mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
61baf725ec
This applies the second part of GDB's End of Year Procedure, which
updates the copyright year range in all of GDB's files.
gdb/ChangeLog:
Update copyright year range in all GDB files.
247 lines
6.9 KiB
C
247 lines
6.9 KiB
C
/* GNU/Linux/PowerPC specific low level interface, for the in-process
|
|
agent library for GDB.
|
|
|
|
Copyright (C) 2016-2017 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 "server.h"
|
|
#include <sys/mman.h>
|
|
#include "tracepoint.h"
|
|
#include "linux-ppc-tdesc.h"
|
|
#include <elf.h>
|
|
#ifdef HAVE_GETAUXVAL
|
|
#include <sys/auxv.h>
|
|
#endif
|
|
|
|
/* These macros define the position of registers in the buffer collected
|
|
by the fast tracepoint jump pad. */
|
|
#define FT_CR_R0 0
|
|
#define FT_CR_CR 32
|
|
#define FT_CR_XER 33
|
|
#define FT_CR_LR 34
|
|
#define FT_CR_CTR 35
|
|
#define FT_CR_PC 36
|
|
#define FT_CR_GPR(n) (FT_CR_R0 + (n))
|
|
|
|
static const int ppc_ft_collect_regmap[] = {
|
|
/* GPRs */
|
|
FT_CR_GPR (0), FT_CR_GPR (1), FT_CR_GPR (2),
|
|
FT_CR_GPR (3), FT_CR_GPR (4), FT_CR_GPR (5),
|
|
FT_CR_GPR (6), FT_CR_GPR (7), FT_CR_GPR (8),
|
|
FT_CR_GPR (9), FT_CR_GPR (10), FT_CR_GPR (11),
|
|
FT_CR_GPR (12), FT_CR_GPR (13), FT_CR_GPR (14),
|
|
FT_CR_GPR (15), FT_CR_GPR (16), FT_CR_GPR (17),
|
|
FT_CR_GPR (18), FT_CR_GPR (19), FT_CR_GPR (20),
|
|
FT_CR_GPR (21), FT_CR_GPR (22), FT_CR_GPR (23),
|
|
FT_CR_GPR (24), FT_CR_GPR (25), FT_CR_GPR (26),
|
|
FT_CR_GPR (27), FT_CR_GPR (28), FT_CR_GPR (29),
|
|
FT_CR_GPR (30), FT_CR_GPR (31),
|
|
/* FPRs - not collected. */
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
FT_CR_PC, /* PC */
|
|
-1, /* MSR */
|
|
FT_CR_CR, /* CR */
|
|
FT_CR_LR, /* LR */
|
|
FT_CR_CTR, /* CTR */
|
|
FT_CR_XER, /* XER */
|
|
-1, /* FPSCR */
|
|
};
|
|
|
|
#define PPC_NUM_FT_COLLECT_GREGS \
|
|
(sizeof (ppc_ft_collect_regmap) / sizeof(ppc_ft_collect_regmap[0]))
|
|
|
|
/* Supply registers collected by the fast tracepoint jump pad.
|
|
BUF is the second argument we pass to gdb_collect in jump pad. */
|
|
|
|
void
|
|
supply_fast_tracepoint_registers (struct regcache *regcache,
|
|
const unsigned char *buf)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PPC_NUM_FT_COLLECT_GREGS; i++)
|
|
{
|
|
if (ppc_ft_collect_regmap[i] == -1)
|
|
continue;
|
|
supply_register (regcache, i,
|
|
((char *) buf)
|
|
+ ppc_ft_collect_regmap[i] * sizeof (long));
|
|
}
|
|
}
|
|
|
|
/* Return the value of register REGNUM. RAW_REGS is collected buffer
|
|
by jump pad. This function is called by emit_reg. */
|
|
|
|
ULONGEST
|
|
get_raw_reg (const unsigned char *raw_regs, int regnum)
|
|
{
|
|
if (regnum >= PPC_NUM_FT_COLLECT_GREGS)
|
|
return 0;
|
|
if (ppc_ft_collect_regmap[regnum] == -1)
|
|
return 0;
|
|
|
|
return *(unsigned long *) (raw_regs
|
|
+ ppc_ft_collect_regmap[regnum] * sizeof (long));
|
|
}
|
|
|
|
/* Allocate buffer for the jump pads. The branch instruction has a reach
|
|
of +/- 32MiB, and the executable is loaded at 0x10000000 (256MiB).
|
|
|
|
64-bit: To maximize the area of executable that can use tracepoints,
|
|
try allocating at 0x10000000 - size initially, decreasing until we hit
|
|
a free area.
|
|
|
|
32-bit: ld.so loads dynamic libraries right below the executable, so
|
|
we cannot depend on that area (dynamic libraries can be quite large).
