/* Target-dependent code for GDB, the GNU debugger.
- Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
for IBM Deutschland Entwicklung GmbH, IBM Corporation.
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
-#define S390_TDEP /* for special macros in tm-s390.h */
-#include <defs.h>
+#include "defs.h"
#include "arch-utils.h"
#include "frame.h"
#include "inferior.h"
#include "target.h"
#include "gdbcore.h"
#include "gdbcmd.h"
-#include "symfile.h"
#include "objfiles.h"
#include "tm.h"
#include "../bfd/bfd.h"
#include "floatformat.h"
#include "regcache.h"
+#include "reggroups.h"
+#include "regset.h"
#include "value.h"
#include "gdb_assert.h"
#include "dis-asm.h"
+#include "s390-tdep.h"
-/* Number of bytes of storage in the actual machine representation
- for register N. */
-static int
-s390_register_raw_size (int reg_nr)
+/* The tdep structure. */
+
+struct gdbarch_tdep
{
- if (S390_FP0_REGNUM <= reg_nr
- && reg_nr < S390_FP0_REGNUM + S390_NUM_FPRS)
- return S390_FPR_SIZE;
- else
- return 4;
+ /* ABI version. */
+ enum { ABI_LINUX_S390, ABI_LINUX_ZSERIES } abi;
+
+ /* Core file register sets. */
+ const struct regset *gregset;
+ int sizeof_gregset;
+
+ const struct regset *fpregset;
+ int sizeof_fpregset;
+};
+
+
+/* Register information. */
+
+struct s390_register_info
+{
+ char *name;
+ struct type **type;
+};
+
+static struct s390_register_info s390_register_info[S390_NUM_TOTAL_REGS] =
+{
+ /* Program Status Word. */
+ { "pswm", &builtin_type_long },
+ { "pswa", &builtin_type_long },
+
+ /* General Purpose Registers. */
+ { "r0", &builtin_type_long },
+ { "r1", &builtin_type_long },
+ { "r2", &builtin_type_long },
+ { "r3", &builtin_type_long },
+ { "r4", &builtin_type_long },
+ { "r5", &builtin_type_long },
+ { "r6", &builtin_type_long },
+ { "r7", &builtin_type_long },
+ { "r8", &builtin_type_long },
+ { "r9", &builtin_type_long },
+ { "r10", &builtin_type_long },
+ { "r11", &builtin_type_long },
+ { "r12", &builtin_type_long },
+ { "r13", &builtin_type_long },
+ { "r14", &builtin_type_long },
+ { "r15", &builtin_type_long },
+
+ /* Access Registers. */
+ { "acr0", &builtin_type_int },
+ { "acr1", &builtin_type_int },
+ { "acr2", &builtin_type_int },
+ { "acr3", &builtin_type_int },
+ { "acr4", &builtin_type_int },
+ { "acr5", &builtin_type_int },
+ { "acr6", &builtin_type_int },
+ { "acr7", &builtin_type_int },
+ { "acr8", &builtin_type_int },
+ { "acr9", &builtin_type_int },
+ { "acr10", &builtin_type_int },
+ { "acr11", &builtin_type_int },
+ { "acr12", &builtin_type_int },
+ { "acr13", &builtin_type_int },
+ { "acr14", &builtin_type_int },
+ { "acr15", &builtin_type_int },
+
+ /* Floating Point Control Word. */
+ { "fpc", &builtin_type_int },
+
+ /* Floating Point Registers. */
+ { "f0", &builtin_type_double },
+ { "f1", &builtin_type_double },
+ { "f2", &builtin_type_double },
+ { "f3", &builtin_type_double },
+ { "f4", &builtin_type_double },
+ { "f5", &builtin_type_double },
+ { "f6", &builtin_type_double },
+ { "f7", &builtin_type_double },
+ { "f8", &builtin_type_double },
+ { "f9", &builtin_type_double },
+ { "f10", &builtin_type_double },
+ { "f11", &builtin_type_double },
+ { "f12", &builtin_type_double },
+ { "f13", &builtin_type_double },
+ { "f14", &builtin_type_double },
+ { "f15", &builtin_type_double },
+
+ /* Pseudo registers. */
+ { "pc", &builtin_type_void_func_ptr },
+ { "cc", &builtin_type_int },
+};
+
+/* Return the name of register REGNUM. */
+static const char *
+s390_register_name (int regnum)
+{
+ gdb_assert (regnum >= 0 && regnum < S390_NUM_TOTAL_REGS);
+ return s390_register_info[regnum].name;
+}
+
+/* Return the GDB type object for the "standard" data type of data in
+ register REGNUM. */
+static struct type *
+s390_register_type (struct gdbarch *gdbarch, int regnum)
+{
+ gdb_assert (regnum >= 0 && regnum < S390_NUM_TOTAL_REGS);
+ return *s390_register_info[regnum].type;
}
+/* DWARF Register Mapping. */
+
+static int 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
+};
+
+/* Convert DWARF register number REG to the appropriate register
+ number used by GDB. */
static int
-s390x_register_raw_size (int reg_nr)
+s390_dwarf_reg_to_regnum (int reg)
+{
+ int regnum = -1;
+
+ if (reg >= 0 || reg < ARRAY_SIZE (s390_dwarf_regmap))
+ regnum = s390_dwarf_regmap[reg];
+
+ if (regnum == -1)
+ warning ("Unmapped DWARF Register #%d encountered\n", reg);
+
+ return regnum;
+}
+
+/* Pseudo registers - PC and condition code. */
+
+static void
+s390_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, void *buf)
{
- return (reg_nr == S390_FPC_REGNUM)
- || (reg_nr >= S390_FIRST_ACR && reg_nr <= S390_LAST_ACR) ? 4 : 8;
+ ULONGEST val;
+
+ switch (regnum)
+ {
+ case S390_PC_REGNUM:
+ regcache_raw_read_unsigned (regcache, S390_PSWA_REGNUM, &val);
+ store_unsigned_integer (buf, 4, val & 0x7fffffff);
+ break;
+
+ case S390_CC_REGNUM:
+ regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &val);
+ store_unsigned_integer (buf, 4, (val >> 12) & 3);
+ break;
+
+ default:
+ internal_error (__FILE__, __LINE__, "invalid regnum");
+ }
+}
+
+static void
