include/bits/link.h

   1 /* Copyright (C) 2004-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _LINK_H
  19 # error "Never include <bits/link.h> directly; use <link.h> instead."
  20 #endif
  21
  22
  23 #ifndef __x86_64__
  24 /* Registers for entry into PLT on IA-32.  */
  25 typedef struct La_i86_regs
  26 {
  27   uint32_t lr_edx;
  28   uint32_t lr_ecx;
  29   uint32_t lr_eax;
  30   uint32_t lr_ebp;
  31   uint32_t lr_esp;
  32 } La_i86_regs;
  33
  34 /* Return values for calls from PLT on IA-32.  */
  35 typedef struct La_i86_retval
  36 {
  37   uint32_t lrv_eax;
  38   uint32_t lrv_edx;
  39   long double lrv_st0;
  40   long double lrv_st1;
  41   uint64_t lrv_bnd0;
  42   uint64_t lrv_bnd1;
  43 } La_i86_retval;
  44
  45
  46 __BEGIN_DECLS
  47
  48 extern Elf32_Addr la_i86_gnu_pltenter (Elf32_Sym *__sym, unsigned int __ndx,
  49                                        uintptr_t *__refcook,
  50                                        uintptr_t *__defcook,
  51                                        La_i86_regs *__regs,
  52                                        unsigned int *__flags,
  53                                        const char *__symname,
  54                                        long int *__framesizep);
  55 extern unsigned int la_i86_gnu_pltexit (Elf32_Sym *__sym, unsigned int __ndx,
  56                                         uintptr_t *__refcook,
  57                                         uintptr_t *__defcook,
  58                                         const La_i86_regs *__inregs,
  59                                         La_i86_retval *__outregs,
  60                                         const char *symname);
  61
  62 __END_DECLS
  63
  64 #else
  65
  66 /* Registers for entry into PLT on x86-64.  */
  67 # if __GNUC_PREREQ (4,0)
  68 typedef float La_x86_64_xmm __attribute__ ((__vector_size__ (16)));
  69 typedef float La_x86_64_ymm
  70     __attribute__ ((__vector_size__ (32), __aligned__ (16)));
  71 typedef double La_x86_64_zmm
  72     __attribute__ ((__vector_size__ (64), __aligned__ (16)));
  73 # else
  74 typedef float La_x86_64_xmm __attribute__ ((__mode__ (__V4SF__)));
  75 # endif
  76
  77 typedef union
  78 {
  79 # if __GNUC_PREREQ (4,0)
  80   La_x86_64_ymm ymm[2];
  81   La_x86_64_zmm zmm[1];
  82 # endif
  83   La_x86_64_xmm xmm[4];
  84 } La_x86_64_vector __attribute__ ((__aligned__ (16)));
  85
  86 typedef struct La_x86_64_regs
  87 {
  88   uint64_t lr_rdx;
  89   uint64_t lr_r8;
  90   uint64_t lr_r9;
  91   uint64_t lr_rcx;
  92   uint64_t lr_rsi;
  93   uint64_t lr_rdi;
  94   uint64_t lr_rbp;
  95   uint64_t lr_rsp;
  96   La_x86_64_xmm lr_xmm[8];
  97   La_x86_64_vector lr_vector[8];
  98 #ifndef __ILP32__
  99   __int128_t lr_bnd[4];
 100 #endif
 101 } La_x86_64_regs;
 102
 103 /* Return values for calls from PLT on x86-64.  */
 104 typedef struct La_x86_64_retval
 105 {
 106   uint64_t lrv_rax;
 107   uint64_t lrv_rdx;
 108   La_x86_64_xmm lrv_xmm0;
 109   La_x86_64_xmm lrv_xmm1;
 110   long double lrv_st0;
 111   long double lrv_st1;
 112   La_x86_64_vector lrv_vector0;
 113   La_x86_64_vector lrv_vector1;
 114 #ifndef __ILP32__
 115   __int128_t lrv_bnd0;
 116   __int128_t lrv_bnd1;
 117 #endif
 118 } La_x86_64_retval;
 119
 120 #define La_x32_regs La_x86_64_regs
 121 #define La_x32_retval La_x86_64_retval
 122
 123 __BEGIN_DECLS
 124
 125 extern Elf64_Addr la_x86_64_gnu_pltenter (Elf64_Sym *__sym,
 126                                           unsigned int __ndx,
 127                                           uintptr_t *__refcook,
 128                                           uintptr_t *__defcook,
 129                                           La_x86_64_regs *__regs,
 130                                           unsigned int *__flags,
 131                                           const char *__symname,
 132                                           long int *__framesizep);
 133 extern unsigned int la_x86_64_gnu_pltexit (Elf64_Sym *__sym,
 134                                            unsigned int __ndx,
 135                                            uintptr_t *__refcook,
 136                                            uintptr_t *__defcook,
 137                                            const La_x86_64_regs *__inregs,
 138                                            La_x86_64_retval *__outregs,
 139                                            const char *__symname);
 140
 141 extern Elf32_Addr la_x32_gnu_pltenter (Elf32_Sym *__sym,
 142                                        unsigned int __ndx,
 143                                        uintptr_t *__refcook,
 144                                        uintptr_t *__defcook,
 145                                        La_x32_regs *__regs,
 146                                        unsigned int *__flags,
 147                                        const char *__symname,
 148                                        long int *__framesizep);
 149 extern unsigned int la_x32_gnu_pltexit (Elf32_Sym *__sym,
 150                                         unsigned int __ndx,
 151                                         uintptr_t *__refcook,
 152                                         uintptr_t *__defcook,
 153                                         const La_x32_regs *__inregs,
 154                                         La_x32_retval *__outregs,
 155                                         const char *__symname);
 156
 157 __END_DECLS
 158
 159 #endif