/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
- Copyright (C) 2000, 2004, 2005, 2007, 2008, 2009
- Free Software Foundation, Inc.
+ Copyright (C) 2000-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "osabi.h"
#include "solib-svr4.h"
#include "symtab.h"
+#include "linux-tdep.h"
+#include "regset.h"
+
+#include <ctype.h>
/* The sigtramp code is in a non-readable (executable-only) region
of memory called the ``gate page''. The addresses in question
were determined by examining the system headers. They are
- overly generous to allow for different pages sizes. */
+ overly generous to allow for different pages sizes. */
#define GATE_AREA_START 0xa000000000000100LL
#define GATE_AREA_END 0xa000000000020000LL
-/* Offset to sigcontext structure from frame of handler */
+/* Offset to sigcontext structure from frame of handler. */
#define IA64_LINUX_SIGCONTEXT_OFFSET 192
static int
/* IA-64 GNU/Linux specific function which, given a frame address and
a register number, returns the address at which that register may be
- found. 0 is returned for registers which aren't stored in the the
- sigcontext structure. */
+ found. 0 is returned for registers which aren't stored in the
+ sigcontext structure. */
static CORE_ADDR
-ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
+ia64_linux_sigcontext_register_address (struct gdbarch *gdbarch,
+ CORE_ADDR sp, int regno)
{
- char buf[8];
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[8];
CORE_ADDR sigcontext_addr = 0;
- /* The address of the sigcontext area is found at offset 16 in the sigframe. */
+ /* The address of the sigcontext area is found at offset 16 in the
+ sigframe. */
read_memory (sp + 16, buf, 8);
- sigcontext_addr = extract_unsigned_integer (buf, 8);
+ sigcontext_addr = extract_unsigned_integer (buf, 8, byte_order);
if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
return sigcontext_addr + 200 + 8 * (regno - IA64_GR0_REGNUM);
return sigcontext_addr + 56; /* user mask only */
/* sc_ar_rsc is provided, from which we could compute bspstore, but
I don't think it's worth it. Anyway, if we want it, it's at offset
- 64 */
+ 64. */
case IA64_BSP_REGNUM :
return sigcontext_addr + 72;
case IA64_RNAT_REGNUM :
regcache_cooked_write_unsigned (regcache, IA64_GR10_REGNUM, 0);
}
+/* Implementation of `gdbarch_stap_is_single_operand', as defined in
+ gdbarch.h. */
+
+static int
+ia64_linux_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
+{
+ return ((isdigit (*s) && s[1] == '[' && s[2] == 'r') /* Displacement. */
+ || *s == 'r' /* Register value. */
+ || isdigit (*s)); /* Literal number. */
+}
+
+/* Core file support. */
+
+static const struct regcache_map_entry ia64_linux_gregmap[] =
+ {
+ { 32, IA64_GR0_REGNUM, 8 }, /* r0 ... r31 */
+ { 1, REGCACHE_MAP_SKIP, 8 }, /* FIXME: NAT collection bits? */
+ { 1, IA64_PR_REGNUM, 8 },
+ { 8, IA64_BR0_REGNUM, 8 }, /* b0 ... b7 */
+ { 1, IA64_IP_REGNUM, 8 },
+ { 1, IA64_CFM_REGNUM, 8 },
+ { 1, IA64_PSR_REGNUM, 8 },
+ { 1, IA64_RSC_REGNUM, 8 },
+ { 1, IA64_BSP_REGNUM, 8 },
+ { 1, IA64_BSPSTORE_REGNUM, 8 },
+ { 1, IA64_RNAT_REGNUM, 8 },
+ { 1, IA64_CCV_REGNUM, 8 },
+ { 1, IA64_UNAT_REGNUM, 8 },
+ { 1, IA64_FPSR_REGNUM, 8 },
+ { 1, IA64_PFS_REGNUM, 8 },
+ { 1, IA64_LC_REGNUM, 8 },
+ { 1, IA64_EC_REGNUM, 8 },
+ { 0 }
+ };
+
+/* Size of 'gregset_t', as defined by the Linux kernel. Note that
+ this is more than actually mapped in the regmap above. */
+
+#define IA64_LINUX_GREGS_SIZE (128 * 8)
+
+static const struct regcache_map_entry ia64_linux_fpregmap[] =
+ {
+ { 128, IA64_FR0_REGNUM, 16 }, /* f0 ... f127 */
+ { 0 }
+ };
+
+#define IA64_LINUX_FPREGS_SIZE (128 * 16)
+
+static void
+ia64_linux_supply_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *regs, size_t len)
+{
+ const gdb_byte f_zero[16] = { 0 };
+ const gdb_byte f_one[16] =
+ { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0xff, 0, 0, 0, 0, 0, 0 };
+
+ regcache_supply_regset (regset, regcache, regnum, regs, len);
+
+ /* Kernel generated cores have fr1==0 instead of 1.0. Older GDBs
+ did the same. So ignore whatever might be recorded in fpregset_t
+ for fr0/fr1 and always supply their expected values. */
+ if (regnum == -1 || regnum == IA64_FR0_REGNUM)
+ regcache->raw_supply (IA64_FR0_REGNUM, f_zero);
+ if (regnum == -1 || regnum == IA64_FR1_REGNUM)
+ regcache->raw_supply (IA64_FR1_REGNUM, f_one);
+}
+
+static const struct regset ia64_linux_gregset =
+ {
+ ia64_linux_gregmap,
+ regcache_supply_regset, regcache_collect_regset
+ };
+
+static const struct regset ia64_linux_fpregset =
+ {
+ ia64_linux_fpregmap,
+ ia64_linux_supply_fpregset, regcache_collect_regset
+ };
+
+static void
+ia64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ cb (".reg", IA64_LINUX_GREGS_SIZE, IA64_LINUX_GREGS_SIZE, &ia64_linux_gregset,
+ NULL, cb_data);
+ cb (".reg2", IA64_LINUX_FPREGS_SIZE, IA64_LINUX_FPREGS_SIZE,
+ &ia64_linux_fpregset, NULL, cb_data);
+}
+
static void
ia64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ static const char *const stap_register_prefixes[] = { "r", NULL };
+ static const char *const stap_register_indirection_prefixes[] = { "[",
+ NULL };
+ static const char *const stap_register_indirection_suffixes[] = { "]",
+ NULL };
+
+ linux_init_abi (info, gdbarch);
/* Set the method of obtaining the sigcontext addresses at which
registers are saved. */
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
+
+ /* Core file support. */
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, ia64_linux_iterate_over_regset_sections);
+
+ /* SystemTap related. */
+ set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes);
+ set_gdbarch_stap_register_indirection_prefixes (gdbarch,
+ stap_register_indirection_prefixes);
+ set_gdbarch_stap_register_indirection_suffixes (gdbarch,
+ stap_register_indirection_suffixes);
+ set_gdbarch_stap_gdb_register_prefix (gdbarch, "r");
+ set_gdbarch_stap_is_single_operand (gdbarch,
+ ia64_linux_stap_is_single_operand);
}
+void _initialize_ia64_linux_tdep ();
void
-_initialize_ia64_linux_tdep (void)
+_initialize_ia64_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_ia64, 0, GDB_OSABI_LINUX,
ia64_linux_init_abi);
projects / deliverable / binutils-gdb.git / blobdiff