diff options
| -rw-r--r-- | src/cpu/x86/sipi_vector.S | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/cpu/x86/sipi_vector.S b/src/cpu/x86/sipi_vector.S index b40ea76f76..bd60c65a88 100644 --- a/src/cpu/x86/sipi_vector.S +++ b/src/cpu/x86/sipi_vector.S @@ -114,6 +114,8 @@ _start: movl stack_top, %edx subl %eax, %edx mov %edx, %esp + andl $0xfffffff0, %esp /* ensure stack alignment */ + /* Save CPU number. */ mov %ecx, %esi @@ -192,7 +194,8 @@ load_msr: mov %eax, %cr4 #endif - /* c_handler(cpu_num) */ + /* c_handler(cpu_num), preserve proper stack alignment */ + sub $12, %esp push %esi /* cpu_num */ mov c_handler, %eax call *%eax |