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linux-user: Add cpu_loop_exit_sigbus

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This is a new interface to be provided by the os emulator for
raising SIGBUS on fault.  Use the new record_sigbus target hook.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-10-04 10:06:10 -07:00
parent 644a9fece4
commit 12ed56407e
2 changed files with 28 additions and 0 deletions
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14
include/exec/exec-all.h
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@ -700,6 +700,20 @@ void QEMU_NORETURN cpu_loop_exit_sigsegv(CPUState *cpu, target_ulong addr,
MMUAccessType access_type,
bool maperr, uintptr_t ra);
/**
* cpu_loop_exit_sigbus:
* @cpu: the cpu context
* @addr: the guest address of the alignment fault
* @access_type: access was read/write/execute
* @ra: host pc for unwinding
*
* Use the TCGCPUOps hook to record cpu state, do guest operating system
* specific things to raise SIGBUS, and jump to the main cpu loop.
*/
void QEMU_NORETURN cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr,
MMUAccessType access_type,
uintptr_t ra);
#else
static inline void mmap_lock(void) {}
static inline void mmap_unlock(void) {}