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/* GNU/Linux S/390 specific low level interface, for the remote server
   for GDB.
   Copyright (C) 2001, 2002, 2005, 2006, 2007, 2008, 2009, 2010
   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 <asm/ptrace.h>
#include <elf.h>
 
#ifndef HWCAP_S390_HIGH_GPRS
#define HWCAP_S390_HIGH_GPRS 512
#endif
 
/* Defined in auto-generated file s390-linux32.c.  */
void init_registers_s390_linux32 (void);
/* Defined in auto-generated file s390-linux64.c.  */
void init_registers_s390_linux64 (void);
/* Defined in auto-generated file s390x-linux64.c.  */
void init_registers_s390x_linux64 (void);
 
#define s390_num_regs 51
 
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
};
 
#ifdef __s390x__
#define s390_num_regs_3264 67
 
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,
};
#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_PSWADDR
               || (regaddr >= PT_GPR0 && regaddr <= PT_GPR15))
        collect_register (regcache, regno, buf + sizeof (long) - size);
      else
        collect_register (regcache, regno, buf);
 
      /* When debugging a 32-bit inferior on a 64-bit host, make sure
         the 31-bit addressing mode bit is set in the PSW mask.  */
      if (regaddr == PT_PSWMASK)
        buf[size] |= 0x80;
    }
  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_PSWADDR
               || (regaddr >= PT_GPR0 && regaddr <= PT_GPR15))
        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]);
    }
}
 
struct regset_info target_regsets[] = {
  { 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL },
  { 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 pc;
      collect_register_by_name (regcache, "pswa", &pc);
#ifndef __s390x__
      pc &= 0x7fffffff;
#endif
      return pc;
    }
  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 pc = newpc;
#ifndef __s390x__
      pc |= 0x80000000;
#endif
      supply_register_by_name (regcache, "pswa", &pc);
    }
  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 void
s390_arch_setup (void)
{
  /* Assume 31-bit inferior process.  */
  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 = get_thread_regcache (current_inferior, 1);
    collect_register_by_name (regcache, "pswm", &pswm);
    if (pswm & 1)
      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)
      {
        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,
  s390_cannot_fetch_register,
  s390_cannot_store_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,
};

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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [gdbserver/] [linux-s390-low.c] - Blame information for rev 280

