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linux-user/signal: Drop HOST_SIGNAL_PLACEHOLDER 

Now that all of the linux-user hosts have been converted
to host-signal.h, drop the compatibility code.

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 2021-09-17 12:00:31 -07:00
parent 4f3bbd9cfb
commit 04de121aaf
2 changed files with 0 additions and 26 deletions
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12
include/exec/exec-all.h
View File

@ -685,18 +685,6 @@ MMUAccessType adjust_signal_pc(uintptr_t *pc, bool is_write);
bool handle_sigsegv_accerr_write(CPUState *cpu, sigset_t *old_set,
uintptr_t host_pc, abi_ptr guest_addr);
/**
* cpu_signal_handler
* @signum: host signal number
* @pinfo: host siginfo_t
* @puc: host ucontext_t
*
* To be called from the SIGBUS and SIGSEGV signal handler to inform the
* virtual cpu of exceptions. Returns true if the signal was handled by
* the virtual CPU.
*/
int cpu_signal_handler(int signum, void *pinfo, void *puc);
#else
static inline void mmap_lock(void) {}
static inline void mmap_unlock(void) {}

14
linux-user/signal.c
View File

@ -780,17 +780,6 @@ static void host_signal_handler(int host_sig, siginfo_t *info, void *puc)
ucontext_t *uc = puc;
struct emulated_sigtable *k;
int guest_sig;
#ifdef HOST_SIGNAL_PLACEHOLDER
/* the CPU emulator uses some host signals to detect exceptions,
we forward to it some signals */
if ((host_sig == SIGSEGV || host_sig == SIGBUS)
&& info->si_code > 0) {
if (cpu_signal_handler(host_sig, info, puc)) {
return;
}
}
#else
uintptr_t pc = 0;
bool sync_sig = false;
@ -850,7 +839,6 @@ static void host_signal_handler(int host_sig, siginfo_t *info, void *puc)
sync_sig = true;
}
#endif
/* get target signal number */
guest_sig = host_to_target_signal(host_sig);
@ -865,7 +853,6 @@ static void host_signal_handler(int host_sig, siginfo_t *info, void *puc)
k->pending = guest_sig;
ts->signal_pending = 1;
#ifndef HOST_SIGNAL_PLACEHOLDER
/*
* For synchronous signals, unwind the cpu state to the faulting
* insn and then exit back to the main loop so that the signal
@ -875,7 +862,6 @@ static void host_signal_handler(int host_sig, siginfo_t *info, void *puc)
cpu->exception_index = EXCP_INTERRUPT;
cpu_loop_exit_restore(cpu, pc);
}
#endif
rewind_if_in_safe_syscall(puc);