The save_ptregs() function has not been tested or even built. I will need
help to complete this.
Signed-off-by: David VomLehn <dvomlehn@xxxxxxxxx>
---
arch/h8300/include/asm/ptrace.h | 64 +++++++++++++++++++++++++++++++++++++++
1 files changed, 64 insertions(+), 0 deletions(-)
diff --git a/arch/h8300/include/asm/ptrace.h b/arch/h8300/include/asm/ptrace.h
index d866c0e..09d6f3f 100644
--- a/arch/h8300/include/asm/ptrace.h
+++ b/arch/h8300/include/asm/ptrace.h
@@ -61,6 +61,70 @@ struct pt_regs {
#define instruction_pointer(regs) ((regs)->pc)
#define profile_pc(regs) instruction_pointer(regs)
extern void show_regs(struct pt_regs *);
+
+/* 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) "mov.l " #r ", %[" #name "]\n"
+#define PTREG_SAVE_ER(i) PTREG_SAVE_I(er, er, i)
+
+#define PTREG_OUT_ER(regs, i) PTREG_OUT_I(regs, er, er, 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(retpc, retpc)
+ PTREG_SAVE_ER(4)
+ PTREG_SAVE_ER(5)
+ PTREG_SAVE_ER(6)
+ PTREG_SAVE_ER(3)
+ PTREG_SAVE_ER(2)
+ PTREG_SAVE_ER(1)
+ PTREG_SAVE(orig_er0, orig_er0)
+ PTREG_SAVE(ccr, ccr)
+ PTREG_SAVE_ER(0)
+ PTREG_SAVE(vector, vector)
+#if defined(CONFIG_CPU_H8S)
+ PTREG_SAVE(exr, exr)
+#endif
+ "1:\n"
+ "mov.l #1b, er0\n"
+ PTREG_SAVE(er0, pc)
+ :
+ PTREG_OUT(regs, retpc, retpc)
+ PTREG_OUT(regs, 4)
+ PTREG_OUT(regs, 5)
+ PTREG_OUT(regs, 6)
+ PTREG_OUT(regs, 3)
+ PTREG_OUT(regs, 2)
+ PTREG_OUT(regs, 1)
+ PTREG_OUT(regs, orig_er0, orig_er0)
+ PTREG_OUT(regs, ccr, ccr)
+ PTREG_OUT(regs, 0)
+ PTREG_OUT(regs, vector, vector)
+#if defined(CONFIG_CPU_H8S)
+ PTREG_OUT(regs, exr, exr)
+#endif
+ PTREG_OUT(regs, pc, pc)
+ :
+ "er0"
+ );
+
+ return regs;
+}
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */
#endif /* _H8300_PTRACE_H */
--
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