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accel/tcg: Provide a NetBSD specific aarch64 cpu_signal_handler

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Fix qemu build on NetBSD/evbarm-aarch64 by providing a NetBSD specific
cpu_signal_handler.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Nick Hudson <skrll@netbsd.org>
Message-Id: <20200517101529.5367-1-skrll@netbsd.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Nick Hudson 2020-05-17 11:15:29 +01:00 committed by Richard Henderson
parent 853d9a4be8
commit 71b04329c4
1 changed files with 27 additions and 0 deletions
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27
accel/tcg/user-exec.c
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@ -558,6 +558,32 @@ int cpu_signal_handler(int host_signum, void *pinfo,
#elif defined(__aarch64__)
#if defined(__NetBSD__)
#include <ucontext.h>
#include <sys/siginfo.h>
int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
{
ucontext_t *uc = puc;
siginfo_t *si = pinfo;
unsigned long pc;
int is_write;
uint32_t esr;
pc = uc->uc_mcontext.__gregs[_REG_PC];
esr = si->si_trap;
/*
* siginfo_t::si_trap is the ESR value, for data aborts ESR.EC
* is 0b10010x: then bit 6 is the WnR bit
*/
is_write = extract32(esr, 27, 5) == 0x12 && extract32(esr, 6, 1) == 1;
return handle_cpu_signal(pc, si, is_write, &uc->uc_sigmask);
}
#else
#ifndef ESR_MAGIC
/* Pre-3.16 kernel headers don't have these, so provide fallback definitions */
#define ESR_MAGIC 0x45535201
@ -620,6 +646,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
}
return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
}
#endif
#elif defined(__s390__)