linux-user/loongarch64: Create init_main_thread

Merge init_thread and target_cpu_copy_regs.
There's no point going through a target_pt_regs intermediate.

Note that init_thread had set crmd in target_pt_regs, but
target_cpu_copy_regs did not copy to env.  This turns out to be
ok because loongarch_cpu_reset_hold initializes CRMD properly.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

2 files changed, 5 insertions, 15 deletions

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index a30431c7a2..0feccfbe91 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -533,14 +533,7 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *en
 
 #define VDSO_HEADER "vdso.c.inc"
 
-static inline void init_thread(struct target_pt_regs *regs,
-                               struct image_info *infop)
-{
-    /*Set crmd PG,DA = 1,0 */
-    regs->csr.crmd = 2 << 3;
-    regs->csr.era = infop->entry;
-    regs->regs[3] = infop->start_stack;
-}
+#define HAVE_INIT_MAIN_THREAD
 
 /* See linux kernel: arch/loongarch/include/asm/elf.h */
 #define ELF_NREG 45
diff --git a/linux-user/loongarch64/cpu_loop.c b/linux-user/loongarch64/cpu_loop.c
index ec8a06c88c..a0a4cbb7cc 100644
--- a/linux-user/loongarch64/cpu_loop.c
+++ b/linux-user/loongarch64/cpu_loop.c
@@ -120,13 +120,10 @@ void cpu_loop(CPULoongArchState *env)
     }
 }
 
-void target_cpu_copy_regs(CPUArchState *env, target_pt_regs *regs)
+void init_main_thread(CPUState *cs, struct image_info *info)
 {
-    int i;
-
-    for (i = 0; i < 32; i++) {
-        env->gpr[i] = regs->regs[i];
-    }
-    env->pc = regs->csr.era;
+    CPUArchState *env = cpu_env(cs);
 
+    env->pc = info->entry;
+    env->gpr[3] = info->start_stack;
 }