When attempting to emulate the following instructions:
mov rax, 0x10005
mov dr7, rax
a crash occurs in the Unicorn emulator. This is due to the cpu_x86_update_dr7_x86_64 function calling cpu_breakpoint_insert_x86_64, which then triggers tb_flush_sparc64. The latter performs a TCG region reset (via tcg_region_reset_all_x86_64), effectively wiping the emulation region.
As a result, when cpu_x86_update_dr7_x86_64 returns, it attempts to exit into a now-cleared region, causing the crash.
When attempting to emulate the following instructions:
a crash occurs in the Unicorn emulator. This is due to the
cpu_x86_update_dr7_x86_64function callingcpu_breakpoint_insert_x86_64, which then triggerstb_flush_sparc64. The latter performs a TCG region reset (viatcg_region_reset_all_x86_64), effectively wiping the emulation region.As a result, when
cpu_x86_update_dr7_x86_64returns, it attempts to exit into a now-cleared region, causing the crash.