Line No.	Rev	Author	Line
1	227	jeremybenn	`/* GNU/Linux S/390 specific low level interface, for the remote server`
2			`for GDB.`
3			`Copyright (C) 2001, 2002, 2005, 2006, 2007, 2008, 2009, 2010`
4			`Free Software Foundation, Inc.`
5
6			`This file is part of GDB.`
7
8			`This program is free software; you can redistribute it and/or modify`
9			`it under the terms of the GNU General Public License as published by`
10			`the Free Software Foundation; either version 3 of the License, or`
11			`(at your option) any later version.`
12
13			`This program is distributed in the hope that it will be useful,`
14			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
15			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
16			`GNU General Public License for more details.`
17
18			`You should have received a copy of the GNU General Public License`
19			`along with this program. If not, see <http://www.gnu.org/licenses/>. */`
20
21			`/* This file is used for both 31-bit and 64-bit S/390 systems. */`
22
23			`#include "server.h"`
24			`#include "linux-low.h"`
25
26			`#include <asm/ptrace.h>`
27			`#include <elf.h>`
28
29			`#ifndef HWCAP_S390_HIGH_GPRS`
30			`#define HWCAP_S390_HIGH_GPRS 512`
31			`#endif`
32
33			`/* Defined in auto-generated file s390-linux32.c. */`
34			`void init_registers_s390_linux32 (void);`
35			`/* Defined in auto-generated file s390-linux64.c. */`
36			`void init_registers_s390_linux64 (void);`
37			`/* Defined in auto-generated file s390x-linux64.c. */`
38			`void init_registers_s390x_linux64 (void);`
39
40			`#define s390_num_regs 51`
41
42			`static int s390_regmap[] = {`
43			`PT_PSWMASK, PT_PSWADDR,`
44
45			`PT_GPR0, PT_GPR1, PT_GPR2, PT_GPR3,`
46			`PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7,`
47			`PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11,`
48			`PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15,`
49
50			`PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3,`
51			`PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7,`
52			`PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11,`
53			`PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15,`
54
55			`PT_FPC,`
56
57			`#ifndef __s390x__`
58			`PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI,`
59			`PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI,`
60			`PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI,`
61			`PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI,`
62			`#else`
63			`PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3,`
64			`PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7,`
65			`PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11,`
66			`PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15,`
67			`#endif`
68			`};`
69
70			`#ifdef __s390x__`
71			`#define s390_num_regs_3264 67`
72
73			`static int s390_regmap_3264[] = {`
74			`PT_PSWMASK, PT_PSWADDR,`
75
76			`PT_GPR0, PT_GPR0, PT_GPR1, PT_GPR1, PT_GPR2, PT_GPR2, PT_GPR3, PT_GPR3,`
77			`PT_GPR4, PT_GPR4, PT_GPR5, PT_GPR5, PT_GPR6, PT_GPR6, PT_GPR7, PT_GPR7,`
78			`PT_GPR8, PT_GPR8, PT_GPR9, PT_GPR9, PT_GPR10, PT_GPR10, PT_GPR11, PT_GPR11,`
79			`PT_GPR12, PT_GPR12, PT_GPR13, PT_GPR13, PT_GPR14, PT_GPR14, PT_GPR15, PT_GPR15,`
80
81			`PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3,`
82			`PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7,`
83			`PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11,`
84			`PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15,`
85
86			`PT_FPC,`
87
88			`PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3,`
89			`PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7,`
90			`PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11,`
91			`PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15,`
92			`};`
93			`#endif`
94
95
96			`static int`
97			`s390_cannot_fetch_register (int regno)`
98			`{`
99			`return 0;`
100			`}`
101
102			`static int`
103			`s390_cannot_store_register (int regno)`
104			`{`
105			`return 0;`
106			`}`
107
108			`static void`
109			`s390_collect_ptrace_register (struct regcache regcache, int regno, char buf)`
110			`{`
111			`int size = register_size (regno);`
112			`if (size < sizeof (long))`
113			`{`
114			`int regaddr = the_low_target.regmap[regno];`
115
116			`memset (buf, 0, sizeof (long));`
117
118			`if ((regno ^ 1) < the_low_target.num_regs`
119			`&& the_low_target.regmap[regno ^ 1] == regaddr)`
120			`{`
121			`collect_register (regcache, regno & ~1, buf);`
122			`collect_register (regcache, (regno & ~1) + 1,`
123			`buf + sizeof (long) - size);`
124			`}`
125			`else if (regaddr == PT_PSWADDR`
126			`\|\| (regaddr >= PT_GPR0 && regaddr <= PT_GPR15))`
127			`collect_register (regcache, regno, buf + sizeof (long) - size);`
128			`else`
129			`collect_register (regcache, regno, buf);`
130
131			`/* When debugging a 32-bit inferior on a 64-bit host, make sure`
132			`the 31-bit addressing mode bit is set in the PSW mask. */`
133			`if (regaddr == PT_PSWMASK)`
134			`buf[size] \|= 0x80;`
135			`}`
136			`else`
137			`collect_register (regcache, regno, buf);`
