gdb/testsuite/gdb.btrace/i686-tailcall.S

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2013-2017 Free Software Foundation, Inc.
   4
   5    Contributed by Intel Corp. <markus.t.metzger@intel.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20
  21    This file has been generated using:
  22    gcc -S -O2 -dA -g tailcall.c -o i686-tailcall.S  */
  23
  24         .file   "tailcall.c"
  25         .text
  26 .Ltext0:
  27         .p2align 4,,15
  28         .type   bar, @function
  29 bar:
  30 .LFB0:
  31         .file 1 "tailcall.c"
  32         # tailcall.c:22
  33         .loc 1 22 0
  34         .cfi_startproc
  35 # BLOCK 2 freq:10000 seq:0
  36 # PRED: ENTRY [100.0%]  (FALLTHRU)
  37         # tailcall.c:24
  38         .loc 1 24 0
  39         movl    $42, %eax
  40 # SUCC: EXIT [100.0%]
  41         ret
  42         .cfi_endproc
  43 .LFE0:
  44         .size   bar, .-bar
  45         .p2align 4,,15
  46         .type   foo, @function
  47 foo:
  48 .LFB1:
  49         # tailcall.c:28
  50         .loc 1 28 0
  51         .cfi_startproc
  52 # BLOCK 2 freq:10000 seq:0
  53 # PRED: ENTRY [100.0%]  (FALLTHRU)
  54         # tailcall.c:29
  55         .loc 1 29 0
  56         jmp     bar
  57 # SUCC: EXIT [100.0%]  (ABNORMAL,SIBCALL)
  58 .LVL0:
  59         .cfi_endproc
  60 .LFE1:
  61         .size   foo, .-foo
  62         .section        .text.startup,"ax",@progbits
  63         .p2align 4,,15
  64         .globl  main
  65         .type   main, @function
  66 main:
  67 .LFB2:
  68         # tailcall.c:34
  69         .loc 1 34 0
  70         .cfi_startproc
  71 # BLOCK 2 freq:10000 seq:0
  72 # PRED: ENTRY [100.0%]  (FALLTHRU)
  73         # tailcall.c:37
  74         .loc 1 37 0
  75         call    foo
  76 .LVL1:
  77         # tailcall.c:38
  78         .loc 1 38 0
  79         addl    $1, %eax
  80 .LVL2:
  81 # SUCC: EXIT [100.0%]
  82         # tailcall.c:41
  83         .loc 1 41 0
  84         ret
  85         .cfi_endproc
  86 .LFE2:
  87         .size   main, .-main
  88         .text
  89 .Letext0:
  90         .section        .debug_info,"",@progbits
  91 .Ldebug_info0:
  92         .long   0x8f    # Length of Compilation Unit Info
  93         .value  0x4     # DWARF version number
  94         .long   .Ldebug_abbrev0 # Offset Into Abbrev. Section
  95         .byte   0x4     # Pointer Size (in bytes)
  96         .uleb128 0x1    # (DIE (0xb) DW_TAG_compile_unit)
  97         .long   .LASF0  # DW_AT_producer: "GNU C 4.8.3 20140911 (Red Hat 4.8.3-7) -mtune=generic -march=i686 -g -O2"
  98         .byte   0x1     # DW_AT_language
  99         .long   .LASF1  # DW_AT_name: "tailcall.c"
 100         .long   .LASF2  # DW_AT_comp_dir: ""
 101         .long   .Ldebug_ranges0+0       # DW_AT_ranges
 102         .long   0       # DW_AT_low_pc
 103         .long   .Ldebug_line0   # DW_AT_stmt_list
 104         .uleb128 0x2    # (DIE (0x25) DW_TAG_subprogram)
 105         .ascii "bar\0"  # DW_AT_name
 106         .byte   0x1     # DW_AT_decl_file (tailcall.c)
 107         .byte   0x15    # DW_AT_decl_line
 108                         # DW_AT_prototyped
 109         .long   0x3a    # DW_AT_type
 110         .long   .LFB0   # DW_AT_low_pc
 111         .long   .LFE0-.LFB0     # DW_AT_high_pc
 112         .uleb128 0x1    # DW_AT_frame_base
 113         .byte   0x9c    # DW_OP_call_frame_cfa
 114                         # DW_AT_GNU_all_call_sites
 115         .uleb128 0x3    # (DIE (0x3a) DW_TAG_base_type)
 116         .byte   0x4     # DW_AT_byte_size
 117         .byte   0x5     # DW_AT_encoding
