-/* Target-dependent code for GDB, the GNU debugger.
+/* Target-dependent code for GNU/Linux on s390.
- Copyright (C) 2001-2014 Free Software Foundation, Inc.
+ Copyright (C) 2001-2020 Free Software Foundation, Inc.
Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
for IBM Deutschland Entwicklung GmbH, IBM Corporation.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "arch-utils.h"
-#include "frame.h"
-#include "inferior.h"
-#include "infrun.h"
-#include "symtab.h"
-#include "target.h"
+
+#include "auxv.h"
+#include "elf/common.h"
+#include "frame-base.h"
+#include "frame-unwind.h"
+#include "gdbarch.h"
#include "gdbcore.h"
-#include "gdbcmd.h"
+#include "linux-record.h"
+#include "linux-tdep.h"
#include "objfiles.h"
-#include "floatformat.h"
+#include "osabi.h"
#include "regcache.h"
-#include "trad-frame.h"
-#include "frame-base.h"
-#include "frame-unwind.h"
-#include "dwarf2-frame.h"
-#include "reggroups.h"
+#include "record-full.h"
#include "regset.h"
-#include "value.h"
-#include "dis-asm.h"
-#include "solib-svr4.h"
-#include "prologue-value.h"
-#include "linux-tdep.h"
+#include "s390-tdep.h"
#include "s390-linux-tdep.h"
-#include "auxv.h"
+#include "solib-svr4.h"
+#include "target.h"
+#include "trad-frame.h"
#include "xml-syscall.h"
-#include "stap-probe.h"
-#include "ax.h"
-#include "ax-gdb.h"
-#include "user-regs.h"
-#include "cli/cli-utils.h"
-#include <ctype.h>
-#include "elf/common.h"
-
-#include "features/s390-linux32.c"
#include "features/s390-linux32v1.c"
#include "features/s390-linux32v2.c"
#include "features/s390-linux64.c"
#include "features/s390-linux64v1.c"
#include "features/s390-linux64v2.c"
#include "features/s390-te-linux64.c"
-#include "features/s390x-linux64.c"
+#include "features/s390-vx-linux64.c"
+#include "features/s390-tevx-linux64.c"
+#include "features/s390-gs-linux64.c"
#include "features/s390x-linux64v1.c"
#include "features/s390x-linux64v2.c"
#include "features/s390x-te-linux64.c"
+#include "features/s390x-vx-linux64.c"
+#include "features/s390x-tevx-linux64.c"
+#include "features/s390x-gs-linux64.c"
#define XML_SYSCALL_FILENAME_S390 "syscalls/s390-linux.xml"
#define XML_SYSCALL_FILENAME_S390X "syscalls/s390x-linux.xml"
-/* The tdep structure. */
-
-struct gdbarch_tdep
-{
- /* ABI version. */
- enum { ABI_LINUX_S390, ABI_LINUX_ZSERIES } abi;
-
- /* Pseudo register numbers. */
- int gpr_full_regnum;
- int pc_regnum;
- int cc_regnum;
-
- /* Core file register sets. */
- const struct regset *gregset;
- int sizeof_gregset;
-
- const struct regset *fpregset;
- int sizeof_fpregset;
-
- int have_linux_v1;
- int have_linux_v2;
- int have_tdb;
-};
-
-
-/* ABI call-saved register information. */
-
-static int
-s390_register_call_saved (struct gdbarch *gdbarch, int regnum)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- switch (tdep->abi)
- {
- case ABI_LINUX_S390:
- if ((regnum >= S390_R6_REGNUM && regnum <= S390_R15_REGNUM)
- || regnum == S390_F4_REGNUM || regnum == S390_F6_REGNUM
- || regnum == S390_A0_REGNUM)
- return 1;
-
- break;
- case ABI_LINUX_ZSERIES:
- if ((regnum >= S390_R6_REGNUM && regnum <= S390_R15_REGNUM)
- || (regnum >= S390_F8_REGNUM && regnum <= S390_F15_REGNUM)
- || (regnum >= S390_A0_REGNUM && regnum <= S390_A1_REGNUM))
- return 1;
-
- break;
- }
+/* Register handling. */
- return 0;
-}
+/* Implement cannot_store_register gdbarch method. */
static int
s390_cannot_store_register (struct gdbarch *gdbarch, int regnum)
return regnum == S390_LAST_BREAK_REGNUM;
}
+/* Implement write_pc gdbarch method. */
+
static void
s390_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc);
regcache_cooked_write_unsigned (regcache, S390_SYSTEM_CALL_REGNUM, 0);
}
-
-/* DWARF Register Mapping. */
-
-static const short s390_dwarf_regmap[] =
-{
- /* General Purpose Registers. */
- S390_R0_REGNUM, S390_R1_REGNUM, S390_R2_REGNUM, S390_R3_REGNUM,
- S390_R4_REGNUM, S390_R5_REGNUM, S390_R6_REGNUM, S390_R7_REGNUM,
- S390_R8_REGNUM, S390_R9_REGNUM, S390_R10_REGNUM, S390_R11_REGNUM,
- S390_R12_REGNUM, S390_R13_REGNUM, S390_R14_REGNUM, S390_R15_REGNUM,
-
- /* Floating Point Registers. */
- S390_F0_REGNUM, S390_F2_REGNUM, S390_F4_REGNUM, S390_F6_REGNUM,
- S390_F1_REGNUM, S390_F3_REGNUM, S390_F5_REGNUM, S390_F7_REGNUM,
- S390_F8_REGNUM, S390_F10_REGNUM, S390_F12_REGNUM, S390_F14_REGNUM,
- S390_F9_REGNUM, S390_F11_REGNUM, S390_F13_REGNUM, S390_F15_REGNUM,
-
- /* Control Registers (not mapped). */
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
-
- /* Access Registers. */
- S390_A0_REGNUM, S390_A1_REGNUM, S390_A2_REGNUM, S390_A3_REGNUM,
- S390_A4_REGNUM, S390_A5_REGNUM, S390_A6_REGNUM, S390_A7_REGNUM,
- S390_A8_REGNUM, S390_A9_REGNUM, S390_A10_REGNUM, S390_A11_REGNUM,
- S390_A12_REGNUM, S390_A13_REGNUM, S390_A14_REGNUM, S390_A15_REGNUM,
-
- /* Program Status Word. */
- S390_PSWM_REGNUM,
- S390_PSWA_REGNUM,
-
- /* GPR Lower Half Access. */
- S390_R0_REGNUM, S390_R1_REGNUM, S390_R2_REGNUM, S390_R3_REGNUM,
- S390_R4_REGNUM, S390_R5_REGNUM, S390_R6_REGNUM, S390_R7_REGNUM,
- S390_R8_REGNUM, S390_R9_REGNUM, S390_R10_REGNUM, S390_R11_REGNUM,
- S390_R12_REGNUM, S390_R13_REGNUM, S390_R14_REGNUM, S390_R15_REGNUM,
-
- /* GNU/Linux-specific registers (not mapped). */
- -1, -1, -1,
-};
-
-/* Convert DWARF register number REG to the appropriate register
- number used by GDB. */
-static int
-s390_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* In a 32-on-64 debug scenario, debug info refers to the full 64-bit
- GPRs. Note that call frame information still refers to the 32-bit
- lower halves, because s390_adjust_frame_regnum uses register numbers
- 66 .. 81 to access GPRs. */
- if (tdep->gpr_full_regnum != -1 && reg >= 0 && reg < 16)
- return tdep->gpr_full_regnum + reg;
-
- if (reg >= 0 && reg < ARRAY_SIZE (s390_dwarf_regmap))
- return s390_dwarf_regmap[reg];
-
- warning (_("Unmapped DWARF Register #%d encountered."), reg);
- return -1;
-}
-
-/* Translate a .eh_frame register to DWARF register, or adjust a
- .debug_frame register. */
-static int
-s390_adjust_frame_regnum (struct gdbarch *gdbarch, int num, int eh_frame_p)
-{
- /* See s390_dwarf_reg_to_regnum for comments. */
- return (num >= 0 && num < 16)? num + 66 : num;
-}
-
-
-/* Pseudo registers. */
-
-static int
-regnum_is_gpr_full (struct gdbarch_tdep *tdep, int regnum)
-{
- return (tdep->gpr_full_regnum != -1
- && regnum >= tdep->gpr_full_regnum
- && regnum <= tdep->gpr_full_regnum + 15);
-}
-
-static const char *
-s390_pseudo_register_name (struct gdbarch *gdbarch, int regnum)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- if (regnum == tdep->pc_regnum)
- return "pc";
-
- if (regnum == tdep->cc_regnum)
- return "cc";
-
- if (regnum_is_gpr_full (tdep, regnum))
- {
- static const char *full_name[] = {
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
- "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
- };
- return full_name[regnum - tdep->gpr_full_regnum];
- }
-
- internal_error (__FILE__, __LINE__, _("invalid regnum"));
-}
-
-static struct type *
-s390_pseudo_register_type (struct gdbarch *gdbarch, int regnum)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- if (regnum == tdep->pc_regnum)
- return builtin_type (gdbarch)->builtin_func_ptr;
-
- if (regnum == tdep->cc_regnum)
- return builtin_type (gdbarch)->builtin_int;
-
- if (regnum_is_gpr_full (tdep, regnum))
- return builtin_type (gdbarch)->builtin_uint64;
-
- internal_error (__FILE__, __LINE__, _("invalid regnum"));
-}
-
-static enum register_status
-s390_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
- int regnum, gdb_byte *buf)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- int regsize = register_size (gdbarch, regnum);
- ULONGEST val;
-
- if (regnum == tdep->pc_regnum)
- {
- enum register_status status;
-
- status = regcache_raw_read_unsigned (regcache, S390_PSWA_REGNUM, &val);
- if (status == REG_VALID)
- {
- if (register_size (gdbarch, S390_PSWA_REGNUM) == 4)
- val &= 0x7fffffff;
- store_unsigned_integer (buf, regsize, byte_order, val);
- }
- return status;
- }
-
- if (regnum == tdep->cc_regnum)
- {
- enum register_status status;
-
- status = regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &val);
- if (status == REG_VALID)
- {
- if (register_size (gdbarch, S390_PSWA_REGNUM) == 4)
- val = (val >> 12) & 3;
- else
- val = (val >> 44) & 3;
- store_unsigned_integer (buf, regsize, byte_order, val);
- }
- return status;
- }
-
- if (regnum_is_gpr_full (tdep, regnum))
- {
- enum register_status status;
- ULONGEST val_upper;
-
- regnum -= tdep->gpr_full_regnum;
-
- status = regcache_raw_read_unsigned (regcache, S390_R0_REGNUM + regnum, &val);
- if (status == REG_VALID)
- status = regcache_raw_read_unsigned (regcache, S390_R0_UPPER_REGNUM + regnum,
- &val_upper);
- if (status == REG_VALID)
- {
- val |= val_upper << 32;
- store_unsigned_integer (buf, regsize, byte_order, val);
- }
- return status;
- }
-
- internal_error (__FILE__, __LINE__, _("invalid regnum"));
-}
-
-static void
-s390_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
- int regnum, const gdb_byte *buf)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- int regsize = register_size (gdbarch, regnum);
- ULONGEST val, psw;
-
- if (regnum == tdep->pc_regnum)
- {
- val = extract_unsigned_integer (buf, regsize, byte_order);
- if (register_size (gdbarch, S390_PSWA_REGNUM) == 4)
- {
- regcache_raw_read_unsigned (regcache, S390_PSWA_REGNUM, &psw);
- val = (psw & 0x80000000) | (val & 0x7fffffff);
- }
- regcache_raw_write_unsigned (regcache, S390_PSWA_REGNUM, val);
- return;
- }
-
- if (regnum == tdep->cc_regnum)
- {
- val = extract_unsigned_integer (buf, regsize, byte_order);
- regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &psw);
- if (register_size (gdbarch, S390_PSWA_REGNUM) == 4)
- val = (psw & ~((ULONGEST)3 << 12)) | ((val & 3) << 12);
- else
- val = (psw & ~((ULONGEST)3 << 44)) | ((val & 3) << 44);
- regcache_raw_write_unsigned (regcache, S390_PSWM_REGNUM, val);
- return;
- }
-
- if (regnum_is_gpr_full (tdep, regnum))
- {
- regnum -= tdep->gpr_full_regnum;
- val = extract_unsigned_integer (buf, regsize, byte_order);
- regcache_raw_write_unsigned (regcache, S390_R0_REGNUM + regnum,
- val & 0xffffffff);
- regcache_raw_write_unsigned (regcache, S390_R0_UPPER_REGNUM + regnum,
- val >> 32);
- return;
- }
-
- internal_error (__FILE__, __LINE__, _("invalid regnum"));
-}
-
-/* 'float' values are stored in the upper half of floating-point
- registers, even though we are otherwise a big-endian platform. */
-
-static struct value *
-s390_value_from_register (struct gdbarch *gdbarch, struct type *type,
- int regnum, struct frame_id frame_id)
-{
- struct value *value = default_value_from_register (gdbarch, type,
- regnum, frame_id);
- check_typedef (type);
-
- if (regnum >= S390_F0_REGNUM && regnum <= S390_F15_REGNUM
- && TYPE_LENGTH (type) < 8)
- set_value_offset (value, 0);
-
- return value;
-}
-
-/* Register groups. */
-
-static int
-s390_pseudo_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
- struct reggroup *group)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* We usually save/restore the whole PSW, which includes PC and CC.
- However, some older gdbservers may not support saving/restoring
- the whole PSW yet, and will return an XML register description
- excluding those from the save/restore register groups. In those
- cases, we still need to explicitly save/restore PC and CC in order
- to push or pop frames. Since this doesn't hurt anything if we
- already save/restore the whole PSW (it's just redundant), we add
- PC and CC at this point unconditionally. */
- if (group == save_reggroup || group == restore_reggroup)
- return regnum == tdep->pc_regnum || regnum == tdep->cc_regnum;
-
- return default_register_reggroup_p (gdbarch, regnum, group);
-}
-
-
/* Maps for register sets. */
static const struct regcache_map_entry s390_gregmap[] =
{ 0 }
};
+static const struct regcache_map_entry s390_regmap_vxrs_low[] =
+ {
+ { 16, S390_V0_LOWER_REGNUM, 8 },
+ { 0 }
+ };
+
+static const struct regcache_map_entry s390_regmap_vxrs_high[] =
+ {
+ { 16, S390_V16_REGNUM, 16 },
+ { 0 }
+ };
+
+static const struct regcache_map_entry s390_regmap_gs[] =
+ {
+ { 1, REGCACHE_MAP_SKIP, 8 },
+ { 1, S390_GSD_REGNUM, 8 },
+ { 1, S390_GSSM_REGNUM, 8 },
+ { 1, S390_GSEPLA_REGNUM, 8 },
+ { 0 }
+ };
+
+static const struct regcache_map_entry s390_regmap_gsbc[] =
+ {
+ { 1, REGCACHE_MAP_SKIP, 8 },
+ { 1, S390_BC_GSD_REGNUM, 8 },
+ { 1, S390_BC_GSSM_REGNUM, 8 },
+ { 1, S390_BC_GSEPLA_REGNUM, 8 },
+ { 0 }
+ };
/* Supply the TDB regset. Like regcache_supply_regset, but invalidate
the TDB registers unless the TDB format field is valid. */
{
ULONGEST tdw;
enum register_status ret;
- int i;
regcache_supply_regset (regset, regcache, regnum, regs, len);
ret = regcache_cooked_read_unsigned (regcache, S390_TDB_DWORD0_REGNUM, &tdw);
regcache_collect_regset
};
-/* Return the appropriate register set for the core section identified
- by SECT_NAME and SECT_SIZE. */
-static const struct regset *
-s390_regset_from_core_section (struct gdbarch *gdbarch,
- const char *sect_name, size_t sect_size)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- if (strcmp (sect_name, ".reg") == 0 && sect_size >= tdep->sizeof_gregset)
- return tdep->gregset;
-
- if (strcmp (sect_name, ".reg2") == 0 && sect_size >= tdep->sizeof_fpregset)
- return tdep->fpregset;
-
- if (strcmp (sect_name, ".reg-s390-high-gprs") == 0 && sect_size >= 16*4)
- return &s390_upper_regset;
-
- if (strcmp (sect_name, ".reg-s390-last-break") == 0 && sect_size >= 8)
- return (gdbarch_ptr_bit (gdbarch) == 32
- ? &s390_last_break_regset : &s390x_last_break_regset);
+const struct regset s390_vxrs_low_regset = {
+ s390_regmap_vxrs_low,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
- if (strcmp (sect_name, ".reg-s390-system-call") == 0 && sect_size >= 4)
- return &s390_system_call_regset;
+const struct regset s390_vxrs_high_regset = {
+ s390_regmap_vxrs_high,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
- if (strcmp (sect_name, ".reg-s390-tdb") == 0 && sect_size >= 256)
- return &s390_tdb_regset;
+const struct regset s390_gs_regset = {
+ s390_regmap_gs,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
- return NULL;
-}
+const struct regset s390_gsbc_regset = {
+ s390_regmap_gsbc,
+ regcache_supply_regset,
+ regcache_collect_regset
+};
/* Iterate over supported core file register note sections. */
const struct regcache *regcache)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ const int gregset_size = (tdep->abi == ABI_LINUX_S390 ?
