/* Target-dependent code for GNU/Linux UltraSPARC.
- Copyright 2003, 2004 Free Software Foundation, Inc.
+ Copyright 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
Boston, MA 02111-1307, USA. */
#include "defs.h"
+#include "frame.h"
+#include "frame-unwind.h"
#include "gdbarch.h"
#include "osabi.h"
#include "solib-svr4.h"
+#include "symtab.h"
+#include "trad-frame.h"
+#include "tramp-frame.h"
#include "sparc64-tdep.h"
+/* Signal trampoline support. */
+
+static void sparc64_linux_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func);
+
+/* See sparc-linux-tdep.c for details. Note that 64-bit binaries only
+ use RT signals. */
+
+static const struct tramp_frame sparc64_linux_rt_sigframe =
+{
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x82102065, -1 }, /* mov __NR_rt_sigreturn, %g1 */
+ { 0x91d0206d, -1 }, /* ta 0x6d */
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ sparc64_linux_sigframe_init
+};
+
+static void
+sparc64_linux_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ CORE_ADDR base, addr;
+ int regnum;
+
+ base = frame_unwind_register_unsigned (next_frame, SPARC_O1_REGNUM);
+ base += 128;
+
+ /* Offsets from <bits/sigcontext.h>. */
+
+ /* Since %g0 is always zero, keep the identity encoding. */
+ addr = base + 8;
+ for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++)
+ {
+ trad_frame_set_reg_addr (this_cache, regnum, addr);
+ addr += 8;
+ }
+
+ trad_frame_set_reg_addr (this_cache, SPARC64_STATE_REGNUM, addr + 0);
+ trad_frame_set_reg_addr (this_cache, SPARC64_PC_REGNUM, addr + 8);
+ trad_frame_set_reg_addr (this_cache, SPARC64_NPC_REGNUM, addr + 16);
+ trad_frame_set_reg_addr (this_cache, SPARC64_Y_REGNUM, addr + 24);
+ trad_frame_set_reg_addr (this_cache, SPARC64_FPRS_REGNUM, addr + 28);
+
+ addr = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ if (addr & 1)
+ addr += BIAS;
+
+ base = addr;
+ for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
+ {
+ trad_frame_set_reg_addr (this_cache, regnum, addr);
+ addr += 8;
+ }
+ trad_frame_set_id (this_cache, frame_id_build (base, func));
+}
+\f
+
static void
sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- /* GNU/Linux is very similar to Solaris ... */
- sparc64_sol2_init_abi (info, gdbarch);
+ tramp_frame_prepend_unwinder (gdbarch, &sparc64_linux_rt_sigframe);
+
+ sparc64_init_abi (info, gdbarch);
+
+ /* GNU/Linux has SVR4-style shared libraries... */
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
- /* ... but doesn't have kernel-assisted single-stepping support. */
- set_gdbarch_software_single_step (gdbarch, sparc_software_single_step);
+ /* ...which means that we need some special handling when doing
+ prologue analysis. */
+ tdep->plt_entry_size = 16;
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
}
+\f
/* Provide a prototype to silence -Wmissing-prototypes. */
extern void _initialize_sparc64_linux_tdep (void);