Add loongarch64-linux-gnusf target support

lib/libc/include/loongarch64-linux-gnusf/bits/endianness.h

@@ -0,0 +1,11 @@
+#ifndef _BITS_ENDIANNESS_H
+#define _BITS_ENDIANNESS_H 1
+
+#ifndef _BITS_ENDIAN_H
+#error "Never use <bits/endianness.h> directly; include <endian.h> instead."
+#endif
+
+/* LoongArch is little-endian.  */
+#define __BYTE_ORDER __LITTLE_ENDIAN
+
+#endif /* bits/endianness.h */

lib/libc/include/loongarch64-linux-gnusf/bits/fcntl.h

@@ -0,0 +1,61 @@
+/* O_*, F_*, FD_* bit values for the generic Linux/LoongArch ABI.
+   Copyright (C) 2022-2024 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>

lib/libc/include/loongarch64-linux-gnusf/bits/fenv.h

@@ -0,0 +1,90 @@
+/* Floating point environment.
+   Copyright (C) 2022-2024 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 _FENV_H
+#error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+/* Define bits representing the exception.  We use the bit positions
+   of the appropriate bits in the FPU control word.  */
+enum
+{
+  FE_INEXACT =
+#define FE_INEXACT 0x010000
+    FE_INEXACT,
+  FE_UNDERFLOW =
+#define FE_UNDERFLOW 0x020000
+    FE_UNDERFLOW,
+  FE_OVERFLOW =
+#define FE_OVERFLOW 0x040000
+    FE_OVERFLOW,
+  FE_DIVBYZERO =
+#define FE_DIVBYZERO 0x080000
+    FE_DIVBYZERO,
+  FE_INVALID =
+#define FE_INVALID 0x100000
+    FE_INVALID,
+};
+
+#define FE_ALL_EXCEPT \
+  (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+/* The LoongArch FPU supports all of the four defined rounding modes.  We
+   use again the bit positions in the FPU control word as the values
+   for the appropriate macros.  */
+enum
+{
+  FE_TONEAREST =
+#define FE_TONEAREST 0x000
+    FE_TONEAREST,
+  FE_TOWARDZERO =
+#define FE_TOWARDZERO 0x100
+    FE_TOWARDZERO,
+  FE_UPWARD =
+#define FE_UPWARD 0x200
+    FE_UPWARD,
+  FE_DOWNWARD =
+#define FE_DOWNWARD 0x300
+    FE_DOWNWARD
+};
+
+/* Type representing exception flags.  */
+typedef unsigned int fexcept_t;
+
+/* Type representing floating-point environment.  This function corresponds
+   to the layout of the block written by the `fstenv'.  */
+typedef struct
+{
+  unsigned int __fp_control_register;
+} fenv_t;
+
+/* If the default argument is used we use this value.  */
+#define FE_DFL_ENV ((const fenv_t *) -1)
+
+#ifdef __USE_GNU
+/* Floating-point environment where none of the exception is masked.  */
+#define FE_NOMASK_ENV ((const fenv_t *) -257)
+#endif
+
+#if __GLIBC_USE (IEC_60559_BFP_EXT_C23)
+/* Type representing floating-point control modes.  */
+typedef unsigned int femode_t;
+
+/* Default floating-point control modes.  */
+#define FE_DFL_MODE ((const femode_t *) -1L)
+#endif

