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From: David VomLehn on 12 Apr 2010 02:10
The save_ptregs() function has not been tested or even built. I will need
help to complete this.

Signed-off-by: David VomLehn <dvomlehn(a)cisco.com>
---
arch/frv/include/asm/ptrace.h | 124 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 124 insertions(+), 0 deletions(-)

diff --git a/arch/frv/include/asm/ptrace.h b/arch/frv/include/asm/ptrace.h
index 6bfad4c..7365c6a 100644
--- a/arch/frv/include/asm/ptrace.h
+++ b/arch/frv/include/asm/ptrace.h
@@ -85,6 +85,130 @@ extern void show_regs(struct pt_regs *);

#define arch_has_single_step() (1)

+/* Macros for saving the contents of registers and for the output constraint
+ * for those registers */
+#include "/home/vomlehn/git/kernel.org/ptreg.h"
+#define PTREG_SAVE(r, name) "std " #r ", %[" # name "]\n"
+#define PTREG_SAVE_GR(i) PTREG_SAVE_I(gr, gr, i)
+
+#define PTREG_OUT_GR(regs, i) PTREG_OUT_I(regs, gr, r, i)
+
+#define arch_has_save_ptregs 1
+
+/**
+ * save_ptregs - save processor registers for backtracing
+ * @regs: Pointer to &struct pt_regs structure in which to save the
+ * registers
+ *
+ * Returns a constant pointer to @regs.
+ *
+ * This function must be called first in a function. There must be no
+ * auto variables defined that are initialized before calling this function.
+ */
+static __always_inline
+const struct pt_regs *save_ptregs(struct pt_regs *regs)
+{
+ __asm__ __volatile__ (
+ PTREG_SAVE(psr, psr)
+ PTREG_SAVE(isr, isr)
+ PTREG_SAVE(ccr, ccr)
+ PTREG_SAVE(cccr, cccr)
+ PTREG_SAVE(lr, lr)
+ PTREG_SAVE(lcr, lcr)
+ PTREG_SAVE(__status, __status)
+ PTREG_SAVE(syscallno, syscallno)
+ PTREG_SAVE(orig_gr8, orig_gr8)
+ PTREG_SAVE(gner0, gner0)
+ PTREG_SAVE(gner1, gner1)
+ PTREG_SAVE(iacc0, iacc0)
+ PTREG_SAVE(tbr, tbr)
+ PTREG_SAVE(sp, sp)
+ PTREG_SAVE(fp, fp)
+ PTREG_SAVE_GR(3)
+ PTREG_SAVE_GR(4)
+ PTREG_SAVE_GR(5)
+ PTREG_SAVE_GR(6)
+ PTREG_SAVE_GR(7)
+ PTREG_SAVE_GR(8)
+ PTREG_SAVE_GR(9)
+ PTREG_SAVE_GR(10)
+ PTREG_SAVE_GR(11)
+ PTREG_SAVE_GR(12)
+ PTREG_SAVE_GR(13)
+ PTREG_SAVE_GR(14)
+ PTREG_SAVE_GR(15)
+ PTREG_SAVE_GR(16)
+ PTREG_SAVE_GR(17)
+ PTREG_SAVE_GR(18)
+ PTREG_SAVE_GR(19)
+ PTREG_SAVE_GR(20)
+ PTREG_SAVE_GR(21)
+ PTREG_SAVE_GR(22)
+ PTREG_SAVE_GR(23)
+ PTREG_SAVE_GR(24)
+ PTREG_SAVE_GR(25)
+ PTREG_SAVE_GR(26)
+ PTREG_SAVE_GR(27)
+ PTREG_SAVE(next_frame, next_frame)
+ PTREG_SAVE_GR(29)
+ PTREG_SAVE_GR(30)
+ PTREG_SAVE_GR(31)
+ "1:\n"
+ "sethi.p #1b, gr0\n"
+ "setlo #1b, gr0\n"
+ PTREG_SAVE(gr0, pc)
+ :
+ PTREG_OUT(regs, psr, psr),
+ PTREG_OUT(regs, isr, isr),
+ PTREG_OUT(regs, ccr, ccr),
+ PTREG_OUT(regs, cccr, cccr),
+ PTREG_OUT(regs, lr, lr),
+ PTREG_OUT(regs, lcr, lcr),
+ PTREG_OUT(regs, pc, pc),
+ PTREG_OUT(regs, __status, __status),
+ PTREG_OUT(regs, syscallno, syscallno),
+ PTREG_OUT(regs, orig_gr8, orig_gr8),
+ PTREG_OUT(regs, gner0, gner0),
+ PTREG_OUT(regs, gner1, gner1),
+ PTREG_OUT(regs, iacc0, iacc0),
+ PTREG_OUT(regs, tbr, tbr),
+ PTREG_OUT(regs, sp, sp),
+ PTREG_OUT(regs, fp, fp),
+ PTREG_OUT_GR(regs, 3),
+ PTREG_OUT_GR(regs, 4),
+ PTREG_OUT_GR(regs, 5),
+ PTREG_OUT_GR(regs, 6),
+ PTREG_OUT_GR(regs, 7),
+ PTREG_OUT_GR(regs, 8),
+ PTREG_OUT_GR(regs, 9),
+ PTREG_OUT_GR(regs, 10),
+ PTREG_OUT_GR(regs, 11),
+ PTREG_OUT_GR(regs, 12),
+ PTREG_OUT_GR(regs, 13),
+ PTREG_OUT_GR(regs, 14),
+ PTREG_OUT_GR(regs, 15),
+ PTREG_OUT_GR(regs, 16),
+ PTREG_OUT_GR(regs, 17),
+ PTREG_OUT_GR(regs, 18),
+ PTREG_OUT_GR(regs, 19),
+ PTREG_OUT_GR(regs, 20),
+ PTREG_OUT_GR(regs, 21),
+ PTREG_OUT_GR(regs, 22),
+ PTREG_OUT_GR(regs, 23),
+ PTREG_OUT_GR(regs, 24),
+ PTREG_OUT_GR(regs, 25),
+ PTREG_OUT_GR(regs, 26),
+ PTREG_OUT_GR(regs, 27),
+ PTREG_OUT(regs, next_frame, next_frame),
+ PTREG_OUT_GR(regs, 29),
+ PTREG_OUT_GR(regs, 30),
+ PTREG_OUT_GR(regs, 31)
+ :
+ "gr0"
+ );
+
+ return regs;
+}
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_PTRACE_H */
--
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Prev: [PATCH - V2] Fix missing of last user while dumping slab corruption log
Next: [PATCH 17/23] Make register values available to S/390 panic notifiers