+s390_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, const void *buf)
+{
+ ULONGEST val, psw;
+
+ switch (regnum)
+ {
+ case S390_PC_REGNUM:
+ val = extract_unsigned_integer (buf, 4);
+ regcache_raw_read_unsigned (regcache, S390_PSWA_REGNUM, &psw);
+ psw = (psw & 0x80000000) | (val & 0x7fffffff);
+ regcache_raw_write_unsigned (regcache, S390_PSWA_REGNUM, psw);
+ break;
+
+ case S390_CC_REGNUM:
+ val = extract_unsigned_integer (buf, 4);
+ regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &psw);
+ psw = (psw & ~((ULONGEST)3 << 12)) | ((val & 3) << 12);
+ regcache_raw_write_unsigned (regcache, S390_PSWM_REGNUM, psw);
+ break;
+
+ default:
+ internal_error (__FILE__, __LINE__, "invalid regnum");
+ }
+}
+
+static void
+s390x_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, void *buf)
+{
+ ULONGEST val;
+
+ switch (regnum)
+ {
+ case S390_PC_REGNUM:
+ regcache_raw_read (regcache, S390_PSWA_REGNUM, buf);
+ break;
+
+ case S390_CC_REGNUM:
+ regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &val);
+ store_unsigned_integer (buf, 4, (val >> 44) & 3);
+ break;
+
+ default:
+ internal_error (__FILE__, __LINE__, "invalid regnum");
+ }
+}
+
+static void
+s390x_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, const void *buf)
+{
+ ULONGEST val, psw;
+
+ switch (regnum)
+ {
+ case S390_PC_REGNUM:
+ regcache_raw_write (regcache, S390_PSWA_REGNUM, buf);
+ break;
+
+ case S390_CC_REGNUM:
+ val = extract_unsigned_integer (buf, 4);
+ regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &psw);
+ psw = (psw & ~((ULONGEST)3 << 44)) | ((val & 3) << 44);
+ regcache_raw_write_unsigned (regcache, S390_PSWM_REGNUM, psw);
+ break;
+
+ default:
+ 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 int
-s390_cannot_fetch_register (int regno)
+s390_convert_register_p (int regno, struct type *type)
+{
+ return (regno >= S390_F0_REGNUM && regno <= S390_F15_REGNUM)
+ && TYPE_LENGTH (type) < 8;
+}
+
+static void
+s390_register_to_value (struct frame_info *frame, int regnum,
+ struct type *valtype, void *out)
+{
+ char in[8];
+ int len = TYPE_LENGTH (valtype);
+ gdb_assert (len < 8);
+
+ get_frame_register (frame, regnum, in);
+ memcpy (out, in, len);
+}
+
+static void
+s390_value_to_register (struct frame_info *frame, int regnum,
+ struct type *valtype, const void *in)
{
- return (regno >= S390_FIRST_CR && regno < (S390_FIRST_CR + 9)) ||
- (regno >= (S390_FIRST_CR + 12) && regno <= S390_LAST_CR);
+ char out[8];
+ int len = TYPE_LENGTH (valtype);
+ gdb_assert (len < 8);
+
+ memset (out, 0, 8);
+ memcpy (out, in, len);
+ put_frame_register (frame, regnum, out);
}
+/* Register groups. */
+
static int
-s390_register_byte (int reg_nr)
-{
- if (reg_nr <= S390_GP_LAST_REGNUM)
- return reg_nr * S390_GPR_SIZE;
- if (reg_nr <= S390_LAST_ACR)
- return S390_ACR0_OFFSET + (((reg_nr) - S390_FIRST_ACR) * S390_ACR_SIZE);
- if (reg_nr <= S390_LAST_CR)
- return S390_CR0_OFFSET + (((reg_nr) - S390_FIRST_CR) * S390_CR_SIZE);
- if (reg_nr == S390_FPC_REGNUM)
- return S390_FPC_OFFSET;
- else
- return S390_FP0_OFFSET + (((reg_nr) - S390_FP0_REGNUM) * S390_FPR_SIZE);
+s390_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
+ struct reggroup *group)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Registers displayed via 'info regs'. */
+ if (group == general_reggroup)
+ return (regnum >= S390_R0_REGNUM && regnum <= S390_R15_REGNUM)
+ || regnum == S390_PC_REGNUM
+ || regnum == S390_CC_REGNUM;
+
+ /* Registers displayed via 'info float'. */
+ if (group == float_reggroup)
+ return (regnum >= S390_F0_REGNUM && regnum <= S390_F15_REGNUM)
+ || regnum == S390_FPC_REGNUM;
+
+ /* Registers that need to be saved/restored in order to
+ push or pop frames. */
+ if (group == save_reggroup || group == restore_reggroup)
+ return regnum != S390_PSWM_REGNUM && regnum != S390_PSWA_REGNUM;
+
+ return default_register_reggroup_p (gdbarch, regnum, group);
+}
+
+
+/* Core file register sets. */
+
+int s390_regmap_gregset[S390_NUM_REGS] =
+{
+ /* Program Status Word. */
+ 0x00, 0x04,
+ /* General Purpose Registers. */
+ 0x08, 0x0c, 0x10, 0x14,
+ 0x18, 0x1c, 0x20, 0x24,
+ 0x28, 0x2c, 0x30, 0x34,
+ 0x38, 0x3c, 0x40, 0x44,
+ /* Access Registers. */
+ 0x48, 0x4c, 0x50, 0x54,
+ 0x58, 0x5c, 0x60, 0x64,
+ 0x68, 0x6c, 0x70, 0x74,
+ 0x78, 0x7c, 0x80, 0x84,
+ /* Floating Point Control Word. */
+ -1,
+ /* Floating Point Registers. */
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+};
+
+int s390x_regmap_gregset[S390_NUM_REGS] =
+{
+ 0x00, 0x08,
+ /* General Purpose Registers. */
+ 0x10, 0x18, 0x20, 0x28,
+ 0x30, 0x38, 0x40, 0x48,
+ 0x50, 0x58, 0x60, 0x68,
+ 0x70, 0x78, 0x80, 0x88,
+ /* Access Registers. */
+ 0x90, 0x94, 0x98, 0x9c,
+ 0xa0, 0xa4, 0xa8, 0xac,
+ 0xb0, 0xb4, 0xb8, 0xbc,
+ 0xc0, 0xc4, 0xc8, 0xcc,
+ /* Floating Point Control Word. */
+ -1,
+ /* Floating Point Registers. */
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+};
+
+int s390_regmap_fpregset[S390_NUM_REGS] =
+{
+ /* Program Status Word. */
+ -1, -1,
+ /* General Purpose Registers. */
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ /* Access Registers. */
