Changeset 11564 for trunk/source/lisp-kernel/x86-asmutils64.s

Timestamp:

Dec 31, 2008, 12:36:30 AM (12 years ago)

Author:

gb

Message:

Getting closer to the bug that I've been looking for (for > 2 weeks ...):
provide glue routines for sigreturn on Darwin. Note that sigreturn
is incorrectly prototyped on Darwin - it actually wants a second
('infostyle') argument. The little stub functions here exist solely
to provide the same value (0x1e) of that argument that sigtramp uses,
and to let the sigreturn() glue code deal with the syscall arcana.

File:

• trunk/source/lisp-kernel/x86-asmutils64.s (modified) (1 diff)

trunk/source/lisp-kernel/x86-asmutils64.s

@@ -169 +169 @@
 _exportfn(C(get_vector_registers))
 _endfn
+
+_exportfn(C(darwin_sigreturn))
+        .globl C(sigreturn)
+/* Need to set the sigreturn 'infostyle' argument, which is mostly
+   undocumented.  On x8664 Darwin, sigtramp() sets it to 0x1e, and
+   since we're trying to do what sigtramp() would do if we'd returned
+   to it ... */
+        __(movl $0x1e,%esi)
+        __(jmp C(sigreturn))
+_endfn            
 
 _exportfn(C(put_vector_registers))