+ s390_sizeof_gregset : s390x_sizeof_gregset);
- cb (".reg", tdep->sizeof_gregset, "general-purpose", cb_data);
- cb (".reg2", s390_sizeof_fpregset, "floating-point", cb_data);
+ cb (".reg", gregset_size, gregset_size, &s390_gregset, NULL, cb_data);
+ cb (".reg2", s390_sizeof_fpregset, s390_sizeof_fpregset, &s390_fpregset, NULL,
+ cb_data);
if (tdep->abi == ABI_LINUX_S390 && tdep->gpr_full_regnum != -1)
- cb (".reg-s390-high-gprs", 16 * 4, "s390 GPR upper halves", cb_data);
+ cb (".reg-s390-high-gprs", 16 * 4, 16 * 4, &s390_upper_regset,
+ "s390 GPR upper halves", cb_data);
if (tdep->have_linux_v1)
- cb (".reg-s390-last-break", 8, "s930 last-break address", cb_data);
+ cb (".reg-s390-last-break", 8, 8,
+ (gdbarch_ptr_bit (gdbarch) == 32
+ ? &s390_last_break_regset : &s390x_last_break_regset),
+ "s390 last-break address", cb_data);
if (tdep->have_linux_v2)
- cb (".reg-s390-system-call", 4, "s390 system-call", cb_data);
+ cb (".reg-s390-system-call", 4, 4, &s390_system_call_regset,
+ "s390 system-call", cb_data);
/* If regcache is set, we are in "write" (gcore) mode. In this
case, don't iterate over the TDB unless its registers are
available. */
if (tdep->have_tdb
&& (regcache == NULL
- || REG_VALID == regcache_register_status (regcache,
- S390_TDB_DWORD0_REGNUM)))
- cb (".reg-s390-tdb", s390_sizeof_tdbregset, "s390 TDB", cb_data);
-}
-
-static const struct target_desc *
-s390_core_read_description (struct gdbarch *gdbarch,
- struct target_ops *target, bfd *abfd)
-{
- asection *high_gprs = bfd_get_section_by_name (abfd, ".reg-s390-high-gprs");
- asection *v1 = bfd_get_section_by_name (abfd, ".reg-s390-last-break");
- asection *v2 = bfd_get_section_by_name (abfd, ".reg-s390-system-call");
- asection *section = bfd_get_section_by_name (abfd, ".reg");
- CORE_ADDR hwcap = 0;
-
- target_auxv_search (target, AT_HWCAP, &hwcap);
- if (!section)
- return NULL;
-
- switch (bfd_section_size (abfd, section))
- {
- case s390_sizeof_gregset:
- if (high_gprs)
- return ((hwcap & HWCAP_S390_TE) ? tdesc_s390_te_linux64 :
- v2? tdesc_s390_linux64v2 :
- v1? tdesc_s390_linux64v1 : tdesc_s390_linux64);
- else
- return (v2? tdesc_s390_linux32v2 :
- v1? tdesc_s390_linux32v1 : tdesc_s390_linux32);
-
- case s390x_sizeof_gregset:
- return ((hwcap & HWCAP_S390_TE) ? tdesc_s390x_te_linux64 :
- v2? tdesc_s390x_linux64v2 :
- v1? tdesc_s390x_linux64v1 : tdesc_s390x_linux64);
-
- default:
- return NULL;
- }
-}
-
-
-/* Decoding S/390 instructions. */
-
-/* Named opcode values for the S/390 instructions we recognize. Some
- instructions have their opcode split across two fields; those are the
- op1_* and op2_* enums. */
-enum
- {
- op1_lhi = 0xa7, op2_lhi = 0x08,
- op1_lghi = 0xa7, op2_lghi = 0x09,
- op1_lgfi = 0xc0, op2_lgfi = 0x01,
- op_lr = 0x18,
- op_lgr = 0xb904,
- op_l = 0x58,
- op1_ly = 0xe3, op2_ly = 0x58,
- op1_lg = 0xe3, op2_lg = 0x04,
- op_lm = 0x98,
- op1_lmy = 0xeb, op2_lmy = 0x98,
- op1_lmg = 0xeb, op2_lmg = 0x04,
- op_st = 0x50,
- op1_sty = 0xe3, op2_sty = 0x50,
- op1_stg = 0xe3, op2_stg = 0x24,
- op_std = 0x60,
- op_stm = 0x90,
- op1_stmy = 0xeb, op2_stmy = 0x90,
- op1_stmg = 0xeb, op2_stmg = 0x24,
- op1_aghi = 0xa7, op2_aghi = 0x0b,
- op1_ahi = 0xa7, op2_ahi = 0x0a,
- op1_agfi = 0xc2, op2_agfi = 0x08,
- op1_afi = 0xc2, op2_afi = 0x09,
- op1_algfi= 0xc2, op2_algfi= 0x0a,
- op1_alfi = 0xc2, op2_alfi = 0x0b,
- op_ar = 0x1a,
- op_agr = 0xb908,
- op_a = 0x5a,
- op1_ay = 0xe3, op2_ay = 0x5a,
- op1_ag = 0xe3, op2_ag = 0x08,
- op1_slgfi= 0xc2, op2_slgfi= 0x04,
- op1_slfi = 0xc2, op2_slfi = 0x05,
- op_sr = 0x1b,
- op_sgr = 0xb909,
- op_s = 0x5b,
- op1_sy = 0xe3, op2_sy = 0x5b,
- op1_sg = 0xe3, op2_sg = 0x09,
- op_nr = 0x14,
- op_ngr = 0xb980,
- op_la = 0x41,
- op1_lay = 0xe3, op2_lay = 0x71,
- op1_larl = 0xc0, op2_larl = 0x00,
- op_basr = 0x0d,
- op_bas = 0x4d,
- op_bcr = 0x07,
- op_bc = 0x0d,
- op_bctr = 0x06,
- op_bctgr = 0xb946,
- op_bct = 0x46,
- op1_bctg = 0xe3, op2_bctg = 0x46,
- op_bxh = 0x86,
- op1_bxhg = 0xeb, op2_bxhg = 0x44,
- op_bxle = 0x87,
- op1_bxleg= 0xeb, op2_bxleg= 0x45,
- op1_bras = 0xa7, op2_bras = 0x05,
- op1_brasl= 0xc0, op2_brasl= 0x05,
- op1_brc = 0xa7, op2_brc = 0x04,
- op1_brcl = 0xc0, op2_brcl = 0x04,
- op1_brct = 0xa7, op2_brct = 0x06,
- op1_brctg= 0xa7, op2_brctg= 0x07,
- op_brxh = 0x84,
- op1_brxhg= 0xec, op2_brxhg= 0x44,
- op_brxle = 0x85,
- op1_brxlg= 0xec, op2_brxlg= 0x45,
- op_svc = 0x0a,
- };
-
-
-/* Read a single instruction from address AT. */
-
-#define S390_MAX_INSTR_SIZE 6
-static int
-s390_readinstruction (bfd_byte instr[], CORE_ADDR at)
-{
- static int s390_instrlen[] = { 2, 4, 4, 6 };
- int instrlen;
-
- if (target_read_memory (at, &instr[0], 2))
- return -1;
- instrlen = s390_instrlen[instr[0] >> 6];
- if (instrlen > 2)
- {
- if (target_read_memory (at + 2, &instr[2], instrlen - 2))
- return -1;
- }
- return instrlen;
-}
-
-
-/* The functions below are for recognizing and decoding S/390
- instructions of various formats. Each of them checks whether INSN
- is an instruction of the given format, with the specified opcodes.
- If it is, it sets the remaining arguments to the values of the
- instruction's fields, and returns a non-zero value; otherwise, it
- returns zero.
-
- These functions' arguments appear in the order they appear in the
- instruction, not in the machine-language form. So, opcodes always
- come first, even though they're sometimes scattered around the
- instructions. And displacements appear before base and extension
- registers, as they do in the assembly syntax, not at the end, as
- they do in the machine language. */
-static int
-is_ri (bfd_byte *insn, int op1, int op2, unsigned int *r1, int *i2)
-{
- if (insn[0] == op1 && (insn[1] & 0xf) == op2)
- {
- *r1 = (insn[1] >> 4) & 0xf;
- /* i2 is a 16-bit signed quantity. */
- *i2 = (((insn[2] << 8) | insn[3]) ^ 0x8000) - 0x8000;
- return 1;
- }
- else
- return 0;
-}
-
-
-static int
-is_ril (bfd_byte *insn, int op1, int op2,
- unsigned int *r1, int *i2)
-{
- if (insn[0] == op1 && (insn[1] & 0xf) == op2)
- {
- *r1 = (insn[1] >> 4) & 0xf;
- /* i2 is a signed quantity. If the host 'int' is 32 bits long,
- no sign extension is necessary, but we don't want to assume
- that. */
- *i2 = (((insn[2] << 24)
- | (insn[3] << 16)
- | (insn[4] << 8)
- | (insn[5])) ^ 0x80000000) - 0x80000000;
- return 1;
- }
- else
- return 0;
-}
+ || (REG_VALID
+ == regcache->get_register_status (S390_TDB_DWORD0_REGNUM))))
+ cb (".reg-s390-tdb", s390_sizeof_tdbregset, s390_sizeof_tdbregset,
+ &s390_tdb_regset, "s390 TDB", cb_data);
-
-static int
-is_rr (bfd_byte *insn, int op, unsigned int *r1, unsigned int *r2)
-{
- if (insn[0] == op)
+ if (tdep->v0_full_regnum != -1)
{
- *r1 = (insn[1] >> 4) & 0xf;
- *r2 = insn[1] & 0xf;
- return 1;
+ cb (".reg-s390-vxrs-low", 16 * 8, 16 * 8, &s390_vxrs_low_regset,
+ "s390 vector registers 0-15 lower half", cb_data);
+ cb (".reg-s390-vxrs-high", 16 * 16, 16 * 16, &s390_vxrs_high_regset,
+ "s390 vector registers 16-31", cb_data);
}
- else
- return 0;
-}
-
-static int
-is_rre (bfd_byte *insn, int op, unsigned int *r1, unsigned int *r2)
-{
- if (((insn[0] << 8) | insn[1]) == op)
+ /* Iterate over the guarded-storage regsets if in "read" mode, or if
+ their registers are available. */
+ if (tdep->have_gs)
{
- /* Yes, insn[3]. insn[2] is unused in RRE format. */
- *r1 = (insn[3] >> 4) & 0xf;
- *r2 = insn[3] & 0xf;
- return 1;
+ if (regcache == NULL
+ || REG_VALID == regcache->get_register_status (S390_GSD_REGNUM))
+ cb (".reg-s390-gs-cb", 4 * 8, 4 * 8, &s390_gs_regset,
+ "s390 guarded-storage registers", cb_data);
+
+ if (regcache == NULL
+ || REG_VALID == regcache->get_register_status (S390_BC_GSD_REGNUM))
+ cb (".reg-s390-gs-bc", 4 * 8, 4 * 8, &s390_gsbc_regset,
+ "s390 guarded-storage broadcast control", cb_data);
}
- else
- return 0;
}
+/* Implement core_read_description gdbarch method. */
-static int
-is_rs (bfd_byte *insn, int op,
- unsigned int *r1, unsigned int *r3, int *d2, unsigned int *b2)
+static const struct target_desc *
+s390_core_read_description (struct gdbarch *gdbarch,
+ struct target_ops *target, bfd *abfd)
{
- if (insn[0] == op)
- {
- *r1 = (insn[1] >> 4) & 0xf;
- *r3 = insn[1] & 0xf;
- *b2 = (insn[2] >> 4) & 0xf;
- *d2 = ((insn[2] & 0xf) << 8) | insn[3];
- return 1;
- }
- else
- return 0;
-}
-
+ asection *section = bfd_get_section_by_name (abfd, ".reg");
+ CORE_ADDR hwcap = linux_get_hwcap (target);
+ bool high_gprs, v1, v2, te, vx, gs;
-static int
-is_rsy (bfd_byte *insn, int op1, int op2,
- unsigned int *r1, unsigned int *r3, int *d2, unsigned int *b2)
-{
- if (insn[0] == op1
- && insn[5] == op2)
- {
- *r1 = (insn[1] >> 4) & 0xf;
- *r3 = insn[1] & 0xf;
- *b2 = (insn[2] >> 4) & 0xf;
- /* The 'long displacement' is a 20-bit signed integer. */
- *d2 = ((((insn[2] & 0xf) << 8) | insn[3] | (insn[4] << 12))
- ^ 0x80000) - 0x80000;
- return 1;
- }
- else
- return 0;
-}
+ if (!section)
+ return NULL;
+ high_gprs = (bfd_get_section_by_name (abfd, ".reg-s390-high-gprs")
+ != NULL);
+ v1 = (bfd_get_section_by_name (abfd, ".reg-s390-last-break") != NULL);
+ v2 = (bfd_get_section_by_name (abfd, ".reg-s390-system-call") != NULL);
+ vx = (hwcap & HWCAP_S390_VX);
+ te = (hwcap & HWCAP_S390_TE);
+ gs = (hwcap & HWCAP_S390_GS);
-static int
-is_rsi (bfd_byte *insn, int op,
- unsigned int *r1, unsigned int *r3, int *i2)
-{
- if (insn[0] == op)
+ switch (bfd_section_size (section))
{
- *r1 = (insn[1] >> 4) & 0xf;
- *r3 = insn[1] & 0xf;
- /* i2 is a 16-bit signed quantity. */
- *i2 = (((insn[2] << 8) | insn[3]) ^ 0x8000) - 0x8000;
- return 1;
- }
- else
- return 0;
-}
-
-
-static int
-is_rie (bfd_byte *insn, int op1, int op2,
- unsigned int *r1, unsigned int *r3, int *i2)
-{
- if (insn[0] == op1
- && insn[5] == op2)
- {
- *r1 = (insn[1] >> 4) & 0xf;
- *r3 = insn[1] & 0xf;
- /* i2 is a 16-bit signed quantity. */
- *i2 = (((insn[2] << 8) | insn[3]) ^ 0x8000) - 0x8000;
- return 1;
- }
- else
- return 0;
-}
-
-
-static int
-is_rx (bfd_byte *insn, int op,
- unsigned int *r1, int *d2, unsigned int *x2, unsigned int *b2)
-{
- if (insn[0] == op)
- {
- *r1 = (insn[1] >> 4) & 0xf;
- *x2 = insn[1] & 0xf;
- *b2 = (insn[2] >> 4) & 0xf;
- *d2 = ((insn[2] & 0xf) << 8) | insn[3];
- return 1;
- }
- else
- return 0;
-}
-
-
-static int
-is_rxy (bfd_byte *insn, int op1, int op2,
- unsigned int *r1, int *d2, unsigned int *x2, unsigned int *b2)
-{
- if (insn[0] == op1
- && insn[5] == op2)
- {
- *r1 = (insn[1] >> 4) & 0xf;
- *x2 = insn[1] & 0xf;
- *b2 = (insn[2] >> 4) & 0xf;
- /* The 'long displacement' is a 20-bit signed integer. */
- *d2 = ((((insn[2] & 0xf) << 8) | insn[3] | (insn[4] << 12))
- ^ 0x80000) - 0x80000;
- return 1;
- }
- else
- return 0;
-}
-
-
-/* Prologue analysis. */
-
-#define S390_NUM_GPRS 16
-#define S390_NUM_FPRS 16
-
-struct s390_prologue_data {
-
- /* The stack. */
- struct pv_area *stack;
-
- /* The size and byte-order of a GPR or FPR. */
- int gpr_size;
- int fpr_size;
- enum bfd_endian byte_order;
-
- /* The general-purpose registers. */
- pv_t gpr[S390_NUM_GPRS];
-
- /* The floating-point registers. */
- pv_t fpr[S390_NUM_FPRS];
-
- /* The offset relative to the CFA where the incoming GPR N was saved
- by the function prologue. 0 if not saved or unknown. */
- int gpr_slot[S390_NUM_GPRS];
-
- /* Likewise for FPRs. */
- int fpr_slot[S390_NUM_FPRS];
-
- /* Nonzero if the backchain was saved. This is assumed to be the
- case when the incoming SP is saved at the current SP location. */
- int back_chain_saved_p;
-};
-
-/* Return the effective address for an X-style instruction, like:
-
- L R1, D2(X2, B2)
-
- Here, X2 and B2 are registers, and D2 is a signed 20-bit
- constant; the effective address is the sum of all three. If either
- X2 or B2 are zero, then it doesn't contribute to the sum --- this
- means that r0 can't be used as either X2 or B2. */
-static pv_t
-s390_addr (struct s390_prologue_data *data,
- int d2, unsigned int x2, unsigned int b2)
-{
- pv_t result;
-
- result = pv_constant (d2);
- if (x2)
- result = pv_add (result, data->gpr[x2]);
- if (b2)
- result = pv_add (result, data->gpr[b2]);
-
- return result;
-}
-
-/* Do a SIZE-byte store of VALUE to D2(X2,B2). */
-static void
-s390_store (struct s390_prologue_data *data,
- int d2, unsigned int x2, unsigned int b2, CORE_ADDR size,
- pv_t value)
-{
- pv_t addr = s390_addr (data, d2, x2, b2);
- pv_t offset;
-
- /* Check whether we are storing the backchain. */
- offset = pv_subtract (data->gpr[S390_SP_REGNUM - S390_R0_REGNUM], addr);
-
- if (pv_is_constant (offset) && offset.k == 0)
- if (size == data->gpr_size
- && pv_is_register_k (value, S390_SP_REGNUM, 0))
- {
- data->back_chain_saved_p = 1;
- return;
- }
-
-
- /* Check whether we are storing a register into the stack. */
- if (!pv_area_store_would_trash (data->stack, addr))
- pv_area_store (data->stack, addr, size, value);
-
-
- /* Note: If this is some store we cannot identify, you might think we
- should forget our cached values, as any of those might have been hit.
