/* Target-dependent code for GDB, the GNU debugger.
- Copyright (C) 1986-2017 Free Software Foundation, Inc.
+ Copyright (C) 1986-2018 Free Software Foundation, Inc.
This file is part of GDB.
#include "trad-frame.h"
#include "frame-unwind.h"
#include "tramp-frame.h"
-#include "observer.h"
+#include "observable.h"
#include "auxv.h"
#include "elf/common.h"
#include "elf/ppc64.h"
#include "parser-defs.h"
#include "user-regs.h"
#include <ctype.h>
-#include "elf-bfd.h" /* for elfcore_write_* */
+#include "elf-bfd.h"
#include "features/rs6000/powerpc-32l.c"
#include "features/rs6000/powerpc-altivec32l.c"
readbuf, writebuf);
}
-/* PLT stub in executable. */
-static struct ppc_insn_pattern powerpc32_plt_stub[] =
+/* PLT stub in an executable. */
+static const struct ppc_insn_pattern powerpc32_plt_stub[] =
{
{ 0xffff0000, 0x3d600000, 0 }, /* lis r11, xxxx */
{ 0xffff0000, 0x816b0000, 0 }, /* lwz r11, xxxx(r11) */
{ 0, 0, 0 }
};
-/* PLT stub in shared library. */
-static struct ppc_insn_pattern powerpc32_plt_stub_so[] =
+/* PLT stubs in a shared library or PIE.
+ The first variant is used when the PLT entry is within +/-32k of
+ the GOT pointer (r30). */
+static const struct ppc_insn_pattern powerpc32_plt_stub_so_1[] =
{
{ 0xffff0000, 0x817e0000, 0 }, /* lwz r11, xxxx(r30) */
{ 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */
{ 0xffffffff, 0x4e800420, 0 }, /* bctr */
- { 0xffffffff, 0x60000000, 0 }, /* nop */
{ 0, 0, 0 }
};
-#define POWERPC32_PLT_STUB_LEN ARRAY_SIZE (powerpc32_plt_stub)
+
+/* The second variant is used when the PLT entry is more than +/-32k
+ from the GOT pointer (r30). */
+static const struct ppc_insn_pattern powerpc32_plt_stub_so_2[] =
+ {
+ { 0xffff0000, 0x3d7e0000, 0 }, /* addis r11, r30, xxxx */
+ { 0xffff0000, 0x816b0000, 0 }, /* lwz r11, xxxx(r11) */
+ { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */
+ { 0xffffffff, 0x4e800420, 0 }, /* bctr */
+ { 0, 0, 0 }
+ };
+
+/* The max number of insns we check using ppc_insns_match_pattern. */
+#define POWERPC32_PLT_CHECK_LEN (ARRAY_SIZE (powerpc32_plt_stub) - 1)
/* Check if PC is in PLT stub. For non-secure PLT, stub is in .plt
section. For secure PLT, stub is in .text and we need to check
When the execution direction is EXEC_REVERSE, scan backward to
check whether we are in the middle of a PLT stub. Currently,
- we only look-behind at most 4 instructions (the max length of PLT
+ we only look-behind at most 4 instructions (the max length of a PLT
stub sequence. */
static CORE_ADDR
ppc_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
{
- unsigned int insnbuf[POWERPC32_PLT_STUB_LEN];
+ unsigned int insnbuf[POWERPC32_PLT_CHECK_LEN];
struct gdbarch *gdbarch = get_frame_arch (frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* When reverse-debugging, scan backward to check whether we are
in the middle of trampoline code. */
if (execution_direction == EXEC_REVERSE)
- scan_limit = 4; /* At more 4 instructions. */
+ scan_limit = 4; /* At most 4 instructions. */
for (i = 0; i < scan_limit; i++)
{
if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub, insnbuf))
{
- /* Insn pattern is
+ /* Calculate PLT entry address from
lis r11, xxxx
- lwz r11, xxxx(r11)
- Branch target is in r11. */
-
- target = (ppc_insn_d_field (insnbuf[0]) << 16)
- | ppc_insn_d_field (insnbuf[1]);
- target = read_memory_unsigned_integer (target, 4, byte_order);
+ lwz r11, xxxx(r11). */
+ target = ((ppc_insn_d_field (insnbuf[0]) << 16)
+ + ppc_insn_d_field (insnbuf[1]));
+ }
+ else if (i < ARRAY_SIZE (powerpc32_plt_stub_so_1) - 1
+ && ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so_1,
+ insnbuf))
+ {
+ /* Calculate PLT entry address from
+ lwz r11, xxxx(r30). */
+ target = (ppc_insn_d_field (insnbuf[0])
+ + get_frame_register_unsigned (frame,
+ tdep->ppc_gp0_regnum + 30));
}
- else if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so,
+ else if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so_2,
insnbuf))
{
- /* Insn pattern is
- lwz r11, xxxx(r30)
- Branch target is in r11. */