 118         .ascii "int\0"  # DW_AT_name
 119         .uleb128 0x4    # (DIE (0x41) DW_TAG_subprogram)
 120         .ascii "foo\0"  # DW_AT_name
 121         .byte   0x1     # DW_AT_decl_file (tailcall.c)
 122         .byte   0x1b    # DW_AT_decl_line
 123                         # DW_AT_prototyped
 124         .long   0x3a    # DW_AT_type
 125         .long   .LFB1   # DW_AT_low_pc
 126         .long   .LFE1-.LFB1     # DW_AT_high_pc
 127         .uleb128 0x1    # DW_AT_frame_base
 128         .byte   0x9c    # DW_OP_call_frame_cfa
 129                         # DW_AT_GNU_all_call_sites
 130         .long   0x64    # DW_AT_sibling
 131         .uleb128 0x5    # (DIE (0x5a) DW_TAG_GNU_call_site)
 132         .long   .LVL0   # DW_AT_low_pc
 133                         # DW_AT_GNU_tail_call
 134         .long   0x25    # DW_AT_abstract_origin
 135         .byte   0       # end of children of DIE 0x41
 136         .uleb128 0x6    # (DIE (0x64) DW_TAG_subprogram)
 137                         # DW_AT_external
 138         .long   .LASF3  # DW_AT_name: "main"
 139         .byte   0x1     # DW_AT_decl_file (tailcall.c)
 140         .byte   0x21    # DW_AT_decl_line
 141                         # DW_AT_prototyped
 142         .long   0x3a    # DW_AT_type
 143         .long   .LFB2   # DW_AT_low_pc
 144         .long   .LFE2-.LFB2     # DW_AT_high_pc
 145         .uleb128 0x1    # DW_AT_frame_base
 146         .byte   0x9c    # DW_OP_call_frame_cfa
 147                         # DW_AT_GNU_all_call_sites
 148         .uleb128 0x7    # (DIE (0x79) DW_TAG_variable)
 149         .long   .LASF4  # DW_AT_name: "answer"
 150         .byte   0x1     # DW_AT_decl_file (tailcall.c)
 151         .byte   0x23    # DW_AT_decl_line
 152         .long   0x3a    # DW_AT_type
 153         .long   .LLST0  # DW_AT_location
 154         .uleb128 0x8    # (DIE (0x88) DW_TAG_GNU_call_site)
 155         .long   .LVL1   # DW_AT_low_pc
 156         .long   0x41    # DW_AT_abstract_origin
 157         .byte   0       # end of children of DIE 0x64
 158         .byte   0       # end of children of DIE 0xb
 159         .section        .debug_abbrev,"",@progbits
 160 .Ldebug_abbrev0:
 161         .uleb128 0x1    # (abbrev code)
 162         .uleb128 0x11   # (TAG: DW_TAG_compile_unit)
 163         .byte   0x1     # DW_children_yes
 164         .uleb128 0x25   # (DW_AT_producer)
 165         .uleb128 0xe    # (DW_FORM_strp)
 166         .uleb128 0x13   # (DW_AT_language)
 167         .uleb128 0xb    # (DW_FORM_data1)
 168         .uleb128 0x3    # (DW_AT_name)
 169         .uleb128 0xe    # (DW_FORM_strp)
 170         .uleb128 0x1b   # (DW_AT_comp_dir)
 171         .uleb128 0xe    # (DW_FORM_strp)
 172         .uleb128 0x55   # (DW_AT_ranges)
 173         .uleb128 0x17   # (DW_FORM_sec_offset)
 174         .uleb128 0x11   # (DW_AT_low_pc)
 175         .uleb128 0x1    # (DW_FORM_addr)
 176         .uleb128 0x10   # (DW_AT_stmt_list)
 177         .uleb128 0x17   # (DW_FORM_sec_offset)
 178         .byte   0
 179         .byte   0
 180         .uleb128 0x2    # (abbrev code)
 181         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 182         .byte   0       # DW_children_no
 183         .uleb128 0x3    # (DW_AT_name)
 184         .uleb128 0x8    # (DW_FORM_string)
 185         .uleb128 0x3a   # (DW_AT_decl_file)
 186         .uleb128 0xb    # (DW_FORM_data1)
 187         .uleb128 0x3b   # (DW_AT_decl_line)
 188         .uleb128 0xb    # (DW_FORM_data1)
 189         .uleb128 0x27   # (DW_AT_prototyped)
 190         .uleb128 0x19   # (DW_FORM_flag_present)
