/* Motorola m68k target-dependent support for GNU/Linux.
- Copyright (C) 1996, 1998, 2000, 2001, 2002, 2003, 2004, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 1996-2016 Free Software Foundation, Inc.
This file is part of GDB.
#include "floatformat.h"
#include "frame.h"
#include "target.h"
-#include "gdb_string.h"
#include "gdbtypes.h"
#include "osabi.h"
#include "regcache.h"
#include "auxv.h"
#include "observer.h"
#include "elf/common.h"
+#include "linux-tdep.h"
+#include "regset.h"
\f
/* Offsets (in target ints) into jmp_buf. */
static int
m68k_linux_pc_in_sigtramp (struct frame_info *this_frame)
{
- CORE_ADDR sp;
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte buf[12];
unsigned long insn0, insn1, insn2;
CORE_ADDR pc = get_frame_pc (this_frame);
if (!safe_frame_unwind_memory (this_frame, pc - 4, buf, sizeof (buf)))
return 0;
- insn1 = extract_unsigned_integer (buf + 4, 4);
- insn2 = extract_unsigned_integer (buf + 8, 4);
+ insn1 = extract_unsigned_integer (buf + 4, 4, byte_order);
+ insn2 = extract_unsigned_integer (buf + 8, 4, byte_order);
if (IS_SIGTRAMP (insn1, insn2))
return 1;
if (IS_RT_SIGTRAMP (insn1, insn2))
return 2;
- insn0 = extract_unsigned_integer (buf, 4);
+ insn0 = extract_unsigned_integer (buf, 4, byte_order);
if (IS_SIGTRAMP (insn0, insn1))
return 1;
if (IS_RT_SIGTRAMP (insn0, insn1))
static struct m68k_linux_sigtramp_info
m68k_linux_get_sigtramp_info (struct frame_info *this_frame)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR sp;
struct m68k_linux_sigtramp_info info;
+ /* Determine whether we are running on a uClinux or normal GNU/Linux
+ target so we can use the correct sigcontext layouts. */
if (target_is_uclinux == -1)
- {
- /* Determine whether we are running on a uClinux or normal GNU/Linux
- target so we can use the correct sigcontext layouts. */
- CORE_ADDR dummy;
-
- target_is_uclinux
- = (target_auxv_search (¤t_target, AT_NULL, &dummy) > 0
- && target_auxv_search (¤t_target, AT_PAGESZ, &dummy) == 0);
- }
+ target_is_uclinux = linux_is_uclinux ();
sp = get_frame_register_unsigned (this_frame, M68K_SP_REGNUM);
/* Get sigcontext address, it is the third parameter on the stack. */
- info.sigcontext_addr = read_memory_unsigned_integer (sp + 8, 4);
+ info.sigcontext_addr = read_memory_unsigned_integer (sp + 8, 4, byte_order);
if (m68k_linux_pc_in_sigtramp (this_frame) == 2)
info.sc_reg_offset = m68k_linux_ucontext_reg_offset;
{
struct frame_id this_id;
struct trad_frame_cache *cache;
- struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct m68k_linux_sigtramp_info info;
gdb_byte buf[4];
int i;
if (*this_cache)
- return *this_cache;
+ return (struct trad_frame_cache *) *this_cache;
cache = trad_frame_cache_zalloc (this_frame);
trampoline. */
get_frame_register (this_frame, M68K_SP_REGNUM, buf);
/* See the end of m68k_push_dummy_call. */
- this_id = frame_id_build (extract_unsigned_integer (buf, 4) - 4 + 8,
- get_frame_pc (this_frame));
+ this_id = frame_id_build (extract_unsigned_integer (buf, 4, byte_order)
+ - 4 + 8, get_frame_pc (this_frame));
trad_frame_set_id (cache, this_id);
info = m68k_linux_get_sigtramp_info (this_frame);
static const struct frame_unwind m68k_linux_sigtramp_frame_unwind =
{
SIGTRAMP_FRAME,
+ default_frame_unwind_stop_reason,
m68k_linux_sigtramp_frame_this_id,
m68k_linux_sigtramp_frame_prev_register,
NULL,
m68k_linux_sigtramp_frame_sniffer
};
+/* Register maps for supply/collect regset functions. */
+
+static const struct regcache_map_entry m68k_linux_gregmap[] =
+ {
+ { 7, M68K_D1_REGNUM, 4 }, /* d1 ... d7 */
+ { 7, M68K_A0_REGNUM, 4 }, /* a0 ... a6 */
+ { 1, M68K_D0_REGNUM, 4 },
+ { 1, M68K_SP_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 4 }, /* orig_d0 (skip) */
+ { 1, M68K_PS_REGNUM, 4 },
+ { 1, M68K_PC_REGNUM, 4 },
+ /* Ignore 16-bit fields 'fmtvec' and '__fill'. */
+ { 0 }
+ };
+
+#define M68K_LINUX_GREGS_SIZE (20 * 4)
+
+static const struct regcache_map_entry m68k_linux_fpregmap[] =
+ {
+ { 8, M68K_FP0_REGNUM, 12 }, /* fp0 ... fp7 */
+ { 1, M68K_FPC_REGNUM, 4 },
+ { 1, M68K_FPS_REGNUM, 4 },
+ { 1, M68K_FPI_REGNUM, 4 },
+ { 0 }
+ };
+
+#define M68K_LINUX_FPREGS_SIZE (27 * 4)
+
+/* Register sets. */
+
+static const struct regset m68k_linux_gregset =
+ {
+ m68k_linux_gregmap,
+ regcache_supply_regset, regcache_collect_regset
+ };
+
+static const struct regset m68k_linux_fpregset =
+ {
+ m68k_linux_fpregmap,
+ regcache_supply_regset, regcache_collect_regset
+ };
+
+/* Iterate over core file register note sections. */
+
+static void
+m68k_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ cb (".reg", M68K_LINUX_GREGS_SIZE, &m68k_linux_gregset, NULL, cb_data);
+ cb (".reg2", M68K_LINUX_FPREGS_SIZE, &m68k_linux_fpregset, NULL, cb_data);
+}
+
static void
m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ linux_init_abi (info, gdbarch);
+
tdep->jb_pc = M68K_LINUX_JB_PC;
tdep->jb_elt_size = M68K_LINUX_JB_ELEMENT_SIZE;
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+ /* Core file support. */
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, m68k_linux_iterate_over_regset_sections);
+
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_m68k_linux_tdep;
+
void
_initialize_m68k_linux_tdep (void)
{
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