LoongArch: Linux ABI

3 files changed, 116 insertions, 0 deletions

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 */
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)
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