/* GNU/Linux S/390 specific low level interface, for the remote server
for GDB.
- Copyright (C) 2001, 2002, 2005, 2006, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 2001-2013 Free Software Foundation, Inc.
This file is part of GDB.
#include "server.h"
#include "linux-low.h"
+#include "elf/common.h"
#include <asm/ptrace.h>
+#include <sys/ptrace.h>
+#include <sys/uio.h>
+#include <elf.h>
-#define s390_num_regs 51
+#ifndef HWCAP_S390_HIGH_GPRS
+#define HWCAP_S390_HIGH_GPRS 512
+#endif
+
+#ifndef PTRACE_GETREGSET
+#define PTRACE_GETREGSET 0x4204
+#endif
+
+#ifndef PTRACE_SETREGSET
+#define PTRACE_SETREGSET 0x4205
+#endif
+
+/* Defined in auto-generated file s390-linux32.c. */
+void init_registers_s390_linux32 (void);
+/* Defined in auto-generated file s390-linux32v1.c. */
+void init_registers_s390_linux32v1 (void);
+/* Defined in auto-generated file s390-linux32v2.c. */
+void init_registers_s390_linux32v2 (void);
+/* Defined in auto-generated file s390-linux64.c. */
+void init_registers_s390_linux64 (void);
+/* Defined in auto-generated file s390-linux64v1.c. */
+void init_registers_s390_linux64v1 (void);
+/* Defined in auto-generated file s390-linux64v2.c. */
+void init_registers_s390_linux64v2 (void);
+/* Defined in auto-generated file s390x-linux64.c. */
+void init_registers_s390x_linux64 (void);
+/* Defined in auto-generated file s390x-linux64v1.c. */
+void init_registers_s390x_linux64v1 (void);
+/* Defined in auto-generated file s390x-linux64v2.c. */
+void init_registers_s390x_linux64v2 (void);
+
+#define s390_num_regs 52
static int s390_regmap[] = {
PT_PSWMASK, PT_PSWADDR,
PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11,
PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15,
#endif
+
+ PT_ORIGGPR2,
};
+#ifdef __s390x__
+#define s390_num_regs_3264 68
+
+static int s390_regmap_3264[] = {
+ PT_PSWMASK, PT_PSWADDR,
+
+ PT_GPR0, PT_GPR0, PT_GPR1, PT_GPR1,
+ PT_GPR2, PT_GPR2, PT_GPR3, PT_GPR3,
+ PT_GPR4, PT_GPR4, PT_GPR5, PT_GPR5,
+ PT_GPR6, PT_GPR6, PT_GPR7, PT_GPR7,
+ PT_GPR8, PT_GPR8, PT_GPR9, PT_GPR9,
+ PT_GPR10, PT_GPR10, PT_GPR11, PT_GPR11,
+ PT_GPR12, PT_GPR12, PT_GPR13, PT_GPR13,
+ PT_GPR14, PT_GPR14, PT_GPR15, PT_GPR15,
+
+ PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3,
+ PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7,
+ PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11,
+ PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15,
+
+ PT_FPC,
+
+ PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3,
+ PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7,
+ PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11,
+ PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15,
+
+ PT_ORIGGPR2,
+};
+#endif
+
+
static int
s390_cannot_fetch_register (int regno)
{
- if (s390_regmap[regno] == -1)
- return 1;
-
return 0;
}
static int
s390_cannot_store_register (int regno)
{
- if (s390_regmap[regno] == -1)
- return 1;
-
return 0;
}
+static void
+s390_collect_ptrace_register (struct regcache *regcache, int regno, char *buf)
+{
+ int size = register_size (regno);
+ if (size < sizeof (long))
+ {
+ int regaddr = the_low_target.regmap[regno];
+
+ memset (buf, 0, sizeof (long));
+
+ if ((regno ^ 1) < the_low_target.num_regs
+ && the_low_target.regmap[regno ^ 1] == regaddr)
+ {
+ collect_register (regcache, regno & ~1, buf);
+ collect_register (regcache, (regno & ~1) + 1,
+ buf + sizeof (long) - size);
+ }
+ else if (regaddr == PT_PSWMASK)
+ {
+ /* Convert 4-byte PSW mask to 8 bytes by clearing bit 12 and copying
+ the basic addressing mode bit from the PSW address. */
+ char *addr = alloca (register_size (regno ^ 1));
+ collect_register (regcache, regno, buf);
+ collect_register (regcache, regno ^ 1, addr);
+ buf[1] &= ~0x8;
+ buf[size] |= (addr[0] & 0x80);
+ }
+ else if (regaddr == PT_PSWADDR)
+ {
+ /* Convert 4-byte PSW address to 8 bytes by clearing the addressing
+ mode bit (which gets copied to the PSW mask instead). */
+ collect_register (regcache, regno, buf + sizeof (long) - size);
+ buf[sizeof (long) - size] &= ~0x80;
+ }
