gdb/testsuite/gdb.btrace/x86_64-tailcall-only.S

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2016-2019 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18
  19    This file has been generated using:
  20    gcc -S -O2 -dA -g tailcall-only.c -o x86_64-tailcall-only.S  */
  21
  22         .file   "tailcall-only.c"
  23         .text
  24 .Ltext0:
  25         .p2align 4,,15
  26         .type   bar_1, @function
  27 bar_1:
  28 .LFB0:
  29         .file 1 "tailcall-only.c"
  30         # tailcall-only.c:22
  31         .loc 1 22 0
  32         .cfi_startproc
  33 # BLOCK 2 freq:10000 seq:0
  34 # PRED: ENTRY [100.0%]  (FALLTHRU)
  35         # tailcall-only.c:24
  36         .loc 1 24 0
  37         movl    $42, %eax
  38 # SUCC: EXIT [100.0%]
  39         ret
  40         .cfi_endproc
  41 .LFE0:
  42         .size   bar_1, .-bar_1
  43         .p2align 4,,15
  44         .type   bar, @function
  45 bar:
  46 .LFB1:
  47         # tailcall-only.c:28
  48         .loc 1 28 0
  49         .cfi_startproc
  50 # BLOCK 2 freq:10000 seq:0
  51 # PRED: ENTRY [100.0%]  (FALLTHRU)
  52         # tailcall-only.c:29
  53         .loc 1 29 0
  54         jmp     bar_1
  55 # SUCC: EXIT [100.0%]  (ABNORMAL,SIBCALL)
  56 .LVL0:
  57         .cfi_endproc
  58 .LFE1:
  59         .size   bar, .-bar
  60         .p2align 4,,15
  61         .type   foo_1, @function
  62 foo_1:
  63 .LFB2:
  64         # tailcall-only.c:34
  65         .loc 1 34 0
  66         .cfi_startproc
  67 # BLOCK 2 freq:10000 seq:0
  68 # PRED: ENTRY [100.0%]  (FALLTHRU)
  69         # tailcall-only.c:35
  70         .loc 1 35 0
  71         jmp     bar
  72 # SUCC: EXIT [100.0%]  (ABNORMAL,SIBCALL)
  73 .LVL1:
  74         .cfi_endproc
  75 .LFE2:
  76         .size   foo_1, .-foo_1
  77         .p2align 4,,15
  78         .type   foo, @function
  79 foo:
  80 .LFB3:
  81         # tailcall-only.c:40
  82         .loc 1 40 0
  83         .cfi_startproc
  84 # BLOCK 2 freq:10000 seq:0
  85 # PRED: ENTRY [100.0%]  (FALLTHRU)
  86         # tailcall-only.c:41
  87         .loc 1 41 0
  88         jmp     foo_1
  89 # SUCC: EXIT [100.0%]  (ABNORMAL,SIBCALL)
  90 .LVL2:
  91         .cfi_endproc
  92 .LFE3:
  93         .size   foo, .-foo
  94         .section        .text.startup,"ax",@progbits
  95         .p2align 4,,15
  96         .globl  main
  97         .type   main, @function
  98 main:
  99 .LFB4:
 100         # tailcall-only.c:46
 101         .loc 1 46 0
 102         .cfi_startproc
 103 # BLOCK 2 freq:10000 seq:0
 104 # PRED: ENTRY [100.0%]  (FALLTHRU)
 105         # tailcall-only.c:49
 106         .loc 1 49 0
 107         call    foo
 108 .LVL3:
 109         # tailcall-only.c:50
 110         .loc 1 50 0
 111         addl    $1, %eax
 112 .LVL4:
 113 # SUCC: EXIT [100.0%]
 114         # tailcall-only.c:53
 115         .loc 1 53 0
 116         ret
 117         .cfi_endproc
 118 .LFE4:
 119         .size   main, .-main
 120         .text
 121 .Letext0:
 122         .section        .debug_info,"",@progbits
 123 .Ldebug_info0:
 124         .long   0x111   # Length of Compilation Unit Info
 125         .value  0x4     # DWARF version number
 126         .long   .Ldebug_abbrev0 # Offset Into Abbrev. Section
 127         .byte   0x8     # Pointer Size (in bytes)
 128         .uleb128 0x1    # (DIE (0xb) DW_TAG_compile_unit)
 129         .long   .LASF1  # DW_AT_producer: "GNU C 4.8.3 20140911 (Red Hat 4.8.3-9) -mtune=generic -march=x86-64 -g -O2"
 130         .byte   0x1     # DW_AT_language
 131         .long   .LASF2  # DW_AT_name: "tailcall-only.c"
 132         .long   .LASF3  # DW_AT_comp_dir: ""
 133         .long   .Ldebug_ranges0+0       # DW_AT_ranges