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ /* Floating Point Control Word. */
+ 0x00,
+ /* Floating Point Registers. */
+ 0x08, 0x10, 0x18, 0x20,
+ 0x28, 0x30, 0x38, 0x40,
+ 0x48, 0x50, 0x58, 0x60,
+ 0x68, 0x70, 0x78, 0x80,
+};
+
+/* Supply register REGNUM from the register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+static void
+s390_supply_regset (const struct regset *regset, struct regcache *regcache,
+ int regnum, const void *regs, size_t len)
+{
+ const int *offset = regset->descr;
+ int i;
+
+ for (i = 0; i < S390_NUM_REGS; i++)
+ {
+ if ((regnum == i || regnum == -1) && offset[i] != -1)
+ regcache_raw_supply (regcache, i, (const char *)regs + offset[i]);
+ }
+}
+
+static const struct regset s390_gregset = {
+ s390_regmap_gregset,
+ s390_supply_regset
+};
+
+static const struct regset s390x_gregset = {
+ s390x_regmap_gregset,
+ s390_supply_regset
+};
+
+static const struct regset s390_fpregset = {
+ s390_regmap_fpregset,
+ s390_supply_regset
+};
+
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+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;
+
+ return NULL;
}
+
+#define GDB_TARGET_IS_ESAME (TARGET_ARCHITECTURE->mach == bfd_mach_s390_64)
+#define S390_GPR_SIZE (GDB_TARGET_IS_ESAME ? 8 : 4)
+#define S390_FPR_SIZE (8)
#define S390_MAX_INSTR_SIZE (6)
#define S390_SYSCALL_OPCODE (0x0a)
#define S390_SYSCALL_SIZE (2)
#define S390X_SIGREGS_FP0_OFFSET (216)
#define S390_UC_MCONTEXT_OFFSET (256)
#define S390X_UC_MCONTEXT_OFFSET (344)
-#define S390_STACK_FRAME_OVERHEAD 16*DEPRECATED_REGISTER_SIZE+32
-#define S390_STACK_PARAMETER_ALIGNMENT DEPRECATED_REGISTER_SIZE
-#define S390_NUM_FP_PARAMETER_REGISTERS (GDB_TARGET_IS_ESAME ? 4:2)
#define S390_SIGNAL_FRAMESIZE (GDB_TARGET_IS_ESAME ? 160:96)
#define s390_NR_sigreturn 119
#define s390_NR_rt_sigreturn 173
}
-
-static const char *
-s390_register_name (int reg_nr)
-{
- static char *register_names[] = {
- "pswm", "pswa",
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
- "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
- "acr0", "acr1", "acr2", "acr3", "acr4", "acr5", "acr6", "acr7",
- "acr8", "acr9", "acr10", "acr11", "acr12", "acr13", "acr14", "acr15",
- "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7",
- "cr8", "cr9", "cr10", "cr11", "cr12", "cr13", "cr14", "cr15",
- "fpc",
- "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
- "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15"
- };
-
- if (reg_nr <= S390_LAST_REGNUM)
- return register_names[reg_nr];
- else
- return NULL;
-}
-
-
-
-
-static int
-s390_stab_reg_to_regnum (int regno)
-{
- return regno >= 64 ? S390_PSWM_REGNUM - 64 :
- regno >= 48 ? S390_FIRST_ACR - 48 :
- regno >= 32 ? S390_FIRST_CR - 32 :
- regno <= 15 ? (regno + 2) :
- S390_FP0_REGNUM + ((regno - 16) & 8) + (((regno - 16) & 3) << 1) +
- (((regno - 16) & 4) >> 2);
-}
-
-
/* Prologue analysis. */
/* When we analyze a prologue, we're really doing 'abstract
op1_stg = 0xe3, op2_stg = 0x24,
op_stm = 0x90,
op1_stmg = 0xeb, op2_stmg = 0x24,
+ op_lm = 0x98,
+ op1_lmg = 0xeb, op2_lmg = 0x04,
op_svc = 0x0a,
};
track general-purpose registers r2 -- r15, and floating-point
registers f0, f2, f4, and f6. */
#define S390_NUM_SPILL_SLOTS (14 + 4)
+#define S390_NUM_GPRS 16
+#define S390_NUM_FPRS 16
/* If the SIZE bytes at ADDR are a stack slot we're actually tracking,
/* Construct the addresses of the spill arrays and the back chain. */
pv_set_to_register (&gpr_spill_addr, S390_SP_REGNUM, 2 * S390_GPR_SIZE);
pv_set_to_register (&fpr_spill_addr, S390_SP_REGNUM, 16 * S390_GPR_SIZE);
- back_chain_addr = gpr[S390_SP_REGNUM - S390_GP0_REGNUM];
+ back_chain_addr = gpr[S390_SP_REGNUM - S390_R0_REGNUM];
/* We have to check for GPR and FPR references using two separate
calls to pv_is_array_ref, since the GPR and FPR spill slots are
&& get_frame_extra_info (next_frame)->sigcontext)
{
/* We're definitely backtracing from a signal handler. */
- CORE_ADDR *saved_regs = get_frame_saved_regs (fi);
+ CORE_ADDR *saved_regs = deprecated_get_frame_saved_regs (fi);
CORE_ADDR save_reg_addr = (get_frame_extra_info (next_frame)->sigcontext
- + DEPRECATED_REGISTER_BYTE (S390_GP0_REGNUM));
+ + DEPRECATED_REGISTER_BYTE (S390_R0_REGNUM));
int reg;
for (reg = 0; reg < S390_NUM_GPRS; reg++)
{
- saved_regs[S390_GP0_REGNUM + reg] = save_reg_addr;
+ saved_regs[S390_R0_REGNUM + reg] = save_reg_addr;
save_reg_addr += S390_GPR_SIZE;
}
S390_SIGREGS_FP0_OFFSET));
for (reg = 0; reg < S390_NUM_FPRS; reg++)
{
- saved_regs[S390_FP0_REGNUM + reg] = save_reg_addr;
+ saved_regs[S390_F0_REGNUM + reg] = save_reg_addr;
save_reg_addr += S390_FPR_SIZE;
}
}
int i;
for (i = 0; i < S390_NUM_GPRS; i++)
- pv_set_to_register (&gpr[i], S390_GP0_REGNUM + i, 0);
+ pv_set_to_register (&gpr[i], S390_R0_REGNUM + i, 0);
for (i = 0; i < S390_NUM_FPRS; i++)
- pv_set_to_register (&fpr[i], S390_FP0_REGNUM + i, 0);
+ pv_set_to_register (&fpr[i], S390_F0_REGNUM + i, 0);
for (i = 0; i < S390_NUM_SPILL_SLOTS; i++)
pv_set_to_unknown (&spill[i]);
next_pc = pc + insn_len;
- pre_insn_sp = gpr[S390_SP_REGNUM - S390_GP0_REGNUM];
- pre_insn_fp = gpr[S390_FRAME_REGNUM - S390_GP0_REGNUM];