lib/libc/include/loongarch64-linux-gnusf/bits/hwcap.h

@@ -0,0 +1,38 @@
+/* Defines for bits in AT_HWCAP.  LoongArch64 Linux version.
+   Copyright (C) 2022-2024 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/>.  */
+
+#if !defined (_SYS_AUXV_H)
+# error "Never include <bits/hwcap.h> directly; use <sys/auxv.h> instead."
+#endif
+
+/* The following must match the kernel's <asm/hwcap.h>.  */
+/* HWCAP flags */
+#define HWCAP_LOONGARCH_CPUCFG          (1 << 0)
+#define HWCAP_LOONGARCH_LAM             (1 << 1)
+#define HWCAP_LOONGARCH_UAL             (1 << 2)
+#define HWCAP_LOONGARCH_FPU             (1 << 3)
+#define HWCAP_LOONGARCH_LSX             (1 << 4)
+#define HWCAP_LOONGARCH_LASX            (1 << 5)
+#define HWCAP_LOONGARCH_CRC32           (1 << 6)
+#define HWCAP_LOONGARCH_COMPLEX         (1 << 7)
+#define HWCAP_LOONGARCH_CRYPTO          (1 << 8)
+#define HWCAP_LOONGARCH_LVZ             (1 << 9)
+#define HWCAP_LOONGARCH_LBT_X86         (1 << 10)
+#define HWCAP_LOONGARCH_LBT_ARM         (1 << 11)
+#define HWCAP_LOONGARCH_LBT_MIPS        (1 << 12)
+#define HWCAP_LOONGARCH_PTW             (1 << 13)

lib/libc/include/loongarch64-linux-gnusf/bits/link.h

@@ -0,0 +1,76 @@
+/* Machine-specific declarations for dynamic linker interface.
+   Copyright (C) 2022-2024 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 _LINK_H
+#error "Never include <bits/link.h> directly; use <link.h> instead."
+#endif
+
+#ifndef __loongarch_soft_float
+typedef float La_loongarch_vr
+    __attribute__ ((__vector_size__ (16), __aligned__ (16)));
+typedef float La_loongarch_xr
+    __attribute__ ((__vector_size__ (32), __aligned__ (16)));
+
+typedef union
+{
+  double fpreg[4];
+  La_loongarch_vr vr[2];
+  La_loongarch_xr xr[1];
+} La_loongarch_vector __attribute__ ((__aligned__ (16)));
+#endif
+
+typedef struct La_loongarch_regs
+{
+  unsigned long int lr_reg[8]; /* a0 - a7 */
+#ifndef __loongarch_soft_float
+  La_loongarch_vector lr_vec[8]; /* fa0 - fa7 or vr0 - vr7 or xr0 - xr7*/
+#endif
+  unsigned long int lr_ra;
+  unsigned long int lr_sp;
+} La_loongarch_regs;
+
+/* Return values for calls from PLT on LoongArch.  */
+typedef struct La_loongarch_retval
+{
+  unsigned long int lrv_a0;
+  unsigned long int lrv_a1;
+#ifndef __loongarch_soft_float
+  La_loongarch_vector lrv_vec0;
+  La_loongarch_vector lrv_vec1;
+#endif
+} La_loongarch_retval;
+
+__BEGIN_DECLS
+
+extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) *__sym,
+					      unsigned int __ndx,
+					      uintptr_t *__refcook,
+					      uintptr_t *__defcook,
+					      La_loongarch_regs *__regs,
+					      unsigned int *__flags,
+					      const char *__symname,
+					      long int *__framesizep);
+extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) *__sym,
+					      unsigned int __ndx,
+					      uintptr_t *__refcook,
+					      uintptr_t *__defcook,
+					      const La_loongarch_regs *__inregs,
+					      La_loongarch_retval *__outregs,
+					      const char *__symname);
+
+__END_DECLS

lib/libc/include/loongarch64-linux-gnusf/bits/link_lavcurrent.h

@@ -0,0 +1,25 @@
+/* Data structure for communication from the run-time dynamic linker for
+   loaded ELF shared objects.  LAV_CURRENT definition.
+   Copyright (C) 2023-2024 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 _LINK_H
+# error "Never include <bits/link_lavcurrent.h> directly; use <link.h> instead."
+#endif
+
+/* Version numbers for la_version handshake interface.  */
+#define LAV_CURRENT	3

lib/libc/include/loongarch64-linux-gnusf/bits/long-double.h

@@ -0,0 +1,21 @@
+/* Properties of long double type.  ldbl-128 version.
+   Copyright (C) 2016-2024 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  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/>.  */
+
+/* long double is distinct from double, so there is nothing to
+   define here.  */
+#define __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI 0

lib/libc/include/loongarch64-linux-gnusf/bits/procfs.h

@@ -0,0 +1,52 @@
+/* Types for registers for sys/procfs.h.
+   Copyright (C) 2022-2024 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];