 134         .quad   0       # DW_AT_low_pc
 135         .long   .Ldebug_line0   # DW_AT_stmt_list
 136         .uleb128 0x2    # (DIE (0x29) DW_TAG_subprogram)
 137         .long   .LASF4  # DW_AT_name: "bar_1"
 138         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 139         .byte   0x15    # DW_AT_decl_line
 140                         # DW_AT_prototyped
 141         .long   0x46    # DW_AT_type
 142         .quad   .LFB0   # DW_AT_low_pc
 143         .quad   .LFE0-.LFB0     # DW_AT_high_pc
 144         .uleb128 0x1    # DW_AT_frame_base
 145         .byte   0x9c    # DW_OP_call_frame_cfa
 146                         # DW_AT_GNU_all_call_sites
 147         .uleb128 0x3    # (DIE (0x46) DW_TAG_base_type)
 148         .byte   0x4     # DW_AT_byte_size
 149         .byte   0x5     # DW_AT_encoding
 150         .ascii "int\0"  # DW_AT_name
 151         .uleb128 0x4    # (DIE (0x4d) DW_TAG_subprogram)
 152         .ascii "bar\0"  # DW_AT_name
 153         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 154         .byte   0x1b    # DW_AT_decl_line
 155                         # DW_AT_prototyped
 156         .long   0x46    # DW_AT_type
 157         .quad   .LFB1   # DW_AT_low_pc
 158         .quad   .LFE1-.LFB1     # DW_AT_high_pc
 159         .uleb128 0x1    # DW_AT_frame_base
 160         .byte   0x9c    # DW_OP_call_frame_cfa
 161                         # DW_AT_GNU_all_call_sites
 162         .long   0x7c    # DW_AT_sibling
 163         .uleb128 0x5    # (DIE (0x6e) DW_TAG_GNU_call_site)
 164         .quad   .LVL0   # DW_AT_low_pc
 165                         # DW_AT_GNU_tail_call
 166         .long   0x29    # DW_AT_abstract_origin
 167         .byte   0       # end of children of DIE 0x4d
 168         .uleb128 0x6    # (DIE (0x7c) DW_TAG_subprogram)
 169         .long   .LASF0  # DW_AT_name: "foo_1"
 170         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 171         .byte   0x21    # DW_AT_decl_line
 172                         # DW_AT_prototyped
 173         .long   0x46    # DW_AT_type
 174         .quad   .LFB2   # DW_AT_low_pc
 175         .quad   .LFE2-.LFB2     # DW_AT_high_pc
 176         .uleb128 0x1    # DW_AT_frame_base
 177         .byte   0x9c    # DW_OP_call_frame_cfa
 178                         # DW_AT_GNU_all_call_sites
 179         .long   0xab    # DW_AT_sibling
 180         .uleb128 0x5    # (DIE (0x9d) DW_TAG_GNU_call_site)
 181         .quad   .LVL1   # DW_AT_low_pc
 182                         # DW_AT_GNU_tail_call
 183         .long   0x4d    # DW_AT_abstract_origin
 184         .byte   0       # end of children of DIE 0x7c
 185         .uleb128 0x4    # (DIE (0xab) DW_TAG_subprogram)
 186         .ascii "foo\0"  # DW_AT_name
 187         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 188         .byte   0x27    # DW_AT_decl_line
 189                         # DW_AT_prototyped
 190         .long   0x46    # DW_AT_type
 191         .quad   .LFB3   # DW_AT_low_pc
 192         .quad   .LFE3-.LFB3     # DW_AT_high_pc
 193         .uleb128 0x1    # DW_AT_frame_base
 194         .byte   0x9c    # DW_OP_call_frame_cfa
 195                         # DW_AT_GNU_all_call_sites
 196         .long   0xda    # DW_AT_sibling
 197         .uleb128 0x5    # (DIE (0xcc) DW_TAG_GNU_call_site)
 198         .quad   .LVL2   # DW_AT_low_pc
 199                         # DW_AT_GNU_tail_call
 200         .long   0x7c    # DW_AT_abstract_origin
 201         .byte   0       # end of children of DIE 0xab
 202         .uleb128 0x7    # (DIE (0xda) DW_TAG_subprogram)
 203                         # DW_AT_external
 204         .long   .LASF5  # DW_AT_name: "main"
