aboutsummaryrefslogtreecommitdiff
path: root/gdb/frv-linux-tdep.c
diff options
context:
space:
mode:
Diffstat (limited to 'gdb/frv-linux-tdep.c')
-rw-r--r--gdb/frv-linux-tdep.c94
1 files changed, 87 insertions, 7 deletions
diff --git a/gdb/frv-linux-tdep.c b/gdb/frv-linux-tdep.c
index e862625..b365915 100644
--- a/gdb/frv-linux-tdep.c
+++ b/gdb/frv-linux-tdep.c
@@ -26,6 +26,8 @@
#include "elf-bfd.h"
#include "elf/frv.h"
#include "frv-tdep.h"
+#include "trad-frame.h"
+#include "frame-unwind.h"
/* Define the size (in bytes) of an FR-V instruction. */
static const int frv_instr_size = 4;
@@ -151,7 +153,7 @@ frv_linux_pc_in_sigtramp (CORE_ADDR pc, char *name)
void *extension;
} __attribute__((aligned(8))); */
-static CORE_ADDR
+static LONGEST
frv_linux_sigcontext_reg_addr (struct frame_info *next_frame, int regno,
CORE_ADDR *sc_addr_cache_ptr)
{
@@ -233,15 +235,93 @@ frv_linux_sigcontext_reg_addr (struct frame_info *next_frame, int regno,
}
}
+/* Signal trampolines. */
+
+static struct trad_frame_cache *
+frv_linux_sigtramp_frame_cache (struct frame_info *next_frame, void **this_cache)
+{
+ struct trad_frame_cache *cache;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ CORE_ADDR addr;
+ char buf[4];
+ int regnum;
+ CORE_ADDR sc_addr_cache_val = 0;
+ struct frame_id this_id;
+
+ if (*this_cache)
+ return *this_cache;
+
+ cache = trad_frame_cache_zalloc (next_frame);
+
+ /* FIXME: cagney/2004-05-01: This is is long standing broken code.
+ The frame ID's code address should be the start-address of the
+ signal trampoline and not the current PC within that
+ trampoline. */
+ frame_unwind_register (next_frame, sp_regnum, buf);
+ this_id = frame_id_build (extract_unsigned_integer (buf, sizeof buf),
+ frame_pc_unwind (next_frame));
+ trad_frame_set_id (cache, this_id);
+
+ for (regnum = 0; regnum < frv_num_regs; regnum++)
+ {
+ LONGEST reg_addr = frv_linux_sigcontext_reg_addr (next_frame, regnum,
+ &sc_addr_cache_val);
+ if (reg_addr != -1)
+ trad_frame_set_reg_addr (cache, regnum, reg_addr);
+ }
+
+ *this_cache = cache;
+ return cache;
+}
+
+static void
+frv_linux_sigtramp_frame_this_id (struct frame_info *next_frame, void **this_cache,
+ struct frame_id *this_id)
+{
+ struct trad_frame_cache *cache =
+ frv_linux_sigtramp_frame_cache (next_frame, this_cache);
+ trad_frame_get_id (cache, this_id);
+}
+
+static void
+frv_linux_sigtramp_frame_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, void *valuep)
+{
+ /* Make sure we've initialized the cache. */
+ struct trad_frame_cache *cache =
+ frv_linux_sigtramp_frame_cache (next_frame, this_cache);
+ trad_frame_get_register (cache, next_frame, regnum, optimizedp, lvalp,
+ addrp, realnump, valuep);
+}
+
+static const struct frame_unwind frv_linux_sigtramp_frame_unwind =
+{
+ SIGTRAMP_FRAME,
+ frv_linux_sigtramp_frame_this_id,
+ frv_linux_sigtramp_frame_prev_register
+};
+
+static const struct frame_unwind *
+frv_linux_sigtramp_frame_sniffer (struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ char *name;
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
+ if (frv_linux_pc_in_sigtramp (pc, name))
+ return &frv_linux_sigtramp_frame_unwind;
+
+ return NULL;
+}
+
static void
frv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- /* When the FR-V Linux kernel calls a signal handler, the return
- address points to a bit of code on the stack. This function is
- used to identify this bit of code as a signal trampoline in order
- to support backtracing through calls to signal handlers. */
- set_gdbarch_deprecated_pc_in_sigtramp (gdbarch, frv_linux_pc_in_sigtramp);
- frv_set_sigcontext_reg_addr (gdbarch, frv_linux_sigcontext_reg_addr);
+ /* Set the sigtramp frame sniffer. */
+ frame_unwind_append_sniffer (gdbarch, frv_linux_sigtramp_frame_sniffer);
}
static enum gdb_osabi