-
- However, we make the assumption that the register save areas are only
- ever stored to once in any given function, and we do recognize these
- stores. Thus every store we cannot recognize does not hit our data. */
-}
-
-/* Do a SIZE-byte load from D2(X2,B2). */
-static pv_t
-s390_load (struct s390_prologue_data *data,
- int d2, unsigned int x2, unsigned int b2, CORE_ADDR size)
-
-{
- pv_t addr = s390_addr (data, d2, x2, b2);
-
- /* If it's a load from an in-line constant pool, then we can
- simulate that, under the assumption that the code isn't
- going to change between the time the processor actually
- executed it creating the current frame, and the time when
- we're analyzing the code to unwind past that frame. */
- if (pv_is_constant (addr))
- {
- struct target_section *secp;
- secp = target_section_by_addr (¤t_target, addr.k);
- if (secp != NULL
- && (bfd_get_section_flags (secp->the_bfd_section->owner,
- secp->the_bfd_section)
- & SEC_READONLY))
- return pv_constant (read_memory_integer (addr.k, size,
- data->byte_order));
- }
-
- /* Check whether we are accessing one of our save slots. */
- return pv_area_fetch (data->stack, addr, size);
-}
-
-/* Function for finding saved registers in a 'struct pv_area'; we pass
- this to pv_area_scan.
-
- If VALUE is a saved register, ADDR says it was saved at a constant
- offset from the frame base, and SIZE indicates that the whole
- register was saved, record its offset in the reg_offset table in
- PROLOGUE_UNTYPED. */
-static void
-s390_check_for_saved (void *data_untyped, pv_t addr,
- CORE_ADDR size, pv_t value)
-{
- struct s390_prologue_data *data = data_untyped;
- int i, offset;
-
- if (!pv_is_register (addr, S390_SP_REGNUM))
- return;
-
- offset = 16 * data->gpr_size + 32 - addr.k;
-
- /* If we are storing the original value of a register, we want to
- record the CFA offset. If the same register is stored multiple
- times, the stack slot with the highest address counts. */
-
- for (i = 0; i < S390_NUM_GPRS; i++)
- if (size == data->gpr_size
- && pv_is_register_k (value, S390_R0_REGNUM + i, 0))
- if (data->gpr_slot[i] == 0
- || data->gpr_slot[i] > offset)
- {
- data->gpr_slot[i] = offset;
- return;
- }
-
- for (i = 0; i < S390_NUM_FPRS; i++)
- if (size == data->fpr_size
- && pv_is_register_k (value, S390_F0_REGNUM + i, 0))
- if (data->fpr_slot[i] == 0
- || data->fpr_slot[i] > offset)
- {
- data->fpr_slot[i] = offset;
- return;
- }
-}
-
-/* Analyze the prologue of the function starting at START_PC,
- continuing at most until CURRENT_PC. Initialize DATA to
- hold all information we find out about the state of the registers
- and stack slots. Return the address of the instruction after
- the last one that changed the SP, FP, or back chain; or zero
- on error. */
-static CORE_ADDR
-s390_analyze_prologue (struct gdbarch *gdbarch,
- CORE_ADDR start_pc,
- CORE_ADDR current_pc,
- struct s390_prologue_data *data)
-{
- int word_size = gdbarch_ptr_bit (gdbarch) / 8;
-
- /* Our return value:
- The address of the instruction after the last one that changed
- the SP, FP, or back chain; zero if we got an error trying to
- read memory. */
- CORE_ADDR result = start_pc;
-
- /* The current PC for our abstract interpretation. */
- CORE_ADDR pc;
-
- /* The address of the next instruction after that. */
- CORE_ADDR next_pc;
-
- /* Set up everything's initial value. */
- {
- int i;
-
- data->stack = make_pv_area (S390_SP_REGNUM, gdbarch_addr_bit (gdbarch));
-
- /* For the purpose of prologue tracking, we consider the GPR size to
- be equal to the ABI word size, even if it is actually larger
- (i.e. when running a 32-bit binary under a 64-bit kernel). */
- data->gpr_size = word_size;
- data->fpr_size = 8;
- data->byte_order = gdbarch_byte_order (gdbarch);
-
- for (i = 0; i < S390_NUM_GPRS; i++)
- data->gpr[i] = pv_register (S390_R0_REGNUM + i, 0);
-
- for (i = 0; i < S390_NUM_FPRS; i++)
- data->fpr[i] = pv_register (S390_F0_REGNUM + i, 0);
-
- for (i = 0; i < S390_NUM_GPRS; i++)
- data->gpr_slot[i] = 0;
-
- for (i = 0; i < S390_NUM_FPRS; i++)
- data->fpr_slot[i] = 0;
-
- data->back_chain_saved_p = 0;
- }
-
- /* Start interpreting instructions, until we hit the frame's
- current PC or the first branch instruction. */
- for (pc = start_pc; pc > 0 && pc < current_pc; pc = next_pc)
- {
- bfd_byte insn[S390_MAX_INSTR_SIZE];
- int insn_len = s390_readinstruction (insn, pc);
-
- bfd_byte dummy[S390_MAX_INSTR_SIZE] = { 0 };
- bfd_byte *insn32 = word_size == 4 ? insn : dummy;
- bfd_byte *insn64 = word_size == 8 ? insn : dummy;
-
- /* Fields for various kinds of instructions. */
- unsigned int b2, r1, r2, x2, r3;
- int i2, d2;
-
- /* The values of SP and FP before this instruction,
- for detecting instructions that change them. */
- pv_t pre_insn_sp, pre_insn_fp;
- /* Likewise for the flag whether the back chain was saved. */
- int pre_insn_back_chain_saved_p;
-
- /* If we got an error trying to read the instruction, report it. */
- if (insn_len < 0)
- {
- result = 0;
- break;
- }
-
- next_pc = pc + insn_len;
-
- pre_insn_sp = data->gpr[S390_SP_REGNUM - S390_R0_REGNUM];
- pre_insn_fp = data->gpr[S390_FRAME_REGNUM - S390_R0_REGNUM];
- pre_insn_back_chain_saved_p = data->back_chain_saved_p;
-
-
- /* LHI r1, i2 --- load halfword immediate. */
- /* LGHI r1, i2 --- load halfword immediate (64-bit version). */
- /* LGFI r1, i2 --- load fullword immediate. */
- if (is_ri (insn32, op1_lhi, op2_lhi, &r1, &i2)
- || is_ri (insn64, op1_lghi, op2_lghi, &r1, &i2)
- || is_ril (insn, op1_lgfi, op2_lgfi, &r1, &i2))
- data->gpr[r1] = pv_constant (i2);
-
- /* LR r1, r2 --- load from register. */
- /* LGR r1, r2 --- load from register (64-bit version). */
- else if (is_rr (insn32, op_lr, &r1, &r2)
- || is_rre (insn64, op_lgr, &r1, &r2))
- data->gpr[r1] = data->gpr[r2];
-
- /* L r1, d2(x2, b2) --- load. */
- /* LY r1, d2(x2, b2) --- load (long-displacement version). */
- /* LG r1, d2(x2, b2) --- load (64-bit version). */
- else if (is_rx (insn32, op_l, &r1, &d2, &x2, &b2)
- || is_rxy (insn32, op1_ly, op2_ly, &r1, &d2, &x2, &b2)
- || is_rxy (insn64, op1_lg, op2_lg, &r1, &d2, &x2, &b2))
- data->gpr[r1] = s390_load (data, d2, x2, b2, data->gpr_size);
-
- /* ST r1, d2(x2, b2) --- store. */
- /* STY r1, d2(x2, b2) --- store (long-displacement version). */
- /* STG r1, d2(x2, b2) --- store (64-bit version). */
- else if (is_rx (insn32, op_st, &r1, &d2, &x2, &b2)
- || is_rxy (insn32, op1_sty, op2_sty, &r1, &d2, &x2, &b2)
- || is_rxy (insn64, op1_stg, op2_stg, &r1, &d2, &x2, &b2))
- s390_store (data, d2, x2, b2, data->gpr_size, data->gpr[r1]);
-
- /* STD r1, d2(x2,b2) --- store floating-point register. */
- else if (is_rx (insn, op_std, &r1, &d2, &x2, &b2))
- s390_store (data, d2, x2, b2, data->fpr_size, data->fpr[r1]);
-
- /* STM r1, r3, d2(b2) --- store multiple. */
- /* STMY r1, r3, d2(b2) --- store multiple (long-displacement
- version). */
- /* STMG r1, r3, d2(b2) --- store multiple (64-bit version). */
- else if (is_rs (insn32, op_stm, &r1, &r3, &d2, &b2)
- || is_rsy (insn32, op1_stmy, op2_stmy, &r1, &r3, &d2, &b2)
- || is_rsy (insn64, op1_stmg, op2_stmg, &r1, &r3, &d2, &b2))
- {
- for (; r1 <= r3; r1++, d2 += data->gpr_size)
- s390_store (data, d2, 0, b2, data->gpr_size, data->gpr[r1]);
- }
-
- /* AHI r1, i2 --- add halfword immediate. */
- /* AGHI r1, i2 --- add halfword immediate (64-bit version). */
- /* AFI r1, i2 --- add fullword immediate. */
- /* AGFI r1, i2 --- add fullword immediate (64-bit version). */
- else if (is_ri (insn32, op1_ahi, op2_ahi, &r1, &i2)
- || is_ri (insn64, op1_aghi, op2_aghi, &r1, &i2)
- || is_ril (insn32, op1_afi, op2_afi, &r1, &i2)
- || is_ril (insn64, op1_agfi, op2_agfi, &r1, &i2))
- data->gpr[r1] = pv_add_constant (data->gpr[r1], i2);
-
- /* ALFI r1, i2 --- add logical immediate. */
- /* ALGFI r1, i2 --- add logical immediate (64-bit version). */
- else if (is_ril (insn32, op1_alfi, op2_alfi, &r1, &i2)
- || is_ril (insn64, op1_algfi, op2_algfi, &r1, &i2))
- data->gpr[r1] = pv_add_constant (data->gpr[r1],
- (CORE_ADDR)i2 & 0xffffffff);
-
- /* AR r1, r2 -- add register. */
- /* AGR r1, r2 -- add register (64-bit version). */
- else if (is_rr (insn32, op_ar, &r1, &r2)
- || is_rre (insn64, op_agr, &r1, &r2))
- data->gpr[r1] = pv_add (data->gpr[r1], data->gpr[r2]);
-
- /* A r1, d2(x2, b2) -- add. */
- /* AY r1, d2(x2, b2) -- add (long-displacement version). */
- /* AG r1, d2(x2, b2) -- add (64-bit version). */
- else if (is_rx (insn32, op_a, &r1, &d2, &x2, &b2)
- || is_rxy (insn32, op1_ay, op2_ay, &r1, &d2, &x2, &b2)
- || is_rxy (insn64, op1_ag, op2_ag, &r1, &d2, &x2, &b2))
- data->gpr[r1] = pv_add (data->gpr[r1],
- s390_load (data, d2, x2, b2, data->gpr_size));
-
- /* SLFI r1, i2 --- subtract logical immediate. */
- /* SLGFI r1, i2 --- subtract logical immediate (64-bit version). */
- else if (is_ril (insn32, op1_slfi, op2_slfi, &r1, &i2)
- || is_ril (insn64, op1_slgfi, op2_slgfi, &r1, &i2))
- data->gpr[r1] = pv_add_constant (data->gpr[r1],
- -((CORE_ADDR)i2 & 0xffffffff));
-
- /* SR r1, r2 -- subtract register. */
- /* SGR r1, r2 -- subtract register (64-bit version). */
- else if (is_rr (insn32, op_sr, &r1, &r2)
- || is_rre (insn64, op_sgr, &r1, &r2))
- data->gpr[r1] = pv_subtract (data->gpr[r1], data->gpr[r2]);
-
- /* S r1, d2(x2, b2) -- subtract. */
- /* SY r1, d2(x2, b2) -- subtract (long-displacement version). */
- /* SG r1, d2(x2, b2) -- subtract (64-bit version). */
- else if (is_rx (insn32, op_s, &r1, &d2, &x2, &b2)
- || is_rxy (insn32, op1_sy, op2_sy, &r1, &d2, &x2, &b2)
- || is_rxy (insn64, op1_sg, op2_sg, &r1, &d2, &x2, &b2))
- data->gpr[r1] = pv_subtract (data->gpr[r1],
- s390_load (data, d2, x2, b2, data->gpr_size));
-
- /* LA r1, d2(x2, b2) --- load address. */
- /* LAY r1, d2(x2, b2) --- load address (long-displacement version). */
- else if (is_rx (insn, op_la, &r1, &d2, &x2, &b2)
- || is_rxy (insn, op1_lay, op2_lay, &r1, &d2, &x2, &b2))
- data->gpr[r1] = s390_addr (data, d2, x2, b2);
-
- /* LARL r1, i2 --- load address relative long. */
- else if (is_ril (insn, op1_larl, op2_larl, &r1, &i2))
- data->gpr[r1] = pv_constant (pc + i2 * 2);
-
- /* BASR r1, 0 --- branch and save.
- Since r2 is zero, this saves the PC in r1, but doesn't branch. */
- else if (is_rr (insn, op_basr, &r1, &r2)
- && r2 == 0)
- data->gpr[r1] = pv_constant (next_pc);
-
- /* BRAS r1, i2 --- branch relative and save. */
- else if (is_ri (insn, op1_bras, op2_bras, &r1, &i2))
- {
- data->gpr[r1] = pv_constant (next_pc);
- next_pc = pc + i2 * 2;
-
- /* We'd better not interpret any backward branches. We'll
- never terminate. */
- if (next_pc <= pc)
- break;
- }
-
- /* Terminate search when hitting any other branch instruction. */
- else if (is_rr (insn, op_basr, &r1, &r2)
- || is_rx (insn, op_bas, &r1, &d2, &x2, &b2)
- || is_rr (insn, op_bcr, &r1, &r2)
- || is_rx (insn, op_bc, &r1, &d2, &x2, &b2)
- || is_ri (insn, op1_brc, op2_brc, &r1, &i2)
- || is_ril (insn, op1_brcl, op2_brcl, &r1, &i2)
- || is_ril (insn, op1_brasl, op2_brasl, &r2, &i2))
- break;
-
- else
- {
- /* An instruction we don't know how to simulate. The only
- safe thing to do would be to set every value we're tracking
- to 'unknown'. Instead, we'll be optimistic: we assume that
- we *can* interpret every instruction that the compiler uses
- to manipulate any of the data we're interested in here --
- then we can just ignore anything else. */
- }
-
- /* Record the address after the last instruction that changed
- the FP, SP, or backlink. Ignore instructions that changed
- them back to their original values --- those are probably
- restore instructions. (The back chain is never restored,
- just popped.) */
- {
- pv_t sp = data->gpr[S390_SP_REGNUM - S390_R0_REGNUM];
- pv_t fp = data->gpr[S390_FRAME_REGNUM - S390_R0_REGNUM];
-
- if ((! pv_is_identical (pre_insn_sp, sp)
- && ! pv_is_register_k (sp, S390_SP_REGNUM, 0)
- && sp.kind != pvk_unknown)
- || (! pv_is_identical (pre_insn_fp, fp)
- && ! pv_is_register_k (fp, S390_FRAME_REGNUM, 0)
- && fp.kind != pvk_unknown)
- || pre_insn_back_chain_saved_p != data->back_chain_saved_p)
- result = next_pc;
- }
- }
-
- /* Record where all the registers were saved. */
- pv_area_scan (data->stack, s390_check_for_saved, data);
-
- free_pv_area (data->stack);
- data->stack = NULL;
-
- return result;
-}
-
-/* Advance PC across any function entry prologue instructions to reach
- some "real" code. */
-static CORE_ADDR
-s390_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
-{
- struct s390_prologue_data data;
- CORE_ADDR skip_pc;
- skip_pc = s390_analyze_prologue (gdbarch, pc, (CORE_ADDR)-1, &data);
- return skip_pc ? skip_pc : pc;
-}
-
-/* Return true if we are in the functin's epilogue, i.e. after the
- instruction that destroyed the function's stack frame. */
-static int
-s390_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
-{
- int word_size = gdbarch_ptr_bit (gdbarch) / 8;
-
- /* In frameless functions, there's not frame to destroy and thus
- we don't care about the epilogue.