+ pre_insn_sp = gpr[S390_SP_REGNUM - S390_R0_REGNUM];
+ pre_insn_fp = gpr[S390_FRAME_REGNUM - S390_R0_REGNUM];
pre_insn_back_chain = back_chain;
/* A special case, first --- only recognized as the very first
restore instructions. (The back chain is never restored,
just popped.) */
{
- struct prologue_value *sp = &gpr[S390_SP_REGNUM - S390_GP0_REGNUM];
- struct prologue_value *fp = &gpr[S390_FRAME_REGNUM - S390_GP0_REGNUM];
+ struct prologue_value *sp = &gpr[S390_SP_REGNUM - S390_R0_REGNUM];
+ struct prologue_value *fp = &gpr[S390_FRAME_REGNUM - S390_R0_REGNUM];
if ((! pv_is_identical (&pre_insn_sp, sp)
&& ! pv_is_register (sp, S390_SP_REGNUM, 0))
that strongly suggests that we're going to use that as our
frame pointer register, not the SP. */
{
- struct prologue_value *fp = &gpr[S390_FRAME_REGNUM - S390_GP0_REGNUM];
+ struct prologue_value *fp = &gpr[S390_FRAME_REGNUM - S390_R0_REGNUM];
if (fp->kind == pv_register
&& fp->reg == S390_SP_REGNUM)
else
frame_base_regno = S390_SP_REGNUM;
- frame_base = &gpr[frame_base_regno - S390_GP0_REGNUM];
+ frame_base = &gpr[frame_base_regno - S390_R0_REGNUM];
/* We know the frame base address; if the value of whatever
register it came from is a constant offset from the
/* If the analysis said that the current SP value is the original
value less some constant, then that constant is the frame size. */
{
- struct prologue_value *sp = &gpr[S390_SP_REGNUM - S390_GP0_REGNUM];
+ struct prologue_value *sp = &gpr[S390_SP_REGNUM - S390_R0_REGNUM];
if (sp->kind == pv_register
&& sp->reg == S390_SP_REGNUM)
- the analysis gave us enough information to actually figure it
out. */
if (fi
- && get_frame_saved_regs (fi)
+ && deprecated_get_frame_saved_regs (fi)
&& original_sp != -1)
{
int slot_num;
CORE_ADDR slot_addr;
- CORE_ADDR *saved_regs = get_frame_saved_regs (fi);
+ CORE_ADDR *saved_regs = deprecated_get_frame_saved_regs (fi);
/* Scan the spill array; if a spill slot says it holds the
original value of some register, then record that slot's
return result;
}
+/* 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
+ preceeding 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
+ && !read_memory_nobpt (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 == 8
+ && !read_memory_nobpt (pc - 6, insn, 6)
+ && is_rse (insn, op1_lmg, op2_lmg, &r1, &r3, &d2, &b2)
+ && r3 == S390_SP_REGNUM - S390_R0_REGNUM)
+ return 1;
+
+ return 0;
+}
static int
s390_check_function_end (CORE_ADDR pc)
}
-
-static CORE_ADDR
-s390_function_start (struct frame_info *fi)
-{
- CORE_ADDR function_start = 0;
-
- if (get_frame_extra_info (fi) && get_frame_extra_info (fi)->initialised)
- function_start = get_frame_extra_info (fi)->function_start;
- else if (get_frame_pc (fi))
- function_start = get_frame_func (fi);
- return function_start;
-}
-
-
-
-
static int
s390_frameless_function_invocation (struct frame_info *fi)
{
*sigcaller_pc =
ADDR_BITS_REMOVE ((CORE_ADDR)
read_memory_integer (temp_sregs +
- DEPRECATED_REGISTER_BYTE (S390_PC_REGNUM),
- S390_PSW_ADDR_SIZE));
+ DEPRECATED_REGISTER_BYTE (S390_PSWA_REGNUM),
+ S390_GPR_SIZE));
}
}
retval = 1;
int quick;
- if (get_frame_saved_regs (fi) == NULL)
+ if (deprecated_get_frame_saved_regs (fi) == NULL)
{
/* zalloc memsets the saved regs */
frame_saved_regs_zalloc (fi);
{
get_frame_extra_info (fi)->saved_pc_valid = 1;
if (get_frame_extra_info (fi)->good_prologue
- && get_frame_saved_regs (fi)[S390_RETADDR_REGNUM])
+ && deprecated_get_frame_saved_regs (fi)[S390_RETADDR_REGNUM])
get_frame_extra_info (fi)->saved_pc
= ADDR_BITS_REMOVE (read_memory_integer
- (get_frame_saved_regs (fi)[S390_RETADDR_REGNUM],
+ (deprecated_get_frame_saved_regs (fi)[S390_RETADDR_REGNUM],
S390_GPR_SIZE));
else
get_frame_extra_info (fi)->saved_pc
{
/* read sigregs,regs.gprs[11 or 15] */
prev_fp = read_memory_integer (sregs +
- DEPRECATED_REGISTER_BYTE (S390_GP0_REGNUM +
+ DEPRECATED_REGISTER_BYTE (S390_R0_REGNUM +
(prev_fextra_info.
frame_pointer_saved_pc
? 11 : 15)),
}
else
{
- if (get_frame_saved_regs (thisframe))
+ if (deprecated_get_frame_saved_regs (thisframe))
{
int regno;
if (prev_fextra_info.frame_pointer_saved_pc
- && get_frame_saved_regs (thisframe)[S390_FRAME_REGNUM])
+ && deprecated_get_frame_saved_regs (thisframe)[S390_FRAME_REGNUM])
regno = S390_FRAME_REGNUM;
else
regno = S390_SP_REGNUM;
- if (get_frame_saved_regs (thisframe)[regno])
+ if (deprecated_get_frame_saved_regs (thisframe)[regno])
{
/* The SP's entry of `saved_regs' is special. */
if (regno == S390_SP_REGNUM)
- prev_fp = get_frame_saved_regs (thisframe)[regno];
+ prev_fp = deprecated_get_frame_saved_regs (thisframe)[regno];
else
prev_fp =
- read_memory_integer (get_frame_saved_regs (thisframe)[regno],
+ read_memory_integer (deprecated_get_frame_saved_regs (thisframe)[regno],
S390_GPR_SIZE);
}
}
out as our frames are similar to rs6000 there is a possibility
i386 dosen't need it. */
-
-
-/* a given return value in `regbuf' with a type `valtype', extract and copy its
- value into `valbuf' */
-static void
-s390_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
-{
- /* floats and doubles are returned in fpr0. fpr's have a size of 8 bytes.
