-/* Copyright (C) 1992, 93, 95-99, 2000 Free Software Foundation,
- Inc.
+/* Copyright (C) 1992-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
Changed by Kaz Kojima, <kkojima@rr.iij4u.or.jp>.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ 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_SH_SYSDEP_H
#define _LINUX_SH_SYSDEP_H 1
/* There is some commonality. */
+#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/sh/sysdep.h>
+#include <tls.h>
/* For Linux we can use the system call table in the header file
/usr/include/asm/unistd.h
returns a value in -1 .. -4095 as a valid result so we can savely
test with -4095. */
+#define _IMM1 #-1
#define _IMM12 #-12
#undef PSEUDO
-#ifdef SHARED
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name); \
- DO_CALL (args, syscall_name); \
+ DO_CALL (syscall_name, args); \
mov r0,r1; \
mov _IMM12,r2; \
shad r2,r1; \
not r1,r1; \
tst r1,r1; \
- bf 1f; \
- mov r0,r4; \
- mov.l r12,@-r15; \
- sts.l pr,@-r15; \
- mov.l 0f,r12; \
- mova 0f,r0; \
- add r0,r12; \
- mov.l 2f,r1; \
- mova 2f,r0; \
- add r0,r1; \
- jsr @r1; \
- nop; \
- lds.l @r15+,pr; \
- rts; \
- mov.l @r15+,r12; \
- .align 2; \
- 2: .long PLTJMP(C_SYMBOL_NAME(__syscall_error)); \
- 0: .long _GLOBAL_OFFSET_TABLE_; \
- 1:
-#else
-#define PSEUDO(name, syscall_name, args) \
- .text; \
- ENTRY (name); \
- DO_CALL (args, syscall_name); \
- mov r0,r1; \
- mov _IMM12,r2; \
- shad r2,r1; \
- not r1,r1; \
- tst r1,r1; \
- bf 1f; \
- mov.l 2f,r1; \
- jmp @r1; \
- mov r0, r4; \
- .align 2; \
- 2: .long PLTJMP(C_SYMBOL_NAME(__syscall_error)); \
- 1:
-#endif
+ bf .Lpseudo_end; \
+ SYSCALL_ERROR_HANDLER; \
+ .Lpseudo_end:
#undef PSEUDO_END
#define PSEUDO_END(name) \
- SYSCALL_ERROR_HANDLER \
END (name)
-#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
+#undef PSEUDO_NOERRNO
+#define PSEUDO_NOERRNO(name, syscall_name, args) \
+ .text; \
+ ENTRY (name); \
+ DO_CALL (syscall_name, args)
+
+#undef PSEUDO_END_NOERRNO
+#define PSEUDO_END_NOERRNO(name) \
+ END (name)
+
+#define ret_NOERRNO ret
+
+#define PSEUDO_ERRVAL(name, syscall_name, args) \
+ .text; \
+ ENTRY (name); \
+ DO_CALL (syscall_name, args);
+
+#undef PSEUDO_END_ERRVAL
+#define PSEUDO_END_ERRVAL(name) \
+ END (name)
+
+#define ret_ERRVAL ret
+
+#ifndef PIC
+# define SYSCALL_ERROR_HANDLER \
+ mov.l 0f,r1; \
+ jmp @r1; \
+ mov r0,r4; \
+ .align 2; \
+ 0: .long __syscall_error
+#else
+# if RTLD_PRIVATE_ERRNO
+# define SYSCALL_ERROR_HANDLER \
+ neg r0,r1; \
+ mov r12,r2; \
+ cfi_register (r12, r2); \
+ mov.l 0f,r12; \
+ mova 0f,r0; \
+ add r0,r12; \
+ mov.l 1f,r0; \
+ mov.l r1,@(r0,r12); \
+ mov r2,r12; \
+ cfi_restore (r12); \
+ bra .Lpseudo_end; \
+ mov _IMM1,r0; \
+ .align 2; \
+ 0: .long _GLOBAL_OFFSET_TABLE_; \
+ 1: .long rtld_errno@GOTOFF
+
+# elif defined _LIBC_REENTRANT
-#define SYSCALL_INST0 trapa #0
-#define SYSCALL_INST1 trapa #0
-#define SYSCALL_INST2 trapa #0
-#define SYSCALL_INST3 trapa #0
-#define SYSCALL_INST4 trapa #0
-#define SYSCALL_INST5 trapa #1
-#define SYSCALL_INST6 trapa #2
+# if IS_IN (libc)
+# define SYSCALL_ERROR_ERRNO __libc_errno
+# else
+# define SYSCALL_ERROR_ERRNO errno
+# endif
+# define SYSCALL_ERROR_HANDLER \
+ neg r0,r1; \
+ mov r12,r2; \
+ cfi_register (r12, r2); \
+ mov.l 0f,r12; \
+ mova 0f,r0; \
+ add r0,r12; \
+ mov.l 1f,r0; \
+ stc gbr, r4; \
+ mov.l @(r0,r12),r0; \
+ mov r2,r12; \
+ cfi_restore (r12); \
+ add r4,r0; \
+ mov.l r1,@r0; \
+ bra .Lpseudo_end; \
+ mov _IMM1,r0; \
+ .align 2; \
+ 0: .long _GLOBAL_OFFSET_TABLE_; \
+ 1: .long SYSCALL_ERROR_ERRNO@GOTTPOFF