-
- In functions with frame, the epilogue sequence is a pair of
- a LM-type instruction that restores (amongst others) the
- return register %r14 and the stack pointer %r15, followed
- by a branch 'br %r14' --or equivalent-- that effects the
- actual return.
-
- In that situation, this function needs to return 'true' in
- exactly one case: when pc points to that branch instruction.
-
- Thus we try to disassemble the one instructions immediately
- preceding pc and check whether it is an LM-type instruction
- modifying the stack pointer.
-
- Note that disassembling backwards is not reliable, so there
- is a slight chance of false positives here ... */
-
- bfd_byte insn[6];
- unsigned int r1, r3, b2;
- int d2;
-
- if (word_size == 4
- && !target_read_memory (pc - 4, insn, 4)
- && is_rs (insn, op_lm, &r1, &r3, &d2, &b2)
- && r3 == S390_SP_REGNUM - S390_R0_REGNUM)
- return 1;
-
- if (word_size == 4
- && !target_read_memory (pc - 6, insn, 6)
- && is_rsy (insn, op1_lmy, op2_lmy, &r1, &r3, &d2, &b2)
- && r3 == S390_SP_REGNUM - S390_R0_REGNUM)
- return 1;
-
- if (word_size == 8
- && !target_read_memory (pc - 6, insn, 6)
- && is_rsy (insn, op1_lmg, op2_lmg, &r1, &r3, &d2, &b2)
- && r3 == S390_SP_REGNUM - S390_R0_REGNUM)
- return 1;
-
- return 0;
-}
-
-/* Displaced stepping. */
-
-/* Fix up the state of registers and memory after having single-stepped
- a displaced instruction. */
-static void
-s390_displaced_step_fixup (struct gdbarch *gdbarch,
- struct displaced_step_closure *closure,
- CORE_ADDR from, CORE_ADDR to,
- struct regcache *regs)
-{
- /* Since we use simple_displaced_step_copy_insn, our closure is a
- copy of the instruction. */
- gdb_byte *insn = (gdb_byte *) closure;
- static int s390_instrlen[] = { 2, 4, 4, 6 };
- int insnlen = s390_instrlen[insn[0] >> 6];
-
- /* Fields for various kinds of instructions. */
- unsigned int b2, r1, r2, x2, r3;
- int i2, d2;
-
- /* Get current PC and addressing mode bit. */
- CORE_ADDR pc = regcache_read_pc (regs);
- ULONGEST amode = 0;
-
- if (register_size (gdbarch, S390_PSWA_REGNUM) == 4)
- {
- regcache_cooked_read_unsigned (regs, S390_PSWA_REGNUM, &amode);
- amode &= 0x80000000;
- }
-
- if (debug_displaced)
- fprintf_unfiltered (gdb_stdlog,
- "displaced: (s390) fixup (%s, %s) pc %s len %d amode 0x%x\n",
- paddress (gdbarch, from), paddress (gdbarch, to),
- paddress (gdbarch, pc), insnlen, (int) amode);
-
- /* Handle absolute branch and save instructions. */
- if (is_rr (insn, op_basr, &r1, &r2)
- || is_rx (insn, op_bas, &r1, &d2, &x2, &b2))
- {
- /* Recompute saved return address in R1. */
- regcache_cooked_write_unsigned (regs, S390_R0_REGNUM + r1,
- amode | (from + insnlen));
- }
-
- /* Handle absolute branch instructions. */
- else if (is_rr (insn, op_bcr, &r1, &r2)
- || is_rx (insn, op_bc, &r1, &d2, &x2, &b2)
- || is_rr (insn, op_bctr, &r1, &r2)
- || is_rre (insn, op_bctgr, &r1, &r2)
- || is_rx (insn, op_bct, &r1, &d2, &x2, &b2)
- || is_rxy (insn, op1_bctg, op2_brctg, &r1, &d2, &x2, &b2)
- || is_rs (insn, op_bxh, &r1, &r3, &d2, &b2)
- || is_rsy (insn, op1_bxhg, op2_bxhg, &r1, &r3, &d2, &b2)
- || is_rs (insn, op_bxle, &r1, &r3, &d2, &b2)
- || is_rsy (insn, op1_bxleg, op2_bxleg, &r1, &r3, &d2, &b2))
- {
- /* Update PC iff branch was *not* taken. */
- if (pc == to + insnlen)
- regcache_write_pc (regs, from + insnlen);
- }
-
- /* Handle PC-relative branch and save instructions. */
- else if (is_ri (insn, op1_bras, op2_bras, &r1, &i2)
- || is_ril (insn, op1_brasl, op2_brasl, &r1, &i2))
- {
- /* Update PC. */
- regcache_write_pc (regs, pc - to + from);
- /* Recompute saved return address in R1. */
- regcache_cooked_write_unsigned (regs, S390_R0_REGNUM + r1,
- amode | (from + insnlen));
- }
-
- /* Handle PC-relative branch instructions. */
- else if (is_ri (insn, op1_brc, op2_brc, &r1, &i2)
- || is_ril (insn, op1_brcl, op2_brcl, &r1, &i2)
- || is_ri (insn, op1_brct, op2_brct, &r1, &i2)
- || is_ri (insn, op1_brctg, op2_brctg, &r1, &i2)
- || is_rsi (insn, op_brxh, &r1, &r3, &i2)
- || is_rie (insn, op1_brxhg, op2_brxhg, &r1, &r3, &i2)
- || is_rsi (insn, op_brxle, &r1, &r3, &i2)
- || is_rie (insn, op1_brxlg, op2_brxlg, &r1, &r3, &i2))
- {
- /* Update PC. */
- regcache_write_pc (regs, pc - to + from);
- }
-
- /* Handle LOAD ADDRESS RELATIVE LONG. */
- else if (is_ril (insn, op1_larl, op2_larl, &r1, &i2))
- {
- /* Update PC. */
- regcache_write_pc (regs, from + insnlen);
- /* Recompute output address in R1. */
- regcache_cooked_write_unsigned (regs, S390_R0_REGNUM + r1,
- amode | (from + i2 * 2));
- }
-
- /* If we executed a breakpoint instruction, point PC right back at it. */
- else if (insn[0] == 0x0 && insn[1] == 0x1)
- regcache_write_pc (regs, from);
-
- /* For any other insn, PC points right after the original instruction. */
- else
- regcache_write_pc (regs, from + insnlen);
-
- if (debug_displaced)
- fprintf_unfiltered (gdb_stdlog,
- "displaced: (s390) pc is now %s\n",
- paddress (gdbarch, regcache_read_pc (regs)));
-}
-
-
-/* Helper routine to unwind pseudo registers. */
-
-static struct value *
-s390_unwind_pseudo_register (struct frame_info *this_frame, int regnum)
-{
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- struct type *type = register_type (gdbarch, regnum);
-
- /* Unwind PC via PSW address. */
- if (regnum == tdep->pc_regnum)
- {
- struct value *val;
-
- val = frame_unwind_register_value (this_frame, S390_PSWA_REGNUM);
- if (!value_optimized_out (val))
- {
- LONGEST pswa = value_as_long (val);
-
- if (TYPE_LENGTH (type) == 4)
- return value_from_pointer (type, pswa & 0x7fffffff);
- else
- return value_from_pointer (type, pswa);
- }
- }
-
- /* Unwind CC via PSW mask. */
- if (regnum == tdep->cc_regnum)
- {
- struct value *val;
-
- val = frame_unwind_register_value (this_frame, S390_PSWM_REGNUM);
- if (!value_optimized_out (val))
- {
- LONGEST pswm = value_as_long (val);
-
- if (TYPE_LENGTH (type) == 4)
- return value_from_longest (type, (pswm >> 12) & 3);
- else
- return value_from_longest (type, (pswm >> 44) & 3);
- }
- }
-
- /* Unwind full GPRs to show at least the lower halves (as the
- upper halves are undefined). */
- if (regnum_is_gpr_full (tdep, regnum))
- {
- int reg = regnum - tdep->gpr_full_regnum;
- struct value *val;
-
- val = frame_unwind_register_value (this_frame, S390_R0_REGNUM + reg);
- if (!value_optimized_out (val))
- return value_cast (type, val);
- }
-
- return allocate_optimized_out_value (type);
-}
-
-static struct value *
-s390_trad_frame_prev_register (struct frame_info *this_frame,
- struct trad_frame_saved_reg saved_regs[],
- int regnum)
-{
- if (regnum < S390_NUM_REGS)
- return trad_frame_get_prev_register (this_frame, saved_regs, regnum);
- else
- return s390_unwind_pseudo_register (this_frame, regnum);
-}
-
-
-/* Normal stack frames. */
-
-struct s390_unwind_cache {
-
- CORE_ADDR func;
- CORE_ADDR frame_base;
- CORE_ADDR local_base;
-
- struct trad_frame_saved_reg *saved_regs;
-};
-
-static int
-s390_prologue_frame_unwind_cache (struct frame_info *this_frame,
- struct s390_unwind_cache *info)
-{
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- int word_size = gdbarch_ptr_bit (gdbarch) / 8;
- struct s390_prologue_data data;
- pv_t *fp = &data.gpr[S390_FRAME_REGNUM - S390_R0_REGNUM];
- pv_t *sp = &data.gpr[S390_SP_REGNUM - S390_R0_REGNUM];
- int i;
- CORE_ADDR cfa;
- CORE_ADDR func;
- CORE_ADDR result;
- ULONGEST reg;
- CORE_ADDR prev_sp;
- int frame_pointer;
- int size;
- struct frame_info *next_frame;
-
- /* Try to find the function start address. If we can't find it, we don't
- bother searching for it -- with modern compilers this would be mostly
- pointless anyway. Trust that we'll either have valid DWARF-2 CFI data
- or else a valid backchain ... */
- func = get_frame_func (this_frame);
- if (!func)
- return 0;
-
- /* Try to analyze the prologue. */
- result = s390_analyze_prologue (gdbarch, func,
- get_frame_pc (this_frame), &data);
- if (!result)
- return 0;
-
- /* If this was successful, we should have found the instruction that
- sets the stack pointer register to the previous value of the stack
- pointer minus the frame size. */
- if (!pv_is_register (*sp, S390_SP_REGNUM))
- return 0;
-
- /* A frame size of zero at this point can mean either a real
- frameless function, or else a failure to find the prologue.
- Perform some sanity checks to verify we really have a
- frameless function. */
- if (sp->k == 0)
- {
- /* If the next frame is a NORMAL_FRAME, this frame *cannot* have frame
- size zero. This is only possible if the next frame is a sentinel
- frame, a dummy frame, or a signal trampoline frame. */
- /* FIXME: cagney/2004-05-01: This sanity check shouldn't be
- needed, instead the code should simpliy rely on its
- analysis. */
- next_frame = get_next_frame (this_frame);
- while (next_frame && get_frame_type (next_frame) == INLINE_FRAME)
- next_frame = get_next_frame (next_frame);
- if (next_frame
- && get_frame_type (get_next_frame (this_frame)) == NORMAL_FRAME)
- return 0;
-
- /* If we really have a frameless function, %r14 must be valid
- -- in particular, it must point to a different function. */
- reg = get_frame_register_unsigned (this_frame, S390_RETADDR_REGNUM);
- reg = gdbarch_addr_bits_remove (gdbarch, reg) - 1;
- if (get_pc_function_start (reg) == func)
- {
- /* However, there is one case where it *is* valid for %r14
- to point to the same function -- if this is a recursive
- call, and we have stopped in the prologue *before* the
- stack frame was allocated.
-
- Recognize this case by looking ahead a bit ... */
-
- struct s390_prologue_data data2;
- pv_t *sp = &data2.gpr[S390_SP_REGNUM - S390_R0_REGNUM];
-
- if (!(s390_analyze_prologue (gdbarch, func, (CORE_ADDR)-1, &data2)
- && pv_is_register (*sp, S390_SP_REGNUM)
- && sp->k != 0))
- return 0;
- }
- }
-
-
- /* OK, we've found valid prologue data. */
- size = -sp->k;
-
- /* If the frame pointer originally also holds the same value
- as the stack pointer, we're probably using it. If it holds
- some other value -- even a constant offset -- it is most
- likely used as temp register. */
- if (pv_is_identical (*sp, *fp))
- frame_pointer = S390_FRAME_REGNUM;
- else
- frame_pointer = S390_SP_REGNUM;
-
- /* If we've detected a function with stack frame, we'll still have to
- treat it as frameless if we're currently within the function epilog
- code at a point where the frame pointer has already been restored.
- This can only happen in an innermost frame. */
- /* FIXME: cagney/2004-05-01: This sanity check shouldn't be needed,
- instead the code should simpliy rely on its analysis. */
- next_frame = get_next_frame (this_frame);
- while (next_frame && get_frame_type (next_frame) == INLINE_FRAME)
- next_frame = get_next_frame (next_frame);
- if (size > 0
- && (next_frame == NULL
- || get_frame_type (get_next_frame (this_frame)) != NORMAL_FRAME))
- {
- /* See the comment in s390_in_function_epilogue_p on why this is
- not completely reliable ... */
- if (s390_in_function_epilogue_p (gdbarch, get_frame_pc (this_frame)))
- {
- memset (&data, 0, sizeof (data));
- size = 0;
- frame_pointer = S390_SP_REGNUM;
- }
- }
-
- /* Once we know the frame register and the frame size, we can unwind
- the current value of the frame register from the next frame, and
- add back the frame size to arrive that the previous frame's
- stack pointer value. */
- prev_sp = get_frame_register_unsigned (this_frame, frame_pointer) + size;
- cfa = prev_sp + 16*word_size + 32;
-
- /* Set up ABI call-saved/call-clobbered registers. */
- for (i = 0; i < S390_NUM_REGS; i++)
- if (!s390_register_call_saved (gdbarch, i))
- trad_frame_set_unknown (info->saved_regs, i);
-
- /* CC is always call-clobbered. */
- trad_frame_set_unknown (info->saved_regs, S390_PSWM_REGNUM);
-
- /* Record the addresses of all register spill slots the prologue parser
- has recognized. Consider only registers defined as call-saved by the
- ABI; for call-clobbered registers the parser may have recognized
- spurious stores. */
-
- for (i = 0; i < 16; i++)
- if (s390_register_call_saved (gdbarch, S390_R0_REGNUM + i)
- && data.gpr_slot[i] != 0)
- info->saved_regs[S390_R0_REGNUM + i].addr = cfa - data.gpr_slot[i];
-
- for (i = 0; i < 16; i++)
- if (s390_register_call_saved (gdbarch, S390_F0_REGNUM + i)
- && data.fpr_slot[i] != 0)
- info->saved_regs[S390_F0_REGNUM + i].addr = cfa - data.fpr_slot[i];
-
- /* Function return will set PC to %r14. */
- info->saved_regs[S390_PSWA_REGNUM] = info->saved_regs[S390_RETADDR_REGNUM];
-
- /* In frameless functions, we unwind simply by moving the return
- address to the PC. However, if we actually stored to the
- save area, use that -- we might only think the function frameless
- because we're in the middle of the prologue ... */
- if (size == 0
- && !trad_frame_addr_p (info->saved_regs, S390_PSWA_REGNUM))
- {
- info->saved_regs[S390_PSWA_REGNUM].realreg = S390_RETADDR_REGNUM;
- }
-
- /* Another sanity check: unless this is a frameless function,
- we should have found spill slots for SP and PC.
