mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
28e7fd6234
Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
482 lines
13 KiB
C
482 lines
13 KiB
C
/* GNU/Linux S/390 specific low level interface, for the remote server
|
|
for GDB.
|
|
Copyright (C) 2001-2013 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
/* This file is used for both 31-bit and 64-bit S/390 systems. */
|
|
|
|
#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>
|
|
|
|
#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_GPR0, PT_GPR1, PT_GPR2, PT_GPR3,
|
|
PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7,
|
|
PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11,
|
|
PT_GPR12, PT_GPR13, PT_GPR14, 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,
|
|
|
|
#ifndef __s390x__
|
|
PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI,
|
|
PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI,
|
|
PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI,
|
|
PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI,
|
|
#else
|
|
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,
|
|
#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)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
s390_cannot_store_register (int regno)
|
|
{
|
|
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 (struct regcache *regcache, void *buf)
|
|
{
|
|
int 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, 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 }
|
|
};
|
|
|
|
|
|
static const unsigned char s390_breakpoint[] = { 0, 1 };
|
|
#define s390_breakpoint_len 2
|
|
|
|
static CORE_ADDR
|
|
s390_get_pc (struct regcache *regcache)
|
|
{
|
|
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
|
|
|
|
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_arch_setup (void)
|
|
{
|
|
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
|
|
}
|
|
|
|
|
|
static int
|
|
s390_breakpoint_at (CORE_ADDR pc)
|
|
{
|
|
unsigned char c[s390_breakpoint_len];
|
|
read_inferior_memory (pc, c, s390_breakpoint_len);
|
|
return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0;
|
|
}
|
|
|
|
|
|
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,
|
|
s390_breakpoint_len,
|
|
NULL,
|
|
s390_breakpoint_len,
|
|
s390_breakpoint_at,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
s390_collect_ptrace_register,
|
|
s390_supply_ptrace_register,
|
|
};
|