From: Stacey Son <s...@freebsd.org>
Function checks the processor state to ensure that the current
execution mode is EL0 and no flags indicating interrupts or
exceptions are set
Signed-off-by: Stacey Son <s...@freebsd.org>
Signed-off-by: Ajeet Singh <itac...@freebsd.org>
---
bsd-user/aarch64/signal.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/bsd-user/aarch64/signal.c b/bsd-user/aarch64/signal.c
index 13faac8ce6..ad81531ec5 100644
--- a/bsd-user/aarch64/signal.c
+++ b/bsd-user/aarch64/signal.c
@@ -117,3 +117,21 @@ abi_long set_mcontext(CPUARMState *regs, target_mcontext_t
*mcp, int srflag)
return err;
}
+
+/* Compare to sys_sigreturn() in arm64/arm64/machdep.c */
+abi_long get_ucontext_sigreturn(CPUARMState *regs, abi_ulong target_sf,
+ abi_ulong *target_uc)
+{
+ uint32_t pstate = pstate_read(regs);
+
+ *target_uc = 0;
+
+ if ((pstate & PSTATE_M) != PSTATE_MODE_EL0t ||
+ (pstate & (PSTATE_F | PSTATE_I | PSTATE_A | PSTATE_D)) != 0) {
+ return -TARGET_EINVAL;
+ }
+
+ *target_uc = target_sf;
+
+ return 0;
+}
--
2.34.1