- If not, we cannot unwind further -- this happens e.g. in
- libc's thread_start routine. */
- if (size > 0)
- {
- if (!trad_frame_addr_p (info->saved_regs, S390_SP_REGNUM)
- || !trad_frame_addr_p (info->saved_regs, S390_PSWA_REGNUM))
- prev_sp = -1;
- }
-
- /* We use the current value of the frame register as local_base,
- and the top of the register save area as frame_base. */
- if (prev_sp != -1)
- {
- info->frame_base = prev_sp + 16*word_size + 32;
- info->local_base = prev_sp - size;
- }
-
- info->func = func;
- return 1;
-}
-
-static void
-s390_backchain_frame_unwind_cache (struct frame_info *this_frame,
- struct s390_unwind_cache *info)
-{
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- int word_size = gdbarch_ptr_bit (gdbarch) / 8;
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- CORE_ADDR backchain;
- ULONGEST reg;
- LONGEST sp;
- int i;
-
- /* Set up ABI call-saved/call-clobbered registers. */
- for (i = 0; i < S390_NUM_REGS; i++)
- if (!s390_register_call_saved (gdbarch, i))
- trad_frame_set_unknown (info->saved_regs, i);
-
- /* CC is always call-clobbered. */
- trad_frame_set_unknown (info->saved_regs, S390_PSWM_REGNUM);
-
- /* Get the backchain. */
- reg = get_frame_register_unsigned (this_frame, S390_SP_REGNUM);
- backchain = read_memory_unsigned_integer (reg, word_size, byte_order);
-
- /* A zero backchain terminates the frame chain. As additional
- sanity check, let's verify that the spill slot for SP in the
- save area pointed to by the backchain in fact links back to
- the save area. */
- if (backchain != 0
- && safe_read_memory_integer (backchain + 15*word_size,
- word_size, byte_order, &sp)
- && (CORE_ADDR)sp == backchain)
- {
- /* We don't know which registers were saved, but it will have
- to be at least %r14 and %r15. This will allow us to continue
- unwinding, but other prev-frame registers may be incorrect ... */
- info->saved_regs[S390_SP_REGNUM].addr = backchain + 15*word_size;
- info->saved_regs[S390_RETADDR_REGNUM].addr = backchain + 14*word_size;
-
- /* Function return will set PC to %r14. */
- info->saved_regs[S390_PSWA_REGNUM]
- = info->saved_regs[S390_RETADDR_REGNUM];
-
- /* We use the current value of the frame register as local_base,
- and the top of the register save area as frame_base. */
- info->frame_base = backchain + 16*word_size + 32;
- info->local_base = reg;
- }
-
- info->func = get_frame_pc (this_frame);
-}
-
-static struct s390_unwind_cache *
-s390_frame_unwind_cache (struct frame_info *this_frame,
- void **this_prologue_cache)
-{
- volatile struct gdb_exception ex;
- struct s390_unwind_cache *info;
-
- if (*this_prologue_cache)
- return *this_prologue_cache;
-
- info = FRAME_OBSTACK_ZALLOC (struct s390_unwind_cache);
- *this_prologue_cache = info;
- info->saved_regs = trad_frame_alloc_saved_regs (this_frame);
- info->func = -1;
- info->frame_base = -1;
- info->local_base = -1;
-
- TRY_CATCH (ex, RETURN_MASK_ERROR)
- {
- /* Try to use prologue analysis to fill the unwind cache.
- If this fails, fall back to reading the stack backchain. */
- if (!s390_prologue_frame_unwind_cache (this_frame, info))
- s390_backchain_frame_unwind_cache (this_frame, info);
- }
- if (ex.reason < 0 && ex.error != NOT_AVAILABLE_ERROR)
- throw_exception (ex);
-
- return info;
-}
-
-static void
-s390_frame_this_id (struct frame_info *this_frame,
- void **this_prologue_cache,
- struct frame_id *this_id)
-{
- struct s390_unwind_cache *info
- = s390_frame_unwind_cache (this_frame, this_prologue_cache);
-
- if (info->frame_base == -1)
- return;
-
- *this_id = frame_id_build (info->frame_base, info->func);
-}
-
-static struct value *
-s390_frame_prev_register (struct frame_info *this_frame,
- void **this_prologue_cache, int regnum)
-{
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- struct s390_unwind_cache *info
- = s390_frame_unwind_cache (this_frame, this_prologue_cache);
-
- return s390_trad_frame_prev_register (this_frame, info->saved_regs, regnum);
-}
-
-static const struct frame_unwind s390_frame_unwind = {
- NORMAL_FRAME,
- default_frame_unwind_stop_reason,
- s390_frame_this_id,
- s390_frame_prev_register,
- NULL,
- default_frame_sniffer
-};
-
-
-/* Code stubs and their stack frames. For things like PLTs and NULL
- function calls (where there is no true frame and the return address
- is in the RETADDR register). */
-
-struct s390_stub_unwind_cache
-{
- CORE_ADDR frame_base;
- struct trad_frame_saved_reg *saved_regs;
-};
-
-static struct s390_stub_unwind_cache *
-s390_stub_frame_unwind_cache (struct frame_info *this_frame,
- void **this_prologue_cache)
-{
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- int word_size = gdbarch_ptr_bit (gdbarch) / 8;
- struct s390_stub_unwind_cache *info;
- ULONGEST reg;
-
- if (*this_prologue_cache)
- return *this_prologue_cache;
-
- info = FRAME_OBSTACK_ZALLOC (struct s390_stub_unwind_cache);
- *this_prologue_cache = info;
- info->saved_regs = trad_frame_alloc_saved_regs (this_frame);
-
- /* The return address is in register %r14. */
- info->saved_regs[S390_PSWA_REGNUM].realreg = S390_RETADDR_REGNUM;
-
- /* Retrieve stack pointer and determine our frame base. */
- reg = get_frame_register_unsigned (this_frame, S390_SP_REGNUM);
- info->frame_base = reg + 16*word_size + 32;
-
- return info;
-}
-
-static void
-s390_stub_frame_this_id (struct frame_info *this_frame,
- void **this_prologue_cache,
- struct frame_id *this_id)
-{
- struct s390_stub_unwind_cache *info
- = s390_stub_frame_unwind_cache (this_frame, this_prologue_cache);
- *this_id = frame_id_build (info->frame_base, get_frame_pc (this_frame));
-}
+ case s390_sizeof_gregset:
+ if (high_gprs)
+ return (gs ? tdesc_s390_gs_linux64 :
+ te && vx ? tdesc_s390_tevx_linux64 :
+ vx ? tdesc_s390_vx_linux64 :
+ te ? tdesc_s390_te_linux64 :
+ v2 ? tdesc_s390_linux64v2 :
+ v1 ? tdesc_s390_linux64v1 : tdesc_s390_linux64);
+ else
+ return (v2 ? tdesc_s390_linux32v2 :
+ v1 ? tdesc_s390_linux32v1 : tdesc_s390_linux32);
-static struct value *
-s390_stub_frame_prev_register (struct frame_info *this_frame,
- void **this_prologue_cache, int regnum)
-{
- struct s390_stub_unwind_cache *info
- = s390_stub_frame_unwind_cache (this_frame, this_prologue_cache);
- return s390_trad_frame_prev_register (this_frame, info->saved_regs, regnum);
-}
+ case s390x_sizeof_gregset:
+ return (gs ? tdesc_s390x_gs_linux64 :
+ te && vx ? tdesc_s390x_tevx_linux64 :
+ vx ? tdesc_s390x_vx_linux64 :
+ te ? tdesc_s390x_te_linux64 :
+ v2 ? tdesc_s390x_linux64v2 :
+ v1 ? tdesc_s390x_linux64v1 : tdesc_s390x_linux64);
-static int
-s390_stub_frame_sniffer (const struct frame_unwind *self,
- struct frame_info *this_frame,
- void **this_prologue_cache)
-{
- CORE_ADDR addr_in_block;
- bfd_byte insn[S390_MAX_INSTR_SIZE];
-
- /* If the current PC points to non-readable memory, we assume we
- have trapped due to an invalid function pointer call. We handle
- the non-existing current function like a PLT stub. */
- addr_in_block = get_frame_address_in_block (this_frame);
- if (in_plt_section (addr_in_block)
- || s390_readinstruction (insn, get_frame_pc (this_frame)) < 0)
- return 1;
- return 0;
+ default:
+ return NULL;
+ }
}
-static const struct frame_unwind s390_stub_frame_unwind = {
- NORMAL_FRAME,
- default_frame_unwind_stop_reason,
- s390_stub_frame_this_id,
- s390_stub_frame_prev_register,
- NULL,
- s390_stub_frame_sniffer
-};
-
+/* Frame unwinding. */
/* Signal trampoline stack frames. */
struct trad_frame_saved_reg *saved_regs;
};
+/* Unwind THIS_FRAME and return the corresponding unwind cache for
+ s390_sigtramp_frame_unwind. */
+
static struct s390_sigtramp_unwind_cache *
s390_sigtramp_frame_unwind_cache (struct frame_info *this_frame,
void **this_prologue_cache)
int i;
if (*this_prologue_cache)
- return *this_prologue_cache;
+ return (struct s390_sigtramp_unwind_cache *) *this_prologue_cache;
info = FRAME_OBSTACK_ZALLOC (struct s390_sigtramp_unwind_cache);
*this_prologue_cache = info;
return info;
}
+/* Implement this_id frame_unwind method for s390_sigtramp_frame_unwind. */
+
static void
s390_sigtramp_frame_this_id (struct frame_info *this_frame,
void **this_prologue_cache,
*this_id = frame_id_build (info->frame_base, get_frame_pc (this_frame));
}
+/* Implement prev_register frame_unwind method for sigtramp frames. */
+
static struct value *
s390_sigtramp_frame_prev_register (struct frame_info *this_frame,
void **this_prologue_cache, int regnum)
return s390_trad_frame_prev_register (this_frame, info->saved_regs, regnum);
}
+/* Implement sniffer frame_unwind method for sigtramp frames. */
+
static int
s390_sigtramp_frame_sniffer (const struct frame_unwind *self,
struct frame_info *this_frame,
return 1;
}
+/* S390 sigtramp frame unwinder. */
+
static const struct frame_unwind s390_sigtramp_frame_unwind = {
SIGTRAMP_FRAME,
default_frame_unwind_stop_reason,
s390_sigtramp_frame_sniffer
};
+/* Syscall handling. */
+
/* Retrieve the syscall number at a ptrace syscall-stop. Return -1
upon error. */
static LONGEST
s390_linux_get_syscall_number (struct gdbarch *gdbarch,
- ptid_t ptid)
+ thread_info *thread)
{
- struct regcache *regs = get_thread_regcache (ptid);
+ struct regcache *regs = get_thread_regcache (thread);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
ULONGEST pc;
return svc_number;
}
+/* Process record-replay */
-/* Frame base handling. */
-
-static CORE_ADDR
-s390_frame_base_address (struct frame_info *this_frame, void **this_cache)
-{
- struct s390_unwind_cache *info
- = s390_frame_unwind_cache (this_frame, this_cache);
- return info->frame_base;
-}
-
-static CORE_ADDR
-s390_local_base_address (struct frame_info *this_frame, void **this_cache)
-{
- struct s390_unwind_cache *info
- = s390_frame_unwind_cache (this_frame, this_cache);
- return info->local_base;
-}
-
-static const struct frame_base s390_frame_base = {
- &s390_frame_unwind,
- s390_frame_base_address,
- s390_local_base_address,
- s390_local_base_address
-};
-
-static CORE_ADDR
-s390_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- ULONGEST pc;
- pc = frame_unwind_register_unsigned (next_frame, tdep->pc_regnum);
- return gdbarch_addr_bits_remove (gdbarch, pc);
-}
-
-static CORE_ADDR
-s390_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
- ULONGEST sp;
- sp = frame_unwind_register_unsigned (next_frame, S390_SP_REGNUM);
- return gdbarch_addr_bits_remove (gdbarch, sp);
-}
-
-
-/* DWARF-2 frame support. */
+static struct linux_record_tdep s390_linux_record_tdep;
+static struct linux_record_tdep s390x_linux_record_tdep;
-static struct value *
-s390_dwarf2_prev_register (struct frame_info *this_frame, void **this_cache,
- int regnum)
-{
- return s390_unwind_pseudo_register (this_frame, regnum);
-}
+/* Record all registers but PC register for process-record. */
-static void
-s390_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
- struct dwarf2_frame_state_reg *reg,
- struct frame_info *this_frame)
+static int
+s390_all_but_pc_registers_record (struct regcache *regcache)
{
+ struct gdbarch *gdbarch = regcache->arch ();
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int i;
- /* The condition code (and thus PSW mask) is call-clobbered. */
- if (regnum == S390_PSWM_REGNUM)
- reg->how = DWARF2_FRAME_REG_UNDEFINED;
-
- /* The PSW address unwinds to the return address. */
- else if (regnum == S390_PSWA_REGNUM)
- reg->how = DWARF2_FRAME_REG_RA;
-
- /* Fixed registers are call-saved or call-clobbered
- depending on the ABI in use. */
- else if (regnum < S390_NUM_REGS)
- {
- if (s390_register_call_saved (gdbarch, regnum))
- reg->how = DWARF2_FRAME_REG_SAME_VALUE;
- else
- reg->how = DWARF2_FRAME_REG_UNDEFINED;
- }
-
- /* We install a special function to unwind pseudos. */
- else
+ for (i = 0; i < 16; i++)
{
- reg->how = DWARF2_FRAME_REG_FN;
- reg->loc.fn = s390_dwarf2_prev_register;
+ if (record_full_arch_list_add_reg (regcache, S390_R0_REGNUM + i))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, S390_A0_REGNUM + i))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, S390_F0_REGNUM + i))
+ return -1;
+ if (tdep->gpr_full_regnum != -1)
+ if (record_full_arch_list_add_reg (regcache, S390_R0_UPPER_REGNUM + i))
+ return -1;
+ if (tdep->v0_full_regnum != -1)
+ {
+ if (record_full_arch_list_add_reg (regcache, S390_V0_LOWER_REGNUM + i))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, S390_V16_REGNUM + i))
+ return -1;
+ }
}
-}
-
-
-/* Dummy function calls. */
-
-/* Return non-zero if TYPE is an integer-like type, zero otherwise.
- "Integer-like" types are those that should be passed the way
- integers are: integers, enums, ranges, characters, and booleans. */
-static int
-is_integer_like (struct type *type)
-{
- enum type_code code = TYPE_CODE (type);
-
- return (code == TYPE_CODE_INT
- || code == TYPE_CODE_ENUM
- || code == TYPE_CODE_RANGE
- || code == TYPE_CODE_CHAR
- || code == TYPE_CODE_BOOL);
-}
-
-/* Return non-zero if TYPE is a pointer-like type, zero otherwise.
- "Pointer-like" types are those that should be passed the way
- pointers are: pointers and references. */
-static int
-is_pointer_like (struct type *type)
-{
- enum type_code code = TYPE_CODE (type);
+ if (record_full_arch_list_add_reg (regcache, S390_PSWM_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, S390_FPC_REGNUM))
+ return -1;
- return (code == TYPE_CODE_PTR
- || code == TYPE_CODE_REF);
+ return 0;
}
+/* Canonicalize system call SYSCALL belonging to ABI. Helper for
+ s390_linux_syscall_record. */
-/* Return non-zero if TYPE is a `float singleton' or `double
- singleton', zero otherwise.
-
- A `T singleton' is a struct type with one member, whose type is
- either T or a `T singleton'. So, the following are all float
- singletons:
-
- struct { float x };
- struct { struct { float x; } x; };
- struct { struct { struct { float x; } x; } x; };
-
- ... and so on.
