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[v2,10/40] bsd-user/signal.c: Implement cpu_loop_exit_sigsegv

Message ID 20220125012947.14974-11-imp@bsdimp.com
State New
Headers show
Series bsd-user: upstream our signal implementation | expand

Commit Message

Warner Losh Jan. 25, 2022, 1:29 a.m. UTC 
First attempt at implementing cpu_loop_exit_sigsegv, mostly copied from
linux-user version of this function.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Kyle Evans <kevans@freebsd.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 bsd-user/signal.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/bsd-user/signal.c b/bsd-user/signal.c
index 1206d0d728c..12de0e2dea4 100644
--- a/bsd-user/signal.c
+++ b/bsd-user/signal.c
@@ -20,6 +20,7 @@ 
 #include "qemu/osdep.h"
 #include "qemu.h"
 #include "signal-common.h"
+#include "hw/core/tcg-cpu-ops.h"
 
 /*
  * Stubbed out routines until we merge signal support from bsd-user
@@ -63,9 +64,17 @@  void process_pending_signals(CPUArchState *cpu_env)
 void cpu_loop_exit_sigsegv(CPUState *cpu, target_ulong addr,
                            MMUAccessType access_type, bool maperr, uintptr_t ra)
 {
-    qemu_log_mask(LOG_UNIMP, "No signal support for SIGSEGV\n");
-    /* unreachable */
-    abort();
+    const struct TCGCPUOps *tcg_ops = CPU_GET_CLASS(cpu)->tcg_ops;
+
+    if (tcg_ops->record_sigsegv) {
+        tcg_ops->record_sigsegv(cpu, addr, access_type, maperr, ra);
+    }
+
+    force_sig_fault(TARGET_SIGSEGV,
+                    maperr ? TARGET_SEGV_MAPERR : TARGET_SEGV_ACCERR,
+                    addr);
+    cpu->exception_index = EXCP_INTERRUPT;
+    cpu_loop_exit_restore(cpu, ra);
 }
 
 void cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr,