sparc64obsd-tdep.c [plain text]
#include "defs.h"
#include "frame.h"
#include "frame-unwind.h"
#include "osabi.h"
#include "regset.h"
#include "symtab.h"
#include "solib-svr4.h"
#include "trad-frame.h"
#include "gdb_assert.h"
#include "sparc64-tdep.h"
#include "nbsd-tdep.h"
const struct sparc_gregset sparc64obsd_core_gregset =
{
0 * 8,
1 * 8,
2 * 8,
3 * 8,
-1,
-1,
7 * 8,
22 * 8,
4
};
static void
sparc64obsd_supply_gregset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *gregs, size_t len)
{
const char *regs = gregs;
sparc64_supply_gregset (regset->descr, regcache, regnum, regs);
sparc64_supply_fpregset (regcache, regnum, regs + 288);
}
static const int sparc64obsd_page_size = 8192;
static int
sparc64obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
CORE_ADDR start_pc = (pc & ~(sparc64obsd_page_size - 1));
unsigned long insn;
if (name)
return 0;
insn = sparc_fetch_instruction (start_pc + 0xe8);
if (insn != 0x83e82067)
return 0;
insn = sparc_fetch_instruction (start_pc + 0xf0);
if (insn != 0x91d02000)
return 0;
return 1;
}
static struct sparc_frame_cache *
sparc64obsd_frame_cache (struct frame_info *next_frame, void **this_cache)
{
struct sparc_frame_cache *cache;
CORE_ADDR addr;
if (*this_cache)
return *this_cache;
cache = sparc_frame_cache (next_frame, this_cache);
gdb_assert (cache == *this_cache);
if (cache->pc == 0)
{
cache->pc = frame_pc_unwind (next_frame);
cache->pc &= ~(sparc64obsd_page_size - 1);
cache->frameless_p = 0;
addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
cache->base = addr;
}
addr = cache->base + BIAS + 128 + 16;
cache->saved_regs = sparc64nbsd_sigcontext_saved_regs (addr, next_frame);
return cache;
}
static void
sparc64obsd_frame_this_id (struct frame_info *next_frame, void **this_cache,
struct frame_id *this_id)
{
struct sparc_frame_cache *cache =
sparc64obsd_frame_cache (next_frame, this_cache);
(*this_id) = frame_id_build (cache->base, cache->pc);
}
static void
sparc64obsd_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)
{
struct sparc_frame_cache *cache =
sparc64obsd_frame_cache (next_frame, this_cache);
trad_frame_prev_register (next_frame, cache->saved_regs, regnum,
optimizedp, lvalp, addrp, realnump, valuep);
}
static const struct frame_unwind sparc64obsd_frame_unwind =
{
SIGTRAMP_FRAME,
sparc64obsd_frame_this_id,
sparc64obsd_frame_prev_register
};
static const struct frame_unwind *
sparc64obsd_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 (sparc64obsd_pc_in_sigtramp (pc, name))
return &sparc64obsd_frame_unwind;
return NULL;
}
static void
sparc64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
tdep->gregset = XMALLOC (struct regset);
tdep->gregset->descr = &sparc64obsd_core_gregset;
tdep->gregset->supply_regset = sparc64obsd_supply_gregset;
tdep->sizeof_gregset = 832;
set_gdbarch_pc_in_sigtramp (gdbarch, sparc64obsd_pc_in_sigtramp);
frame_unwind_append_sniffer (gdbarch, sparc64obsd_sigtramp_frame_sniffer);
sparc64_init_abi (info, gdbarch);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, nbsd_lp64_solib_svr4_fetch_link_map_offsets);
}
void _initialize_sparc64obsd_tdep (void);
void
_initialize_sparc64obsd_tdep (void)
{
gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
GDB_OSABI_OPENBSD_ELF, sparc64obsd_init_abi);
}