- We need to truncate the return value into float size (4 byte) if
- necessary. */
- int len = TYPE_LENGTH (valtype);
-
- if (TYPE_CODE (valtype) == TYPE_CODE_FLT)
- memcpy (valbuf, ®buf[DEPRECATED_REGISTER_BYTE (S390_FP0_REGNUM)], len);
- else
- {
- int offset = 0;
- /* return value is copied starting from r2. */
- if (TYPE_LENGTH (valtype) < S390_GPR_SIZE)
- offset = S390_GPR_SIZE - TYPE_LENGTH (valtype);
- memcpy (valbuf,
- regbuf + DEPRECATED_REGISTER_BYTE (S390_GP0_REGNUM + 2) + offset,
- TYPE_LENGTH (valtype));
- }
-}
-
-
-static char *
-s390_promote_integer_argument (struct type *valtype, char *valbuf,
- char *reg_buff, int *arglen)
-{
- char *value = valbuf;
- int len = TYPE_LENGTH (valtype);
-
- if (len < S390_GPR_SIZE)
- {
- /* We need to upgrade this value to a register to pass it correctly */
- int idx, diff = S390_GPR_SIZE - len, negative =
- (!TYPE_UNSIGNED (valtype) && value[0] & 0x80);
- for (idx = 0; idx < S390_GPR_SIZE; idx++)
- {
- reg_buff[idx] = (idx < diff ? (negative ? 0xff : 0x0) :
- value[idx - diff]);
- }
- value = reg_buff;
- *arglen = S390_GPR_SIZE;
- }
- else
- {
- if (len & (S390_GPR_SIZE - 1))
- {
- fprintf_unfiltered (gdb_stderr,
- "s390_promote_integer_argument detected an argument not "
- "a multiple of S390_GPR_SIZE & greater than S390_GPR_SIZE "
- "we might not deal with this correctly.\n");
- }
- *arglen = len;
- }
-
- return (value);
-}
-
-static void
-s390_store_return_value (struct type *valtype, char *valbuf)
-{
- int arglen;
- char *reg_buff = alloca (max (S390_FPR_SIZE, DEPRECATED_REGISTER_SIZE)), *value;
-
- if (TYPE_CODE (valtype) == TYPE_CODE_FLT)
- {
- if (TYPE_LENGTH (valtype) == 4
- || TYPE_LENGTH (valtype) == 8)
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (S390_FP0_REGNUM),
- valbuf, TYPE_LENGTH (valtype));
- else
- error ("GDB is unable to return `long double' values "
- "on this architecture.");
- }
- else
- {
- value =
- s390_promote_integer_argument (valtype, valbuf, reg_buff, &arglen);
- /* Everything else is returned in GPR2 and up. */
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (S390_GP0_REGNUM + 2),
- value, arglen);
- }
-}
-
-
/* Not the most efficent code in the world */
static int
s390_fp_regnum (void)
write_register (S390_PC_REGNUM, DEPRECATED_FRAME_SAVED_PC (frame));
/* Restore any saved registers. */
- if (get_frame_saved_regs (frame))
+ if (deprecated_get_frame_saved_regs (frame))
{
for (regnum = 0; regnum < NUM_REGS; regnum++)
- if (get_frame_saved_regs (frame)[regnum] != 0)
+ if (deprecated_get_frame_saved_regs (frame)[regnum] != 0)
{
ULONGEST value;
- value = read_memory_unsigned_integer (get_frame_saved_regs (frame)[regnum],
- REGISTER_RAW_SIZE (regnum));
+ value = read_memory_unsigned_integer (deprecated_get_frame_saved_regs (frame)[regnum],
+ DEPRECATED_REGISTER_RAW_SIZE (regnum));
write_register (regnum, value);
}
/* Actually cut back the stack. Remember that the SP's element of
saved_regs is the old SP itself, not the address at which it is
saved. */
- write_register (S390_SP_REGNUM, get_frame_saved_regs (frame)[S390_SP_REGNUM]);
+ write_register (S390_SP_REGNUM, deprecated_get_frame_saved_regs (frame)[S390_SP_REGNUM]);
}
/* Throw away any cached frame information. */
}
+/* 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. */
|| 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. */
... and so on.
- WHY THE HECK DO WE CARE ABOUT THIS??? Well, it turns out that GCC
- passes all float singletons and double singletons as if they were
- simply floats or doubles. This is *not* what the ABI says it
- should do. */
+ 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)
{
- return (TYPE_CODE (type) == TYPE_CODE_STRUCT
- && TYPE_NFIELDS (type) == 1
- && (TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_FLT
- || is_float_singleton (TYPE_FIELD_TYPE (type, 0))));
+ if (TYPE_CODE (type) == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1)
+ {
+ struct type *singleton_type = TYPE_FIELD_TYPE (type, 0);
+ CHECK_TYPEDEF (singleton_type);
+
+ return (TYPE_CODE (singleton_type) == TYPE_CODE_FLT
+ || is_float_singleton (singleton_type));
+ }
+
+ return 0;
}
}
-/* Return non-zero if TYPE is considered a `DOUBLE_OR_FLOAT', as
- defined by the parameter passing conventions described in the
- "GNU/Linux for S/390 ELF Application Binary Interface Supplement".
- Otherwise, return zero. */
static int
-is_double_or_float (struct type *type)
+is_power_of_two (unsigned int n)
{
- return (is_float_like (type)
- && (TYPE_LENGTH (type) == 4
- || TYPE_LENGTH (type) == 8));
+ return ((n & (n - 1)) == 0);
}
-
-/* Return non-zero if TYPE is a `DOUBLE_ARG', as defined by the
- parameter passing conventions described in the "GNU/Linux for S/390
- ELF Application Binary Interface Supplement". Return zero
- otherwise. */
+/* Return non-zero if TYPE should be passed as a pointer to a copy,
+ zero otherwise. */
static int
-is_double_arg (struct type *type)
+s390_function_arg_pass_by_reference (struct type *type)
{
unsigned length = TYPE_LENGTH (type);
+ if (length > 8)
+ return 1;
- /* The s390x ABI doesn't handle DOUBLE_ARGS specially. */
- if (GDB_TARGET_IS_ESAME)
- return 0;
-
- return ((is_integer_like (type)
- || is_struct_like (type))
- && length == 8);
+ /* FIXME: All complex and vector types are also returned by reference. */
+ return is_struct_like (type) && !is_power_of_two (length);
}
-
-/* Return non-zero if TYPE is considered a `SIMPLE_ARG', as defined by
- the parameter passing conventions described in the "GNU/Linux for
- S/390 ELF Application Binary Interface Supplement". Return zero
- otherwise. */
+/* Return non-zero if TYPE should be passed in a float register
+ if possible. */
static int
-is_simple_arg (struct type *type)
+s390_function_arg_float (struct type *type)
{
unsigned length = TYPE_LENGTH (type);
+ if (length > 8)
+ return 0;
- /* This is almost a direct translation of the ABI's language, except
- that we have to exclude 8-byte structs; those are DOUBLE_ARGs. */
- return ((is_integer_like (type) && length <= DEPRECATED_REGISTER_SIZE)
- || is_pointer_like (type)
- || (is_struct_like (type) && !is_double_arg (type)));
-}
-
-
-static int
-is_power_of_two (unsigned int n)
-{
- return ((n & (n - 1)) == 0);