 191         .uleb128 0x49   # (DW_AT_type)
 192         .uleb128 0x13   # (DW_FORM_ref4)
 193         .uleb128 0x11   # (DW_AT_low_pc)
 194         .uleb128 0x1    # (DW_FORM_addr)
 195         .uleb128 0x12   # (DW_AT_high_pc)
 196         .uleb128 0x6    # (DW_FORM_data4)
 197         .uleb128 0x40   # (DW_AT_frame_base)
 198         .uleb128 0x18   # (DW_FORM_exprloc)
 199         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 200         .uleb128 0x19   # (DW_FORM_flag_present)
 201         .byte   0
 202         .byte   0
 203         .uleb128 0x3    # (abbrev code)
 204         .uleb128 0x24   # (TAG: DW_TAG_base_type)
 205         .byte   0       # DW_children_no
 206         .uleb128 0xb    # (DW_AT_byte_size)
 207         .uleb128 0xb    # (DW_FORM_data1)
 208         .uleb128 0x3e   # (DW_AT_encoding)
 209         .uleb128 0xb    # (DW_FORM_data1)
 210         .uleb128 0x3    # (DW_AT_name)
 211         .uleb128 0x8    # (DW_FORM_string)
 212         .byte   0
 213         .byte   0
 214         .uleb128 0x4    # (abbrev code)
 215         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 216         .byte   0x1     # DW_children_yes
 217         .uleb128 0x3    # (DW_AT_name)
 218         .uleb128 0x8    # (DW_FORM_string)
 219         .uleb128 0x3a   # (DW_AT_decl_file)
 220         .uleb128 0xb    # (DW_FORM_data1)
 221         .uleb128 0x3b   # (DW_AT_decl_line)
 222         .uleb128 0xb    # (DW_FORM_data1)
 223         .uleb128 0x27   # (DW_AT_prototyped)
 224         .uleb128 0x19   # (DW_FORM_flag_present)
 225         .uleb128 0x49   # (DW_AT_type)
 226         .uleb128 0x13   # (DW_FORM_ref4)
 227         .uleb128 0x11   # (DW_AT_low_pc)
 228         .uleb128 0x1    # (DW_FORM_addr)
 229         .uleb128 0x12   # (DW_AT_high_pc)
 230         .uleb128 0x6    # (DW_FORM_data4)
 231         .uleb128 0x40   # (DW_AT_frame_base)
 232         .uleb128 0x18   # (DW_FORM_exprloc)
 233         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 234         .uleb128 0x19   # (DW_FORM_flag_present)
 235         .uleb128 0x1    # (DW_AT_sibling)
 236         .uleb128 0x13   # (DW_FORM_ref4)
 237         .byte   0
 238         .byte   0
 239         .uleb128 0x5    # (abbrev code)
 240         .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site)
 241         .byte   0       # DW_children_no
 242         .uleb128 0x11   # (DW_AT_low_pc)
 243         .uleb128 0x1    # (DW_FORM_addr)
 244         .uleb128 0x2115 # (DW_AT_GNU_tail_call)
 245         .uleb128 0x19   # (DW_FORM_flag_present)
 246         .uleb128 0x31   # (DW_AT_abstract_origin)
 247         .uleb128 0x13   # (DW_FORM_ref4)
 248         .byte   0
 249         .byte   0
 250         .uleb128 0x6    # (abbrev code)
 251         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 252         .byte   0x1     # DW_children_yes
 253         .uleb128 0x3f   # (DW_AT_external)
 254         .uleb128 0x19   # (DW_FORM_flag_present)
 255         .uleb128 0x3    # (DW_AT_name)
 256         .uleb128 0xe    # (DW_FORM_strp)
 257         .uleb128 0x3a   # (DW_AT_decl_file)
 258         .uleb128 0xb    # (DW_FORM_data1)
 259         .uleb128 0x3b   # (DW_AT_decl_line)
 260         .uleb128 0xb    # (DW_FORM_data1)
 261         .uleb128 0x27   # (DW_AT_prototyped)
 262         .uleb128 0x19   # (DW_FORM_flag_present)
 263         .uleb128 0x49   # (DW_AT_type)
 264         .uleb128 0x13   # (DW_FORM_ref4)
 265         .uleb128 0x11   # (DW_AT_low_pc)
 266         .uleb128 0x1    # (DW_FORM_addr)
 267         .uleb128 0x12   # (DW_AT_high_pc)