+# else
+/* Store (-r0) into errno through the GOT. */
+# define SYSCALL_ERROR_HANDLER \
+ neg r0,r1; \
+ mov r12,r2; \
+ cfi_register (r12, r2); \
+ mov.l 0f,r12; \
+ mova 0f,r0; \
+ add r0,r12; \
+ mov.l 1f,r0; \
+ mov.l @(r0,r12),r0; \
+ mov r2,r12; \
+ cfi_restore (r12); \
+ mov.l r1,@r0; \
+ bra .Lpseudo_end; \
+ mov _IMM1,r0; \
+ .align 2; \
+ 0: .long _GLOBAL_OFFSET_TABLE_; \
+ 1: .long errno@GOT
+# endif /* _LIBC_REENTRANT */
+#endif /* PIC */
+
+# ifdef NEED_SYSCALL_INST_PAD
+# define SYSCALL_INST_PAD \
+ or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0
+# else
+# define SYSCALL_INST_PAD
+# endif
+
+#define SYSCALL_INST0 trapa #0x10
+#define SYSCALL_INST1 trapa #0x11
+#define SYSCALL_INST2 trapa #0x12
+#define SYSCALL_INST3 trapa #0x13
+#define SYSCALL_INST4 trapa #0x14
+#define SYSCALL_INST5 mov.l @(0,r15),r0; trapa #0x15
+#define SYSCALL_INST6 mov.l @(0,r15),r0; mov.l @(4,r15),r1; trapa #0x16
#undef DO_CALL
-#define DO_CALL(args, syscall_name) \
- mov.l 1f,r0; \
- SYSCALL_INST##args; \
- bra 2f; \
- nop; \
- .align 2; \
- 1: .long SYS_ify(syscall_name); \
+#define DO_CALL(syscall_name, args) \
+ mov.l 1f,r3; \
+ SYSCALL_INST##args; \
+ SYSCALL_INST_PAD; \
+ bra 2f; \
+ nop; \
+ .align 2; \
+ 1: .long SYS_ify (syscall_name); \
2:
#else /* not __ASSEMBLER__ */
+#define SYSCALL_INST_STR0 "trapa #0x10\n\t"
+#define SYSCALL_INST_STR1 "trapa #0x11\n\t"
+#define SYSCALL_INST_STR2 "trapa #0x12\n\t"
+#define SYSCALL_INST_STR3 "trapa #0x13\n\t"
+#define SYSCALL_INST_STR4 "trapa #0x14\n\t"
+#define SYSCALL_INST_STR5 "trapa #0x15\n\t"
+#define SYSCALL_INST_STR6 "trapa #0x16\n\t"
+
+# ifdef NEED_SYSCALL_INST_PAD
+# define SYSCALL_INST_PAD "\
+ or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0"
+# else
+# define SYSCALL_INST_PAD
+# endif
+
+#define ASMFMT_0
+#define ASMFMT_1 \
+ , "r" (r4)
+#define ASMFMT_2 \
+ , "r" (r4), "r" (r5)
+#define ASMFMT_3 \
+ , "r" (r4), "r" (r5), "r" (r6)
+#define ASMFMT_4 \
+ , "r" (r4), "r" (r5), "r" (r6), "r" (r7)
+#define ASMFMT_5 \
+ , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0)
+#define ASMFMT_6 \
+ , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1)
+#define ASMFMT_7 \
+ , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1), "r" (r2)
+
+#define SUBSTITUTE_ARGS_0()
+#define SUBSTITUTE_ARGS_1(arg1) \
+ long int _arg1 = (long int) (arg1); \
+ register long int r4 asm ("%r4") = (long int) (_arg1)
+#define SUBSTITUTE_ARGS_2(arg1, arg2) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ register long int r4 asm ("%r4") = (long int) (_arg1); \
+ register long int r5 asm ("%r5") = (long int) (_arg2)
+#define SUBSTITUTE_ARGS_3(arg1, arg2, arg3) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ register long int r4 asm ("%r4") = (long int) (_arg1); \
+ register long int r5 asm ("%r5") = (long int) (_arg2); \
+ register long int r6 asm ("%r6") = (long int) (_arg3)
+#define SUBSTITUTE_ARGS_4(arg1, arg2, arg3, arg4) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ long int _arg4 = (long int) (arg4); \
+ register long int r4 asm ("%r4") = (long int) (_arg1); \
+ register long int r5 asm ("%r5") = (long int) (_arg2); \
+ register long int r6 asm ("%r6") = (long int) (_arg3); \
+ register long int r7 asm ("%r7") = (long int) (_arg4)
+#define SUBSTITUTE_ARGS_5(arg1, arg2, arg3, arg4, arg5) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ long int _arg4 = (long int) (arg4); \
+ long int _arg5 = (long int) (arg5); \
+ register long int r4 asm ("%r4") = (long int) (_arg1); \