-
- target = get_frame_register_unsigned (frame,
- tdep->ppc_gp0_regnum + 30)
- + ppc_insn_d_field (insnbuf[0]);
- target = read_memory_unsigned_integer (target, 4, byte_order);
+ /* Calculate PLT entry address from
+ addis r11, r30, xxxx
+ lwz r11, xxxx(r11). */
+ target = ((ppc_insn_d_field (insnbuf[0]) << 16)
+ + ppc_insn_d_field (insnbuf[1])
+ + get_frame_register_unsigned (frame,
+ tdep->ppc_gp0_regnum + 30));
}
else
{
- /* Scan backward one more instructions if doesn't match. */
+ /* Scan backward one more instruction if it doesn't match. */
pc -= 4;
continue;
}
+ target = read_memory_unsigned_integer (target, 4, byte_order);
return target;
}
ppc_supply_gregset (regset, regcache, regnum, gregs, len);
- if (ppc_linux_trap_reg_p (get_regcache_arch (regcache)))
+ if (ppc_linux_trap_reg_p (regcache->arch ()))
{
/* "orig_r3" is stored 2 slots after "pc". */
if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM)
ppc_collect_gregset (regset, regcache, regnum, gregs, len);
- if (ppc_linux_trap_reg_p (get_regcache_arch (regcache)))
+ if (ppc_linux_trap_reg_p (regcache->arch ()))
{
/* "orig_r3" is stored 2 slots after "pc". */
if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM)
struct regcache *regcache = get_thread_regcache (ptid);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- struct cleanup *cleanbuf;
- /* The content of a register */
- gdb_byte *buf;
- /* The result */
- LONGEST ret;
/* Make sure we're in a 32- or 64-bit machine */
gdb_assert (tdep->wordsize == 4 || tdep->wordsize == 8);
- buf = (gdb_byte *) xmalloc (tdep->wordsize * sizeof (gdb_byte));
-
- cleanbuf = make_cleanup (xfree, buf);
+ /* The content of a register */
+ gdb::byte_vector buf (tdep->wordsize);
/* Getting the system call number from the register.
When dealing with PowerPC architecture, this information
is stored at 0th register. */
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum, buf);
-
- ret = extract_signed_integer (buf, tdep->wordsize, byte_order);
- do_cleanups (cleanbuf);
+ regcache_cooked_read (regcache, tdep->ppc_gp0_regnum, buf.data ());
- return ret;
+ return extract_signed_integer (buf.data (), tdep->wordsize, byte_order);
}
/* PPC process record-replay */
static int
ppc_linux_syscall_record (struct regcache *regcache)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
ULONGEST scnum;
enum gdb_syscall syscall_gdb;
static void
ppc_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
regcache_cooked_write_unsigned (regcache, gdbarch_pc_regnum (gdbarch), pc);
/* Look up cached address of thread-local variable. */
if (!ptid_equal (spe_context_cache_ptid, inferior_ptid))
{
- struct target_ops *target = ¤t_target;
+ struct target_ops *target = target_stack;
TRY
{
Instead, we have cached the lm_addr value, and use that to
directly call the target's to_get_thread_local_address. */
spe_context_cache_address
- = target->to_get_thread_local_address (target, inferior_ptid,
- spe_context_lm_addr,
- spe_context_offset);
+ = target->get_thread_local_address (inferior_ptid,
+ spe_context_lm_addr,
+ spe_context_offset);
spe_context_cache_ptid = inferior_ptid;
}
struct ppu2spu_cache
{
struct frame_id frame_id;
- struct regcache *regcache;
+ readonly_detached_regcache *regcache;
};
static struct gdbarch *
ppu2spu_prev_arch (struct frame_info *this_frame, void **this_cache)
{
struct ppu2spu_cache *cache = (struct ppu2spu_cache *) *this_cache;
- return get_regcache_arch (cache->regcache);
+ return cache->regcache->arch ();
}
static void
void **this_cache, int regnum)
{
struct ppu2spu_cache *cache = (struct ppu2spu_cache *) *this_cache;
- struct gdbarch *gdbarch = get_regcache_arch (cache->regcache);
+ struct gdbarch *gdbarch = cache->regcache->arch ();
gdb_byte *buf;
buf = (gdb_byte *) alloca (register_size (gdbarch, regnum));
- if (regnum < gdbarch_num_regs (gdbarch))
- regcache_raw_read (cache->regcache, regnum, buf);
- else
- gdbarch_pseudo_register_read (gdbarch, cache->regcache, regnum, buf);
-
+ cache->regcache->cooked_read (regnum, buf);
