sparc64nbsd-tdep.c [plain text]
#include "defs.h"
#include "frame.h"
#include "frame-unwind.h"
#include "gdbcore.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "symtab.h"
#include "objfiles.h"
#include "solib-svr4.h"
#include "trad-frame.h"
#include "gdb_assert.h"
#include "gdb_string.h"
#include "sparc64-tdep.h"
#include "nbsd-tdep.h"
const struct sparc_gregset sparc64nbsd_gregset =
{
0 * 8,
1 * 8,
2 * 8,
3 * 8,
-1,
-1,
5 * 8,
-1,
4
};
static void
sparc64nbsd_supply_gregset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *gregs, size_t len)
{
sparc64_supply_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs);
}
static void
sparc64nbsd_supply_fpregset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *fpregs, size_t len)
{
sparc64_supply_fpregset (regcache, regnum, fpregs);
}
static const CORE_ADDR sparc64nbsd_sigtramp_start = 0xffffffffffffdee4ULL;
static const CORE_ADDR sparc64nbsd_sigtramp_end = 0xffffffffffffe000ULL;
static int
sparc64nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
if (pc >= sparc64nbsd_sigtramp_start && pc < sparc64nbsd_sigtramp_end)
return 1;
return nbsd_pc_in_sigtramp (pc, name);
}
struct trad_frame_saved_reg *
sparc64nbsd_sigcontext_saved_regs (CORE_ADDR sigcontext_addr,
struct frame_info *next_frame)
{
struct trad_frame_saved_reg *saved_regs;
CORE_ADDR addr, sp;
int regnum, delta;
saved_regs = trad_frame_alloc_saved_regs (next_frame);
saved_regs[SPARC_SP_REGNUM].addr = sigcontext_addr + 8;
saved_regs[SPARC64_PC_REGNUM].addr = sigcontext_addr + 16;
saved_regs[SPARC64_NPC_REGNUM].addr = sigcontext_addr + 24;
saved_regs[SPARC64_STATE_REGNUM].addr = sigcontext_addr + 32;
saved_regs[SPARC_G1_REGNUM].addr = sigcontext_addr + 40;
saved_regs[SPARC_O0_REGNUM].addr = sigcontext_addr + 48;
delta = SPARC_L0_REGNUM - SPARC_G0_REGNUM;
for (regnum = SPARC_G2_REGNUM; regnum <= SPARC_G7_REGNUM; regnum++)
saved_regs[regnum].realreg = regnum + delta;
saved_regs[SPARC64_Y_REGNUM].realreg = SPARC_L1_REGNUM;
delta = SPARC_I0_REGNUM - SPARC_O0_REGNUM;
for (regnum = SPARC_O1_REGNUM; regnum <= SPARC_O5_REGNUM; regnum++)
saved_regs[regnum].realreg = regnum + delta;
saved_regs[SPARC_O7_REGNUM].realreg = SPARC_I7_REGNUM;
addr = saved_regs[SPARC_SP_REGNUM].addr;
sp = get_frame_memory_unsigned (next_frame, addr, 8);
for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
saved_regs[regnum].addr = addr;
{
ULONGEST wcookie = sparc_fetch_wcookie ();
if (wcookie != 0)
{
ULONGEST i7;
addr = saved_regs[SPARC_I7_REGNUM].addr;
i7 = get_frame_memory_unsigned (next_frame, addr, 8);
trad_frame_set_value (saved_regs, SPARC_I7_REGNUM, i7 ^ wcookie);
}
}
return saved_regs;
}
static struct sparc_frame_cache *
sparc64nbsd_sigcontext_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 = sparc64nbsd_sigtramp_start;
cache->frameless_p = 0;
addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
if (addr & 1)
addr += BIAS;
cache->base = addr;
}
addr = cache->base + 128 + 8;
cache->saved_regs = sparc64nbsd_sigcontext_saved_regs (addr, next_frame);
return cache;
}
static void
sparc64nbsd_sigcontext_frame_this_id (struct frame_info *next_frame,
void **this_cache,
struct frame_id *this_id)
{
struct sparc_frame_cache *cache =
sparc64nbsd_sigcontext_frame_cache (next_frame, this_cache);
(*this_id) = frame_id_build (cache->base, cache->pc);
}
static void
sparc64nbsd_sigcontext_frame_prev_register (struct frame_info *next_frame,
void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp,
CORE_ADDR *addrp,
int *realnump, gdb_byte *valuep)
{
struct sparc_frame_cache *cache =
sparc64nbsd_sigcontext_frame_cache (next_frame, this_cache);
trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
optimizedp, lvalp, addrp, realnump, valuep);
}
static const struct frame_unwind sparc64nbsd_sigcontext_frame_unwind =
{
SIGTRAMP_FRAME,
sparc64nbsd_sigcontext_frame_this_id,
sparc64nbsd_sigcontext_frame_prev_register
};
static const struct frame_unwind *
sparc64nbsd_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 (sparc64nbsd_pc_in_sigtramp (pc, name))
{
if (name == NULL || strncmp (name, "__sigtramp_sigcontext", 21))
return &sparc64nbsd_sigcontext_frame_unwind;
}
return NULL;
}
static void
sparc64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
tdep->gregset = regset_alloc (gdbarch, sparc64nbsd_supply_gregset, NULL);
tdep->sizeof_gregset = 160;
tdep->fpregset = regset_alloc (gdbarch, sparc64nbsd_supply_fpregset, NULL);
tdep->sizeof_fpregset = 272;
frame_unwind_append_sniffer (gdbarch, sparc64nbsd_sigtramp_frame_sniffer);
sparc64_init_abi (info, gdbarch);
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_lp64_fetch_link_map_offsets);
}
void _initialize_sparc64nbsd_tdep (void);
void
_initialize_sparc64nbsd_tdep (void)
{
gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
GDB_OSABI_NETBSD_ELF, sparc64nbsd_init_abi);
}