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

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2016-2017 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 -m32 -march=i686 -S -O2 -dA -g tailcall-only.c -o i686-tailcall-only.S
  21  */
  22
  23         .file   "tailcall-only.c"
  24         .text
  25 .Ltext0:
  26         .p2align 4,,15
  27         .type   bar_1, @function
  28 bar_1:
  29 .LFB0:
  30         .file 1 "tailcall-only.c"
  31         # tailcall-only.c:22
  32         .loc 1 22 0
  33         .cfi_startproc
  34 # BLOCK 2 freq:10000 seq:0
  35 # PRED: ENTRY [100.0%]  (FALLTHRU)
  36         # tailcall-only.c:24
  37         .loc 1 24 0
  38         movl    $42, %eax
  39 # SUCC: EXIT [100.0%]
  40         ret
  41         .cfi_endproc
  42 .LFE0:
  43         .size   bar_1, .-bar_1
  44         .p2align 4,,15
  45         .type   bar, @function
  46 bar:
  47 .LFB1:
  48         # tailcall-only.c:28
  49         .loc 1 28 0
  50         .cfi_startproc
  51 # BLOCK 2 freq:10000 seq:0
  52 # PRED: ENTRY [100.0%]  (FALLTHRU)
  53         # tailcall-only.c:29
  54         .loc 1 29 0
  55         jmp     bar_1
  56 # SUCC: EXIT [100.0%]  (ABNORMAL,SIBCALL)
  57 .LVL0:
  58         .cfi_endproc
  59 .LFE1:
  60         .size   bar, .-bar
  61         .p2align 4,,15
  62         .type   foo_1, @function
  63 foo_1:
  64 .LFB2:
  65         # tailcall-only.c:34
  66         .loc 1 34 0
  67         .cfi_startproc
  68 # BLOCK 2 freq:10000 seq:0
  69 # PRED: ENTRY [100.0%]  (FALLTHRU)
  70         # tailcall-only.c:35
  71         .loc 1 35 0
  72         jmp     bar
  73 # SUCC: EXIT [100.0%]  (ABNORMAL,SIBCALL)
  74 .LVL1:
  75         .cfi_endproc
  76 .LFE2:
  77         .size   foo_1, .-foo_1
  78         .p2align 4,,15
  79         .type   foo, @function
  80 foo:
  81 .LFB3:
  82         # tailcall-only.c:40
  83         .loc 1 40 0
  84         .cfi_startproc
  85 # BLOCK 2 freq:10000 seq:0
  86 # PRED: ENTRY [100.0%]  (FALLTHRU)
  87         # tailcall-only.c:41
  88         .loc 1 41 0
  89         jmp     foo_1
  90 # SUCC: EXIT [100.0%]  (ABNORMAL,SIBCALL)
  91 .LVL2:
  92         .cfi_endproc
  93 .LFE3:
  94         .size   foo, .-foo
  95         .section        .text.startup,"ax",@progbits
  96         .p2align 4,,15
  97         .globl  main
  98         .type   main, @function
  99 main:
 100 .LFB4:
 101         # tailcall-only.c:46
 102         .loc 1 46 0
 103         .cfi_startproc
 104 # BLOCK 2 freq:10000 seq:0
 105 # PRED: ENTRY [100.0%]  (FALLTHRU)
 106         # tailcall-only.c:49
 107         .loc 1 49 0
 108         call    foo
 109 .LVL3:
 110         # tailcall-only.c:50
 111         .loc 1 50 0
 112         addl    $1, %eax
 113 .LVL4:
 114 # SUCC: EXIT [100.0%]
 115         # tailcall-only.c:53
 116         .loc 1 53 0
 117         ret
 118         .cfi_endproc
 119 .LFE4:
 120         .size   main, .-main
 121         .text
 122 .Letext0:
 123         .section        .debug_info,"",@progbits
 124 .Ldebug_info0:
 125         .long   0xd5    # Length of Compilation Unit Info
 126         .value  0x4     # DWARF version number
 127         .long   .Ldebug_abbrev0 # Offset Into Abbrev. Section
 128         .byte   0x4     # Pointer Size (in bytes)
 129         .uleb128 0x1    # (DIE (0xb) DW_TAG_compile_unit)
 130         .long   .LASF1  # DW_AT_producer: "GNU C 4.8.3 20140911 (Red Hat 4.8.3-9) -m32 -march=i686 -g -O2"
 131         .byte   0x1     # DW_AT_language
 132         .long   .LASF2  # DW_AT_name: "tailcall-only.c"
 133         .long   .LASF3  # DW_AT_comp_dir: ""
 134         .long   .Ldebug_ranges0+0       # DW_AT_ranges