|
|
Instead, aim right after the executable - at sbrk(0). This will
|
|
cause future brk to fail, and malloc will fallback to mmap. */
|
|
|
|
void *
|
|
alloc_jump_pad_buffer (size_t size)
|
|
{
|
|
#ifdef __powerpc64__
|
|
uintptr_t addr;
|
|
uintptr_t exec_base = getauxval (AT_PHDR);
|
|
int pagesize;
|
|
void *res;
|
|
|
|
if (exec_base == 0)
|
|
exec_base = 0x10000000;
|
|
|
|
pagesize = sysconf (_SC_PAGE_SIZE);
|
|
if (pagesize == -1)
|
|
perror_with_name ("sysconf");
|
|
|
|
addr = exec_base - size;
|
|
|
|
/* size should already be page-aligned, but this can't hurt. */
|
|
addr &= ~(pagesize - 1);
|
|
|
|
/* Search for a free area. If we hit 0, we're out of luck. */
|
|
for (; addr; addr -= pagesize)
|
|
{
|
|
/* No MAP_FIXED - we don't want to zap someone's mapping. */
|
|
res = mmap ((void *) addr, size,
|
|
PROT_READ | PROT_WRITE | PROT_EXEC,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
|
|
/* If we got what we wanted, return. */
|
|
if ((uintptr_t) res == addr)
|
|
return res;
|
|
|
|
/* If we got a mapping, but at a wrong address, undo it. */
|
|
if (res != MAP_FAILED)
|
|
munmap (res, size);
|
|
}
|
|
|
|
return NULL;
|
|
#else
|
|
void *target = sbrk (0);
|
|
void *res = mmap (target, size, PROT_READ | PROT_WRITE | PROT_EXEC,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
|
|
if (res == target)
|
|
return res;
|
|
|
|
if (res != MAP_FAILED)
|
|
munmap (res, size);
|
|
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
/* Return target_desc to use for IPA, given the tdesc index passed by
|
|
gdbserver. */
|
|
|
|
const struct target_desc *
|
|
get_ipa_tdesc (int idx)
|
|
{
|
|
switch (idx)
|
|
{
|
|
#ifdef __powerpc64__
|
|
case PPC_TDESC_BASE:
|
|
return tdesc_powerpc_64l;
|
|
case PPC_TDESC_ALTIVEC:
|
|
return tdesc_powerpc_altivec64l;
|
|
case PPC_TDESC_CELL:
|
|
return tdesc_powerpc_cell64l;
|
|
case PPC_TDESC_VSX:
|
|
return tdesc_powerpc_vsx64l;
|
|
case PPC_TDESC_ISA205:
|
|
return tdesc_powerpc_isa205_64l;
|
|
case PPC_TDESC_ISA205_ALTIVEC:
|
|
return tdesc_powerpc_isa205_altivec64l;
|
|
case PPC_TDESC_ISA205_VSX:
|
|
return tdesc_powerpc_isa205_vsx64l;
|
|
#else
|
|
case PPC_TDESC_BASE:
|
|
return tdesc_powerpc_32l;
|
|
case PPC_TDESC_ALTIVEC:
|
|
return tdesc_powerpc_altivec32l;
|
|
case PPC_TDESC_CELL:
|
|
return tdesc_powerpc_cell32l;
|
|
case PPC_TDESC_VSX:
|
|
return tdesc_powerpc_vsx32l;
|
|
case PPC_TDESC_ISA205:
|
|
return tdesc_powerpc_isa205_32l;
|
|
case PPC_TDESC_ISA205_ALTIVEC:
|
|
return tdesc_powerpc_isa205_altivec32l;
|
|
case PPC_TDESC_ISA205_VSX:
|
|
return tdesc_powerpc_isa205_vsx32l;
|
|
case PPC_TDESC_E500:
|
|
return tdesc_powerpc_e500l;
|
|
#endif
|
|
default:
|
|
internal_error (__FILE__, __LINE__,
|
|
"unknown ipa tdesc index: %d", idx);
|
|
#ifdef __powerpc64__
|
|
return tdesc_powerpc_64l;
|
|
#else
|
|
return tdesc_powerpc_32l;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
|
|
/* Initialize ipa_tdesc and others. */
|
|
|
|
void
|
|
initialize_low_tracepoint (void)
|
|
{
|
|
#ifdef __powerpc64__
|
|
init_registers_powerpc_64l ();
|
|
init_registers_powerpc_altivec64l ();
|
|
init_registers_powerpc_cell64l ();
|
|
init_registers_powerpc_vsx64l ();
|
|
init_registers_powerpc_isa205_64l ();
|
|
init_registers_powerpc_isa205_altivec64l ();
|
|
init_registers_powerpc_isa205_vsx64l ();
|
|
#else
|
|
init_registers_powerpc_32l ();
|
|
init_registers_powerpc_altivec32l ();
|
|
init_registers_powerpc_cell32l ();
|
|
init_registers_powerpc_vsx32l ();
|
|
init_registers_powerpc_isa205_32l ();
|
|
init_registers_powerpc_isa205_altivec32l ();
|
|
init_registers_powerpc_isa205_vsx32l ();
|
|
init_registers_powerpc_e500l ();
|
|
#endif
|
|
}
|