/* Copyright 2009-2024 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . This file is part of the gdb testsuite. It tests displaced stepping over various insns that require special handling. */ .text .global main main: nop callq setup_signal_handler nop /***********************************************/ /* test call/ret */ .global test_call test_call: call test_call_subr nop .global test_ret_end test_ret_end: nop /***********************************************/ /* test abs-jmp/rep-ret */ test_abs_jmp_setup: mov $test_abs_jmp_return,%rdx push %rdx mov $test_abs_jmp_subr,%rdx .global test_abs_jmp test_abs_jmp: jmp *%rdx test_abs_jmp_return: nop .global test_rep_ret_end test_rep_ret_end: nop /***********************************************/ /* test syscall */ .global test_syscall mov $0x27,%eax /* getpid */ test_syscall: syscall nop test_syscall_end: nop /***********************************************/ /* Test stepping over int3. The prefixes are pointless, but it's possible, so we exercise it. */ nop .global test_int3 test_int3: repz repz int3 nop .global test_int3_end test_int3_end: nop /***********************************************/ /* test rip-relative GDB picks a spare register to hold the rip-relative address. Exercise all the possibilities (rax-rdi, sans rsp). */ .global test_rip_rax test_rip_rax: add answer(%rip),%rax .global test_rip_rax_end test_rip_rax_end: nop .global test_rip_rbx test_rip_rbx: add answer(%rip),%rbx .global test_rip_rbx_end test_rip_rbx_end: nop .global test_rip_rcx test_rip_rcx: add answer(%rip),%rcx .global test_rip_rcx_end test_rip_rcx_end: nop .global test_rip_rdx test_rip_rdx: add answer(%rip),%rdx .global test_rip_rdx_end test_rip_rdx_end: nop .global test_rip_rbp test_rip_rbp: add answer(%rip),%rbp .global test_rip_rbp_end test_rip_rbp_end: nop .global test_rip_rsi test_rip_rsi: add answer(%rip),%rsi .global test_rip_rsi_end test_rip_rsi_end: nop .global test_rip_rdi test_rip_rdi: add answer(%rip),%rdi .global test_rip_rdi_end test_rip_rdi_end: nop .global test_jmp test_jmp: jmpq *jmp_dest(%rip) nop .global test_jmp_end test_jmp_end: nop /* skip over test data */ jmp done /* test rip-relative data */ answer: .8byte 42 jmp_dest: .8byte test_jmp_end /***********************************************/ /* all done */ done: mov $0,%rdi call exit hlt /***********************************************/ /* subroutine to help test call/ret */ test_call_subr: nop .global test_call_end test_call_end: nop .global test_ret test_ret: ret /***********************************************/ /* subroutine to help test abs-jmp/rep-ret */ test_abs_jmp_subr: nop .global test_abs_jmp_end test_abs_jmp_end: nop .global test_rep_ret test_rep_ret: repz ret .section .note.GNU-stack,"",@progbits