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Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h b/REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h new file mode 100644 index 0000000000..cc8f931626 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h @@ -0,0 +1,239 @@ +/* Copyright (C) 1992-2017 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/>. */ + +/* Alan Modra <amodra@bigpond.net.au> rewrote the INLINE_SYSCALL macro */ + +#ifndef _LINUX_POWERPC_SYSDEP_H +#define _LINUX_POWERPC_SYSDEP_H 1 + +#include <sysdeps/unix/sysv/linux/sysdep.h> +#include <sysdeps/unix/powerpc/sysdep.h> +#include <tls.h> + +/* Define __set_errno() for INLINE_SYSCALL macro below. */ +#ifndef __ASSEMBLER__ +#include <errno.h> +#endif + +/* 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__ + +/* This seems to always be the case on PPC. */ +# define ALIGNARG(log2) log2 +# define ASM_SIZE_DIRECTIVE(name) .size name,.-name + +#endif /* __ASSEMBLER__ */ + +/* This version is for internal uses when there is no desire + to set errno */ +#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, type, nr, args...) \ + ({ \ + type sc_ret = ENOSYS; \ + \ + __typeof (__vdso_##name) vdsop = __vdso_##name; \ + PTR_DEMANGLE (vdsop); \ + if (vdsop != NULL) \ + sc_ret = \ + INTERNAL_VSYSCALL_CALL_TYPE (vdsop, err, type, nr, ##args); \ + else \ + err = 1 << 28; \ + sc_ret; \ + }) + +/* List of system calls which are supported as vsyscalls. */ +#define HAVE_CLOCK_GETRES_VSYSCALL 1 +#define HAVE_CLOCK_GETTIME_VSYSCALL 1 +#define HAVE_GETCPU_VSYSCALL 1 + +/* Define a macro which expands inline into the wrapper code for a system + call. This use is for internal calls that do not need to handle errors + normally. It will never touch errno. This returns just what the kernel + gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set) + the negation of the return value in the kernel gets reverted. */ + +#define INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, type, nr, args...) \ + ({ \ + register void *r0 __asm__ ("r0"); \ + register long int r3 __asm__ ("r3"); \ + register long int r4 __asm__ ("r4"); \ + register long int r5 __asm__ ("r5"); \ + register long int r6 __asm__ ("r6"); \ + register long int r7 __asm__ ("r7"); \ + register long int r8 __asm__ ("r8"); \ + register type rval __asm__ ("r3"); \ + LOADARGS_##nr (funcptr, args); \ + __asm__ __volatile__ \ + ("mtctr %0\n\t" \ + "bctrl\n\t" \ + "mfcr %0\n\t" \ + "0:" \ + : "+r" (r0), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), \ + "+r" (r7), "+r" (r8) \ + : : "r9", "r10", "r11", "r12", "cr0", "ctr", "lr", "memory"); \ + err = (long int) r0; \ + __asm__ __volatile__ ("" : "=r" (rval) : "r" (r3)); \ + rval; \ + }) + +#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \ + INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, long int, nr, args) + +#undef INLINE_SYSCALL + +/* This version is for kernels that implement system calls that + behave like function calls as far as register saving. */ +#define INLINE_SYSCALL(name, nr, args...) \ + ({ \ + INTERNAL_SYSCALL_DECL (sc_err); \ + long int sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, args); \ + if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \ + { \ + __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \ + sc_ret = -1L; \ + } \ + sc_ret; \ + }) + +/* Define a macro which expands inline into the wrapper code for a system + call. This use is for internal calls that do not need to handle errors + normally. It will never touch errno. This returns just what the kernel + gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set) + the negation of the return value in the kernel gets reverted. */ + +#undef INTERNAL_SYSCALL +#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ + ({ \ + register long int r0 __asm__ ("r0"); \ + register long int r3 __asm__ ("r3"); \ + register long int r4 __asm__ ("r4"); \ + register long int r5 __asm__ ("r5"); \ + register long int r6 __asm__ ("r6"); \ + register long int r7 __asm__ ("r7"); \ + register long int r8 __asm__ ("r8"); \ + LOADARGS_##nr (name, ##args); \ + ABORT_TRANSACTION; \ + __asm__ __volatile__ \ + ("sc\n\t" \ + "mfcr %0\n\t" \ + "0:" \ + : "=&r" (r0), \ + "=&r" (r3), "=&r" (r4), "=&r" (r5), \ + "=&r" (r6), "=&r" (r7), "=&r" (r8) \ + : ASM_INPUT_##nr \ + : "r9", "r10", "r11", "r12", \ + "cr0", "ctr", "memory"); \ + err = r0; \ + r3; \ + }) +#define INTERNAL_SYSCALL(name, err, nr, args...) \ + INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, args) + +#undef INTERNAL_SYSCALL_DECL +#define INTERNAL_SYSCALL_DECL(err) long int err __attribute__ ((unused)) + +#undef INTERNAL_SYSCALL_ERROR_P +#define INTERNAL_SYSCALL_ERROR_P(val, err) \ + ((void) (val), __builtin_expect ((err) & (1 << 28), 0)) + +#undef INTERNAL_SYSCALL_ERRNO +#define INTERNAL_SYSCALL_ERRNO(val, err) (val) + +#define LOADARGS_0(name, dummy) \ + r0 = name +#define LOADARGS_1(name, __arg1) \ + long int arg1 = (long int) (__arg1); \ + LOADARGS_0(name, 0); \ + extern void __illegally_sized_syscall_arg1 (void); \ + if (__builtin_classify_type (__arg1) != 5 && sizeof (__arg1) > 8) \ + __illegally_sized_syscall_arg1 (); \ + r3 = arg1 +#define LOADARGS_2(name, __arg1, __arg2) \ + long int arg2 = (long int) (__arg2); \ + LOADARGS_1(name, __arg1); \ + extern void __illegally_sized_syscall_arg2 (void); \ + if (__builtin_classify_type (__arg2) != 5 && sizeof (__arg2) > 8) \ + __illegally_sized_syscall_arg2 (); \ + r4 = arg2 +#define LOADARGS_3(name, __arg1, __arg2, __arg3) \ + long int arg3 = (long int) (__arg3); \ + LOADARGS_2(name, __arg1, __arg2); \ + extern void __illegally_sized_syscall_arg3 (void); \ + if (__builtin_classify_type (__arg3) != 5 && sizeof (__arg3) > 8) \ + __illegally_sized_syscall_arg3 (); \ + r5 = arg3 +#define LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4) \ + long int arg4 = (long int) (__arg4); \ + LOADARGS_3(name, __arg1, __arg2, __arg3); \ + extern void __illegally_sized_syscall_arg4 (void); \ + if (__builtin_classify_type (__arg4) != 5 && sizeof (__arg4) > 8) \ + __illegally_sized_syscall_arg4 (); \ + r6 = arg4 +#define LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5) \ + long int arg5 = (long int) (__arg5); \ + LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4); \ + extern void __illegally_sized_syscall_arg5 (void); \ + if (__builtin_classify_type (__arg5) != 5 && sizeof (__arg5) > 8) \ + __illegally_sized_syscall_arg5 (); \ + r7 = arg5 +#define LOADARGS_6(name, __arg1, __arg2, __arg3, __arg4, __arg5, __arg6) \ + long int arg6 = (long int) (__arg6); \ + LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5); \ + extern void __illegally_sized_syscall_arg6 (void); \ + if (__builtin_classify_type (__arg6) != 5 && sizeof (__arg6) > 8) \ + __illegally_sized_syscall_arg6 (); \ + r8 = arg6 + +#define ASM_INPUT_0 "0" (r0) +#define ASM_INPUT_1 ASM_INPUT_0, "1" (r3) +#define ASM_INPUT_2 ASM_INPUT_1, "2" (r4) +#define ASM_INPUT_3 ASM_INPUT_2, "3" (r5) +#define ASM_INPUT_4 ASM_INPUT_3, "4" (r6) +#define ASM_INPUT_5 ASM_INPUT_4, "5" (r7) +#define ASM_INPUT_6 ASM_INPUT_5, "6" (r8) + + +/* 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. */ +#else +# ifdef __ASSEMBLER__ +# define PTR_MANGLE(reg, tmpreg) \ + ld tmpreg,POINTER_GUARD(r13); \ + xor reg,tmpreg,reg +# define PTR_MANGLE2(reg, tmpreg) \ + xor reg,tmpreg,reg +# define PTR_MANGLE3(destreg, reg, tmpreg) \ + ld tmpreg,POINTER_GUARD(r13); \ + xor destreg,tmpreg,reg +# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg) +# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg) +# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg) +# else +# define PTR_MANGLE(var) \ + (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ()) +# define PTR_DEMANGLE(var) PTR_MANGLE (var) +# endif +#endif + +#endif /* linux/powerpc/powerpc64/sysdep.h */ |