-
- All such structures are passed as if they were floats or doubles,
- as the (revised) ABI says. */
-static int
-is_float_singleton (struct type *type)
+static enum gdb_syscall
+s390_canonicalize_syscall (int syscall, enum s390_abi_kind abi)
{
- if (TYPE_CODE (type) == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1)
+ switch (syscall)
{
- struct type *singleton_type = TYPE_FIELD_TYPE (type, 0);
- CHECK_TYPEDEF (singleton_type);
+ /* s390 syscall numbers < 222 are mostly the same as x86, so just list
+ the exceptions. */
+ case 0:
+ return gdb_sys_no_syscall;
+ case 7:
+ return gdb_sys_restart_syscall;
+ /* These syscalls work only on 31-bit. */
+ case 13: /* time */
+ case 16: /* lchown[16] */
+ case 23: /* setuid[16] */
+ case 24: /* getuid[16] */
+ case 25: /* stime */
+ case 46: /* setgid[16] */
+ case 47: /* getgid[16] */
+ case 49: /* seteuid[16] */
+ case 50: /* getegid[16] */
+ case 70: /* setreuid[16] */
+ case 71: /* setregid[16] */
+ case 76: /* [old_]getrlimit */
+ case 80: /* getgroups[16] */
+ case 81: /* setgroups[16] */
+ case 95: /* fchown[16] */
+ case 101: /* ioperm */
+ case 138: /* setfsuid[16] */
+ case 139: /* setfsgid[16] */
+ case 140: /* _llseek */
+ case 164: /* setresuid[16] */
+ case 165: /* getresuid[16] */
+ case 170: /* setresgid[16] */
+ case 171: /* getresgid[16] */
+ case 182: /* chown[16] */
+ case 192: /* mmap2 */
+ case 193: /* truncate64 */
+ case 194: /* ftruncate64 */
+ case 195: /* stat64 */
+ case 196: /* lstat64 */
+ case 197: /* fstat64 */
+ case 221: /* fcntl64 */
+ if (abi == ABI_LINUX_S390)
+ return (enum gdb_syscall) syscall;
+ return gdb_sys_no_syscall;
+ /* These syscalls don't exist on s390. */
+ case 17: /* break */
+ case 18: /* oldstat */
+ case 28: /* oldfstat */
+ case 31: /* stty */
+ case 32: /* gtty */
+ case 35: /* ftime */
+ case 44: /* prof */
+ case 53: /* lock */
+ case 56: /* mpx */
+ case 58: /* ulimit */
+ case 59: /* oldolduname */
+ case 68: /* sgetmask */
+ case 69: /* ssetmask */
+ case 82: /* [old_]select */
+ case 84: /* oldlstat */
+ case 98: /* profil */
+ case 109: /* olduname */
+ case 113: /* vm86old */
+ case 123: /* modify_ldt */
+ case 166: /* vm86 */
+ return gdb_sys_no_syscall;
+ case 110:
+ return gdb_sys_lookup_dcookie;
+ /* Here come the differences. */
+ case 222:
+ return gdb_sys_readahead;
+ case 223:
+ if (abi == ABI_LINUX_S390)
+ return gdb_sys_sendfile64;
+ return gdb_sys_no_syscall;
+ /* 224-235 handled below */
+ case 236:
+ return gdb_sys_gettid;
+ case 237:
+ return gdb_sys_tkill;
+ case 238:
+ return gdb_sys_futex;
+ case 239:
+ return gdb_sys_sched_setaffinity;
+ case 240:
+ return gdb_sys_sched_getaffinity;
+ case 241:
+ return gdb_sys_tgkill;
+ /* 242 reserved */
+ case 243:
+ return gdb_sys_io_setup;
+ case 244:
+ return gdb_sys_io_destroy;
+ case 245:
+ return gdb_sys_io_getevents;
+ case 246:
+ return gdb_sys_io_submit;
+ case 247:
+ return gdb_sys_io_cancel;
+ case 248:
+ return gdb_sys_exit_group;
+ case 249:
+ return gdb_sys_epoll_create;
+ case 250:
+ return gdb_sys_epoll_ctl;
+ case 251:
+ return gdb_sys_epoll_wait;
+ case 252:
+ return gdb_sys_set_tid_address;
+ case 253:
+ return gdb_sys_fadvise64;
+ /* 254-262 handled below */
+ /* 263 reserved */
+ case 264:
+ if (abi == ABI_LINUX_S390)
+ return gdb_sys_fadvise64_64;
+ return gdb_sys_no_syscall;
+ case 265:
+ return gdb_sys_statfs64;
+ case 266:
+ return gdb_sys_fstatfs64;
+ case 267:
+ return gdb_sys_remap_file_pages;
+ /* 268-270 reserved */
+ /* 271-277 handled below */
+ case 278:
+ return gdb_sys_add_key;
+ case 279:
+ return gdb_sys_request_key;
+ case 280:
+ return gdb_sys_keyctl;
+ case 281:
+ return gdb_sys_waitid;
+ /* 282-312 handled below */
+ case 293:
+ if (abi == ABI_LINUX_S390)
+ return gdb_sys_fstatat64;
+ return gdb_sys_newfstatat;
+ /* 313+ not yet supported */
+ default:
+ {
+ int ret;
+
+ /* Most "old" syscalls copied from i386. */
+ if (syscall <= 221)
+ ret = syscall;
+ /* xattr syscalls. */
+ else if (syscall >= 224 && syscall <= 235)
+ ret = syscall + 2;
+ /* timer syscalls. */
+ else if (syscall >= 254 && syscall <= 262)
+ ret = syscall + 5;
+ /* mq_* and kexec_load */
+ else if (syscall >= 271 && syscall <= 277)
+ ret = syscall + 6;
+ /* ioprio_set .. epoll_pwait */
+ else if (syscall >= 282 && syscall <= 312)
+ ret = syscall + 7;
+ else
+ ret = gdb_sys_no_syscall;
- return (TYPE_CODE (singleton_type) == TYPE_CODE_FLT
- || TYPE_CODE (singleton_type) == TYPE_CODE_DECFLOAT
- || is_float_singleton (singleton_type));
+ return (enum gdb_syscall) ret;
+ }
}
-
- return 0;
-}
-
-
-/* Return non-zero if TYPE is a struct-like type, zero otherwise.
- "Struct-like" types are those that should be passed as structs are:
- structs and unions.
-
- As an odd quirk, not mentioned in the ABI, GCC passes float and
- double singletons as if they were a plain float, double, etc. (The
- corresponding union types are handled normally.) So we exclude
- those types here. *shrug* */
-static int
-is_struct_like (struct type *type)
-{
- enum type_code code = TYPE_CODE (type);
-
- return (code == TYPE_CODE_UNION
- || (code == TYPE_CODE_STRUCT && ! is_float_singleton (type)));
-}
-
-
-/* Return non-zero if TYPE is a float-like type, zero otherwise.
- "Float-like" types are those that should be passed as
- floating-point values are.
-
- You'd think this would just be floats, doubles, long doubles, etc.
- But as an odd quirk, not mentioned in the ABI, GCC passes float and
- double singletons as if they were a plain float, double, etc. (The
- corresponding union types are handled normally.) So we include
- those types here. *shrug* */
-static int
-is_float_like (struct type *type)
-{
- return (TYPE_CODE (type) == TYPE_CODE_FLT
- || TYPE_CODE (type) == TYPE_CODE_DECFLOAT
- || is_float_singleton (type));
-}
-
-
-static int
-is_power_of_two (unsigned int n)
-{
- return ((n & (n - 1)) == 0);
-}
-
-/* Return non-zero if TYPE should be passed as a pointer to a copy,
- zero otherwise. */
-static int
-s390_function_arg_pass_by_reference (struct type *type)
-{
- if (TYPE_LENGTH (type) > 8)
- return 1;
-
- return (is_struct_like (type) && !is_power_of_two (TYPE_LENGTH (type)))
- || TYPE_CODE (type) == TYPE_CODE_COMPLEX
- || (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type));
}
-/* Return non-zero if TYPE should be passed in a float register
- if possible. */
-static int
-s390_function_arg_float (struct type *type)
-{
- if (TYPE_LENGTH (type) > 8)
- return 0;
-
- return is_float_like (type);
-}
+/* Record a system call. Returns 0 on success, -1 otherwise.
+ Helper function for s390_process_record. */
-/* Return non-zero if TYPE should be passed in an integer register
- (or a pair of integer registers) if possible. */
static int
-s390_function_arg_integer (struct type *type)
+s390_linux_syscall_record (struct regcache *regcache, LONGEST syscall_native)
{
- if (TYPE_LENGTH (type) > 8)
- return 0;
-
- return is_integer_like (type)
- || is_pointer_like (type)
- || (is_struct_like (type) && is_power_of_two (TYPE_LENGTH (type)));
-}
+ struct gdbarch *gdbarch = regcache->arch ();
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int ret;
+ enum gdb_syscall syscall_gdb;
-/* Return ARG, a `SIMPLE_ARG', sign-extended or zero-extended to a full
- word as required for the ABI. */
-static LONGEST
-extend_simple_arg (struct gdbarch *gdbarch, struct value *arg)
-{
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- struct type *type = check_typedef (value_type (arg));
-
- /* Even structs get passed in the least significant bits of the
- register / memory word. It's not really right to extract them as
- an integer, but it does take care of the extension. */
- if (TYPE_UNSIGNED (type))
- return extract_unsigned_integer (value_contents (arg),
- TYPE_LENGTH (type), byte_order);
- else
- return extract_signed_integer (value_contents (arg),
- TYPE_LENGTH (type), byte_order);
-}
+ /* On s390, syscall number can be passed either as immediate field of svc
+ instruction, or in %r1 (with svc 0). */
+ if (syscall_native == 0)
+ regcache_raw_read_signed (regcache, S390_R1_REGNUM, &syscall_native);
+ syscall_gdb = s390_canonicalize_syscall (syscall_native, tdep->abi);
-/* Return the alignment required by TYPE. */
-static int
-alignment_of (struct type *type)
-{
- int alignment;
-
- if (is_integer_like (type)
- || is_pointer_like (type)
- || TYPE_CODE (type) == TYPE_CODE_FLT
- || TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
- alignment = TYPE_LENGTH (type);
- else if (TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_UNION)
+ if (syscall_gdb < 0)
{
- int i;
-
- alignment = 1;
- for (i = 0; i < TYPE_NFIELDS (type); i++)
- {
- int field_alignment
- = alignment_of (check_typedef (TYPE_FIELD_TYPE (type, i)));
-
- if (field_alignment > alignment)
- alignment = field_alignment;
- }
+ printf_unfiltered (_("Process record and replay target doesn't "
+ "support syscall number %s\n"),
+ plongest (syscall_native));
+ return -1;
}
- else
- alignment = 1;
- /* Check that everything we ever return is a power of two. Lots of
- code doesn't want to deal with aligning things to arbitrary
- boundaries. */
- gdb_assert ((alignment & (alignment - 1)) == 0);
+ if (syscall_gdb == gdb_sys_sigreturn
+ || syscall_gdb == gdb_sys_rt_sigreturn)
+ {
+ if (s390_all_but_pc_registers_record (regcache))
+ return -1;
+ return 0;
+ }
- return alignment;
-}
+ if (tdep->abi == ABI_LINUX_ZSERIES)
+ ret = record_linux_system_call (syscall_gdb, regcache,
+ &s390x_linux_record_tdep);
+ else
+ ret = record_linux_system_call (syscall_gdb, regcache,
+ &s390_linux_record_tdep);
+ if (ret)
+ return ret;
-/* Put the actual parameter values pointed to by ARGS[0..NARGS-1] in
- place to be passed to a function, as specified by the "GNU/Linux
- for S/390 ELF Application Binary Interface Supplement".
+ /* Record the return value of the system call. */
+ if (record_full_arch_list_add_reg (regcache, S390_R2_REGNUM))
+ return -1;
- SP is the current stack pointer. We must put arguments, links,
- padding, etc. whereever they belong, and return the new stack
- pointer value.
+ return 0;
+}
- If STRUCT_RETURN is non-zero, then the function we're calling is
- going to return a structure by value; STRUCT_ADDR is the address of
- a block we've allocated for it on the stack.
+/* Implement process_record_signal gdbarch method. */
- Our caller has taken care of any type promotions needed to satisfy
- prototypes or the old K&R argument-passing rules. */
-static CORE_ADDR
-s390_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
- struct regcache *regcache, CORE_ADDR bp_addr,
- int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
+static int
+s390_linux_record_signal (struct gdbarch *gdbarch, struct regcache *regcache,
+ enum gdb_signal signal)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- int word_size = gdbarch_ptr_bit (gdbarch) / 8;
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ /* There are two kinds of signal frames on s390. rt_sigframe is always
+ the larger one, so don't even bother with sigframe. */
+ const int sizeof_rt_sigframe = (tdep->abi == ABI_LINUX_ZSERIES ?
+ 160 + 8 + 128 + 1024 : 96 + 8 + 128 + 1000);
+ ULONGEST sp;
int i;
- /* If the i'th argument is passed as a reference to a copy, then
- copy_addr[i] is the address of the copy we made. */
- CORE_ADDR *copy_addr = alloca (nargs * sizeof (CORE_ADDR));
-
- /* Reserve space for the reference-to-copy area. */
- for (i = 0; i < nargs; i++)
- {
- struct value *arg = args[i];
- struct type *type = check_typedef (value_type (arg));
-
- if (s390_function_arg_pass_by_reference (type))
- {
- sp -= TYPE_LENGTH (type);
- sp = align_down (sp, alignment_of (type));
- copy_addr[i] = sp;
- }
- }
-
- /* Reserve space for the parameter area. As a conservative
- simplification, we assume that everything will be passed on the
- stack. Since every argument larger than 8 bytes will be
- passed by reference, we use this simple upper bound. */
- sp -= nargs * 8;
-
- /* After all that, make sure it's still aligned on an eight-byte
- boundary. */
- sp = align_down (sp, 8);
-
- /* Allocate the standard frame areas: the register save area, the
- word reserved for the compiler (which seems kind of meaningless),
- and the back chain pointer. */
- sp -= 16*word_size + 32;
-
- /* Now we have the final SP value. Make sure we didn't underflow;
- on 31-bit, this would result in addresses with the high bit set,
- which causes confusion elsewhere. Note that if we error out
- here, stack and registers remain untouched. */
- if (gdbarch_addr_bits_remove (gdbarch, sp) != sp)
- error (_("Stack overflow"));
-
-
- /* Finally, place the actual parameters, working from SP towards
- higher addresses. The code above is supposed to reserve enough
- space for this. */
- {
- int fr = 0;
- int gr = 2;
- CORE_ADDR starg = sp + 16*word_size + 32;
-
- /* A struct is returned using general register 2. */
- if (struct_return)
- {
- regcache_cooked_write_unsigned (regcache, S390_R0_REGNUM + gr,
- struct_addr);
- gr++;
- }
-
- for (i = 0; i < nargs; i++)
- {
- struct value *arg = args[i];
- struct type *type = check_typedef (value_type (arg));
- unsigned length = TYPE_LENGTH (type);
-
- if (s390_function_arg_pass_by_reference (type))
- {
- /* Actually copy the argument contents to the stack slot
- that was reserved above. */
- write_memory (copy_addr[i], value_contents (arg), length);
-
- if (gr <= 6)
- {
- regcache_cooked_write_unsigned (regcache, S390_R0_REGNUM + gr,
- copy_addr[i]);
- gr++;
- }
- else
- {
- write_memory_unsigned_integer (starg, word_size, byte_order,
- copy_addr[i]);
- starg += word_size;
- }
- }
- else if (s390_function_arg_float (type))
- {
- /* The GNU/Linux for S/390 ABI uses FPRs 0 and 2 to pass arguments,
- the GNU/Linux for zSeries ABI uses 0, 2, 4, and 6. */
- if (fr <= (tdep->abi == ABI_LINUX_S390 ? 2 : 6))
- {
- /* When we store a single-precision value in an FP register,
- it occupies the leftmost bits. */
- regcache_cooked_write_part (regcache, S390_F0_REGNUM + fr,
- 0, length, value_contents (arg));
- fr += 2;
- }
- else
- {
- /* When we store a single-precision value in a stack slot,
- it occupies the rightmost bits. */
- starg = align_up (starg + length, word_size);
- write_memory (starg - length, value_contents (arg), length);
- }
- }
- else if (s390_function_arg_integer (type) && length <= word_size)
- {
- if (gr <= 6)
- {
- /* Integer arguments are always extended to word size. */
- regcache_cooked_write_signed (regcache, S390_R0_REGNUM + gr,
- extend_simple_arg (gdbarch,
- arg));
- gr++;
- }
- else
- {
- /* Integer arguments are always extended to word size. */
- write_memory_signed_integer (starg, word_size, byte_order,
- extend_simple_arg (gdbarch, arg));
- starg += word_size;
- }
- }
- else if (s390_function_arg_integer (type) && length == 2*word_size)
- {
- if (gr <= 5)
- {
- regcache_cooked_write (regcache, S390_R0_REGNUM + gr,
- value_contents (arg));
- regcache_cooked_write (regcache, S390_R0_REGNUM + gr + 1,
- value_contents (arg) + word_size);
- gr += 2;
- }
- else
- {
- /* If we skipped r6 because we couldn't fit a DOUBLE_ARG
- in it, then don't go back and use it again later. */
- gr = 7;
-
- write_memory (starg, value_contents (arg), length);
- starg += length;
- }
- }
- else
- internal_error (__FILE__, __LINE__, _("unknown argument type"));
- }
- }
-
- /* Store return PSWA. In 31-bit mode, keep addressing mode bit. */
- if (word_size == 4)
+ for (i = 0; i < 16; i++)
{
- ULONGEST pswa;
- regcache_cooked_read_unsigned (regcache, S390_PSWA_REGNUM, &pswa);
- bp_addr = (bp_addr & 0x7fffffff) | (pswa & 0x80000000);
+ if (record_full_arch_list_add_reg (regcache, S390_R0_REGNUM + i))
+ return -1;
+ if (tdep->gpr_full_regnum != -1)
+ if (record_full_arch_list_add_reg (regcache, S390_R0_UPPER_REGNUM + i))
+ return -1;
}
- regcache_cooked_write_unsigned (regcache, S390_RETADDR_REGNUM, bp_addr);
-
- /* Store updated stack pointer. */
- regcache_cooked_write_unsigned (regcache, S390_SP_REGNUM, sp);
+ if (record_full_arch_list_add_reg (regcache, S390_PSWA_REGNUM))
+ return -1;
+ if (record_full_arch_list_add_reg (regcache, S390_PSWM_REGNUM))
+ return -1;
- /* We need to return the 'stack part' of the frame ID,
- which is actually the top of the register save area. */
- return sp + 16*word_size + 32;
-}
+ /* Record the change in the stack.
