a2, a0, UCONTEXT_SIGMASK
add a1, t0, UCONTEXT_SIGMASK
li a0, SIG_SETMASK
li a7, SYS_ify (rt_sigprocmask)
scall
bltz a0, 99f
#ifndef __riscv_float_abi_soft
lw t1, MCONTEXT_FSR(t0)
RESTORE_FP_REG (fs0, 8, t0)
RESTORE_FP_REG (fs1, 9, t0)
RESTORE_FP_REG (fs2, 18, t0)
RESTORE_FP_REG (fs3, 19, t0)
RESTORE_FP_REG (fs4, 20, t0)
RESTORE_FP_REG (fs5, 21, t0)
RESTORE_FP_REG (fs6, 22, t0)
RESTORE_FP_REG (fs7, 23, t0)
RESTORE_FP_REG (fs8, 24, t0)
RESTORE_FP_REG (fs9, 25, t0)
RESTORE_FP_REG (fs10, 26, t0)
RESTORE_FP_REG (fs11, 27, t0)
fssr t1
#endif /* __riscv_float_abi_soft */
/* Note the contents of argument registers will be random
unless makecontext() has been called. */
RESTORE_INT_REG (t1, 0, t0)
RESTORE_INT_REG (ra, 1, t0)
RESTORE_INT_REG (sp, 2, t0)
RESTORE_INT_REG (s0, 8, t0)
RESTORE_INT_REG (s1, 9, t0)
RESTORE_INT_REG (a0, 10, t0)
RESTORE_INT_REG (a1, 11, t0)
RESTORE_INT_REG (a2, 12, t0)
RESTORE_INT_REG (a3, 13, t0)
RESTORE_INT_REG (a4, 14, t0)
RESTORE_INT_REG (a5, 15, t0)
RESTORE_INT_REG (a6, 16, t0)
RESTORE_INT_REG (a7, 17, t0)
RESTORE_INT_REG (s2, 18, t0)
RESTORE_INT_REG (s3, 19, t0)
RESTORE_INT_REG (s4, 20, t0)
RESTORE_INT_REG (s5, 21, t0)
RESTORE_INT_REG (s6, 22, t0)
RESTORE_INT_REG (s7, 23, t0)
RESTORE_INT_REG (s8, 24, t0)
RESTORE_INT_REG (s9, 25, t0)
RESTORE_INT_REG (s10, 26, t0)
RESTORE_INT_REG (s11, 27, t0)
jr t1
99: j __syscall_error
PSEUDO_END (__swapcontext)
weak_alias (__swapcontext, swapcontext)

32
sysdeps/unix/sysv/linux/riscv/sys/cachectl.h Normal file
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/* RISC-V instruction cache flushing interface
Copyright (C) 2017-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_CACHECTL_H
#define _SYS_CACHECTL_H 1
#include <features.h>
__BEGIN_DECLS
extern int __riscv_flush_icache (void *__start, void *__end,
unsigned long int __flags);
__END_DECLS
#endif /* sys/cachectl.h */

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/* Core image file related definitions, RISC-V version.
Copyright (C) 1996-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_PROCFS_H
#define _SYS_PROCFS_H 1
/* This is somehow modelled after the file of the same name on SysVr4
systems. It provides a definition of the core file format for ELF
used on Linux. */
#include <features.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/user.h>
#include <sys/ucontext.h>
/* ELF register definitions */
#define ELF_NGREG NGREG
#define ELF_NFPREG NFPREG
typedef unsigned long int elf_greg_t;
typedef unsigned long int elf_gregset_t[32];
typedef union __riscv_mc_fp_state elf_fpregset_t;
__BEGIN_DECLS
struct elf_siginfo
{
int si_signo; /* Signal number. */
int si_code; /* Extra code. */
int si_errno; /* Errno. */
};
/* Definitions to generate Intel SVR4-like core files. These mostly
have the same names as the SVR4 types with "elf_" tacked on the
front to prevent clashes with linux definitions, and the typedef
forms have been avoided. This is mostly like the SVR4 structure,
but more Linuxy, with things that Linux does not support and which
gdb doesn't really use excluded. Fields present but not used are
marked with "XXX". */
struct elf_prstatus
{
struct elf_siginfo pr_info; /* Info associated with signal. */
short int pr_cursig; /* Current signal. */
unsigned long int pr_sigpend; /* Set of pending signals. */
unsigned long int pr_sighold; /* Set of held signals. */
__pid_t pr_pid;
__pid_t pr_ppid;
__pid_t pr_pgrp;
__pid_t pr_sid;
struct timeval pr_utime; /* User time. */
struct timeval pr_stime; /* System time. */
struct timeval pr_cutime; /* Cumulative user time. */
struct timeval pr_cstime; /* Cumulative system time. */
elf_gregset_t pr_reg; /* GP registers. */
int pr_fpvalid; /* True if math copro being used. */
};
#define ELF_PRARGSZ (80) /* Number of chars for args */
struct elf_prpsinfo
{
char pr_state; /* Numeric process state. */
char pr_sname; /* Char for pr_state. */
char pr_zomb; /* Zombie. */
char pr_nice; /* Nice val. */
unsigned long int pr_flag; /* Flags. */
long int pr_uid;
long int pr_gid;
int pr_pid, pr_ppid, pr_pgrp, pr_sid;
/* Lots missing */
char pr_fname[16]; /* Filename of executable. */
char pr_psargs[ELF_PRARGSZ]; /* Initial part of arg list. */
};
/* The rest of this file provides the types for emulation of the
Solaris <proc_service.h> interfaces that should be implemented by
users of libthread_db. */
/* Addresses. */
typedef void *psaddr_t;
/* Register sets. Linux has different names. */
typedef elf_gregset_t prgregset_t;
typedef elf_fpregset_t prfpregset_t;
/* We don't have any differences between processes and threads,
therefore habe only ine PID type. */
typedef __pid_t lwpid_t;
/* Process status and info. In the end we do provide typedefs for them. */
typedef struct elf_prstatus prstatus_t;
typedef struct elf_prpsinfo prpsinfo_t;
__END_DECLS
#endif /* sys/procfs.h */

