| /* Copyright (C) 1992-2018 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> |
| #include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */ |
| |
| #ifdef __ASSEMBLER__ |
| |
| #ifdef __linux__ |
| # include <alpha/regdef.h> |
| #else |
| # include <regdef.h> |
| #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 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 (IS_IN (rtld) \ |
| || (!defined SHARED && (IS_IN (libc) \ |
| || 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 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 */ |