+ frame-size = sizeof (struct rt_sigframe) + SIGNAL_FRAMESIZE */
+ regcache_raw_read_unsigned (regcache, S390_SP_REGNUM, &sp);
+ sp -= sizeof_rt_sigframe;
-/* Assuming THIS_FRAME is a dummy, return the frame ID of that
- dummy frame. The frame ID's base needs to match the TOS value
- returned by push_dummy_call, and the PC match the dummy frame's
- breakpoint. */
-static struct frame_id
-s390_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
- int word_size = gdbarch_ptr_bit (gdbarch) / 8;
- CORE_ADDR sp = get_frame_register_unsigned (this_frame, S390_SP_REGNUM);
- sp = gdbarch_addr_bits_remove (gdbarch, sp);
+ if (record_full_arch_list_add_mem (sp, sizeof_rt_sigframe))
+ return -1;
- return frame_id_build (sp + 16*word_size + 32,
- get_frame_pc (this_frame));
-}
+ if (record_full_arch_list_add_end ())
+ return -1;
-static CORE_ADDR
-s390_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
-{
- /* Both the 32- and 64-bit ABI's say that the stack pointer should
- always be aligned on an eight-byte boundary. */
- return (addr & -8);
+ return 0;
}
+/* Initialize linux_record_tdep if not initialized yet. */
-/* Function return value access. */
-
-static enum return_value_convention
-s390_return_value_convention (struct gdbarch *gdbarch, struct type *type)
-{
- if (TYPE_LENGTH (type) > 8)
- return RETURN_VALUE_STRUCT_CONVENTION;
-
- switch (TYPE_CODE (type))
- {
- case TYPE_CODE_STRUCT:
- case TYPE_CODE_UNION:
- case TYPE_CODE_ARRAY:
- case TYPE_CODE_COMPLEX:
- return RETURN_VALUE_STRUCT_CONVENTION;
-
- default:
- return RETURN_VALUE_REGISTER_CONVENTION;
- }
-}
-
-static enum return_value_convention
-s390_return_value (struct gdbarch *gdbarch, struct value *function,
- struct type *type, struct regcache *regcache,
- gdb_byte *out, const gdb_byte *in)
+static void
+s390_init_linux_record_tdep (struct linux_record_tdep *record_tdep,
+ enum s390_abi_kind abi)
{
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- int word_size = gdbarch_ptr_bit (gdbarch) / 8;
- enum return_value_convention rvc;
- int length;
-
- type = check_typedef (type);
- rvc = s390_return_value_convention (gdbarch, type);
- length = TYPE_LENGTH (type);
+ /* These values are the size of the type that will be used in a system
+ call. They are obtained from Linux Kernel source. */
- if (in)
+ if (abi == ABI_LINUX_ZSERIES)
{
- switch (rvc)
- {
- case RETURN_VALUE_REGISTER_CONVENTION:
- if (TYPE_CODE (type) == TYPE_CODE_FLT
- || TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
- {
- /* When we store a single-precision value in an FP register,
- it occupies the leftmost bits. */
- regcache_cooked_write_part (regcache, S390_F0_REGNUM,
- 0, length, in);
- }
- else if (length <= word_size)
- {
- /* Integer arguments are always extended to word size. */
- if (TYPE_UNSIGNED (type))
- regcache_cooked_write_unsigned (regcache, S390_R2_REGNUM,
- extract_unsigned_integer (in, length, byte_order));
- else
- regcache_cooked_write_signed (regcache, S390_R2_REGNUM,
- extract_signed_integer (in, length, byte_order));
- }
- else if (length == 2*word_size)
- {
- regcache_cooked_write (regcache, S390_R2_REGNUM, in);
- regcache_cooked_write (regcache, S390_R3_REGNUM, in + word_size);
- }
- else
- internal_error (__FILE__, __LINE__, _("invalid return type"));
- break;
-
- case RETURN_VALUE_STRUCT_CONVENTION:
- error (_("Cannot set function return value."));
- break;
- }
+ record_tdep->size_pointer = 8;
+ /* no _old_kernel_stat */
+ record_tdep->size_tms = 32;
+ record_tdep->size_loff_t = 8;
+ record_tdep->size_flock = 32;
+ record_tdep->size_ustat = 32;
+ record_tdep->size_old_sigaction = 32;
+ record_tdep->size_old_sigset_t = 8;
+ record_tdep->size_rlimit = 16;
+ record_tdep->size_rusage = 144;
+ record_tdep->size_timeval = 16;
+ record_tdep->size_timezone = 8;
+ /* old_[ug]id_t never used */
+ record_tdep->size_fd_set = 128;
+ record_tdep->size_old_dirent = 280;
+ record_tdep->size_statfs = 88;
+ record_tdep->size_statfs64 = 88;
+ record_tdep->size_sockaddr = 16;
+ record_tdep->size_int = 4;
+ record_tdep->size_long = 8;
+ record_tdep->size_ulong = 8;
+ record_tdep->size_msghdr = 56;
+ record_tdep->size_itimerval = 32;
+ record_tdep->size_stat = 144;
+ /* old_utsname unused */
+ record_tdep->size_sysinfo = 112;
+ record_tdep->size_msqid_ds = 120;
+ record_tdep->size_shmid_ds = 112;
+ record_tdep->size_new_utsname = 390;
+ record_tdep->size_timex = 208;
+ record_tdep->size_mem_dqinfo = 24;
+ record_tdep->size_if_dqblk = 72;
+ record_tdep->size_fs_quota_stat = 80;
+ record_tdep->size_timespec = 16;
+ record_tdep->size_pollfd = 8;
+ record_tdep->size_NFS_FHSIZE = 32;
+ record_tdep->size_knfsd_fh = 132;
+ record_tdep->size_TASK_COMM_LEN = 16;
+ record_tdep->size_sigaction = 32;
+ record_tdep->size_sigset_t = 8;
+ record_tdep->size_siginfo_t = 128;
+ record_tdep->size_cap_user_data_t = 12;
+ record_tdep->size_stack_t = 24;
+ record_tdep->size_off_t = 8;
+ /* stat64 unused */
+ record_tdep->size_gid_t = 4;
+ record_tdep->size_uid_t = 4;
+ record_tdep->size_PAGE_SIZE = 0x1000; /* 4KB */
+ record_tdep->size_flock64 = 32;
+ record_tdep->size_io_event = 32;
+ record_tdep->size_iocb = 64;
+ record_tdep->size_epoll_event = 16;
+ record_tdep->size_itimerspec = 32;
+ record_tdep->size_mq_attr = 64;
+ record_tdep->size_termios = 36;
+ record_tdep->size_termios2 = 44;
+ record_tdep->size_pid_t = 4;
+ record_tdep->size_winsize = 8;
+ record_tdep->size_serial_struct = 72;
+ record_tdep->size_serial_icounter_struct = 80;
+ record_tdep->size_size_t = 8;
+ record_tdep->size_iovec = 16;
+ record_tdep->size_time_t = 8;
}
- else if (out)
- {
- switch (rvc)
- {
- case RETURN_VALUE_REGISTER_CONVENTION:
- if (TYPE_CODE (type) == TYPE_CODE_FLT
- || TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
- {
- /* When we store a single-precision value in an FP register,
- it occupies the leftmost bits. */
- regcache_cooked_read_part (regcache, S390_F0_REGNUM,
- 0, length, out);
- }
- else if (length <= word_size)
- {
- /* Integer arguments occupy the rightmost bits. */
- regcache_cooked_read_part (regcache, S390_R2_REGNUM,
- word_size - length, length, out);
- }
- else if (length == 2*word_size)
- {
- regcache_cooked_read (regcache, S390_R2_REGNUM, out);
- regcache_cooked_read (regcache, S390_R3_REGNUM, out + word_size);
- }
- else
- internal_error (__FILE__, __LINE__, _("invalid return type"));
- break;
-
- case RETURN_VALUE_STRUCT_CONVENTION:
- error (_("Function return value unknown."));
- break;
- }
- }
-
- return rvc;
-}
-
-
-/* Breakpoints. */
-
-static const gdb_byte *
-s390_breakpoint_from_pc (struct gdbarch *gdbarch,
- CORE_ADDR *pcptr, int *lenptr)
-{
- static const gdb_byte breakpoint[] = { 0x0, 0x1 };
-
- *lenptr = sizeof (breakpoint);
- return breakpoint;
-}
-
-
-/* Address handling. */
-
-static CORE_ADDR
-s390_addr_bits_remove (struct gdbarch *gdbarch, CORE_ADDR addr)
-{
- return addr & 0x7fffffff;
-}
-
-static int
-s390_address_class_type_flags (int byte_size, int dwarf2_addr_class)
-{
- if (byte_size == 4)
- return TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1;
- else
- return 0;
-}
-
-static const char *
-s390_address_class_type_flags_to_name (struct gdbarch *gdbarch, int type_flags)
-{
- if (type_flags & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1)
- return "mode32";
- else
- return NULL;
-}
-
-static int
-s390_address_class_name_to_type_flags (struct gdbarch *gdbarch,
- const char *name,
- int *type_flags_ptr)
-{
- if (strcmp (name, "mode32") == 0)
+ else if (abi == ABI_LINUX_S390)
{
- *type_flags_ptr = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1;
- return 1;
+ record_tdep->size_pointer = 4;
+ record_tdep->size__old_kernel_stat = 32;
+ record_tdep->size_tms = 16;
+ record_tdep->size_loff_t = 8;
+ record_tdep->size_flock = 16;
+ record_tdep->size_ustat = 20;
+ record_tdep->size_old_sigaction = 16;
+ record_tdep->size_old_sigset_t = 4;
+ record_tdep->size_rlimit = 8;
+ record_tdep->size_rusage = 72;
+ record_tdep->size_timeval = 8;
+ record_tdep->size_timezone = 8;
+ record_tdep->size_old_gid_t = 2;
+ record_tdep->size_old_uid_t = 2;
+ record_tdep->size_fd_set = 128;
+ record_tdep->size_old_dirent = 268;
+ record_tdep->size_statfs = 64;
+ record_tdep->size_statfs64 = 88;
+ record_tdep->size_sockaddr = 16;
+ record_tdep->size_int = 4;
+ record_tdep->size_long = 4;
+ record_tdep->size_ulong = 4;
+ record_tdep->size_msghdr = 28;
+ record_tdep->size_itimerval = 16;
+ record_tdep->size_stat = 64;
+ /* old_utsname unused */
+ record_tdep->size_sysinfo = 64;
+ record_tdep->size_msqid_ds = 88;
+ record_tdep->size_shmid_ds = 84;
+ record_tdep->size_new_utsname = 390;
+ record_tdep->size_timex = 128;
+ record_tdep->size_mem_dqinfo = 24;
+ record_tdep->size_if_dqblk = 72;
+ record_tdep->size_fs_quota_stat = 80;
+ record_tdep->size_timespec = 8;
+ record_tdep->size_pollfd = 8;
+ record_tdep->size_NFS_FHSIZE = 32;
+ record_tdep->size_knfsd_fh = 132;
+ record_tdep->size_TASK_COMM_LEN = 16;
+ record_tdep->size_sigaction = 20;
+ record_tdep->size_sigset_t = 8;
+ record_tdep->size_siginfo_t = 128;
+ record_tdep->size_cap_user_data_t = 12;
+ record_tdep->size_stack_t = 12;
+ record_tdep->size_off_t = 4;
+ record_tdep->size_stat64 = 104;
+ record_tdep->size_gid_t = 4;
+ record_tdep->size_uid_t = 4;
+ record_tdep->size_PAGE_SIZE = 0x1000; /* 4KB */
+ record_tdep->size_flock64 = 32;
+ record_tdep->size_io_event = 32;
+ record_tdep->size_iocb = 64;
+ record_tdep->size_epoll_event = 16;
+ record_tdep->size_itimerspec = 16;
+ record_tdep->size_mq_attr = 32;
+ record_tdep->size_termios = 36;
+ record_tdep->size_termios2 = 44;
+ record_tdep->size_pid_t = 4;
+ record_tdep->size_winsize = 8;
+ record_tdep->size_serial_struct = 60;
+ record_tdep->size_serial_icounter_struct = 80;
+ record_tdep->size_size_t = 4;
+ record_tdep->size_iovec = 8;
+ record_tdep->size_time_t = 4;
}
- else
- return 0;
-}
-/* Implementation of `gdbarch_stap_is_single_operand', as defined in
- gdbarch.h. */
+ /* These values are the second argument of system call "sys_fcntl"
+ and "sys_fcntl64". They are obtained from Linux Kernel source. */
+ record_tdep->fcntl_F_GETLK = 5;
+ record_tdep->fcntl_F_GETLK64 = 12;
+ record_tdep->fcntl_F_SETLK64 = 13;
+ record_tdep->fcntl_F_SETLKW64 = 14;
+
+ record_tdep->arg1 = S390_R2_REGNUM;
+ record_tdep->arg2 = S390_R3_REGNUM;
+ record_tdep->arg3 = S390_R4_REGNUM;
+ record_tdep->arg4 = S390_R5_REGNUM;
+ record_tdep->arg5 = S390_R6_REGNUM;
+
+ /* These values are the second argument of system call "sys_ioctl".
+ They are obtained from Linux Kernel source.