138			`}`
139
140			`static void`
141			`s390_supply_ptrace_register (struct regcache regcache, int regno, const char buf)`
142			`{`
143			`int size = register_size (regno);`
144			`if (size < sizeof (long))`
145			`{`
146			`int regaddr = the_low_target.regmap[regno];`
147
148			`if ((regno ^ 1) < the_low_target.num_regs`
149			`&& the_low_target.regmap[regno ^ 1] == regaddr)`
150			`{`
151			`supply_register (regcache, regno & ~1, buf);`
152			`supply_register (regcache, (regno & ~1) + 1,`
153			`buf + sizeof (long) - size);`
154			`}`
155			`else if (regaddr == PT_PSWADDR`
156			`\|\| (regaddr >= PT_GPR0 && regaddr <= PT_GPR15))`
157			`supply_register (regcache, regno, buf + sizeof (long) - size);`
158			`else`
159			`supply_register (regcache, regno, buf);`
160			`}`
161			`else`
162			`supply_register (regcache, regno, buf);`
163			`}`
164
165			`/* Provide only a fill function for the general register set. ps_lgetregs`
166			`will use this for NPTL support. */`
167
168			`static void s390_fill_gregset (struct regcache regcache, void buf)`
169			`{`
170			`int i;`
171
172			`for (i = 0; i < the_low_target.num_regs; i++)`
173			`{`
174			`if (the_low_target.regmap[i] < PT_PSWMASK`
175			`\|\| the_low_target.regmap[i] > PT_ACR15)`
176			`continue;`
177
178			`s390_collect_ptrace_register (regcache, i, (char *) buf`
179			`+ the_low_target.regmap[i]);`
180			`}`
181			`}`
182
183			`struct regset_info target_regsets[] = {`
184			`{ 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL },`
185			`{ 0, 0, -1, -1, NULL, NULL }`
186			`};`
187
188
189			`static const unsigned char s390_breakpoint[] = { 0, 1 };`
190			`#define s390_breakpoint_len 2`
191
192			`static CORE_ADDR`
193			`s390_get_pc (struct regcache *regcache)`
194			`{`
195			`if (register_size (0) == 4)`
196			`{`
197			`unsigned int pc;`
198			`collect_register_by_name (regcache, "pswa", &pc);`
199			`#ifndef __s390x__`
200			`pc &= 0x7fffffff;`
201			`#endif`
202			`return pc;`
203			`}`
204			`else`
205			`{`
206			`unsigned long pc;`
207			`collect_register_by_name (regcache, "pswa", &pc);`
208			`return pc;`
209			`}`
210			`}`
211
212			`static void`
213			`s390_set_pc (struct regcache *regcache, CORE_ADDR newpc)`
214			`{`
215			`if (register_size (0) == 4)`
216			`{`
217			`unsigned int pc = newpc;`
218			`#ifndef __s390x__`
219			`pc \|= 0x80000000;`
220			`#endif`
221			`supply_register_by_name (regcache, "pswa", &pc);`
222			`}`
223			`else`
224			`{`
225			`unsigned long pc = newpc;`
226			`supply_register_by_name (regcache, "pswa", &pc);`
227			`}`
228			`}`
229
230			`#ifdef __s390x__`
231			`static unsigned long`
232			`s390_get_hwcap (void)`
233			`{`
234			`int wordsize = register_size (0);`
235			`unsigned char data = alloca (2 wordsize);`
236			`int offset = 0;`
237
238			`while ((the_target->read_auxv) (offset, data, 2 wordsize) == 2 * wordsize)`
239			`{`
240			`if (wordsize == 4)`
241			`{`
242			`unsigned int data_p = (unsigned int )data;`
243			`if (data_p[0] == AT_HWCAP)`
244			`return data_p[1];`
245			`}`
246			`else`
247			`{`
248			`unsigned long data_p = (unsigned long )data;`
249			`if (data_p[0] == AT_HWCAP)`
250			`return data_p[1];`
251			`}`
252
253			`offset += 2 * wordsize;`
254			`}`
255
256			`return 0;`
257			`}`
258			`#endif`
259
260			`static void`
261			`s390_arch_setup (void)`
262			`{`
263			`/* Assume 31-bit inferior process. */`
264			`init_registers_s390_linux32 ();`
265			`the_low_target.num_regs = s390_num_regs;`
266			`the_low_target.regmap = s390_regmap;`
267
268			`/* On a 64-bit host, check the low bit of the (31-bit) PSWM`
269			`-- if this is one, we actually have a 64-bit inferior. */`
270			`#ifdef __s390x__`
271			`{`
272			`unsigned int pswm;`
273			`struct regcache *regcache = get_thread_regcache (current_inferior, 1);`
274			`collect_register_by_name (regcache, "pswm", &pswm);`
275			`if (pswm & 1)`
276			`init_registers_s390x_linux64 ();`
277
278			`/* For a 31-bit inferior, check whether the kernel supports`
279			`using the full 64-bit GPRs. */`
280			`else if (s390_get_hwcap () & HWCAP_S390_HIGH_GPRS)`
281			`{`
282			`init_registers_s390_linux64 ();`
283			`the_low_target.num_regs = s390_num_regs_3264;`
284			`the_low_target.regmap = s390_regmap_3264;`
285			`}`
286			`}`
287			`#endif`
288			`}`
289
290
291			`static int`
292			`s390_breakpoint_at (CORE_ADDR pc)`
293			`{`
294			`unsigned char c[s390_breakpoint_len];`
295			`read_inferior_memory (pc, c, s390_breakpoint_len);`
296			`return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0;`
297			`}`
298
299
300			`struct linux_target_ops the_low_target = {`
301			`s390_arch_setup,`
302			`s390_num_regs,`
303			`s390_regmap,`
304			`s390_cannot_fetch_register,`
305			`s390_cannot_store_register,`
306			`s390_get_pc,`
307			`s390_set_pc,`
308			`s390_breakpoint,`
309			`s390_breakpoint_len,`
310			`NULL,`
311			`s390_breakpoint_len,`
312			`s390_breakpoint_at,`
313			`NULL,`
314			`NULL,`
315			`NULL,`
316			`NULL,`
317			`s390_collect_ptrace_register,`
318			`s390_supply_ptrace_register,`
319			`};`