+ return is_float_like (type);
}
-/* Return non-zero if TYPE should be passed as a pointer to a copy,
- zero otherwise. TYPE must be a SIMPLE_ARG, as recognized by
- `is_simple_arg'. */
+/* Return non-zero if TYPE should be passed in an integer register
+ (or a pair of integer registers) if possible. */
static int
-pass_by_copy_ref (struct type *type)
+s390_function_arg_integer (struct type *type)
{
unsigned length = TYPE_LENGTH (type);
+ if (length > 8)
+ return 0;
- return (is_struct_like (type)
- && !(is_power_of_two (length) && length <= DEPRECATED_REGISTER_SIZE));
+ return is_integer_like (type)
+ || is_pointer_like (type)
+ || (is_struct_like (type) && is_power_of_two (length));
}
-
/* Return ARG, a `SIMPLE_ARG', sign-extended or zero-extended to a full
word as required for the ABI. */
static LONGEST
}
-/* Round ADDR up to the next N-byte boundary. N must be a power of
- two. */
-static CORE_ADDR
-round_up (CORE_ADDR addr, int n)
-{
- /* Check that N is really a power of two. */
- gdb_assert (n && (n & (n-1)) == 0);
- return ((addr + n - 1) & -n);
-}
-
-
-/* Round ADDR down to the next N-byte boundary. N must be a power of
- two. */
-static CORE_ADDR
-round_down (CORE_ADDR addr, int n)
-{
- /* Check that N is really a power of two. */
- gdb_assert (n && (n & (n-1)) == 0);
- return (addr & -n);
-}
-
-
/* Return the alignment required by TYPE. */
static int
alignment_of (struct type *type)
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_arguments (int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
-{
+s390_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr,
+ struct regcache *regcache, CORE_ADDR bp_addr,
+ int nargs, struct value **args, CORE_ADDR sp,
+ int struct_return, CORE_ADDR struct_addr)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int word_size = gdbarch_ptr_bit (gdbarch) / 8;
+ ULONGEST orig_sp;
int i;
- int pointer_size = (TARGET_PTR_BIT / TARGET_CHAR_BIT);
-
- /* The number of arguments passed by reference-to-copy. */
- int num_copies;
/* 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));
/* Build the reference-to-copy area. */
- num_copies = 0;
for (i = 0; i < nargs; i++)
{
struct value *arg = args[i];
struct type *type = VALUE_TYPE (arg);
unsigned length = TYPE_LENGTH (type);
- if (is_simple_arg (type)
- && pass_by_copy_ref (type))
+ if (s390_function_arg_pass_by_reference (type))
{
sp -= length;
- sp = round_down (sp, alignment_of (type));
+ sp = align_down (sp, alignment_of (type));
write_memory (sp, VALUE_CONTENTS (arg), length);
copy_addr[i] = sp;
- num_copies++;
}
}
/* Reserve space for the parameter area. As a conservative
simplification, we assume that everything will be passed on the
- stack. */
- {
- int i;
-
- for (i = 0; i < nargs; i++)
- {
- struct value *arg = args[i];
- struct type *type = VALUE_TYPE (arg);
- int length = TYPE_LENGTH (type);
-
- sp = round_down (sp, alignment_of (type));
+ stack. Since every argument larger than 8 bytes will be
+ passed by reference, we use this simple upper bound. */
+ sp -= nargs * 8;
- /* SIMPLE_ARG values get extended to DEPRECATED_REGISTER_SIZE bytes.
- Assume every argument is. */
- if (length < DEPRECATED_REGISTER_SIZE) length = DEPRECATED_REGISTER_SIZE;
- sp -= length;
- }
- }
-
- /* Include space for any reference-to-copy pointers. */
- sp = round_down (sp, pointer_size);
- sp -= num_copies * pointer_size;
-
/* After all that, make sure it's still aligned on an eight-byte
boundary. */
- sp = round_down (sp, 8);
+ sp = align_down (sp, 8);
/* Finally, place the actual parameters, working from SP towards
higher addresses. The code above is supposed to reserve enough
int gr = 2;
CORE_ADDR starg = sp;
- /* A struct is returned using general register 2 */
+ /* A struct is returned using general register 2. */
if (struct_return)
- gr++;
+ {
+ 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 = VALUE_TYPE (arg);
-
- if (is_double_or_float (type)
- && fr <= S390_NUM_FP_PARAMETER_REGISTERS * 2 - 2)
- {
- /* When we store a single-precision value in an FP register,
- it occupies the leftmost bits. */
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (S390_FP0_REGNUM + fr),
- VALUE_CONTENTS (arg),
- TYPE_LENGTH (type));
- fr += 2;
- }
- else if (is_simple_arg (type)
- && gr <= 6)
- {
- /* Do we need to pass a pointer to our copy of this
- argument? */
- if (pass_by_copy_ref (type))
- write_register (S390_GP0_REGNUM + gr, copy_addr[i]);
- else
- write_register (S390_GP0_REGNUM + gr, extend_simple_arg (arg));
-
- gr++;
- }
- else if (is_double_arg (type)
- && gr <= 5)
- {
- deprecated_write_register_gen (S390_GP0_REGNUM + gr,
- VALUE_CONTENTS (arg));
- deprecated_write_register_gen (S390_GP0_REGNUM + gr + 1,
- VALUE_CONTENTS (arg) + DEPRECATED_REGISTER_SIZE);
- gr += 2;
- }
- else
- {
- /* The `OTHER' case. */
- enum type_code code = TYPE_CODE (type);
- unsigned length = TYPE_LENGTH (type);
-
- /* If we skipped r6 because we couldn't fit a DOUBLE_ARG
- in it, then don't go back and use it again later. */
- if (is_double_arg (type) && gr == 6)
- gr = 7;
-
- if (is_simple_arg (type))
- {
- /* Simple args are always extended to
- DEPRECATED_REGISTER_SIZE bytes. */
- starg = round_up (starg, DEPRECATED_REGISTER_SIZE);
-
- /* Do we need to pass a pointer to our copy of this
- argument? */
- if (pass_by_copy_ref (type))
- write_memory_signed_integer (starg, pointer_size,
- copy_addr[i]);
- else
- /* Simple args are always extended to
- DEPRECATED_REGISTER_SIZE bytes. */
- write_memory_signed_integer (starg, DEPRECATED_REGISTER_SIZE,
- extend_simple_arg (arg));
- starg += DEPRECATED_REGISTER_SIZE;
- }
- else
- {
- /* You'd think we should say:
- starg = round_up (starg, alignment_of (type));
- Unfortunately, GCC seems to simply align the stack on
- a four/eight-byte boundary, even when passing doubles. */
- starg = round_up (starg, S390_STACK_PARAMETER_ALIGNMENT);
- write_memory (starg, VALUE_CONTENTS (arg), length);
- starg += length;
- }
- }
+ unsigned length = TYPE_LENGTH (type);
+
+ if (s390_function_arg_pass_by_reference (type))
+ {
+ if (gr <= 6)
+ {
+ regcache_cooked_write_unsigned (regcache, S390_R0_REGNUM + gr,
+ copy_addr[i]);
+ gr++;
+ }
+ else
+ {