+ See arch/s390/include/uapi/asm/ioctls.h. */
+
+ record_tdep->ioctl_TCGETS = 0x5401;
+ record_tdep->ioctl_TCSETS = 0x5402;
+ record_tdep->ioctl_TCSETSW = 0x5403;
+ record_tdep->ioctl_TCSETSF = 0x5404;
+ record_tdep->ioctl_TCGETA = 0x5405;
+ record_tdep->ioctl_TCSETA = 0x5406;
+ record_tdep->ioctl_TCSETAW = 0x5407;
+ record_tdep->ioctl_TCSETAF = 0x5408;
+ record_tdep->ioctl_TCSBRK = 0x5409;
+ record_tdep->ioctl_TCXONC = 0x540a;
+ record_tdep->ioctl_TCFLSH = 0x540b;
+ record_tdep->ioctl_TIOCEXCL = 0x540c;
+ record_tdep->ioctl_TIOCNXCL = 0x540d;
+ record_tdep->ioctl_TIOCSCTTY = 0x540e;
+ record_tdep->ioctl_TIOCGPGRP = 0x540f;
+ record_tdep->ioctl_TIOCSPGRP = 0x5410;
+ record_tdep->ioctl_TIOCOUTQ = 0x5411;
+ record_tdep->ioctl_TIOCSTI = 0x5412;
+ record_tdep->ioctl_TIOCGWINSZ = 0x5413;
+ record_tdep->ioctl_TIOCSWINSZ = 0x5414;
+ record_tdep->ioctl_TIOCMGET = 0x5415;
+ record_tdep->ioctl_TIOCMBIS = 0x5416;
+ record_tdep->ioctl_TIOCMBIC = 0x5417;
+ record_tdep->ioctl_TIOCMSET = 0x5418;
+ record_tdep->ioctl_TIOCGSOFTCAR = 0x5419;
+ record_tdep->ioctl_TIOCSSOFTCAR = 0x541a;
+ record_tdep->ioctl_FIONREAD = 0x541b;
+ record_tdep->ioctl_TIOCINQ = 0x541b; /* alias */
+ record_tdep->ioctl_TIOCLINUX = 0x541c;
+ record_tdep->ioctl_TIOCCONS = 0x541d;
+ record_tdep->ioctl_TIOCGSERIAL = 0x541e;
+ record_tdep->ioctl_TIOCSSERIAL = 0x541f;
+ record_tdep->ioctl_TIOCPKT = 0x5420;
+ record_tdep->ioctl_FIONBIO = 0x5421;
+ record_tdep->ioctl_TIOCNOTTY = 0x5422;
+ record_tdep->ioctl_TIOCSETD = 0x5423;
+ record_tdep->ioctl_TIOCGETD = 0x5424;
+ record_tdep->ioctl_TCSBRKP = 0x5425;
+ record_tdep->ioctl_TIOCSBRK = 0x5427;
+ record_tdep->ioctl_TIOCCBRK = 0x5428;
+ record_tdep->ioctl_TIOCGSID = 0x5429;
+ record_tdep->ioctl_TCGETS2 = 0x802c542a;
+ record_tdep->ioctl_TCSETS2 = 0x402c542b;
+ record_tdep->ioctl_TCSETSW2 = 0x402c542c;
+ record_tdep->ioctl_TCSETSF2 = 0x402c542d;
+ record_tdep->ioctl_TIOCGPTN = 0x80045430;
+ record_tdep->ioctl_TIOCSPTLCK = 0x40045431;
+ record_tdep->ioctl_FIONCLEX = 0x5450;
+ record_tdep->ioctl_FIOCLEX = 0x5451;
+ record_tdep->ioctl_FIOASYNC = 0x5452;
+ record_tdep->ioctl_TIOCSERCONFIG = 0x5453;
+ record_tdep->ioctl_TIOCSERGWILD = 0x5454;
+ record_tdep->ioctl_TIOCSERSWILD = 0x5455;
+ record_tdep->ioctl_TIOCGLCKTRMIOS = 0x5456;
+ record_tdep->ioctl_TIOCSLCKTRMIOS = 0x5457;
+ record_tdep->ioctl_TIOCSERGSTRUCT = 0x5458;
+ record_tdep->ioctl_TIOCSERGETLSR = 0x5459;
+ record_tdep->ioctl_TIOCSERGETMULTI = 0x545a;
+ record_tdep->ioctl_TIOCSERSETMULTI = 0x545b;
+ record_tdep->ioctl_TIOCMIWAIT = 0x545c;
+ record_tdep->ioctl_TIOCGICOUNT = 0x545d;
+ record_tdep->ioctl_FIOQSIZE = 0x545e;
+}
+
+/* Initialize OSABI common for GNU/Linux on 31- and 64-bit systems. */
-static int
-s390_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
-{
- return ((isdigit (*s) && s[1] == '(' && s[2] == '%') /* Displacement
- or indirection. */
- || *s == '%' /* Register access. */
- || isdigit (*s)); /* Literal number. */
-}
-
-/* Set up gdbarch struct. */
-
-static struct gdbarch *
-s390_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+static void
+s390_linux_init_abi_any (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- const struct target_desc *tdesc = info.target_desc;
- struct tdesc_arch_data *tdesc_data = NULL;
- struct gdbarch *gdbarch;
- struct gdbarch_tdep *tdep;
- int tdep_abi;
- int have_upper = 0;
- int have_linux_v1 = 0;
- int have_linux_v2 = 0;
- int have_tdb = 0;
- int first_pseudo_reg, last_pseudo_reg;
- static const char *const stap_register_prefixes[] = { "%", NULL };
- static const char *const stap_register_indirection_prefixes[] = { "(",
- NULL };
- static const char *const stap_register_indirection_suffixes[] = { ")",
- NULL };
-
- /* Default ABI and register size. */
- switch (info.bfd_arch_info->mach)
- {
- case bfd_mach_s390_31:
- tdep_abi = ABI_LINUX_S390;
- break;
-
- case bfd_mach_s390_64:
- tdep_abi = ABI_LINUX_ZSERIES;
- break;
-
- default:
- return NULL;
- }
-
- /* Use default target description if none provided by the target. */
- if (!tdesc_has_registers (tdesc))
- {
- if (tdep_abi == ABI_LINUX_S390)
- tdesc = tdesc_s390_linux32;
- else
- tdesc = tdesc_s390x_linux64;
- }
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- /* Check any target description for validity. */
- if (tdesc_has_registers (tdesc))
- {
- static const char *const gprs[] = {
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
- "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
- };
- static const char *const fprs[] = {
- "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
- "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15"
- };
- static const char *const acrs[] = {
- "acr0", "acr1", "acr2", "acr3", "acr4", "acr5", "acr6", "acr7",
- "acr8", "acr9", "acr10", "acr11", "acr12", "acr13", "acr14", "acr15"
- };
- static const char *const gprs_lower[] = {
- "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l",
- "r8l", "r9l", "r10l", "r11l", "r12l", "r13l", "r14l", "r15l"
- };
- static const char *const gprs_upper[] = {
- "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
- "r8h", "r9h", "r10h", "r11h", "r12h", "r13h", "r14h", "r15h"
- };
- static const char *const tdb_regs[] = {
- "tdb0", "tac", "tct", "atia",
- "tr0", "tr1", "tr2", "tr3", "tr4", "tr5", "tr6", "tr7",
- "tr8", "tr9", "tr10", "tr11", "tr12", "tr13", "tr14", "tr15"
- };
- const struct tdesc_feature *feature;
- int i, valid_p = 1;
-
- feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.core");
- if (feature == NULL)
- return NULL;
-
- tdesc_data = tdesc_data_alloc ();
-
- valid_p &= tdesc_numbered_register (feature, tdesc_data,
- S390_PSWM_REGNUM, "pswm");
- valid_p &= tdesc_numbered_register (feature, tdesc_data,
- S390_PSWA_REGNUM, "pswa");
-
- if (tdesc_unnumbered_register (feature, "r0"))
- {
- for (i = 0; i < 16; i++)
- valid_p &= tdesc_numbered_register (feature, tdesc_data,
- S390_R0_REGNUM + i, gprs[i]);
- }
- else
- {
- have_upper = 1;
-
- for (i = 0; i < 16; i++)
- valid_p &= tdesc_numbered_register (feature, tdesc_data,
- S390_R0_REGNUM + i,
- gprs_lower[i]);
- for (i = 0; i < 16; i++)
- valid_p &= tdesc_numbered_register (feature, tdesc_data,
- S390_R0_UPPER_REGNUM + i,
- gprs_upper[i]);
- }
-
- feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.fpr");
- if (feature == NULL)
- {
- tdesc_data_cleanup (tdesc_data);
- return NULL;
- }
-
- valid_p &= tdesc_numbered_register (feature, tdesc_data,
- S390_FPC_REGNUM, "fpc");
- for (i = 0; i < 16; i++)
- valid_p &= tdesc_numbered_register (feature, tdesc_data,
- S390_F0_REGNUM + i, fprs[i]);
-
- feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.acr");
- if (feature == NULL)
- {
- tdesc_data_cleanup (tdesc_data);
- return NULL;
- }
-
- for (i = 0; i < 16; i++)
- valid_p &= tdesc_numbered_register (feature, tdesc_data,
- S390_A0_REGNUM + i, acrs[i]);
-
- /* Optional GNU/Linux-specific "registers". */
- feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.linux");
- if (feature)
- {
- tdesc_numbered_register (feature, tdesc_data,
- S390_ORIG_R2_REGNUM, "orig_r2");
-
- if (tdesc_numbered_register (feature, tdesc_data,
- S390_LAST_BREAK_REGNUM, "last_break"))
- have_linux_v1 = 1;
-
- if (tdesc_numbered_register (feature, tdesc_data,
- S390_SYSTEM_CALL_REGNUM, "system_call"))
- have_linux_v2 = 1;
-
- if (have_linux_v2 > have_linux_v1)
- valid_p = 0;
- }
-
- /* Transaction diagnostic block. */
- feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.tdb");
- if (feature)
- {
- for (i = 0; i < ARRAY_SIZE (tdb_regs); i++)
- valid_p &= tdesc_numbered_register (feature, tdesc_data,
- S390_TDB_DWORD0_REGNUM + i,
- tdb_regs[i]);
- have_tdb = 1;
- }
-
- if (!valid_p)
- {
- tdesc_data_cleanup (tdesc_data);
- return NULL;
- }
- }
+ tdep->s390_syscall_record = s390_linux_syscall_record;
- /* Find a candidate among extant architectures. */
- for (arches = gdbarch_list_lookup_by_info (arches, &info);
- arches != NULL;
- arches = gdbarch_list_lookup_by_info (arches->next, &info))
- {
- tdep = gdbarch_tdep (arches->gdbarch);
- if (!tdep)
- continue;
- if (tdep->abi != tdep_abi)
- continue;
- if ((tdep->gpr_full_regnum != -1) != have_upper)
- continue;
- if (tdesc_data != NULL)
- tdesc_data_cleanup (tdesc_data);
- return arches->gdbarch;
- }
+ linux_init_abi (info, gdbarch);
- /* Otherwise create a new gdbarch for the specified machine type. */
- tdep = XCNEW (struct gdbarch_tdep);
- tdep->abi = tdep_abi;
- tdep->have_linux_v1 = have_linux_v1;
- tdep->have_linux_v2 = have_linux_v2;
- tdep->have_tdb = have_tdb;
- gdbarch = gdbarch_alloc (&info, tdep);
-
- set_gdbarch_believe_pcc_promotion (gdbarch, 0);
- set_gdbarch_char_signed (gdbarch, 0);
-
- /* S/390 GNU/Linux uses either 64-bit or 128-bit long doubles.
- We can safely let them default to 128-bit, since the debug info
- will give the size of type actually used in each case. */
- set_gdbarch_long_double_bit (gdbarch, 128);
- set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
-
- /* Amount PC must be decremented by after a breakpoint. This is
- often the number of bytes returned by gdbarch_breakpoint_from_pc but not
- always. */
- set_gdbarch_decr_pc_after_break (gdbarch, 2);
- /* Stack grows downward. */
- set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- set_gdbarch_breakpoint_from_pc (gdbarch, s390_breakpoint_from_pc);
- set_gdbarch_skip_prologue (gdbarch, s390_skip_prologue);
- set_gdbarch_in_function_epilogue_p (gdbarch, s390_in_function_epilogue_p);
-
- set_gdbarch_num_regs (gdbarch, S390_NUM_REGS);
- set_gdbarch_sp_regnum (gdbarch, S390_SP_REGNUM);
- set_gdbarch_fp0_regnum (gdbarch, S390_F0_REGNUM);
- set_gdbarch_stab_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum);
- set_gdbarch_dwarf2_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum);
- set_gdbarch_value_from_register (gdbarch, s390_value_from_register);
- set_gdbarch_regset_from_core_section (gdbarch,
- s390_regset_from_core_section);
+ /* Register handling. */
set_gdbarch_core_read_description (gdbarch, s390_core_read_description);
set_gdbarch_iterate_over_regset_sections (gdbarch,
s390_iterate_over_regset_sections);
- set_gdbarch_cannot_store_register (gdbarch, s390_cannot_store_register);
set_gdbarch_write_pc (gdbarch, s390_write_pc);
- set_gdbarch_pseudo_register_read (gdbarch, s390_pseudo_register_read);
- set_gdbarch_pseudo_register_write (gdbarch, s390_pseudo_register_write);
- set_tdesc_pseudo_register_name (gdbarch, s390_pseudo_register_name);
- set_tdesc_pseudo_register_type (gdbarch, s390_pseudo_register_type);
- set_tdesc_pseudo_register_reggroup_p (gdbarch,
- s390_pseudo_register_reggroup_p);
- tdesc_use_registers (gdbarch, tdesc, tdesc_data);
-
- /* Assign pseudo register numbers. */
- first_pseudo_reg = gdbarch_num_regs (gdbarch);
- last_pseudo_reg = first_pseudo_reg;
- tdep->gpr_full_regnum = -1;
- if (have_upper)
- {
- tdep->gpr_full_regnum = last_pseudo_reg;
- last_pseudo_reg += 16;
- }
- tdep->pc_regnum = last_pseudo_reg++;
- tdep->cc_regnum = last_pseudo_reg++;
- set_gdbarch_pc_regnum (gdbarch, tdep->pc_regnum);
- set_gdbarch_num_pseudo_regs (gdbarch, last_pseudo_reg - first_pseudo_reg);
-
- /* Inferior function calls. */
- set_gdbarch_push_dummy_call (gdbarch, s390_push_dummy_call);
- set_gdbarch_dummy_id (gdbarch, s390_dummy_id);
- set_gdbarch_frame_align (gdbarch, s390_frame_align);
- set_gdbarch_return_value (gdbarch, s390_return_value);
+ set_gdbarch_cannot_store_register (gdbarch, s390_cannot_store_register);
/* Syscall handling. */
set_gdbarch_get_syscall_number (gdbarch, s390_linux_get_syscall_number);
/* Frame handling. */
- dwarf2_frame_set_init_reg (gdbarch, s390_dwarf2_frame_init_reg);
- dwarf2_frame_set_adjust_regnum (gdbarch, s390_adjust_frame_regnum);
- dwarf2_append_unwinders (gdbarch);
- frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
- frame_unwind_append_unwinder (gdbarch, &s390_stub_frame_unwind);
frame_unwind_append_unwinder (gdbarch, &s390_sigtramp_frame_unwind);
- frame_unwind_append_unwinder (gdbarch, &s390_frame_unwind);
- frame_base_set_default (gdbarch, &s390_frame_base);
- set_gdbarch_unwind_pc (gdbarch, s390_unwind_pc);
- set_gdbarch_unwind_sp (gdbarch, s390_unwind_sp);
-
- /* Displaced stepping. */
- set_gdbarch_displaced_step_copy_insn (gdbarch,
- simple_displaced_step_copy_insn);
- set_gdbarch_displaced_step_fixup (gdbarch, s390_displaced_step_fixup);
- set_gdbarch_displaced_step_free_closure (gdbarch,
- simple_displaced_step_free_closure);
- set_gdbarch_displaced_step_location (gdbarch,
- displaced_step_at_entry_point);
- set_gdbarch_max_insn_length (gdbarch, S390_MAX_INSTR_SIZE);
-
- /* Note that GNU/Linux is the only OS supported on this
- platform. */
- linux_init_abi (info, gdbarch);
-
- switch (tdep->abi)
- {
- case ABI_LINUX_S390:
- tdep->gregset = &s390_gregset;
- tdep->sizeof_gregset = s390_sizeof_gregset;
- tdep->fpregset = &s390_fpregset;
- tdep->sizeof_fpregset = s390_sizeof_fpregset;
-
- set_gdbarch_addr_bits_remove (gdbarch, s390_addr_bits_remove);
- set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
-
- set_xml_syscall_file_name (XML_SYSCALL_FILENAME_S390);
- break;
-
- case ABI_LINUX_ZSERIES:
- tdep->gregset = &s390_gregset;
- tdep->sizeof_gregset = s390x_sizeof_gregset;
- tdep->fpregset = &s390_fpregset;
- tdep->sizeof_fpregset = s390_sizeof_fpregset;
-
- set_gdbarch_long_bit (gdbarch, 64);
- set_gdbarch_long_long_bit (gdbarch, 64);
- set_gdbarch_ptr_bit (gdbarch, 64);
- set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_lp64_fetch_link_map_offsets);
- set_gdbarch_address_class_type_flags (gdbarch,
- s390_address_class_type_flags);
- set_gdbarch_address_class_type_flags_to_name (gdbarch,
- s390_address_class_type_flags_to_name);
- set_gdbarch_address_class_name_to_type_flags (gdbarch,
- s390_address_class_name_to_type_flags);
- set_xml_syscall_file_name (XML_SYSCALL_FILENAME_S390);
- break;
- }
-
- set_gdbarch_print_insn (gdbarch, print_insn_s390);
-
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
- set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
+ /* Support reverse debugging. */
+ set_gdbarch_process_record_signal (gdbarch, s390_linux_record_signal);
+ s390_init_linux_record_tdep (&s390_linux_record_tdep, ABI_LINUX_S390);
+ s390_init_linux_record_tdep (&s390x_linux_record_tdep, ABI_LINUX_ZSERIES);
+}
+
+/* Initialize OSABI for GNU/Linux on 31-bit systems. */
+
+static void
+s390_linux_init_abi_31 (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ tdep->abi = ABI_LINUX_S390;
- /* SystemTap functions. */
- 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_is_single_operand (gdbarch, s390_stap_is_single_operand);
+ s390_linux_init_abi_any (info, gdbarch);
- return gdbarch;
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ svr4_ilp32_fetch_link_map_offsets);
+ set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_S390);
}
+/* Initialize OSABI for GNU/Linux on 64-bit systems. */
+
+static void
+s390_linux_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ tdep->abi = ABI_LINUX_ZSERIES;
-extern initialize_file_ftype _initialize_s390_tdep; /* -Wmissing-prototypes */
+ s390_linux_init_abi_any (info, gdbarch);
+
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ svr4_lp64_fetch_link_map_offsets);
+ set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_S390X);
+}
+void _initialize_s390_linux_tdep ();
void
-_initialize_s390_tdep (void)
+_initialize_s390_linux_tdep ()
{
- /* Hook us into the gdbarch mechanism. */
- register_gdbarch_init (bfd_arch_s390, s390_gdbarch_init);
+ /* Hook us into the OSABI mechanism. */
+ gdbarch_register_osabi (bfd_arch_s390, bfd_mach_s390_31, GDB_OSABI_LINUX,
+ s390_linux_init_abi_31);
+ gdbarch_register_osabi (bfd_arch_s390, bfd_mach_s390_64, GDB_OSABI_LINUX,
+ s390_linux_init_abi_64);
/* Initialize the GNU/Linux target descriptions. */
- initialize_tdesc_s390_linux32 ();
initialize_tdesc_s390_linux32v1 ();
initialize_tdesc_s390_linux32v2 ();
initialize_tdesc_s390_linux64 ();
initialize_tdesc_s390_linux64v1 ();
initialize_tdesc_s390_linux64v2 ();
initialize_tdesc_s390_te_linux64 ();
- initialize_tdesc_s390x_linux64 ();
+ initialize_tdesc_s390_vx_linux64 ();
+ initialize_tdesc_s390_tevx_linux64 ();
+ initialize_tdesc_s390_gs_linux64 ();
initialize_tdesc_s390x_linux64v1 ();
initialize_tdesc_s390x_linux64v2 ();
initialize_tdesc_s390x_te_linux64 ();
+ initialize_tdesc_s390x_vx_linux64 ();
+ initialize_tdesc_s390x_tevx_linux64 ();
+ initialize_tdesc_s390x_gs_linux64 ();
}
projects / deliverable / binutils-gdb.git / blobdiff