 135         .long   0       # DW_AT_low_pc
 136         .long   .Ldebug_line0   # DW_AT_stmt_list
 137         .uleb128 0x2    # (DIE (0x25) DW_TAG_subprogram)
 138         .long   .LASF4  # DW_AT_name: "bar_1"
 139         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 140         .byte   0x15    # DW_AT_decl_line
 141                         # DW_AT_prototyped
 142         .long   0x3a    # DW_AT_type
 143         .long   .LFB0   # DW_AT_low_pc
 144         .long   .LFE0-.LFB0     # 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 0x3    # (DIE (0x3a) DW_TAG_base_type)
 149         .byte   0x4     # DW_AT_byte_size
 150         .byte   0x5     # DW_AT_encoding
 151         .ascii "int\0"  # DW_AT_name
 152         .uleb128 0x4    # (DIE (0x41) DW_TAG_subprogram)
 153         .ascii "bar\0"  # DW_AT_name
 154         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 155         .byte   0x1b    # DW_AT_decl_line
 156                         # DW_AT_prototyped
 157         .long   0x3a    # DW_AT_type
 158         .long   .LFB1   # DW_AT_low_pc
 159         .long   .LFE1-.LFB1     # DW_AT_high_pc
 160         .uleb128 0x1    # DW_AT_frame_base
 161         .byte   0x9c    # DW_OP_call_frame_cfa
 162                         # DW_AT_GNU_all_call_sites
 163         .long   0x64    # DW_AT_sibling
 164         .uleb128 0x5    # (DIE (0x5a) DW_TAG_GNU_call_site)
 165         .long   .LVL0   # DW_AT_low_pc
 166                         # DW_AT_GNU_tail_call
 167         .long   0x25    # DW_AT_abstract_origin
 168         .byte   0       # end of children of DIE 0x41
 169         .uleb128 0x6    # (DIE (0x64) DW_TAG_subprogram)
 170         .long   .LASF0  # DW_AT_name: "foo_1"
 171         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 172         .byte   0x21    # DW_AT_decl_line
 173                         # DW_AT_prototyped
 174         .long   0x3a    # DW_AT_type
 175         .long   .LFB2   # DW_AT_low_pc
 176         .long   .LFE2-.LFB2     # DW_AT_high_pc
 177         .uleb128 0x1    # DW_AT_frame_base
 178         .byte   0x9c    # DW_OP_call_frame_cfa
 179                         # DW_AT_GNU_all_call_sites
 180         .long   0x87    # DW_AT_sibling
 181         .uleb128 0x5    # (DIE (0x7d) DW_TAG_GNU_call_site)
 182         .long   .LVL1   # DW_AT_low_pc
 183                         # DW_AT_GNU_tail_call
 184         .long   0x41    # DW_AT_abstract_origin
 185         .byte   0       # end of children of DIE 0x64
 186         .uleb128 0x4    # (DIE (0x87) DW_TAG_subprogram)
 187         .ascii "foo\0"  # DW_AT_name
 188         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 189         .byte   0x27    # DW_AT_decl_line
 190                         # DW_AT_prototyped
 191         .long   0x3a    # DW_AT_type
 192         .long   .LFB3   # DW_AT_low_pc
 193         .long   .LFE3-.LFB3     # DW_AT_high_pc
 194         .uleb128 0x1    # DW_AT_frame_base
 195         .byte   0x9c    # DW_OP_call_frame_cfa
 196                         # DW_AT_GNU_all_call_sites
 197         .long   0xaa    # DW_AT_sibling
 198         .uleb128 0x5    # (DIE (0xa0) DW_TAG_GNU_call_site)
 199         .long   .LVL2   # DW_AT_low_pc
 200                         # DW_AT_GNU_tail_call
 201         .long   0x64    # DW_AT_abstract_origin
 202         .byte   0       # end of children of DIE 0x87
 203         .uleb128 0x7    # (DIE (0xaa) DW_TAG_subprogram)
 204                         # DW_AT_external
 205         .long   .LASF5  # DW_AT_name: "main"
 206         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 207         .byte   0x2d    # DW_AT_decl_line
