Author: Armin Rigo <ar...@tunes.org>
Branch:
Changeset: r74648:472f5815b5e2
Date: 2014-11-23 10:55 +0100
http://bitbucket.org/pypy/pypy/changeset/472f5815b5e2/
Log: fix comments
diff --git a/rpython/jit/backend/x86/assembler.py
b/rpython/jit/backend/x86/assembler.py
--- a/rpython/jit/backend/x86/assembler.py
+++ b/rpython/jit/backend/x86/assembler.py
@@ -1832,15 +1832,17 @@
offset = self.cpu.get_ofs_of_frame_field('jf_guard_exc')
mc.MOV_br(offset, ebx.value)
- # now we return from the complete frame, which starts from
- # _call_header_with_stack_check(). The LEA in _call_footer below
- # throws away most of the frame, including all the PUSHes that we
- # did just above.
+ # fill in the jf_descr and jf_gcmap fields of the frame according
+ # to which failure we are resuming from. These are constants
+ # pushed on the stack just before we jump to the current helper,
+ # in generate_quick_failure().
ofs = self.cpu.get_ofs_of_frame_field('jf_descr')
ofs2 = self.cpu.get_ofs_of_frame_field('jf_gcmap')
mc.POP_b(ofs2)
mc.POP_b(ofs)
+ # now we return from the complete frame, which starts from
+ # _call_header_with_stack_check(). The _call_footer below does it.
self._call_footer()
rawstart = mc.materialize(self.cpu.asmmemmgr, [])
self.failure_recovery_code[exc + 2 * withfloats] = rawstart
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