zcontext 修正 fpu 问题。

microcai · Jan 6, 2025 · 2eacc06 · 2eacc06
1 parent a8eba13
commit 2eacc06
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/uasync/zcontext_asm/zcontext_x86_64.S b/uasync/zcontext_asm/zcontext_x86_64.S
@@ -171,10 +171,17 @@ zcontext_swap: // zcontext_swap(zcontext_t* from, zcontext_t* to, swap_hook_func
     // 返回
     ret
 
+
 .align 16
 .global zcontext_entry_point
 .section .text.zcontext_entry_point, "x"
+default_mmx_ctl:
+    .int 0x1f80
+default_fpu_ctl:
+    .int 0x37f
 zcontext_entry_point:
+    ldmxcsr -0xf(%rip)
+    fldcw -0x11(%rip)
     pop %rbx
     pop ARG1_REG
     mov %rax, ARG2_REG
@@ -217,3 +224,6 @@ zcontext_swap_preserve_none: // zcontext_swap2(zcontext_t* from, zcontext_t* to,
     pop NONE_PRESERVE_ARG3_REG ; // pop+jump = ret !
 1:
     jmp * NONE_PRESERVE_ARG3_REG // tail call optimization
+
+
+.section .note.GNU-stack,"",%progbits