+ register long int r5 asm ("%r5") = (long int) (_arg2); \
+ register long int r6 asm ("%r6") = (long int) (_arg3); \
+ register long int r7 asm ("%r7") = (long int) (_arg4); \
+ register long int r0 asm ("%r0") = (long int) (_arg5)
+#define SUBSTITUTE_ARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ long int _arg4 = (long int) (arg4); \
+ long int _arg5 = (long int) (arg5); \
+ long int _arg6 = (long int) (arg6); \
+ register long int r4 asm ("%r4") = (long int)(_arg1); \
+ register long int r5 asm ("%r5") = (long int) (_arg2); \
+ register long int r6 asm ("%r6") = (long int) (_arg3); \
+ register long int r7 asm ("%r7") = (long int) (_arg4); \
+ register long int r0 asm ("%r0") = (long int) (_arg5); \
+ register long int r1 asm ("%r1") = (long int) (_arg6)
+#define SUBSTITUTE_ARGS_7(arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ long int _arg4 = (long int) (arg4); \
+ long int _arg5 = (long int) (arg5); \
+ long int _arg6 = (long int) (arg6); \
+ long int _arg7 = (long int) (arg7); \
+ register long int r4 asm ("%r4") = (long int) (_arg1); \
+ register long int r5 asm ("%r5") = (long int) (_arg2); \
+ register long int r6 asm ("%r6") = (long int) (_arg3); \
+ register long int r7 asm ("%r7") = (long int) (_arg4); \
+ register long int r0 asm ("%r0") = (long int) (_arg5); \
+ register long int r1 asm ("%r1") = (long int) (_arg6); \
+ register long int r2 asm ("%r2") = (long int) (_arg7)
+
#undef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) \
- __syscall_##name(args)
+ ({ \
+ unsigned int resultvar = INTERNAL_SYSCALL (name, , nr, args); \
+ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (resultvar, ), 0)) \
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (resultvar, )); \
+ resultvar = 0xffffffff; \
+ } \
+ (int) resultvar; })
+
+#undef INTERNAL_SYSCALL
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ ({ \
+ unsigned long int resultvar; \
+ register long int r3 asm ("%r3") = SYS_ify (name); \
+ SUBSTITUTE_ARGS_##nr(args); \
+ \
+ asm volatile (SYSCALL_INST_STR##nr SYSCALL_INST_PAD \
+ : "=z" (resultvar) \
+ : "r" (r3) ASMFMT_##nr \
+ : "memory", "t"); \
+ \
+ (int) resultvar; })
+
+/* The _NCS variant allows non-constant syscall numbers. */
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+ ({ \
+ unsigned long int resultvar; \
+ register long int r3 asm ("%r3") = (name); \
+ SUBSTITUTE_ARGS_##nr(args); \
+ \
+ asm volatile (SYSCALL_INST_STR##nr SYSCALL_INST_PAD \
+ : "=z" (resultvar) \
+ : "r" (r3) ASMFMT_##nr \
+ : "memory", "t"); \
+ \
+ (int) resultvar; })
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
+ ((unsigned int) (val) >= 0xfffff001u)
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
#endif /* __ASSEMBLER__ */
+/* Pointer mangling support. */
+#if IS_IN (rtld)
+/* We cannot use the thread descriptor because in ld.so we use setjmp
+ earlier than the descriptor is initialized. Using a global variable
+ is too complicated here since we have no PC-relative addressing mode. */
+#else
+# ifdef __ASSEMBLER__
+# define PTR_MANGLE(reg, tmp) \
+ stc gbr,tmp; mov.l @(POINTER_GUARD,tmp),tmp; xor tmp,reg
+# define PTR_MANGLE2(reg, tmp) xor tmp,reg
+# define PTR_DEMANGLE(reg, tmp) PTR_MANGLE (reg, tmp)
+# define PTR_DEMANGLE2(reg, tmp) PTR_MANGLE2 (reg, tmp)
+# else
+# define PTR_MANGLE(var) \
+ (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
+# define PTR_DEMANGLE(var) PTR_MANGLE (var)
+# endif
+#endif
+
#endif /* linux/sh/sysdep.h */
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