return frame_unwind_got_bytes (this_frame, regnum, buf);
}
return 0;
xsnprintf (annex, sizeof annex, "%d/regs", data.id);
- if (target_read (¤t_target, TARGET_OBJECT_SPU, annex,
+ if (target_read (target_stack, TARGET_OBJECT_SPU, annex,
data.gprs, 0, sizeof data.gprs)
== sizeof data.gprs)
{
struct ppu2spu_cache *cache
= FRAME_OBSTACK_CALLOC (1, struct ppu2spu_cache);
-
- struct address_space *aspace = get_frame_address_space (this_frame);
- std::unique_ptr<struct regcache> regcache
- (new struct regcache (data.gdbarch, aspace));
- regcache_save (regcache.get (), ppu2spu_unwind_register, &data);
+ std::unique_ptr<readonly_detached_regcache> regcache
+ (new readonly_detached_regcache (data.gdbarch,
+ ppu2spu_unwind_register,
+ &data));
cache->frame_id = frame_id_build (base, func);
cache->regcache = regcache.release ();
const char *name, int len)
{
if (len == 128 && name)
- if (strcmp (name, "__float128") == 0
- || strcmp (name, "_Float128") == 0
- || strcmp (name, "_Float64x") == 0
- || strcmp (name, "complex _Float128") == 0
- || strcmp (name, "complex _Float64x") == 0)
- return floatformats_ia64_quad;
+ {
+ if (strcmp (name, "__float128") == 0
+ || strcmp (name, "_Float128") == 0
+ || strcmp (name, "_Float64x") == 0
+ || strcmp (name, "complex _Float128") == 0
+ || strcmp (name, "complex _Float64x") == 0)
+ return floatformats_ia64_quad;
+
+ if (strcmp (name, "__ibm128") == 0)
+ return floatformats_ibm_long_double;
+ }
return default_floatformat_for_type (gdbarch, name, len);
}
linux_init_abi (info, gdbarch);
/* PPC GNU/Linux uses either 64-bit or 128-bit long doubles; where
- 128-bit, they are IBM long double, not IEEE quad long double as
- in the System V ABI PowerPC Processor Supplement. We can safely
- let them default to 128-bit, since the debug info will give the
- size of type actually used in each case. */
+ 128-bit, they can be either IBM long double or IEEE quad long double.
+ The 64-bit long double case will be detected automatically using
+ the size specified in debug info. We use a .gnu.attribute flag
+ to distinguish between the IBM long double and IEEE quad cases. */
set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT);
- set_gdbarch_long_double_format (gdbarch, floatformats_ibm_long_double);
+ if (tdep->long_double_abi == POWERPC_LONG_DOUBLE_IEEE128)
+ set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
+ else
+ set_gdbarch_long_double_format (gdbarch, floatformats_ibm_long_double);
/* Support for floating-point data type variants. */
set_gdbarch_floatformat_for_type (gdbarch, ppc_floatformat_for_type);
set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpc");
}
- /* PPC32 uses a different prpsinfo32 compared to most other Linux
- archs. */
- if (tdep->wordsize == 4)
- set_gdbarch_elfcore_write_linux_prpsinfo (gdbarch,
- elfcore_write_ppc_linux_prpsinfo32);
-
set_gdbarch_core_read_description (gdbarch, ppc_linux_core_read_description);
set_gdbarch_iterate_over_regset_sections (gdbarch,
ppc_linux_iterate_over_regset_sections);
/* Cell/B.E. cross-architecture unwinder support. */
frame_unwind_prepend_unwinder (gdbarch, &ppu2spu_unwind);
+
+ /* We need to support more than "addr_bit" significant address bits
+ in order to support SPUADDR_ADDR encoded values. */
+ set_gdbarch_significant_addr_bit (gdbarch, 64);
}
set_gdbarch_displaced_step_location (gdbarch,
ppc_linux_init_abi);
/* Attach to observers to track __spe_current_active_context. */
- observer_attach_inferior_created (ppc_linux_spe_context_inferior_created);
- observer_attach_solib_loaded (ppc_linux_spe_context_solib_loaded);
- observer_attach_solib_unloaded (ppc_linux_spe_context_solib_unloaded);
+ gdb::observers::inferior_created.attach (ppc_linux_spe_context_inferior_created);
+ gdb::observers::solib_loaded.attach (ppc_linux_spe_context_solib_loaded);
+ gdb::observers::solib_unloaded.attach (ppc_linux_spe_context_solib_unloaded);
/* Initialize the Linux target descriptions. */
initialize_tdesc_powerpc_32l ();
projects / thirdparty / binutils-gdb.git / blobdiff