 268         .uleb128 0x6    # (DW_FORM_data4)
 269         .uleb128 0x40   # (DW_AT_frame_base)
 270         .uleb128 0x18   # (DW_FORM_exprloc)
 271         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 272         .uleb128 0x19   # (DW_FORM_flag_present)
 273         .byte   0
 274         .byte   0
 275         .uleb128 0x7    # (abbrev code)
 276         .uleb128 0x34   # (TAG: DW_TAG_variable)
 277         .byte   0       # DW_children_no
 278         .uleb128 0x3    # (DW_AT_name)
 279         .uleb128 0xe    # (DW_FORM_strp)
 280         .uleb128 0x3a   # (DW_AT_decl_file)
 281         .uleb128 0xb    # (DW_FORM_data1)
 282         .uleb128 0x3b   # (DW_AT_decl_line)
 283         .uleb128 0xb    # (DW_FORM_data1)
 284         .uleb128 0x49   # (DW_AT_type)
 285         .uleb128 0x13   # (DW_FORM_ref4)
 286         .uleb128 0x2    # (DW_AT_location)
 287         .uleb128 0x17   # (DW_FORM_sec_offset)
 288         .byte   0
 289         .byte   0
 290         .uleb128 0x8    # (abbrev code)
 291         .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site)
 292         .byte   0       # DW_children_no
 293         .uleb128 0x11   # (DW_AT_low_pc)
 294         .uleb128 0x1    # (DW_FORM_addr)
 295         .uleb128 0x31   # (DW_AT_abstract_origin)
 296         .uleb128 0x13   # (DW_FORM_ref4)
 297         .byte   0
 298         .byte   0
 299         .byte   0
 300         .section        .debug_loc,"",@progbits
 301 .Ldebug_loc0:
 302 .LLST0:
 303         .long   .LVL1   # Location list begin address (*.LLST0)
 304         .long   .LVL2   # Location list end address (*.LLST0)
 305         .value  0x3     # Location expression size
 306         .byte   0x70    # DW_OP_breg0
 307         .sleb128 1
 308         .byte   0x9f    # DW_OP_stack_value
 309         .long   .LVL2   # Location list begin address (*.LLST0)
 310         .long   .LFE2   # Location list end address (*.LLST0)
 311         .value  0x1     # Location expression size
 312         .byte   0x50    # DW_OP_reg0
 313         .long   0       # Location list terminator begin (*.LLST0)
 314         .long   0       # Location list terminator end (*.LLST0)
 315         .section        .debug_aranges,"",@progbits
 316         .long   0x24    # Length of Address Ranges Info
 317         .value  0x2     # DWARF Version
 318         .long   .Ldebug_info0   # Offset of Compilation Unit Info
 319         .byte   0x4     # Size of Address
 320         .byte   0       # Size of Segment Descriptor
 321         .value  0       # Pad to 8 byte boundary
 322         .value  0
 323         .long   .Ltext0 # Address
 324         .long   .Letext0-.Ltext0        # Length
 325         .long   .LFB2   # Address
 326         .long   .LFE2-.LFB2     # Length
 327         .long   0
 328         .long   0
 329         .section        .debug_ranges,"",@progbits
 330 .Ldebug_ranges0:
 331         .long   .Ltext0 # Offset 0
 332         .long   .Letext0
 333         .long   .LFB2   # Offset 0x8
 334         .long   .LFE2
 335         .long   0
 336         .long   0
 337         .section        .debug_line,"",@progbits
 338 .Ldebug_line0:
 339         .section        .debug_str,"MS",@progbits,1
 340 .LASF1:
 341         .string "tailcall.c"
 342 .LASF3:
 343         .string "main"
 344 .LASF0:
 345         .string "GNU C 4.8.3 20140911 (Red Hat 4.8.3-7) -mtune=generic -march=i686 -g -O2"
 346 .LASF4:
 347         .string "answer"
 348 .LASF2:
 349         .string ""
 350         .ident  "GCC: (GNU) 4.8.3 20140911 (Red Hat 4.8.3-7)"
 351         .section        .note.GNU-stack,"",@progbits