diff options
Diffstat (limited to 'src/arch/x86/c_start.S')
| -rw-r--r-- | src/arch/x86/c_start.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/arch/x86/c_start.S b/src/arch/x86/c_start.S index 43d78020e1..bd99c21c91 100644 --- a/src/arch/x86/c_start.S +++ b/src/arch/x86/c_start.S @@ -60,6 +60,14 @@ _start: cld +#ifdef __x86_64__ + mov %rdi, _cbmem_top_ptr +#else + /* The return argument is at 0(%esp), the calling argument at 4(%esp) */ + movl 4(%esp), %eax + movl %eax, _cbmem_top_ptr +#endif + /** poison the stack. Code should not count on the * stack being full of zeros. This stack poisoning * recently uncovered a bug in the broadcast SIPI |