* [Bug translator/9810] New: ia64 REG_IP() cannot be used as a lvalue
@ 2009-02-04 1:08 wcohen at redhat dot com
2009-02-04 2:17 ` [Bug translator/9810] " fche at redhat dot com
0 siblings, 1 reply; 2+ messages in thread
From: wcohen at redhat dot com @ 2009-02-04 1:08 UTC (permalink / raw)
To: systemtap
The ia64 REG_IP() for the ia64 takes a couple register values to synthesize a
value for the instruction pointer in runtime/regs.h:
#define REG_IP(regs) ((regs)->cr_iip +ia64_psr(regs)->ri)
However, the translator generates code like the following that uses REG_IP as an
lvalue for begin and end probes:
#ifdef STP_NEED_UNWIND_DATA
memset (& c->regs_buffer, 0, sizeof (c->regs_buffer));
REG_IP((& c->regs_buffer)) = (unsigned long)__builtin_return_address (0);
REG_SP((& c->regs_buffer)) = (unsigned long)& c;
c->regs = & c->regs_buffer;
#endif
This causes the following tests to fail on ia64:
systemtap.examples/interrupt/scf
systemtap.examples/io/io_submit
buildok/context_test.stp
The ri (restart instruction) points to which instruction in a bundle to restart
execution at. The ri field is part of the program status register (psr).
--
Summary: ia64 REG_IP() cannot be used as a lvalue
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: wcohen at redhat dot com
GCC host triplet: ia64
http://sourceware.org/bugzilla/show_bug.cgi?id=9810
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* [Bug translator/9810] ia64 REG_IP() cannot be used as a lvalue
2009-02-04 1:08 [Bug translator/9810] New: ia64 REG_IP() cannot be used as a lvalue wcohen at redhat dot com
@ 2009-02-04 2:17 ` fche at redhat dot com
0 siblings, 0 replies; 2+ messages in thread
From: fche at redhat dot com @ 2009-02-04 2:17 UTC (permalink / raw)
To: systemtap
------- Additional Comments From fche at redhat dot com 2009-02-03 20:31 -------
I will revert this code, which is being mooted for bug #6961 anyway.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|systemtap at sources dot |fche at redhat dot com
|redhat dot com |
Status|NEW |ASSIGNED
http://sourceware.org/bugzilla/show_bug.cgi?id=9810
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2009-02-04 1:08 [Bug translator/9810] New: ia64 REG_IP() cannot be used as a lvalue wcohen at redhat dot com
2009-02-04 2:17 ` [Bug translator/9810] " fche at redhat dot com
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