libc/sysdeps/linux/common/sysdep.h

   1 /* Generic asm macros used on many machines.
   2    Copyright (C) 1991,92,93,96,98,2002,2003 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/syscall.h>
  20
  21 #ifndef C_LABEL
  22
  23 /* Define a macro we can use to construct the asm name for a C symbol.  */
  24 #ifndef __UCLIBC_UNDERSCORES__
  25 #ifdef  __STDC__
  26 #define C_LABEL(name)           name##:
  27 #else
  28 #define C_LABEL(name)           name/**/:
  29 #endif
  30 #else
  31 #ifdef  __STDC__
  32 #define C_LABEL(name)           _##name##:
  33 #else
  34 #define C_LABEL(name)           _/**/name/**/:
  35 #endif
  36 #endif
  37
  38 #endif
  39
  40 #ifdef __ASSEMBLER__
  41 /* Mark the end of function named SYM.  This is used on some platforms
  42    to generate correct debugging information.  */
  43 #ifndef END
  44 #define END(sym)
  45 #endif
  46
  47 #ifndef JUMPTARGET
  48 #define JUMPTARGET(sym)         sym
  49 #endif
  50
  51 #define ret_ERRVAL ret
  52
  53 /* Macros to generate eh_frame unwind information.  */
  54 # ifdef HAVE_ASM_CFI_DIRECTIVES
  55 #  define cfi_sections(sect...)         .cfi_sections sect
  56 #  define cfi_startproc                 .cfi_startproc
  57 #  define cfi_endproc                   .cfi_endproc
  58 #  define cfi_def_cfa(reg, off)         .cfi_def_cfa reg, off
  59 #  define cfi_def_cfa_register(reg)     .cfi_def_cfa_register reg
  60 #  define cfi_def_cfa_offset(off)       .cfi_def_cfa_offset off
  61 #  define cfi_adjust_cfa_offset(off)    .cfi_adjust_cfa_offset off
  62 #  define cfi_offset(reg, off)          .cfi_offset reg, off
  63 #  define cfi_rel_offset(reg, off)      .cfi_rel_offset reg, off
  64 #  define cfi_register(r1, r2)          .cfi_register r1, r2
  65 #  define cfi_return_column(reg)        .cfi_return_column reg
  66 #  define cfi_restore(reg)              .cfi_restore reg
  67 #  define cfi_same_value(reg)           .cfi_same_value reg
  68 #  define cfi_undefined(reg)            .cfi_undefined reg
  69 #  define cfi_remember_state            .cfi_remember_state
  70 #  define cfi_restore_state             .cfi_restore_state
  71 #  define cfi_window_save               .cfi_window_save
  72 #  define cfi_personality(enc, exp)     .cfi_personality enc, exp
  73 #  define cfi_lsda(enc, exp)            .cfi_lsda enc, exp
  74
  75 # else
  76 #  define cfi_sections(sect...)
  77 #  define cfi_startproc
  78 #  define cfi_endproc
  79 #  define cfi_def_cfa(reg, off)
  80 #  define cfi_def_cfa_register(reg)
  81 #  define cfi_def_cfa_offset(off)
  82 #  define cfi_adjust_cfa_offset(off)
  83 #  define cfi_offset(reg, off)
  84 #  define cfi_rel_offset(reg, off)
  85 #  define cfi_register(r1, r2)
  86 #  define cfi_return_column(reg)
  87 #  define cfi_restore(reg)
  88 #  define cfi_same_value(reg)
  89 #  define cfi_undefined(reg)
  90 #  define cfi_remember_state
  91 #  define cfi_restore_state
  92 #  define cfi_window_save
  93 #  define cfi_personality(enc, exp)
  94 #  define cfi_lsda(enc, exp)
  95 # endif
  96
  97 #else /* ! ASSEMBLER */
  98 # ifdef HAVE_ASM_CFI_DIRECTIVES