+ else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15)
+ || regaddr == PT_ORIGGPR2)
+ collect_register (regcache, regno, buf + sizeof (long) - size);
+ else
+ collect_register (regcache, regno, buf);
+ }
+ else
+ collect_register (regcache, regno, buf);
+}
+
+static void
+s390_supply_ptrace_register (struct regcache *regcache,
+ int regno, const char *buf)
+{
+ int size = register_size (regno);
+ if (size < sizeof (long))
+ {
+ int regaddr = the_low_target.regmap[regno];
+
+ if ((regno ^ 1) < the_low_target.num_regs
+ && the_low_target.regmap[regno ^ 1] == regaddr)
+ {
+ supply_register (regcache, regno & ~1, buf);
+ supply_register (regcache, (regno & ~1) + 1,
+ buf + sizeof (long) - size);
+ }
+ else if (regaddr == PT_PSWMASK)
+ {
+ /* Convert 8-byte PSW mask to 4 bytes by setting bit 12 and copying
+ the basic addressing mode into the PSW address. */
+ char *mask = alloca (size);
+ char *addr = alloca (register_size (regno ^ 1));
+ memcpy (mask, buf, size);
+ mask[1] |= 0x8;
+ supply_register (regcache, regno, mask);
+
+ collect_register (regcache, regno ^ 1, addr);
+ addr[0] &= ~0x80;
+ addr[0] |= (buf[size] & 0x80);
+ supply_register (regcache, regno ^ 1, addr);
+ }
+ else if (regaddr == PT_PSWADDR)
+ {
+ /* Convert 8-byte PSW address to 4 bytes by truncating, but
+ keeping the addressing mode bit (which was set from the mask). */
+ char *addr = alloca (size);
+ char amode;
+ collect_register (regcache, regno, addr);
+ amode = addr[0] & 0x80;
+ memcpy (addr, buf + sizeof (long) - size, size);
+ addr[0] &= ~0x80;
+ addr[0] |= amode;
+ supply_register (regcache, regno, addr);
+ }
+ else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15)
+ || regaddr == PT_ORIGGPR2)
+ supply_register (regcache, regno, buf + sizeof (long) - size);
+ else
+ supply_register (regcache, regno, buf);
+ }
+ else
+ supply_register (regcache, regno, buf);
+}
+
/* Provide only a fill function for the general register set. ps_lgetregs
will use this for NPTL support. */
-static void s390_fill_gregset (void *buf)
+static void s390_fill_gregset (struct regcache *regcache, void *buf)
{
int i;
- for (i = 0; i < 34; i++)
- collect_register (i, (char *) buf + s390_regmap[i]);
+ for (i = 0; i < the_low_target.num_regs; i++)
+ {
+ if (the_low_target.regmap[i] < PT_PSWMASK
+ || the_low_target.regmap[i] > PT_ACR15)
+ continue;
+
+ s390_collect_ptrace_register (regcache, i, (char *) buf
+ + the_low_target.regmap[i]);
+ }
+}
+
+/* Fill and store functions for extended register sets. */
+
+static void
+s390_fill_last_break (struct regcache *regcache, void *buf)
+{
+ /* Last break address is read-only. */
+}
+
+static void
+s390_store_last_break (struct regcache *regcache, const void *buf)
+{
+ supply_register_by_name (regcache, "last_break",
+ (const char *)buf + 8 - register_size (0));
+}
+
+static void
+s390_fill_system_call (struct regcache *regcache, void *buf)
+{
+ collect_register_by_name (regcache, "system_call", buf);
+}
+
+static void
+s390_store_system_call (struct regcache *regcache, const void *buf)
+{
+ supply_register_by_name (regcache, "system_call", buf);
}
struct regset_info target_regsets[] = {
- { 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL },
- { 0, 0, -1, -1, NULL, NULL }
+ { 0, 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL },
+ /* Last break address is read-only; do not attempt PTRACE_SETREGSET. */
+ { PTRACE_GETREGSET, PTRACE_GETREGSET, NT_S390_LAST_BREAK, 0,
+ EXTENDED_REGS, s390_fill_last_break, s390_store_last_break },
+ { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_SYSTEM_CALL, 0,
+ EXTENDED_REGS, s390_fill_system_call, s390_store_system_call },
+ { 0, 0, 0, -1, -1, NULL, NULL }
};
#define s390_breakpoint_len 2
static CORE_ADDR
-s390_get_pc ()
+s390_get_pc (struct regcache *regcache)
{
- unsigned long pc;
- collect_register_by_name ("pswa", &pc);
-#ifndef __s390x__
- pc &= 0x7fffffff;
+ if (register_size (0) == 4)
+ {
+ unsigned int pswa;
+ collect_register_by_name (regcache, "pswa", &pswa);
+ return pswa & 0x7fffffff;
+ }
+ else
+ {