 208                         # DW_AT_prototyped
 209         .long   0x3a    # DW_AT_type
 210         .long   .LFB4   # DW_AT_low_pc
 211         .long   .LFE4-.LFB4     # DW_AT_high_pc
 212         .uleb128 0x1    # DW_AT_frame_base
 213         .byte   0x9c    # DW_OP_call_frame_cfa
 214                         # DW_AT_GNU_all_call_sites
 215         .uleb128 0x8    # (DIE (0xbf) DW_TAG_variable)
 216         .long   .LASF6  # DW_AT_name: "answer"
 217         .byte   0x1     # DW_AT_decl_file (tailcall-only.c)
 218         .byte   0x2f    # DW_AT_decl_line
 219         .long   0x3a    # DW_AT_type
 220         .long   .LLST0  # DW_AT_location
 221         .uleb128 0x9    # (DIE (0xce) DW_TAG_GNU_call_site)
 222         .long   .LVL3   # DW_AT_low_pc
 223         .long   0x87    # DW_AT_abstract_origin
 224         .byte   0       # end of children of DIE 0xaa
 225         .byte   0       # end of children of DIE 0xb
 226         .section        .debug_abbrev,"",@progbits
 227 .Ldebug_abbrev0:
 228         .uleb128 0x1    # (abbrev code)
 229         .uleb128 0x11   # (TAG: DW_TAG_compile_unit)
 230         .byte   0x1     # DW_children_yes
 231         .uleb128 0x25   # (DW_AT_producer)
 232         .uleb128 0xe    # (DW_FORM_strp)
 233         .uleb128 0x13   # (DW_AT_language)
 234         .uleb128 0xb    # (DW_FORM_data1)
 235         .uleb128 0x3    # (DW_AT_name)
 236         .uleb128 0xe    # (DW_FORM_strp)
 237         .uleb128 0x1b   # (DW_AT_comp_dir)
 238         .uleb128 0xe    # (DW_FORM_strp)
 239         .uleb128 0x55   # (DW_AT_ranges)
 240         .uleb128 0x17   # (DW_FORM_sec_offset)
 241         .uleb128 0x11   # (DW_AT_low_pc)
 242         .uleb128 0x1    # (DW_FORM_addr)
 243         .uleb128 0x10   # (DW_AT_stmt_list)
 244         .uleb128 0x17   # (DW_FORM_sec_offset)
 245         .byte   0
 246         .byte   0
 247         .uleb128 0x2    # (abbrev code)
 248         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 249         .byte   0       # DW_children_no
 250         .uleb128 0x3    # (DW_AT_name)
 251         .uleb128 0xe    # (DW_FORM_strp)
 252         .uleb128 0x3a   # (DW_AT_decl_file)
 253         .uleb128 0xb    # (DW_FORM_data1)
 254         .uleb128 0x3b   # (DW_AT_decl_line)
 255         .uleb128 0xb    # (DW_FORM_data1)
 256         .uleb128 0x27   # (DW_AT_prototyped)
 257         .uleb128 0x19   # (DW_FORM_flag_present)
 258         .uleb128 0x49   # (DW_AT_type)
 259         .uleb128 0x13   # (DW_FORM_ref4)
 260         .uleb128 0x11   # (DW_AT_low_pc)
 261         .uleb128 0x1    # (DW_FORM_addr)
 262         .uleb128 0x12   # (DW_AT_high_pc)
 263         .uleb128 0x6    # (DW_FORM_data4)
 264         .uleb128 0x40   # (DW_AT_frame_base)
 265         .uleb128 0x18   # (DW_FORM_exprloc)
 266         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 267         .uleb128 0x19   # (DW_FORM_flag_present)
 268         .byte   0
 269         .byte   0
 270         .uleb128 0x3    # (abbrev code)
 271         .uleb128 0x24   # (TAG: DW_TAG_base_type)
 272         .byte   0       # DW_children_no
 273         .uleb128 0xb    # (DW_AT_byte_size)
 274         .uleb128 0xb    # (DW_FORM_data1)
 275         .uleb128 0x3e   # (DW_AT_encoding)
 276         .uleb128 0xb    # (DW_FORM_data1)
 277         .uleb128 0x3    # (DW_AT_name)
 278         .uleb128 0x8    # (DW_FORM_string)
 279         .byte   0
 280         .byte   0
 281         .uleb128 0x4    # (abbrev code)
 282         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 283         .byte   0x1     # DW_children_yes