+ write_memory_unsigned_integer (starg, word_size, 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 (arg));
+ gr++;
+ }
+ else
+ {
+ /* Integer arguments are always extended to word size. */
+ write_memory_signed_integer (starg, word_size,
+ extend_simple_arg (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");
}
}
/* 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 -= S390_STACK_FRAME_OVERHEAD;
+ sp -= 16*word_size + 32;
/* Write the back chain pointer into the first word of the stack
- frame. This will help us get backtraces from within functions
- called from GDB. */
- write_memory_unsigned_integer (sp, (TARGET_PTR_BIT / TARGET_CHAR_BIT),
- deprecated_read_fp ());
+ frame. This is needed to unwind across a dummy frame. */
+ regcache_cooked_read_unsigned (regcache, S390_SP_REGNUM, &orig_sp);
+ write_memory_unsigned_integer (sp, word_size, orig_sp);
+
+ /* Store return address. */
+ regcache_cooked_write_unsigned (regcache, S390_RETADDR_REGNUM, bp_addr);
+
+ /* Store updated stack pointer. */
+ regcache_cooked_write_unsigned (regcache, S390_SP_REGNUM, sp);
+ /* Return stack pointer. */
return sp;
}
+/* Assuming NEXT_FRAME->prev 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_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ ULONGEST sp;
+ frame_unwind_unsigned_register (next_frame, S390_SP_REGNUM, &sp);
+ return frame_id_build (sp, frame_pc_unwind (next_frame));
+}
static CORE_ADDR
s390_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
}
-static int
-s390_use_struct_convention (int gcc_p, struct type *value_type)
-{
- enum type_code code = TYPE_CODE (value_type);
+/* Function return value access. */
- return (code == TYPE_CODE_STRUCT
- || code == TYPE_CODE_UNION);
-}
+static enum return_value_convention
+s390_return_value_convention (struct gdbarch *gdbarch, struct type *type)
+{
+ int length = TYPE_LENGTH (type);
+ if (length > 8)
+ return RETURN_VALUE_STRUCT_CONVENTION;
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ case TYPE_CODE_ARRAY:
+ return RETURN_VALUE_STRUCT_CONVENTION;
-/* Return the GDB type object for the "standard" data type
- of data in register N. */
-static struct type *
-s390_register_virtual_type (int regno)
-{
- if (S390_FP0_REGNUM <= regno && regno < S390_FP0_REGNUM + S390_NUM_FPRS)
- return builtin_type_double;
- else
- return builtin_type_int;
+ default:
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
}
-
-static struct type *
-s390x_register_virtual_type (int regno)
+static enum return_value_convention
+s390_return_value (struct gdbarch *gdbarch, struct type *type,
+ struct regcache *regcache, void *out, const void *in)
{
- return (regno == S390_FPC_REGNUM) ||
- (regno >= S390_FIRST_ACR && regno <= S390_LAST_ACR) ? builtin_type_int :
- (regno >= S390_FP0_REGNUM) ? builtin_type_double : builtin_type_long;
-}
+ int word_size = gdbarch_ptr_bit (gdbarch) / 8;
+ int length = TYPE_LENGTH (type);
+ enum return_value_convention rvc =
+ s390_return_value_convention (gdbarch, type);
+ if (in)
+ {
+ switch (rvc)
+ {
+ case RETURN_VALUE_REGISTER_CONVENTION:
+ if (TYPE_CODE (type) == TYPE_CODE_FLT)
+ {
+ /* 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));
+ else
+ regcache_cooked_write_signed (regcache, S390_R2_REGNUM,
+ extract_signed_integer (in, length));
+ }
+ else if (length == 2*word_size)
+ {
+ regcache_cooked_write (regcache, S390_R2_REGNUM, in);
+ regcache_cooked_write (regcache, S390_R3_REGNUM,
+ (const char *)in + word_size);
+ }
+ else
+ internal_error (__FILE__, __LINE__, "invalid return type");
+ break;
+ case RETURN_VALUE_STRUCT_CONVENTION:
+ error ("Cannot set function return value.");
+ break;
+ }
+ }
+ else if (out)
+ {
+ switch (rvc)
+ {
+ case RETURN_VALUE_REGISTER_CONVENTION:
+ if (TYPE_CODE (type) == TYPE_CODE_FLT)
+ {
+ /* 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,
+ (char *)out + word_size);
+ }
+ else
+ internal_error (__FILE__, __LINE__, "invalid return type");
+ break;
+ case RETURN_VALUE_STRUCT_CONVENTION:
+ error ("Function return value unknown.");
+ break;
+ }
+ }
-static void
-s390_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
-{
- write_register (S390_GP0_REGNUM + 2, addr);
+ return rvc;
}
-
static const unsigned char *
s390_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
{
return (addr) & 0x7fffffff;
}
-
-static CORE_ADDR
-s390_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
-{
- write_register (S390_RETADDR_REGNUM, entry_point_address ());
- return sp;
-}
-
static int
s390_address_class_type_flags (int byte_size, int dwarf2_addr_class)
{
static struct gdbarch *
s390_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
- static LONGEST s390_call_dummy_words[] = { 0 };
struct gdbarch *gdbarch;
struct gdbarch_tdep *tdep;
- int elf_flags;
/* First see if there is already a gdbarch that can satisfy the request. */
arches = gdbarch_list_lookup_by_info (arches, &info);
return NULL; /* No; then it's not for us. */
/* Yes: create a new gdbarch for the specified machine type. */
- gdbarch = gdbarch_alloc (&info, NULL);
+ tdep = XCALLOC (1, struct gdbarch_tdep);
+ gdbarch = gdbarch_alloc (&info, tdep);
/* NOTE: cagney/2002-12-06: This can be deleted when this arch is
ready to unwind the PC first (see frame.c:get_prev_frame()). */
- set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
+ set_gdbarch_deprecated_init_frame_pc (gdbarch, deprecated_init_frame_pc_default);
set_gdbarch_believe_pcc_promotion (gdbarch, 0);
set_gdbarch_char_signed (gdbarch, 0);
- set_gdbarch_frame_args_skip (gdbarch, 0);
set_gdbarch_deprecated_frame_chain (gdbarch, s390_frame_chain);
set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, s390_frame_init_saved_regs);
- set_gdbarch_deprecated_store_struct_return (gdbarch, s390_store_struct_return);
- set_gdbarch_deprecated_extract_return_value (gdbarch, s390_extract_return_value);
- set_gdbarch_deprecated_store_return_value (gdbarch, s390_store_return_value);
/* Amount PC must be decremented by after a breakpoint. This is
often the number of bytes returned by BREAKPOINT_FROM_PC but not
always. */
set_gdbarch_deprecated_pop_frame (gdbarch, s390_pop_frame);
/* Stack grows downward. */
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- /* Offset from address of function to start of its code.