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/* struct ucontext definition, RISC-V version.
Copyright (C) 1997-2018 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
<http://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>
typedef unsigned long int __riscv_mc_gp_state[32];
#ifdef __USE_MISC
# define NGREG 32
# define REG_PC 0
# define REG_RA 1
# define REG_SP 2
# define REG_TP 4
# define REG_S0 8
# define REG_S1 9
# define REG_A0 10
# define REG_S2 18
# define REG_NARGS 8
typedef unsigned long int greg_t;
/* Container for all general registers. */
typedef __riscv_mc_gp_state gregset_t;
/* Container for floating-point state. */
typedef union __riscv_mc_fp_state fpregset_t;
#endif
struct __riscv_mc_f_ext_state
{
unsigned int __f[32];
unsigned int __fcsr;
};
struct __riscv_mc_d_ext_state
{
unsigned long long int __f[32];
unsigned int __fcsr;
};
struct __riscv_mc_q_ext_state
{
unsigned long long int __f[64] __attribute__ ((__aligned__ (16)));
unsigned int __fcsr;
/* Reserved for expansion of sigcontext structure. Currently zeroed
upon signal, and must be zero upon sigreturn. */
unsigned int __glibc_reserved[3];
};
union __riscv_mc_fp_state
{
struct __riscv_mc_f_ext_state __f;
struct __riscv_mc_d_ext_state __d;
struct __riscv_mc_q_ext_state __q;
};
typedef struct mcontext_t
{
__riscv_mc_gp_state __gregs;
union __riscv_mc_fp_state __fpregs;
} 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;
/* There's some padding here to allow sigset_t to be expanded in the
future. Though this is unlikely, other architectures put uc_sigmask
at the end of this structure and explicitly state it can be
expanded, so we didn't want to box ourselves in here. */
char __glibc_reserved[1024 / 8 - sizeof (sigset_t)];
/* We can't put uc_sigmask at the end of this structure because we need
to be able to expand sigcontext in the future. For example, the
vector ISA extension will almost certainly add ISA state. We want
to ensure all user-visible ISA state can be saved and restored via a
ucontext, so we're putting this at the end in order to allow for
infinite extensibility. Since we know this will be extended and we
assume sigset_t won't be extended an extreme amount, we're
prioritizing this. */
mcontext_t uc_mcontext;
} ucontext_t;
#endif /* sys/ucontext.h */

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/* Copyright (C) 2001-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_USER_H
#define _SYS_USER_H 1
#endif /* _SYS_USER_H */

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/* Macros for ucontext routines.
Copyright (C) 2017-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef _LINUX_RISCV_UCONTEXT_MACROS_H
#define _LINUX_RISCV_UCONTEXT_MACROS_H
#include <sysdep.h>
#include <sys/asm.h>
#include "ucontext_i.h"
#define MCONTEXT_FSR (32 * SZFREG + MCONTEXT_FPREGS)
#define SAVE_FP_REG(name, num, base) \
FREG_S name, ((num) * SZFREG + MCONTEXT_FPREGS)(base)
#define RESTORE_FP_REG(name, num, base) \
FREG_L name, ((num) * SZFREG + MCONTEXT_FPREGS)(base)
#define RESTORE_FP_REG_CFI(name, num, base) \
RESTORE_FP_REG (name, num, base); \
cfi_offset (name, (num) * SZFREG + MCONTEXT_FPREGS)
#define SAVE_INT_REG(name, num, base) \
REG_S name, ((num) * SZREG + MCONTEXT_GREGS)(base)
#define RESTORE_INT_REG(name, num, base) \
REG_L name, ((num) * SZREG + MCONTEXT_GREGS)(base)
#define RESTORE_INT_REG_CFI(name, num, base) \
RESTORE_INT_REG (name, num, base); \
cfi_offset (name, (num) * SZREG + MCONTEXT_GREGS)
#endif /* _LINUX_RISCV_UCONTEXT_MACROS_H */

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#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_GREGS mcontext (__gregs)
MCONTEXT_FPREGS mcontext (__fpregs)
UCONTEXT_SIZE sizeof (ucontext_t)