 284         .uleb128 0x3    # (DW_AT_name)
 285         .uleb128 0x8    # (DW_FORM_string)
 286         .uleb128 0x3a   # (DW_AT_decl_file)
 287         .uleb128 0xb    # (DW_FORM_data1)
 288         .uleb128 0x3b   # (DW_AT_decl_line)
 289         .uleb128 0xb    # (DW_FORM_data1)
 290         .uleb128 0x27   # (DW_AT_prototyped)
 291         .uleb128 0x19   # (DW_FORM_flag_present)
 292         .uleb128 0x49   # (DW_AT_type)
 293         .uleb128 0x13   # (DW_FORM_ref4)
 294         .uleb128 0x11   # (DW_AT_low_pc)
 295         .uleb128 0x1    # (DW_FORM_addr)
 296         .uleb128 0x12   # (DW_AT_high_pc)
 297         .uleb128 0x6    # (DW_FORM_data4)
 298         .uleb128 0x40   # (DW_AT_frame_base)
 299         .uleb128 0x18   # (DW_FORM_exprloc)
 300         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 301         .uleb128 0x19   # (DW_FORM_flag_present)
 302         .uleb128 0x1    # (DW_AT_sibling)
 303         .uleb128 0x13   # (DW_FORM_ref4)
 304         .byte   0
 305         .byte   0
 306         .uleb128 0x5    # (abbrev code)
 307         .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site)
 308         .byte   0       # DW_children_no
 309         .uleb128 0x11   # (DW_AT_low_pc)
 310         .uleb128 0x1    # (DW_FORM_addr)
 311         .uleb128 0x2115 # (DW_AT_GNU_tail_call)
 312         .uleb128 0x19   # (DW_FORM_flag_present)
 313         .uleb128 0x31   # (DW_AT_abstract_origin)
 314         .uleb128 0x13   # (DW_FORM_ref4)
 315         .byte   0
 316         .byte   0
 317         .uleb128 0x6    # (abbrev code)
 318         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 319         .byte   0x1     # DW_children_yes
 320         .uleb128 0x3    # (DW_AT_name)
 321         .uleb128 0xe    # (DW_FORM_strp)
 322         .uleb128 0x3a   # (DW_AT_decl_file)
 323         .uleb128 0xb    # (DW_FORM_data1)
 324         .uleb128 0x3b   # (DW_AT_decl_line)
 325         .uleb128 0xb    # (DW_FORM_data1)
 326         .uleb128 0x27   # (DW_AT_prototyped)
 327         .uleb128 0x19   # (DW_FORM_flag_present)
 328         .uleb128 0x49   # (DW_AT_type)
 329         .uleb128 0x13   # (DW_FORM_ref4)
 330         .uleb128 0x11   # (DW_AT_low_pc)
 331         .uleb128 0x1    # (DW_FORM_addr)
 332         .uleb128 0x12   # (DW_AT_high_pc)
 333         .uleb128 0x6    # (DW_FORM_data4)
 334         .uleb128 0x40   # (DW_AT_frame_base)
 335         .uleb128 0x18   # (DW_FORM_exprloc)
 336         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 337         .uleb128 0x19   # (DW_FORM_flag_present)
 338         .uleb128 0x1    # (DW_AT_sibling)
 339         .uleb128 0x13   # (DW_FORM_ref4)
 340         .byte   0
 341         .byte   0
 342         .uleb128 0x7    # (abbrev code)
 343         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 344         .byte   0x1     # DW_children_yes
 345         .uleb128 0x3f   # (DW_AT_external)
 346         .uleb128 0x19   # (DW_FORM_flag_present)
 347         .uleb128 0x3    # (DW_AT_name)
 348         .uleb128 0xe    # (DW_FORM_strp)
 349         .uleb128 0x3a   # (DW_AT_decl_file)
 350         .uleb128 0xb    # (DW_FORM_data1)
 351         .uleb128 0x3b   # (DW_AT_decl_line)
 352         .uleb128 0xb    # (DW_FORM_data1)
 353         .uleb128 0x27   # (DW_AT_prototyped)
 354         .uleb128 0x19   # (DW_FORM_flag_present)
 355         .uleb128 0x49   # (DW_AT_type)
 356         .uleb128 0x13   # (DW_FORM_ref4)
 357         .uleb128 0x11   # (DW_AT_low_pc)
 358         .uleb128 0x1    # (DW_FORM_addr)
 359         .uleb128 0x12   # (DW_AT_high_pc)
 360         .uleb128 0x6    # (DW_FORM_data4)