 205         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 206         .byte   0x2d    # DW_AT_decl_line
 207                         # DW_AT_prototyped
 208         .long   0x46    # DW_AT_type
 209         .quad   .LFB4   # DW_AT_low_pc
 210         .quad   .LFE4-.LFB4     # DW_AT_high_pc
 211         .uleb128 0x1    # DW_AT_frame_base
 212         .byte   0x9c    # DW_OP_call_frame_cfa
 213                         # DW_AT_GNU_all_call_sites
 214         .uleb128 0x8    # (DIE (0xf7) DW_TAG_variable)
 215         .long   .LASF6  # DW_AT_name: "answer"
 216         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 217         .byte   0x2f    # DW_AT_decl_line
 218         .long   0x46    # DW_AT_type
 219         .long   .LLST0  # DW_AT_location
 220         .uleb128 0x9    # (DIE (0x106) DW_TAG_GNU_call_site)
 221         .quad   .LVL3   # DW_AT_low_pc
 222         .long   0xab    # DW_AT_abstract_origin
 223         .byte   0       # end of children of DIE 0xda
 224         .byte   0       # end of children of DIE 0xb
 225         .section        .debug_abbrev,"",@progbits
 226 .Ldebug_abbrev0:
 227         .uleb128 0x1    # (abbrev code)
 228         .uleb128 0x11   # (TAG: DW_TAG_compile_unit)
 229         .byte   0x1     # DW_children_yes
 230         .uleb128 0x25   # (DW_AT_producer)
 231         .uleb128 0xe    # (DW_FORM_strp)
 232         .uleb128 0x13   # (DW_AT_language)
 233         .uleb128 0xb    # (DW_FORM_data1)
 234         .uleb128 0x3    # (DW_AT_name)
 235         .uleb128 0xe    # (DW_FORM_strp)
 236         .uleb128 0x1b   # (DW_AT_comp_dir)
 237         .uleb128 0xe    # (DW_FORM_strp)
 238         .uleb128 0x55   # (DW_AT_ranges)
 239         .uleb128 0x17   # (DW_FORM_sec_offset)
 240         .uleb128 0x11   # (DW_AT_low_pc)
 241         .uleb128 0x1    # (DW_FORM_addr)
 242         .uleb128 0x10   # (DW_AT_stmt_list)
 243         .uleb128 0x17   # (DW_FORM_sec_offset)
 244         .byte   0
 245         .byte   0
 246         .uleb128 0x2    # (abbrev code)
 247         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 248         .byte   0       # DW_children_no
 249         .uleb128 0x3    # (DW_AT_name)
 250         .uleb128 0xe    # (DW_FORM_strp)
 251         .uleb128 0x3a   # (DW_AT_decl_file)
 252         .uleb128 0xb    # (DW_FORM_data1)
 253         .uleb128 0x3b   # (DW_AT_decl_line)
 254         .uleb128 0xb    # (DW_FORM_data1)
 255         .uleb128 0x27   # (DW_AT_prototyped)
 256         .uleb128 0x19   # (DW_FORM_flag_present)
 257         .uleb128 0x49   # (DW_AT_type)
 258         .uleb128 0x13   # (DW_FORM_ref4)
 259         .uleb128 0x11   # (DW_AT_low_pc)
 260         .uleb128 0x1    # (DW_FORM_addr)
 261         .uleb128 0x12   # (DW_AT_high_pc)
 262         .uleb128 0x7    # (DW_FORM_data8)
 263         .uleb128 0x40   # (DW_AT_frame_base)
 264         .uleb128 0x18   # (DW_FORM_exprloc)
 265         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 266         .uleb128 0x19   # (DW_FORM_flag_present)
 267         .byte   0
 268         .byte   0
 269         .uleb128 0x3    # (abbrev code)
 270         .uleb128 0x24   # (TAG: DW_TAG_base_type)
 271         .byte   0       # DW_children_no
 272         .uleb128 0xb    # (DW_AT_byte_size)
 273         .uleb128 0xb    # (DW_FORM_data1)
 274         .uleb128 0x3e   # (DW_AT_encoding)
 275         .uleb128 0xb    # (DW_FORM_data1)
 276         .uleb128 0x3    # (DW_AT_name)
 277         .uleb128 0x8    # (DW_FORM_string)
 278         .byte   0
 279         .byte   0
 280         .uleb128 0x4    # (abbrev code)
 281         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 282         .byte   0x1     # DW_children_yes
