gdb/testsuite/gdb.arch/riscv-unwind-long-insn.S

   1 /* Copyright 2019-2024 Free Software Foundation, Inc.
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; either version 3 of the License, or
   6    (at your option) any later version.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11    GNU General Public License for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  15
  16         .option nopic
  17         .text
  18
  19         .align  1
  20         .globl  bar
  21         .type   bar, @function
  22 bar:
  23         tail       1f
  24         .size   bar, .-func
  25
  26         .align  1
  27         .globl  func
  28         .type   func, @function
  29 func:
  30         /* A fake instruction of either 6 or 8 bytes.  This is never
  31            executed, but the prologue scanner will try to decode it.
  32            These long instructions are ISA extensions, use .byte rather
  33            than an actual instruction mnemonic so that the test can be
  34            compiled with a toolchain that doesn't include any long
  35            instruction extensions.  */
  36 #if BAD_INSN_LEN == 6
  37         /* A fake 6 byte instruction.  */
  38         .byte 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00
  39 #elif BAD_INSN_LEN == 8
  40         /* A fake 8 byte instruction.  */
  41         .byte 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  42 #else
  43 #error unexpected bad instruction length
  44 #endif
  45
  46 1:
  47         addi    sp,sp,-16
  48 #if __SIZEOF_POINTER__ == 8
  49         sd      s0,8(sp)
  50 #else
  51         sw      s0,8(sp)
  52 #endif
  53         addi    s0,sp,16
  54         nop
  55 #if __SIZEOF_POINTER__ == 8
  56         ld      s0,8(sp)
  57 #else
  58         lw      s0,8(sp)
  59 #endif
  60         addi    sp,sp,16
  61         jr      ra
  62         .size   func, .-func
  63         .section        .note.GNU-stack,"",@progbits