+ unsigned long pc;
+ collect_register_by_name (regcache, "pswa", &pc);
+ return pc;
+ }
+}
+
+static void
+s390_set_pc (struct regcache *regcache, CORE_ADDR newpc)
+{
+ if (register_size (0) == 4)
+ {
+ unsigned int pswa;
+ collect_register_by_name (regcache, "pswa", &pswa);
+ pswa = (pswa & 0x80000000) | (newpc & 0x7fffffff);
+ supply_register_by_name (regcache, "pswa", &pswa);
+ }
+ else
+ {
+ unsigned long pc = newpc;
+ supply_register_by_name (regcache, "pswa", &pc);
+ }
+}
+
+#ifdef __s390x__
+static unsigned long
+s390_get_hwcap (void)
+{
+ int wordsize = register_size (0);
+ unsigned char *data = alloca (2 * wordsize);
+ int offset = 0;
+
+ while ((*the_target->read_auxv) (offset, data, 2 * wordsize) == 2 * wordsize)
+ {
+ if (wordsize == 4)
+ {
+ unsigned int *data_p = (unsigned int *)data;
+ if (data_p[0] == AT_HWCAP)
+ return data_p[1];
+ }
+ else
+ {
+ unsigned long *data_p = (unsigned long *)data;
+ if (data_p[0] == AT_HWCAP)
+ return data_p[1];
+ }
+
+ offset += 2 * wordsize;
+ }
+
+ return 0;
+}
#endif
- return pc;
+
+static int
+s390_check_regset (int pid, int regset, int regsize)
+{
+ gdb_byte *buf = alloca (regsize);
+ struct iovec iov;
+
+ iov.iov_base = buf;
+ iov.iov_len = regsize;
+
+ if (ptrace (PTRACE_GETREGSET, pid, (long) regset, (long) &iov) < 0)
+ return 0;
+ else
+ return 1;
}
static void
-s390_set_pc (CORE_ADDR newpc)
+s390_arch_setup (void)
{
- unsigned long pc = newpc;
-#ifndef __s390x__
- pc |= 0x80000000;
+ struct regset_info *regset;
+
+ /* Check whether the kernel supports extra register sets. */
+ int pid = pid_of (get_thread_lwp (current_inferior));
+ int have_regset_last_break
+ = s390_check_regset (pid, NT_S390_LAST_BREAK, 8);
+ int have_regset_system_call
+ = s390_check_regset (pid, NT_S390_SYSTEM_CALL, 4);
+
+ /* Update target_regsets according to available register sets. */
+ for (regset = target_regsets; regset->fill_function != NULL; regset++)
+ if (regset->get_request == PTRACE_GETREGSET)
+ switch (regset->nt_type)
+ {
+ case NT_S390_LAST_BREAK:
+ regset->size = have_regset_last_break? 8 : 0;
+ break;
+ case NT_S390_SYSTEM_CALL:
+ regset->size = have_regset_system_call? 4 : 0;
+ break;
+ default:
+ break;
+ }
+
+ /* Assume 31-bit inferior process. */
+ if (have_regset_system_call)
+ init_registers_s390_linux32v2 ();
+ else if (have_regset_last_break)
+ init_registers_s390_linux32v1 ();
+ else
+ init_registers_s390_linux32 ();
+
+ the_low_target.num_regs = s390_num_regs;
+ the_low_target.regmap = s390_regmap;
+
+ /* On a 64-bit host, check the low bit of the (31-bit) PSWM
+ -- if this is one, we actually have a 64-bit inferior. */
+#ifdef __s390x__
+ {
+ unsigned int pswm;
+ struct regcache *regcache = new_register_cache ();
+ fetch_inferior_registers (regcache, find_regno ("pswm"));
+ collect_register_by_name (regcache, "pswm", &pswm);
+ free_register_cache (regcache);
+
+ if (pswm & 1)
+ {
+ if (have_regset_system_call)
+ init_registers_s390x_linux64v2 ();
+ else if (have_regset_last_break)
+ init_registers_s390x_linux64v1 ();
+ else
+ init_registers_s390x_linux64 ();
+ }
+
+ /* For a 31-bit inferior, check whether the kernel supports
+ using the full 64-bit GPRs. */
+ else if (s390_get_hwcap () & HWCAP_S390_HIGH_GPRS)
+ {
+ if (have_regset_system_call)
+ init_registers_s390_linux64v2 ();
+ else if (have_regset_last_break)
+ init_registers_s390_linux64v1 ();
+ else
+ init_registers_s390_linux64 ();
+
+ the_low_target.num_regs = s390_num_regs_3264;
+ the_low_target.regmap = s390_regmap_3264;
+ }
+ }
#endif
- supply_register_by_name ("pswa", &pc);
}
+
static int
s390_breakpoint_at (CORE_ADDR pc)
{
struct linux_target_ops the_low_target = {
+ s390_arch_setup,
s390_num_regs,
s390_regmap,
+ NULL,
s390_cannot_fetch_register,
s390_cannot_store_register,
+ NULL, /* fetch_register */
s390_get_pc,
s390_set_pc,
s390_breakpoint,
NULL,
s390_breakpoint_len,
s390_breakpoint_at,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ s390_collect_ptrace_register,
+ s390_supply_ptrace_register,
};
-
projects / deliverable / binutils-gdb.git / blobdiff