diff options
| -rw-r--r-- | linux-user/host/x86_64/safe-syscall.inc.S | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/linux-user/host/x86_64/safe-syscall.inc.S b/linux-user/host/x86_64/safe-syscall.inc.S index dde434c8d7..e09368d450 100644 --- a/linux-user/host/x86_64/safe-syscall.inc.S +++ b/linux-user/host/x86_64/safe-syscall.inc.S @@ -24,6 +24,7 @@ * -1-and-errno-set convention is done by the calling wrapper. */ safe_syscall_base: + .cfi_startproc /* This saves a frame pointer and aligns the stack for the syscall. * (It's unclear if the syscall ABI has the same stack alignment * requirements as the userspace function call ABI, but better safe than @@ -31,6 +32,8 @@ safe_syscall_base: * does not list any ABI differences regarding stack alignment.) */ push %rbp + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset rbp, 0 /* The syscall calling convention isn't the same as the * C one: @@ -70,12 +73,19 @@ safe_syscall_start: safe_syscall_end: /* code path for having successfully executed the syscall */ pop %rbp + .cfi_remember_state + .cfi_def_cfa_offset 8 + .cfi_restore rbp ret return_ERESTARTSYS: /* code path when we didn't execute the syscall */ + .cfi_restore_state mov $-TARGET_ERESTARTSYS, %rax pop %rbp + .cfi_def_cfa_offset 8 + .cfi_restore rbp ret + .cfi_endproc .size safe_syscall_base, .-safe_syscall_base |