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Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/sh/sysdep.h')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/sh/sysdep.h | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/sh/sysdep.h b/REORG.TODO/sysdeps/unix/sysv/linux/sh/sysdep.h new file mode 100644 index 0000000000..b76140cd90 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/sh/sysdep.h @@ -0,0 +1,360 @@ +/* Copyright (C) 1992-2017 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 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_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 + of the kernel. But these symbols do not follow the SYS_* syntax + so we have to redefine the `SYS_ify' macro here. */ +#undef SYS_ify +#define SYS_ify(syscall_name) (__NR_##syscall_name) + + +#ifdef __ASSEMBLER__ + +/* Linux uses a negative return value to indicate syscall errors, + unlike most Unices, which use the condition codes' carry flag. + + Since version 2.1 the return value of a system call might be + negative even if the call succeeded. E.g., the `lseek' system call + might return a large offset. Therefore we must not anymore test + for < 0, but test for a real error by making sure the value in R0 + is a real error number. Linus said he will make sure the no syscall + 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 +#define PSEUDO(name, syscall_name, args) \ + .text; \ + ENTRY (name); \ + DO_CALL (syscall_name, args); \ + mov r0,r1; \ + mov _IMM12,r2; \ + shad r2,r1; \ + not r1,r1; \ + tst r1,r1; \ + bf .Lpseudo_end; \ + SYSCALL_ERROR_HANDLER; \ + .Lpseudo_end: + +#undef PSEUDO_END +#define PSEUDO_END(name) \ + END (name) + +#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 + +# 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(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...) \ + ({ \ + 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 */ |