[v1] ARM AArch64 Support for BSD

[PATCH 03/23] Added function to clone CPU state

Posted by Ajeet Singh 5 months, 1 week ago

From: Stacey Son <sson@FreeBSD.org>

Function can copy cpu state to create new thread

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Ajeet Singh <itachis@FreeBSD.org>
---
 bsd-user/aarch64/target_arch_cpu.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/bsd-user/aarch64/target_arch_cpu.h b/bsd-user/aarch64/target_arch_cpu.h
index 1962d2c99b..4e950305d3 100644
--- a/bsd-user/aarch64/target_arch_cpu.h
+++ b/bsd-user/aarch64/target_arch_cpu.h
@@ -171,4 +171,21 @@ static inline void target_cpu_loop(CPUARMState *env)
     } /* for (;;) */
 }
 
+
+/* See arm64/arm64/vm_machdep.c cpu_fork() */
+static inline void target_cpu_clone_regs(CPUARMState *env, target_ulong newsp)
+{
+    if (newsp) {
+        env->xregs[31] = newsp;
+    }
+    env->regs[0] = 0;
+    env->regs[1] = 0;
+    pstate_write(env, 0);
+}
+
+static inline void target_cpu_reset(CPUArchState *env)
+{
+}
+
+
 #endif /* TARGET_ARCH_CPU_H */
-- 
2.34.1

Re: [PATCH 03/23] Added function to clone CPU state

Posted by Richard Henderson 5 months, 1 week ago

On 6/17/24 11:57, Ajeet Singh wrote:
> From: Stacey Son<sson@FreeBSD.org>
> 
> Function can copy cpu state to create new thread
> 
> Signed-off-by: Stacey Son<sson@FreeBSD.org>
> Signed-off-by: Ajeet Singh<itachis@FreeBSD.org>
> ---
>   bsd-user/aarch64/target_arch_cpu.h | 17 +++++++++++++++++
>   1 file changed, 17 insertions(+)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~