 283         .uleb128 0x3    # (DW_AT_name)
 284         .uleb128 0x8    # (DW_FORM_string)
 285         .uleb128 0x3a   # (DW_AT_decl_file)
 286         .uleb128 0xb    # (DW_FORM_data1)
 287         .uleb128 0x3b   # (DW_AT_decl_line)
 288         .uleb128 0xb    # (DW_FORM_data1)
 289         .uleb128 0x27   # (DW_AT_prototyped)
 290         .uleb128 0x19   # (DW_FORM_flag_present)
 291         .uleb128 0x49   # (DW_AT_type)
 292         .uleb128 0x13   # (DW_FORM_ref4)
 293         .uleb128 0x11   # (DW_AT_low_pc)
 294         .uleb128 0x1    # (DW_FORM_addr)
 295         .uleb128 0x12   # (DW_AT_high_pc)
 296         .uleb128 0x7    # (DW_FORM_data8)
 297         .uleb128 0x40   # (DW_AT_frame_base)
 298         .uleb128 0x18   # (DW_FORM_exprloc)
 299         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 300         .uleb128 0x19   # (DW_FORM_flag_present)
 301         .uleb128 0x1    # (DW_AT_sibling)
 302         .uleb128 0x13   # (DW_FORM_ref4)
 303         .byte   0
 304         .byte   0
 305         .uleb128 0x5    # (abbrev code)
 306         .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site)
 307         .byte   0       # DW_children_no
 308         .uleb128 0x11   # (DW_AT_low_pc)
 309         .uleb128 0x1    # (DW_FORM_addr)
 310         .uleb128 0x2115 # (DW_AT_GNU_tail_call)
 311         .uleb128 0x19   # (DW_FORM_flag_present)
 312         .uleb128 0x31   # (DW_AT_abstract_origin)
 313         .uleb128 0x13   # (DW_FORM_ref4)
 314         .byte   0
 315         .byte   0
 316         .uleb128 0x6    # (abbrev code)
 317         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 318         .byte   0x1     # DW_children_yes
 319         .uleb128 0x3    # (DW_AT_name)
 320         .uleb128 0xe    # (DW_FORM_strp)
 321         .uleb128 0x3a   # (DW_AT_decl_file)
 322         .uleb128 0xb    # (DW_FORM_data1)
 323         .uleb128 0x3b   # (DW_AT_decl_line)
 324         .uleb128 0xb    # (DW_FORM_data1)
 325         .uleb128 0x27   # (DW_AT_prototyped)
 326         .uleb128 0x19   # (DW_FORM_flag_present)
 327         .uleb128 0x49   # (DW_AT_type)
 328         .uleb128 0x13   # (DW_FORM_ref4)
 329         .uleb128 0x11   # (DW_AT_low_pc)
 330         .uleb128 0x1    # (DW_FORM_addr)
 331         .uleb128 0x12   # (DW_AT_high_pc)
 332         .uleb128 0x7    # (DW_FORM_data8)
 333         .uleb128 0x40   # (DW_AT_frame_base)
 334         .uleb128 0x18   # (DW_FORM_exprloc)
 335         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 336         .uleb128 0x19   # (DW_FORM_flag_present)
 337         .uleb128 0x1    # (DW_AT_sibling)
 338         .uleb128 0x13   # (DW_FORM_ref4)
 339         .byte   0
 340         .byte   0
 341         .uleb128 0x7    # (abbrev code)
 342         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 343         .byte   0x1     # DW_children_yes
 344         .uleb128 0x3f   # (DW_AT_external)
 345         .uleb128 0x19   # (DW_FORM_flag_present)
 346         .uleb128 0x3    # (DW_AT_name)
 347         .uleb128 0xe    # (DW_FORM_strp)
 348         .uleb128 0x3a   # (DW_AT_decl_file)
 349         .uleb128 0xb    # (DW_FORM_data1)
 350         .uleb128 0x3b   # (DW_AT_decl_line)
 351         .uleb128 0xb    # (DW_FORM_data1)
 352         .uleb128 0x27   # (DW_AT_prototyped)
 353         .uleb128 0x19   # (DW_FORM_flag_present)
 354         .uleb128 0x49   # (DW_AT_type)
 355         .uleb128 0x13   # (DW_FORM_ref4)
 356         .uleb128 0x11   # (DW_AT_low_pc)
 357         .uleb128 0x1    # (DW_FORM_addr)
 358         .uleb128 0x12   # (DW_AT_high_pc)
 359         .uleb128 0x7    # (DW_FORM_data8)
