linux-user/mips: 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 cp0_status in target_pt_regs, but
target_cpu_copy_regs did not copy to env.  This turns out to be
ok because mips_cpu_reset_hold initializes CP0_Status properly.

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

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 0feccfbe9166ce2625213d838b9a28dd4c3dbfc3..ac96755b06c6404b9866595d8778bad6f83a1f3e 100644 (file)
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -581,13 +581,7 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs,
 #define elf_check_abi(x) (!((x) & EF_MIPS_ABI2))
 #endif
 
-static inline void init_thread(struct target_pt_regs *regs,
-                               struct image_info *infop)
-{
-    regs->cp0_status = 2 << CP0St_KSU;
-    regs->cp0_epc = infop->entry;
-    regs->regs[29] = infop->start_stack;
-}
+#define HAVE_INIT_MAIN_THREAD
 
 /* See linux kernel: arch/mips/include/asm/elf.h.  */
 #define ELF_NREG 45

diff --git a/linux-user/mips/cpu_loop.c b/linux-user/mips/cpu_loop.c
index 6405806eb026783ddbbed035179fc032e97f686c..e67b8a2e46320179ef908e55ef4950e847064c8b 100644 (file)
--- a/linux-user/mips/cpu_loop.c
+++ b/linux-user/mips/cpu_loop.c
@@ -211,12 +211,9 @@ done_syscall:
     }
 }
 
-void target_cpu_copy_regs(CPUArchState *env, target_pt_regs *regs)
+void init_main_thread(CPUState *cs, struct image_info *info)
 {
-    CPUState *cpu = env_cpu(env);
-    TaskState *ts = get_task_state(cpu);
-    struct image_info *info = ts->info;
-    int i;
+    CPUArchState *env = cpu_env(cs);
 
     struct mode_req {
         bool single;
@@ -245,12 +242,11 @@ void target_cpu_copy_regs(CPUArchState *env, target_pt_regs *regs)
 
     struct mode_req prog_req;
     struct mode_req interp_req;
+    target_ulong entry = info->entry;
 
-    for(i = 0; i < 32; i++) {
-        env->active_tc.gpr[i] = regs->regs[i];
-    }
-    env->active_tc.PC = regs->cp0_epc & ~(target_ulong)1;
-    if (regs->cp0_epc & 1) {
+    env->active_tc.gpr[29] = info->start_stack;
+    env->active_tc.PC = entry & ~(target_ulong)1;
+    if (entry & 1) {
         env->hflags |= MIPS_HFLAG_M16;
     }