- Zero on most machines. */
- set_gdbarch_function_start_offset (gdbarch, 0);
- set_gdbarch_deprecated_max_register_raw_size (gdbarch, 8);
- set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 8);
set_gdbarch_breakpoint_from_pc (gdbarch, s390_breakpoint_from_pc);
set_gdbarch_skip_prologue (gdbarch, s390_skip_prologue);
set_gdbarch_deprecated_init_extra_frame_info (gdbarch, s390_init_extra_frame_info);
set_gdbarch_deprecated_init_frame_pc_first (gdbarch, s390_init_frame_pc_first);
set_gdbarch_deprecated_target_read_fp (gdbarch, s390_read_fp);
+ set_gdbarch_in_function_epilogue_p (gdbarch, s390_in_function_epilogue_p);
/* This function that tells us whether the function invocation represented
by FI does not have a frame on the stack associated with it. If it
does not, FRAMELESS is set to 1, else 0. */
- set_gdbarch_frameless_function_invocation (gdbarch,
- s390_frameless_function_invocation);
+ set_gdbarch_deprecated_frameless_function_invocation (gdbarch, s390_frameless_function_invocation);
/* Return saved PC from a frame */
set_gdbarch_deprecated_frame_saved_pc (gdbarch, s390_frame_saved_pc);
/* DEPRECATED_FRAME_CHAIN takes a frame's nominal address and
produces the frame's chain-pointer. */
set_gdbarch_deprecated_frame_chain (gdbarch, s390_frame_chain);
set_gdbarch_deprecated_saved_pc_after_call (gdbarch, s390_saved_pc_after_call);
- set_gdbarch_deprecated_register_byte (gdbarch, s390_register_byte);
set_gdbarch_pc_regnum (gdbarch, S390_PC_REGNUM);
set_gdbarch_sp_regnum (gdbarch, S390_SP_REGNUM);
- set_gdbarch_deprecated_fp_regnum (gdbarch, S390_FP_REGNUM);
- set_gdbarch_fp0_regnum (gdbarch, S390_FP0_REGNUM);
+ set_gdbarch_deprecated_fp_regnum (gdbarch, S390_SP_REGNUM);
+ set_gdbarch_fp0_regnum (gdbarch, S390_F0_REGNUM);
set_gdbarch_num_regs (gdbarch, S390_NUM_REGS);
- set_gdbarch_cannot_fetch_register (gdbarch, s390_cannot_fetch_register);
- set_gdbarch_cannot_store_register (gdbarch, s390_cannot_fetch_register);
- set_gdbarch_use_struct_convention (gdbarch, s390_use_struct_convention);
+ set_gdbarch_num_pseudo_regs (gdbarch, S390_NUM_PSEUDO_REGS);
set_gdbarch_register_name (gdbarch, s390_register_name);
- set_gdbarch_stab_reg_to_regnum (gdbarch, s390_stab_reg_to_regnum);
- set_gdbarch_dwarf_reg_to_regnum (gdbarch, s390_stab_reg_to_regnum);
- set_gdbarch_dwarf2_reg_to_regnum (gdbarch, s390_stab_reg_to_regnum);
- set_gdbarch_deprecated_extract_struct_value_address
- (gdbarch, generic_cannot_extract_struct_value_address);
-
- /* Parameters for inferior function calls. */
- set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point);
+ set_gdbarch_register_type (gdbarch, s390_register_type);
+ set_gdbarch_stab_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum);
+ set_gdbarch_dwarf_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum);
+ set_gdbarch_dwarf2_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum);
+ set_gdbarch_convert_register_p (gdbarch, s390_convert_register_p);
+ set_gdbarch_register_to_value (gdbarch, s390_register_to_value);
+ set_gdbarch_value_to_register (gdbarch, s390_value_to_register);
+ set_gdbarch_register_reggroup_p (gdbarch, s390_register_reggroup_p);
+ set_gdbarch_regset_from_core_section (gdbarch,
+ s390_regset_from_core_section);
+
+ /* Inferior function calls. */
+ set_gdbarch_push_dummy_call (gdbarch, s390_push_dummy_call);
+ set_gdbarch_unwind_dummy_id (gdbarch, s390_unwind_dummy_id);
set_gdbarch_frame_align (gdbarch, s390_frame_align);
- set_gdbarch_deprecated_push_arguments (gdbarch, s390_push_arguments);
- set_gdbarch_deprecated_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
- set_gdbarch_deprecated_push_return_address (gdbarch,
- s390_push_return_address);
- set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, sizeof (s390_call_dummy_words));
- set_gdbarch_deprecated_call_dummy_words (gdbarch, s390_call_dummy_words);
+ set_gdbarch_return_value (gdbarch, s390_return_value);
switch (info.bfd_arch_info->mach)
{
case bfd_mach_s390_31:
- set_gdbarch_deprecated_register_size (gdbarch, 4);
- set_gdbarch_deprecated_register_raw_size (gdbarch, s390_register_raw_size);
- set_gdbarch_deprecated_register_virtual_size (gdbarch, s390_register_raw_size);
- set_gdbarch_deprecated_register_virtual_type (gdbarch, s390_register_virtual_type);
+ tdep->abi = 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_gdbarch_deprecated_register_bytes (gdbarch, S390_REGISTER_BYTES);
+ set_gdbarch_pseudo_register_read (gdbarch, s390_pseudo_register_read);
+ set_gdbarch_pseudo_register_write (gdbarch, s390_pseudo_register_write);
break;
case bfd_mach_s390_64:
- set_gdbarch_deprecated_register_size (gdbarch, 8);
- set_gdbarch_deprecated_register_raw_size (gdbarch, s390x_register_raw_size);
- set_gdbarch_deprecated_register_virtual_size (gdbarch, s390x_register_raw_size);
- set_gdbarch_deprecated_register_virtual_type (gdbarch, s390x_register_virtual_type);
+ tdep->abi = ABI_LINUX_ZSERIES;
+
+ tdep->gregset = &s390x_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_gdbarch_deprecated_register_bytes (gdbarch, S390X_REGISTER_BYTES);
+ set_gdbarch_pseudo_register_read (gdbarch, s390x_pseudo_register_read);
+ set_gdbarch_pseudo_register_write (gdbarch, s390x_pseudo_register_write);
set_gdbarch_address_class_type_flags (gdbarch,
s390_address_class_type_flags);
set_gdbarch_address_class_type_flags_to_name (gdbarch,
break;
}
- /* Should be using push_dummy_call. */
- set_gdbarch_deprecated_dummy_write_sp (gdbarch, deprecated_write_sp);
-
set_gdbarch_print_insn (gdbarch, print_insn_s390);
return gdbarch;
projects / deliverable / binutils-gdb.git / blobdiff