 361         .uleb128 0x40   # (DW_AT_frame_base)
 362         .uleb128 0x18   # (DW_FORM_exprloc)
 363         .uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
 364         .uleb128 0x19   # (DW_FORM_flag_present)
 365         .byte   0
 366         .byte   0
 367         .uleb128 0x8    # (abbrev code)
 368         .uleb128 0x34   # (TAG: DW_TAG_variable)
 369         .byte   0       # DW_children_no
 370         .uleb128 0x3    # (DW_AT_name)
 371         .uleb128 0xe    # (DW_FORM_strp)
 372         .uleb128 0x3a   # (DW_AT_decl_file)
 373         .uleb128 0xb    # (DW_FORM_data1)
 374         .uleb128 0x3b   # (DW_AT_decl_line)
 375         .uleb128 0xb    # (DW_FORM_data1)
 376         .uleb128 0x49   # (DW_AT_type)
 377         .uleb128 0x13   # (DW_FORM_ref4)
 378         .uleb128 0x2    # (DW_AT_location)
 379         .uleb128 0x17   # (DW_FORM_sec_offset)
 380         .byte   0
 381         .byte   0
 382         .uleb128 0x9    # (abbrev code)
 383         .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site)
 384         .byte   0       # DW_children_no
 385         .uleb128 0x11   # (DW_AT_low_pc)
 386         .uleb128 0x1    # (DW_FORM_addr)
 387         .uleb128 0x31   # (DW_AT_abstract_origin)
 388         .uleb128 0x13   # (DW_FORM_ref4)
 389         .byte   0
 390         .byte   0
 391         .byte   0
 392         .section        .debug_loc,"",@progbits
 393 .Ldebug_loc0:
 394 .LLST0:
 395         .long   .LVL3   # Location list begin address (*.LLST0)
 396         .long   .LVL4   # Location list end address (*.LLST0)
 397         .value  0x3     # Location expression size
 398         .byte   0x70    # DW_OP_breg0
 399         .sleb128 1
 400         .byte   0x9f    # DW_OP_stack_value
 401         .long   .LVL4   # Location list begin address (*.LLST0)
 402         .long   .LFE4   # Location list end address (*.LLST0)
 403         .value  0x1     # Location expression size
 404         .byte   0x50    # DW_OP_reg0
 405         .long   0       # Location list terminator begin (*.LLST0)
 406         .long   0       # Location list terminator end (*.LLST0)
 407         .section        .debug_aranges,"",@progbits
 408         .long   0x24    # Length of Address Ranges Info
 409         .value  0x2     # DWARF Version
 410         .long   .Ldebug_info0   # Offset of Compilation Unit Info
 411         .byte   0x4     # Size of Address
 412         .byte   0       # Size of Segment Descriptor
 413         .value  0       # Pad to 8 byte boundary
 414         .value  0
 415         .long   .Ltext0 # Address
 416         .long   .Letext0-.Ltext0        # Length
 417         .long   .LFB4   # Address
 418         .long   .LFE4-.LFB4     # Length
 419         .long   0
 420         .long   0
 421         .section        .debug_ranges,"",@progbits
 422 .Ldebug_ranges0:
 423         .long   .Ltext0 # Offset 0
 424         .long   .Letext0
 425         .long   .LFB4   # Offset 0x8
 426         .long   .LFE4
 427         .long   0
 428         .long   0
 429         .section        .debug_line,"",@progbits
 430 .Ldebug_line0:
 431         .section        .debug_str,"MS",@progbits,1
 432 .LASF4:
 433         .string "bar_1"
 434 .LASF2:
 435         .string "tailcall-only.c"
 436 .LASF1:
 437         .string "GNU C 4.8.3 20140911 (Red Hat 4.8.3-9) -m32 -march=i686 -g -O2"
 438 .LASF6:
 439         .string "answer"
 440 .LASF5:
 441         .string "main"
 442 .LASF3:
 443         .string ""
 444 .LASF0:
 445         .string "foo_1"
 446         .ident  "GCC: (GNU) 4.8.3 20140911 (Red Hat 4.8.3-9)"
 447         .section        .note.GNU-stack,"",@progbits