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/* Native-dependent code for Solaris x86.
Copyright (C) 1988-2024 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/>. */
#include "regcache.h"
#include <sys/reg.h>
#include <sys/procfs.h>
#include "gregset.h"
#include "target.h"
#include "procfs.h"
/* This file provids the (temporary) glue between the Solaris x86
target dependent code and the machine independent SVR4 /proc
support. */
/* Solaris 10 (Solaris 2.10, SunOS 5.10) and up support two process
data models, the traditional 32-bit data model (ILP32) and the
64-bit data model (LP64). The format of /proc depends on the data
model of the observer (the controlling process, GDB in our case).
The Solaris header files conveniently define PR_MODEL_NATIVE to the
data model of the controlling process. If its value is
PR_MODEL_LP64, we know that GDB is being compiled as a 64-bit
program.
Note that a 32-bit GDB won't be able to debug a 64-bit target
process using /proc on Solaris. */
#if PR_MODEL_NATIVE == PR_MODEL_LP64
#include "amd64-nat.h"
#include "amd64-tdep.h"
/* Mapping between the general-purpose registers in gregset_t format
and GDB's register cache layout. */
/* From <sys/regset.h>. */
static int amd64_sol2_gregset64_reg_offset[] = {
14 * 8, /* %rax */
11 * 8, /* %rbx */
13 * 8, /* %rcx */
12 * 8, /* %rdx */
9 * 8, /* %rsi */
8 * 8, /* %rdi */
10 * 8, /* %rbp */
20 * 8, /* %rsp */
7 * 8, /* %r8 ... */
6 * 8,
5 * 8,
4 * 8,
3 * 8,
2 * 8,
1 * 8,
0 * 8, /* ... %r15 */
17 * 8, /* %rip */
19 * 8, /* %eflags */
18 * 8, /* %cs */
21 * 8, /* %ss */
25 * 8, /* %ds */
24 * 8, /* %es */
22 * 8, /* %fs */
23 * 8 /* %gs */
};
/* 32-bit registers are provided by Solaris in 64-bit format, so just
give a subset of the list above. */
static int amd64_sol2_gregset32_reg_offset[] = {
14 * 8, /* %eax */
13 * 8, /* %ecx */
12 * 8, /* %edx */
11 * 8, /* %ebx */
20 * 8, /* %esp */
10 * 8, /* %ebp */
9 * 8, /* %esi */
8 * 8, /* %edi */
17 * 8, /* %eip */
19 * 8, /* %eflags */
18 * 8, /* %cs */
21 * 8, /* %ss */
25 * 8, /* %ds */
24 * 8, /* %es */
22 * 8, /* %fs */
23 * 8 /* %gs */
};
void
supply_gregset (struct regcache *regcache, const prgregset_t *gregs)
{
amd64_supply_native_gregset (regcache, gregs, -1);
}
void
supply_fpregset (struct regcache *regcache, const prfpregset_t *fpregs)
{
amd64_supply_fxsave (regcache, -1, fpregs);
}
void
fill_gregset (const struct regcache *regcache,
prgregset_t *gregs, int regnum)
{
amd64_collect_native_gregset (regcache, gregs, regnum);
}
void
fill_fpregset (const struct regcache *regcache,
prfpregset_t *fpregs, int regnum)
{
amd64_collect_fxsave (regcache, regnum, fpregs);
}
#else /* PR_MODEL_NATIVE != PR_MODEL_LP64 */
#include "i386-tdep.h"
#include "i387-tdep.h"
/* The `/proc' interface divides the target machine's register set up
into two different sets, the general purpose register set (gregset)
and the floating-point register set (fpregset).
The actual structure is, of course, naturally machine dependent, and is
different for each set of registers. For the i386 for example, the
general-purpose register set is typically defined by:
typedef int gregset_t[19]; (in <sys/regset.h>)
#define GS 0 (in <sys/reg.h>)
#define FS 1
...
#define UESP 17
#define SS 18
and the floating-point set by:
typedef struct fpregset {
union {
struct fpchip_state // fp extension state //
{
int state[27]; // 287/387 saved state //
int status; // status word saved at //
// exception //
} fpchip_state;
struct fp_emul_space // for emulators //
{
char fp_emul[246];
char fp_epad[2];
} fp_emul_space;
int f_fpregs[62]; // union of the above //
} fp_reg_set;
long f_wregs[33]; // saved weitek state //
} fpregset_t;
Incidentally fpchip_state contains the FPU state in the same format
as used by the "fsave" instruction, and that's the only thing we
support here. I don't know how the emulator stores it state. The
Weitek stuff definitely isn't supported.
The routines defined here, provide the packing and unpacking of
gregset_t and fpregset_t formatted data. */
/* Mapping between the general-purpose registers in `/proc'
format and GDB's register array layout. */
static int regmap[] =
{
11 /* EAX */,
10 /* ECX */,
9 /* EDX */,
8 /* EBX */,
17 /* UESP */,
6 /* EBP */,
5 /* ESI */,
4 /* EDI */,
14 /* EIP */,
16 /* EFL */,
15 /* CS */,
18 /* SS */,
3 /* DS */,
2 /* ES */,
1 /* FS */,
0 /* GS */
};
/* Fill GDB's register array with the general-purpose register values
in *GREGSETP. */
void
supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
{
const greg_t *regp = (const greg_t *) gregsetp;
int regnum;
for (regnum = 0; regnum < I386_NUM_GREGS; regnum++)
regcache->raw_supply (regnum, regp + regmap[regnum]);
}
/* Fill register REGNUM (if it is a general-purpose register) in
*GREGSETPS with the value in GDB's register array. If REGNUM is -1,
do this for all registers. */
void
fill_gregset (const struct regcache *regcache,
gregset_t *gregsetp, int regnum)
{
greg_t *regp = (greg_t *) gregsetp;
int i;
for (i = 0; i < I386_NUM_GREGS; i++)
if (regnum == -1 || regnum == i)
regcache->raw_collect (i, regp + regmap[i]);
}
/* Fill GDB's register array with the floating-point register values in
*FPREGSETP. */
void
supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
{
if (gdbarch_fp0_regnum (regcache->arch ()) == 0)
return;
i387_supply_fsave (regcache, -1, fpregsetp);
}
/* Fill register REGNO (if it is a floating-point register) in
*FPREGSETP with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
fill_fpregset (const struct regcache *regcache,
fpregset_t *fpregsetp, int regno)
{
if (gdbarch_fp0_regnum (regcache->arch ()) == 0)
return;
i387_collect_fsave (regcache, regno, fpregsetp);
}
#endif
void _initialize_amd64_sol2_nat ();
void
_initialize_amd64_sol2_nat ()
{
#if PR_MODEL_NATIVE == PR_MODEL_LP64
amd64_native_gregset32_reg_offset = amd64_sol2_gregset32_reg_offset;
amd64_native_gregset32_num_regs =
ARRAY_SIZE (amd64_sol2_gregset32_reg_offset);
amd64_native_gregset64_reg_offset = amd64_sol2_gregset64_reg_offset;
amd64_native_gregset64_num_regs =
ARRAY_SIZE (amd64_sol2_gregset64_reg_offset);
#endif
}
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