fix risc-v init task gp(global pointer register) bug

2019-09-25 23:29:26 +08:00
parent b1b2d1eabc
commit 59c8e69af5
1 changed files with 2 additions and 2 deletions
--- a/arch/risc-v/common/tos_cpu.c
+++ b/arch/risc-v/common/tos_cpu.c
@@ -101,8 +101,8 @@ __KERNEL__ k_stack_t *cpu_task_stk_init(void *entry,
        #undef _V
    }

-    cpu_data_t gp = regs->gp;
-    asm("mv %0, gp"::"r"(gp));
+    cpu_data_t gp = 0;
+    __ASM__ __VOLATILE__ ("mv %0, gp":"=r"(gp));

    regs->gp        = (cpu_data_t)gp;                           // gp: global pointer
    regs->a0        = (cpu_data_t)arg;                          // a0: argument