  99 #  define CFI_STRINGIFY(Name) CFI_STRINGIFY2 (Name)
 100 #  define CFI_STRINGIFY2(Name) #Name
 101 #  define CFI_SECTIONS(sect...) \
 102    ".cfi_sections " CFI_STRINGIFY(sect)
 103 #  define CFI_STARTPROC ".cfi_startproc"
 104 #  define CFI_ENDPROC   ".cfi_endproc"
 105 #  define CFI_DEF_CFA(reg, off) \
 106    ".cfi_def_cfa " CFI_STRINGIFY(reg) "," CFI_STRINGIFY(off)
 107 #  define CFI_DEF_CFA_REGISTER(reg) \
 108    ".cfi_def_cfa_register " CFI_STRINGIFY(reg)
 109 #  define CFI_DEF_CFA_OFFSET(off) \
 110    ".cfi_def_cfa_offset " CFI_STRINGIFY(off)
 111 #  define CFI_ADJUST_CFA_OFFSET(off) \
 112    ".cfi_adjust_cfa_offset " CFI_STRINGIFY(off)
 113 #  define CFI_OFFSET(reg, off) \
 114    ".cfi_offset " CFI_STRINGIFY(reg) "," CFI_STRINGIFY(off)
 115 #  define CFI_REL_OFFSET(reg, off) \
 116    ".cfi_rel_offset " CFI_STRINGIFY(reg) "," CFI_STRINGIFY(off)
 117 #  define CFI_REGISTER(r1, r2) \
 118    ".cfi_register " CFI_STRINGIFY(r1) "," CFI_STRINGIFY(r2)
 119 #  define CFI_RETURN_COLUMN(reg) \
 120    ".cfi_return_column " CFI_STRINGIFY(reg)
 121 #  define CFI_RESTORE(reg) \
 122    ".cfi_restore " CFI_STRINGIFY(reg)
 123 #  define CFI_UNDEFINED(reg) \
 124    ".cfi_undefined " CFI_STRINGIFY(reg)
 125 #  define CFI_REMEMBER_STATE \
 126    ".cfi_remember_state"
 127 #  define CFI_RESTORE_STATE \
 128    ".cfi_restore_state"
 129 #  define CFI_WINDOW_SAVE \
 130    ".cfi_window_save"
 131 #  define CFI_PERSONALITY(enc, exp) \
 132    ".cfi_personality " CFI_STRINGIFY(enc) "," CFI_STRINGIFY(exp)
 133 #  define CFI_LSDA(enc, exp) \
 134    ".cfi_lsda " CFI_STRINGIFY(enc) "," CFI_STRINGIFY(exp)
 135 # else
 136 #  define CFI_SECTIONS(sect...)
 137 #  define CFI_STARTPROC
 138 #  define CFI_ENDPROC
 139 #  define CFI_DEF_CFA(reg, off)
 140 #  define CFI_DEF_CFA_REGISTER(reg)
 141 #  define CFI_DEF_CFA_OFFSET(off)
 142 #  define CFI_ADJUST_CFA_OFFSET(off)
 143 #  define CFI_OFFSET(reg, off)
 144 #  define CFI_REL_OFFSET(reg, off)
 145 #  define CFI_REGISTER(r1, r2)
 146 #  define CFI_RETURN_COLUMN(reg)
 147 #  define CFI_RESTORE(reg)
 148 #  define CFI_UNDEFINED(reg)
 149 #  define CFI_REMEMBER_STATE
 150 #  define CFI_RESTORE_STATE
 151 #  define CFI_WINDOW_SAVE
 152 #  define CFI_PERSONALITY(enc, exp)
 153 #  define CFI_LSDA(enc, exp)
 154 # endif
 155
 156 #endif /* __ASSEMBLER__ */
 157
 158 /* Values used for encoding parameter of cfi_personality and cfi_lsda.  */
 159 #define DW_EH_PE_absptr         0x00
 160 #define DW_EH_PE_omit           0xff
 161 #define DW_EH_PE_uleb128        0x01
 162 #define DW_EH_PE_udata2         0x02
 163 #define DW_EH_PE_udata4         0x03
 164 #define DW_EH_PE_udata8         0x04
 165 #define DW_EH_PE_sleb128        0x09
 166 #define DW_EH_PE_sdata2         0x0a
 167 #define DW_EH_PE_sdata4         0x0b
 168 #define DW_EH_PE_sdata8         0x0c
 169 #define DW_EH_PE_signed         0x08
 170 #define DW_EH_PE_pcrel          0x10
 171 #define DW_EH_PE_textrel        0x20
 172 #define DW_EH_PE_datarel        0x30
 173 #define DW_EH_PE_funcrel        0x40
 174 #define DW_EH_PE_aligned        0x50
 175 #define DW_EH_PE_indirect       0x80
 176