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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
24 changed files with 1445 additions and 0 deletions
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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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sysdeps/unix/sysv/linux/riscv/sys/procfs.h Normal file
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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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sysdeps/unix/sysv/linux/riscv/sys/ucontext.h Normal file
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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 */