 360         .uleb128 0x40   # (DW_AT_frame_base)
 361         .uleb128 0x18   # (DW_FORM_exprloc)
 362         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 363         .uleb128 0x19   # (DW_FORM_flag_present)
 364         .byte   0
 365         .byte   0
 366         .uleb128 0x8    # (abbrev code)
 367         .uleb128 0x34   # (TAG: DW_TAG_variable)
 368         .byte   0       # DW_children_no
 369         .uleb128 0x3    # (DW_AT_name)
 370         .uleb128 0xe    # (DW_FORM_strp)
 371         .uleb128 0x3a   # (DW_AT_decl_file)
 372         .uleb128 0xb    # (DW_FORM_data1)
 373         .uleb128 0x3b   # (DW_AT_decl_line)
 374         .uleb128 0xb    # (DW_FORM_data1)
 375         .uleb128 0x49   # (DW_AT_type)
 376         .uleb128 0x13   # (DW_FORM_ref4)
 377         .uleb128 0x2    # (DW_AT_location)
 378         .uleb128 0x17   # (DW_FORM_sec_offset)
 379         .byte   0
 380         .byte   0
 381         .uleb128 0x9    # (abbrev code)
 382         .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site)
 383         .byte   0       # DW_children_no
 384         .uleb128 0x11   # (DW_AT_low_pc)
 385         .uleb128 0x1    # (DW_FORM_addr)
 386         .uleb128 0x31   # (DW_AT_abstract_origin)
 387         .uleb128 0x13   # (DW_FORM_ref4)
 388         .byte   0
 389         .byte   0
 390         .byte   0
 391         .section        .debug_loc,"",@progbits
 392 .Ldebug_loc0:
 393 .LLST0:
 394         .quad   .LVL3   # Location list begin address (*.LLST0)
 395         .quad   .LVL4   # Location list end address (*.LLST0)
 396         .value  0x3     # Location expression size
 397         .byte   0x70    # DW_OP_breg0
 398         .sleb128 1
 399         .byte   0x9f    # DW_OP_stack_value
 400         .quad   .LVL4   # Location list begin address (*.LLST0)
 401         .quad   .LFE4   # Location list end address (*.LLST0)
 402         .value  0x1     # Location expression size
 403         .byte   0x50    # DW_OP_reg0
 404         .quad   0       # Location list terminator begin (*.LLST0)
 405         .quad   0       # Location list terminator end (*.LLST0)
 406         .section        .debug_aranges,"",@progbits
 407         .long   0x3c    # Length of Address Ranges Info
 408         .value  0x2     # DWARF Version
 409         .long   .Ldebug_info0   # Offset of Compilation Unit Info
 410         .byte   0x8     # Size of Address
 411         .byte   0       # Size of Segment Descriptor
 412         .value  0       # Pad to 16 byte boundary
 413         .value  0
 414         .quad   .Ltext0 # Address
 415         .quad   .Letext0-.Ltext0        # Length
 416         .quad   .LFB4   # Address
 417         .quad   .LFE4-.LFB4     # Length
 418         .quad   0
 419         .quad   0
 420         .section        .debug_ranges,"",@progbits
 421 .Ldebug_ranges0:
 422         .quad   .Ltext0 # Offset 0
 423         .quad   .Letext0
 424         .quad   .LFB4   # Offset 0x10
 425         .quad   .LFE4
 426         .quad   0
 427         .quad   0
 428         .section        .debug_line,"",@progbits
 429 .Ldebug_line0:
 430         .section        .debug_str,"MS",@progbits,1
 431 .LASF4:
 432         .string "bar_1"
 433 .LASF2:
 434         .string "tailcall-only.c"
 435 .LASF1:
 436         .string "GNU C 4.8.3 20140911 (Red Hat 4.8.3-9) -mtune=generic -march=x86-64 -g -O2"
 437 .LASF6:
 438         .string "answer"
 439 .LASF5:
 440         .string "main"
 441 .LASF3:
 442         .string ""
 443 .LASF0:
 444         .string "foo_1"
 445         .ident  "GCC: (GNU) 4.8.3 20140911 (Red Hat 4.8.3-9)"
 446         .section        .note.GNU-stack,"",@progbits