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Diffstat (limited to 'gdb/gdbserver/linux-ppc-low.c')
-rw-r--r--gdb/gdbserver/linux-ppc-low.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/gdb/gdbserver/linux-ppc-low.c b/gdb/gdbserver/linux-ppc-low.c
index 7cb315a..2bb0f50 100644
--- a/gdb/gdbserver/linux-ppc-low.c
+++ b/gdb/gdbserver/linux-ppc-low.c
@@ -64,9 +64,53 @@ ppc_cannot_fetch_register (int regno)
return 0;
}
+static CORE_ADDR
+ppc_get_pc (void)
+{
+ unsigned long pc;
+
+ collect_register_by_name ("pc", &pc);
+ return (CORE_ADDR) pc;
+}
+
+static void
+ppc_set_pc (CORE_ADDR pc)
+{
+ unsigned long newpc = pc;
+
+ supply_register_by_name ("pc", &newpc);
+}
+
+/* Correct in either endianness. Note that this file is
+ for PowerPC only, not PowerPC64.
+ This instruction is "twge r2, r2", which GDB uses as a software
+ breakpoint. */
+static const unsigned long ppc_breakpoint = 0x7d821008;
+#define ppc_breakpoint_len 4
+
+static int
+ppc_breakpoint_at (CORE_ADDR where)
+{
+ unsigned long insn;
+
+ (*the_target->read_memory) (where, (char *) &insn, 4);
+ if (insn == ppc_breakpoint)
+ return 1;
+ /* If necessary, recognize more trap instructions here. GDB only uses the
+ one. */
+ return 0;
+}
+
struct linux_target_ops the_low_target = {
ppc_num_regs,
ppc_regmap,
ppc_cannot_fetch_register,
ppc_cannot_store_register,
+ ppc_get_pc,
+ ppc_set_pc,
+ (const char *) &ppc_breakpoint,
+ ppc_breakpoint_len,
+ NULL,
+ 0,
+ ppc_breakpoint_at,
};