On 6/17/24 11:57, Ajeet Singh wrote:
From: Stacey Son <s...@freebsd.org>

Initializes thread's register state

Signed-off-by: Stacey Son <s...@freebsd.org>
Signed-off-by: Ajeet Singh <itac...@freebsd.org>
Co-authored-by: Jessica Clarke <jrt...@jrtc27.com>
---
  bsd-user/aarch64/target_arch_thread.h | 16 ++++++++++++++++
  1 file changed, 16 insertions(+)

diff --git a/bsd-user/aarch64/target_arch_thread.h 
b/bsd-user/aarch64/target_arch_thread.h
index d2f2dea7ce..bfc9050cb1 100644
--- a/bsd-user/aarch64/target_arch_thread.h
+++ b/bsd-user/aarch64/target_arch_thread.h
@@ -42,4 +42,20 @@ static inline void target_thread_set_upcall(CPUARMState 
*regs, abi_ulong entry,
      pstate_write(regs, PSTATE_MODE_EL0t);
  }
+static inline void target_thread_init(struct target_pt_regs *regs,
+        struct image_info *infop)
+{
+    abi_long stack = infop->start_stack;
+
+    /*
+     * Make sure the stack is properly aligned.
+     * arm64/include/param.h (STACKLIGN() macro)
+     */
+
+    memset(regs, 0, sizeof(*regs));
+    regs->regs[0] = infop->start_stack;
+    regs->pc = infop->entry;
+    regs->sp = stack & ~(16 - 1);

ROUND_DOWN, otherwise,
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>


r~

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