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Diffstat (limited to 'sysdeps/unix/alpha/sysdep.h')
| -rw-r--r-- | sysdeps/unix/alpha/sysdep.h | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/sysdeps/unix/alpha/sysdep.h b/sysdeps/unix/alpha/sysdep.h new file mode 100644 index 0000000000..7425026241 --- /dev/null +++ b/sysdeps/unix/alpha/sysdep.h @@ -0,0 +1,385 @@ +/* Copyright (C) 1992-2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Brendan Kehoe (brendan@zen.org). + + 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/>. */ + +#include <sysdeps/unix/sysdep.h> + +#ifdef __ASSEMBLER__ + +#ifdef __linux__ +# include <alpha/regdef.h> +#else +# include <regdef.h> +#endif + +#ifdef IS_IN_rtld +# include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */ +#endif + + +#define __LABEL(x) x##: + +#define LEAF(name, framesize) \ + .globl name; \ + .align 4; \ + .ent name, 0; \ + __LABEL(name) \ + .frame sp, framesize, ra + +#define ENTRY(name) \ + .globl name; \ + .align 4; \ + .ent name, 0; \ + __LABEL(name) \ + .frame sp, 0, ra + +/* Mark the end of function SYM. */ +#undef END +#define END(sym) .end sym + +#ifdef PROF +# define PSEUDO_PROF \ + .set noat; \ + lda AT, _mcount; \ + jsr AT, (AT), _mcount; \ + .set at +#else +# define PSEUDO_PROF +#endif + +#ifdef PROF +# define PSEUDO_PROLOGUE \ + .frame sp, 0, ra; \ + ldgp gp,0(pv); \ + PSEUDO_PROF; \ + .prologue 1 +#elif defined PIC +# define PSEUDO_PROLOGUE \ + .frame sp, 0, ra; \ + .prologue 0 +#else +# define PSEUDO_PROLOGUE \ + .frame sp, 0, ra; \ + ldgp gp,0(pv); \ + .prologue 1 +#endif /* PROF */ + +#ifdef PROF +# define USEPV_PROF std +#else +# define USEPV_PROF no +#endif + +#if RTLD_PRIVATE_ERRNO +# define SYSCALL_ERROR_LABEL $syscall_error +# define SYSCALL_ERROR_HANDLER \ +$syscall_error: \ + stl v0, rtld_errno(gp) !gprel; \ + lda v0, -1; \ + ret +# define SYSCALL_ERROR_FALLTHRU +#elif defined(PIC) +# define SYSCALL_ERROR_LABEL __syscall_error !samegp +# define SYSCALL_ERROR_HANDLER +# define SYSCALL_ERROR_FALLTHRU br SYSCALL_ERROR_LABEL +#else +# define SYSCALL_ERROR_LABEL $syscall_error +# define SYSCALL_ERROR_HANDLER \ +$syscall_error: \ + jmp $31, __syscall_error +# define SYSCALL_ERROR_FALLTHRU +#endif /* RTLD_PRIVATE_ERRNO */ + +/* Overridden by specific syscalls. */ +#undef PSEUDO_PREPARE_ARGS +#define PSEUDO_PREPARE_ARGS /* Nothing. */ + +#define PSEUDO(name, syscall_name, args) \ + .globl name; \ + .align 4; \ + .ent name,0; \ +__LABEL(name) \ + PSEUDO_PROLOGUE; \ + PSEUDO_PREPARE_ARGS \ + lda v0, SYS_ify(syscall_name); \ + call_pal PAL_callsys; \ + bne a3, SYSCALL_ERROR_LABEL + +#undef PSEUDO_END +#define PSEUDO_END(sym) \ + SYSCALL_ERROR_HANDLER; \ + END(sym) + +#define PSEUDO_NOERRNO(name, syscall_name, args) \ + .globl name; \ + .align 4; \ + .ent name,0; \ +__LABEL(name) \ + PSEUDO_PROLOGUE; \ + PSEUDO_PREPARE_ARGS \ + lda v0, SYS_ify(syscall_name); \ + call_pal PAL_callsys; + +#undef PSEUDO_END_NOERRNO +#define PSEUDO_END_NOERRNO(sym) END(sym) + +#define ret_NOERRNO ret + +#define PSEUDO_ERRVAL(name, syscall_name, args) \ + .globl name; \ + .align 4; \ + .ent name,0; \ +__LABEL(name) \ + PSEUDO_PROLOGUE; \ + PSEUDO_PREPARE_ARGS \ + lda v0, SYS_ify(syscall_name); \ + call_pal PAL_callsys; + +#undef PSEUDO_END_ERRVAL +#define PSEUDO_END_ERRVAL(sym) END(sym) + +#define ret_ERRVAL ret + +#define r0 v0 +#define r1 a4 + +#define MOVE(x,y) mov x,y + +#else /* !ASSEMBLER */ + +/* In order to get __set_errno() definition in INLINE_SYSCALL. */ +#include <errno.h> + +/* ??? Linux needs to be able to override INLINE_SYSCALL for one + particular special case. Make this easy. */ + +#undef INLINE_SYSCALL +#define INLINE_SYSCALL(name, nr, args...) \ + INLINE_SYSCALL1(name, nr, args) + +#define INLINE_SYSCALL1(name, nr, args...) \ +({ \ + long _sc_ret, _sc_err; \ + inline_syscall##nr(__NR_##name, args); \ + if (__builtin_expect (_sc_err, 0)) \ + { \ + __set_errno (_sc_ret); \ + _sc_ret = -1L; \ + } \ + _sc_ret; \ +}) + +#define INTERNAL_SYSCALL(name, err_out, nr, args...) \ + INTERNAL_SYSCALL1(name, err_out, nr, args) + +#define INTERNAL_SYSCALL1(name, err_out, nr, args...) \ + INTERNAL_SYSCALL_NCS(__NR_##name, err_out, nr, args) + +#define INTERNAL_SYSCALL_NCS(name, err_out, nr, args...) \ +({ \ + long _sc_ret, _sc_err; \ + inline_syscall##nr(name, args); \ + err_out = _sc_err; \ + _sc_ret; \ +}) + +#define INTERNAL_SYSCALL_DECL(err) \ + long int err __attribute__((unused)) + +/* The normal Alpha calling convention sign-extends 32-bit quantties + no matter what the "real" sign of the 32-bit type. We want to + preserve that when filling in values for the kernel. */ +#define syscall_promote(arg) \ + (sizeof(arg) == 4 ? (long)(int)(long)(arg) : (long)(arg)) + +/* Make sure and "use" the variable that we're not returning, + in order to suppress unused variable warnings. */ +#define INTERNAL_SYSCALL_ERROR_P(val, err) ((void)val, err) +#define INTERNAL_SYSCALL_ERRNO(val, err) ((void)err, val) + +#define inline_syscall_clobbers \ + "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", \ + "$22", "$23", "$24", "$25", "$27", "$28", "memory" + +/* It is moderately important optimization-wise to limit the lifetime + of the hard-register variables as much as possible. Thus we copy + in/out as close to the asm as possible. */ + +#define inline_syscall0(name, args...) \ +{ \ + register long _sc_19 __asm__("$19"); \ + register long _sc_0 = name; \ + __asm__ __volatile__ \ + ("callsys # %0 %1 <= %2" \ + : "+v"(_sc_0), "=r"(_sc_19) \ + : : inline_syscall_clobbers, \ + "$16", "$17", "$18", "$20", "$21"); \ + _sc_ret = _sc_0, _sc_err = _sc_19; \ +} + +#define inline_syscall1(name,arg1) \ +{ \ + register long _tmp_16 = syscall_promote (arg1); \ + register long _sc_0 = name; \ + register long _sc_16 __asm__("$16") = _tmp_16; \ + register long _sc_19 __asm__("$19"); \ + __asm__ __volatile__ \ + ("callsys # %0 %1 <= %2 %3" \ + : "+v"(_sc_0), "=r"(_sc_19), "+r"(_sc_16) \ + : : inline_syscall_clobbers, \ + "$17", "$18", "$20", "$21"); \ + _sc_ret = _sc_0, _sc_err = _sc_19; \ +} + +#define inline_syscall2(name,arg1,arg2) \ +{ \ + register long _tmp_16 = syscall_promote (arg1); \ + register long _tmp_17 = syscall_promote (arg2); \ + register long _sc_0 = name; \ + register long _sc_16 __asm__("$16") = _tmp_16; \ + register long _sc_17 __asm__("$17") = _tmp_17; \ + register long _sc_19 __asm__("$19"); \ + __asm__ __volatile__ \ + ("callsys # %0 %1 <= %2 %3 %4" \ + : "+v"(_sc_0), "=r"(_sc_19), \ + "+r"(_sc_16), "+r"(_sc_17) \ + : : inline_syscall_clobbers, \ + "$18", "$20", "$21"); \ + _sc_ret = _sc_0, _sc_err = _sc_19; \ +} + +#define inline_syscall3(name,arg1,arg2,arg3) \ +{ \ + register long _tmp_16 = syscall_promote (arg1); \ + register long _tmp_17 = syscall_promote (arg2); \ + register long _tmp_18 = syscall_promote (arg3); \ + register long _sc_0 = name; \ + register long _sc_16 __asm__("$16") = _tmp_16; \ + register long _sc_17 __asm__("$17") = _tmp_17; \ + register long _sc_18 __asm__("$18") = _tmp_18; \ + register long _sc_19 __asm__("$19"); \ + __asm__ __volatile__ \ + ("callsys # %0 %1 <= %2 %3 %4 %5" \ + : "+v"(_sc_0), "=r"(_sc_19), "+r"(_sc_16), \ + "+r"(_sc_17), "+r"(_sc_18) \ + : : inline_syscall_clobbers, "$20", "$21"); \ + _sc_ret = _sc_0, _sc_err = _sc_19; \ +} + +#define inline_syscall4(name,arg1,arg2,arg3,arg4) \ +{ \ + register long _tmp_16 = syscall_promote (arg1); \ + register long _tmp_17 = syscall_promote (arg2); \ + register long _tmp_18 = syscall_promote (arg3); \ + register long _tmp_19 = syscall_promote (arg4); \ + register long _sc_0 = name; \ + register long _sc_16 __asm__("$16") = _tmp_16; \ + register long _sc_17 __asm__("$17") = _tmp_17; \ + register long _sc_18 __asm__("$18") = _tmp_18; \ + register long _sc_19 __asm__("$19") = _tmp_19; \ + __asm__ __volatile__ \ + ("callsys # %0 %1 <= %2 %3 %4 %5 %6" \ + : "+v"(_sc_0), "+r"(_sc_19), "+r"(_sc_16), \ + "+r"(_sc_17), "+r"(_sc_18) \ + : : inline_syscall_clobbers, "$20", "$21"); \ + _sc_ret = _sc_0, _sc_err = _sc_19; \ +} + +#define inline_syscall5(name,arg1,arg2,arg3,arg4,arg5) \ +{ \ + register long _tmp_16 = syscall_promote (arg1); \ + register long _tmp_17 = syscall_promote (arg2); \ + register long _tmp_18 = syscall_promote (arg3); \ + register long _tmp_19 = syscall_promote (arg4); \ + register long _tmp_20 = syscall_promote (arg5); \ + register long _sc_0 = name; \ + register long _sc_16 __asm__("$16") = _tmp_16; \ + register long _sc_17 __asm__("$17") = _tmp_17; \ + register long _sc_18 __asm__("$18") = _tmp_18; \ + register long _sc_19 __asm__("$19") = _tmp_19; \ + register long _sc_20 __asm__("$20") = _tmp_20; \ + __asm__ __volatile__ \ + ("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7" \ + : "+v"(_sc_0), "+r"(_sc_19), "+r"(_sc_16), \ + "+r"(_sc_17), "+r"(_sc_18), "+r"(_sc_20) \ + : : inline_syscall_clobbers, "$21"); \ + _sc_ret = _sc_0, _sc_err = _sc_19; \ +} + +#define inline_syscall6(name,arg1,arg2,arg3,arg4,arg5,arg6) \ +{ \ + register long _tmp_16 = syscall_promote (arg1); \ + register long _tmp_17 = syscall_promote (arg2); \ + register long _tmp_18 = syscall_promote (arg3); \ + register long _tmp_19 = syscall_promote (arg4); \ + register long _tmp_20 = syscall_promote (arg5); \ + register long _tmp_21 = syscall_promote (arg6); \ + register long _sc_0 = name; \ + register long _sc_16 __asm__("$16") = _tmp_16; \ + register long _sc_17 __asm__("$17") = _tmp_17; \ + register long _sc_18 __asm__("$18") = _tmp_18; \ + register long _sc_19 __asm__("$19") = _tmp_19; \ + register long _sc_20 __asm__("$20") = _tmp_20; \ + register long _sc_21 __asm__("$21") = _tmp_21; \ + __asm__ __volatile__ \ + ("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7 %8" \ + : "+v"(_sc_0), "+r"(_sc_19), "+r"(_sc_16), \ + "+r"(_sc_17), "+r"(_sc_18), "+r"(_sc_20), \ + "+r"(_sc_21) \ + : : inline_syscall_clobbers); \ + _sc_ret = _sc_0, _sc_err = _sc_19; \ +} +#endif /* ASSEMBLER */ + +/* Pointer mangling support. Note that tls access is slow enough that + we don't deoptimize things by placing the pointer check value there. */ + +#ifdef __ASSEMBLER__ +# if defined NOT_IN_libc && defined IS_IN_rtld +# define PTR_MANGLE(dst, src, tmp) \ + ldah tmp, __pointer_chk_guard_local($29) !gprelhigh; \ + ldq tmp, __pointer_chk_guard_local(tmp) !gprellow; \ + xor src, tmp, dst +# define PTR_MANGLE2(dst, src, tmp) \ + xor src, tmp, dst +# elif defined SHARED +# define PTR_MANGLE(dst, src, tmp) \ + ldq tmp, __pointer_chk_guard; \ + xor src, tmp, dst +# else +# define PTR_MANGLE(dst, src, tmp) \ + ldq tmp, __pointer_chk_guard_local; \ + xor src, tmp, dst +# endif +# define PTR_MANGLE2(dst, src, tmp) \ + xor src, tmp, dst +# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp) +# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp) +#else +# include <stdint.h> +# if (defined NOT_IN_libc && defined IS_IN_rtld) \ + || (!defined SHARED && (!defined NOT_IN_libc || defined IS_IN_libpthread)) +extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden; +# define PTR_MANGLE(var) \ + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local) +# else +extern const uintptr_t __pointer_chk_guard attribute_relro; +# define PTR_MANGLE(var) \ + (var) = (__typeof(var)) ((uintptr_t) (var) ^ __pointer_chk_guard) +# endif +# define PTR_DEMANGLE(var) PTR_MANGLE(var) +#endif /* ASSEMBLER */ |