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      1  1.1  christos /* Copyright 2018-2024 Free Software Foundation, Inc.
      2  1.1  christos 
      3  1.1  christos    This file is part of GDB.
      4  1.1  christos 
      5  1.1  christos    This program is free software; you can redistribute it and/or modify
      6  1.1  christos    it under the terms of the GNU General Public License as published by
      7  1.1  christos    the Free Software Foundation; either version 3 of the License, or
      8  1.1  christos    (at your option) any later version.
      9  1.1  christos 
     10  1.1  christos    This program is distributed in the hope that it will be useful,
     11  1.1  christos    but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  1.1  christos    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     13  1.1  christos    GNU General Public License for more details.
     14  1.1  christos 
     15  1.1  christos    You should have received a copy of the GNU General Public License
     16  1.1  christos    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
     17  1.1  christos 
     18  1.1  christos .section .note.GNU-stack,"",%progbits
     19  1.1  christos 
     20  1.1  christos .data
     21  1.1  christos value_callee:
     22  1.1  christos .quad 0x2021222324252627
     23  1.1  christos value_caller:
     24  1.1  christos .quad 0x1011121314151617
     25  1.1  christos 
     26  1.1  christos .text
     27  1.1  christos .global callee
     28  1.1  christos callee:
     29  1.1  christos 	/* Standard prologue:
     30  1.1  christos 	    - push fp (x29) and lr (x30) to the stack.
     31  1.1  christos 	    - mov sp to fp  */
     32  1.1  christos .cfi_startproc
     33  1.1  christos 	stp x29, x30, [sp, -16]!
     34  1.1  christos .cfi_def_cfa 29, 16
     35  1.1  christos .cfi_offset 29, -16
     36  1.1  christos .cfi_offset 30, -8
     37  1.1  christos 	mov x29, sp
     38  1.1  christos 
     39  1.1  christos 	/* Save caller's x19 value on the stack.  */
     40  1.1  christos .cfi_offset 19, -32
     41  1.1  christos 	str x19, [sp, -16]!
     42  1.1  christos 
     43  1.1  christos 	/* Put our own x19 value.  */
     44  1.1  christos 	adr x0, value_callee
     45  1.1  christos 	ldr x19, [x0]
     46  1.1  christos 
     47  1.1  christos break_here_asm:
     48  1.1  christos 
     49  1.1  christos 	/* Restore caller's x19 value.  */
     50  1.1  christos 	ldr x19, [sp], 16
     51  1.1  christos 
     52  1.1  christos 	/* Standard epilogue:
     53  1.1  christos 	    - pop fp (x29) and lr (x30) from the stack  */
     54  1.1  christos 	ldp x29, x30, [sp], 16
     55  1.1  christos 	ret
     56  1.1  christos .cfi_endproc
     57  1.1  christos 
     58  1.1  christos 
     59  1.1  christos .global caller
     60  1.1  christos caller:
     61  1.1  christos 	/* Standard prologue.  */
     62  1.1  christos .cfi_startproc
     63  1.1  christos 	stp x29, x30, [sp, -16]!
     64  1.1  christos .cfi_def_cfa 29, 16
     65  1.1  christos .cfi_offset x29, -16
     66  1.1  christos .cfi_offset x30, -8
     67  1.1  christos 	add x29, sp, 0
     68  1.1  christos 
     69  1.1  christos 	/* Put our own x19 value.  */
     70  1.1  christos 	adr x0, value_caller
     71  1.1  christos 	ldr x19, [x0]
     72  1.1  christos 
     73  1.1  christos 	/* Call callee.  */
     74  1.1  christos 	bl callee
     75  1.1  christos 
     76  1.1  christos 	/* Store our x19 value in x0 to return it.  */
     77  1.1  christos 	mov x0, x19
     78  1.1  christos 
     79  1.1  christos 	/* Standard epilogue.  */
     80  1.1  christos 	ldp x29, x30, [sp], 16
     81  1.1  christos 	ret
     82  1.1  christos .cfi_endproc
     83