/* GNU/Linux/PowerPC specific low level interface, for the remote server for
GDB.
- Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005, 2007, 2008,
- 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 1995-2015 Free Software Foundation, Inc.
This file is part of GDB.
#include <elf.h>
#include <asm/ptrace.h>
-/* These are in <asm/cputable.h> in current kernels. */
-#define PPC_FEATURE_HAS_VSX 0x00000080
-#define PPC_FEATURE_HAS_ALTIVEC 0x10000000
-#define PPC_FEATURE_HAS_SPE 0x00800000
-#define PPC_FEATURE_CELL 0x00010000
-#define PPC_FEATURE_HAS_DFP 0x00000400
+#include "nat/ppc-linux.h"
static unsigned long ppc_hwcap;
/* Defined in auto-generated file powerpc-32l.c. */
void init_registers_powerpc_32l (void);
+extern const struct target_desc *tdesc_powerpc_32l;
+
/* Defined in auto-generated file powerpc-altivec32l.c. */
void init_registers_powerpc_altivec32l (void);
+extern const struct target_desc *tdesc_powerpc_altivec32l;
+
/* Defined in auto-generated file powerpc-cell32l.c. */
void init_registers_powerpc_cell32l (void);
+extern const struct target_desc *tdesc_powerpc_cell32l;
+
/* Defined in auto-generated file powerpc-vsx32l.c. */
void init_registers_powerpc_vsx32l (void);
+extern const struct target_desc *tdesc_powerpc_vsx32l;
+
/* Defined in auto-generated file powerpc-isa205-32l.c. */
void init_registers_powerpc_isa205_32l (void);
+extern const struct target_desc *tdesc_powerpc_isa205_32l;
+
/* Defined in auto-generated file powerpc-isa205-altivec32l.c. */
void init_registers_powerpc_isa205_altivec32l (void);
+extern const struct target_desc *tdesc_powerpc_isa205_altivec32l;
+
/* Defined in auto-generated file powerpc-isa205-vsx32l.c. */
void init_registers_powerpc_isa205_vsx32l (void);
+extern const struct target_desc *tdesc_powerpc_isa205_vsx32l;
+
/* Defined in auto-generated file powerpc-e500l.c. */
void init_registers_powerpc_e500l (void);
+extern const struct target_desc *tdesc_powerpc_e500l;
+
/* Defined in auto-generated file powerpc-64l.c. */
void init_registers_powerpc_64l (void);
+extern const struct target_desc *tdesc_powerpc_64l;
+
/* Defined in auto-generated file powerpc-altivec64l.c. */
void init_registers_powerpc_altivec64l (void);
+extern const struct target_desc *tdesc_powerpc_altivec64l;
+
/* Defined in auto-generated file powerpc-cell64l.c. */
void init_registers_powerpc_cell64l (void);
+extern const struct target_desc *tdesc_powerpc_cell64l;
+
/* Defined in auto-generated file powerpc-vsx64l.c. */
void init_registers_powerpc_vsx64l (void);
+extern const struct target_desc *tdesc_powerpc_vsx64l;
+
/* Defined in auto-generated file powerpc-isa205-64l.c. */
void init_registers_powerpc_isa205_64l (void);
+extern const struct target_desc *tdesc_powerpc_isa205_64l;
+
/* Defined in auto-generated file powerpc-isa205-altivec64l.c. */
void init_registers_powerpc_isa205_altivec64l (void);
+extern const struct target_desc *tdesc_powerpc_isa205_altivec64l;
+
/* Defined in auto-generated file powerpc-isa205-vsx64l.c. */
void init_registers_powerpc_isa205_vsx64l (void);
+extern const struct target_desc *tdesc_powerpc_isa205_vsx64l;
#define ppc_num_regs 73
-/* This sometimes isn't defined. */
-#ifndef PT_ORIG_R3
-#define PT_ORIG_R3 34
-#endif
-#ifndef PT_TRAP
-#define PT_TRAP 40
-#endif
-
#ifdef __powerpc64__
/* We use a constant for FPSCR instead of PT_FPSCR, because
many shipped PPC64 kernels had the wrong value in ptrace.h. */
static int
ppc_cannot_store_register (int regno)
{
+ const struct target_desc *tdesc = current_process ()->tdesc;
+
#ifndef __powerpc64__
/* Some kernels do not allow us to store fpscr. */
- if (!(ppc_hwcap & PPC_FEATURE_HAS_SPE) && regno == find_regno ("fpscr"))
+ if (!(ppc_hwcap & PPC_FEATURE_HAS_SPE)
+ && regno == find_regno (tdesc, "fpscr"))
return 2;
#endif
/* Some kernels do not allow us to store orig_r3 or trap. */
- if (regno == find_regno ("orig_r3")
- || regno == find_regno ("trap"))
+ if (regno == find_regno (tdesc, "orig_r3")
+ || regno == find_regno (tdesc, "trap"))
return 2;
return 0;
static void
ppc_collect_ptrace_register (struct regcache *regcache, int regno, char *buf)
{
- int size = register_size (regno);
-
memset (buf, 0, sizeof (long));
- if (size < sizeof (long))
- collect_register (regcache, regno, buf + sizeof (long) - size);
+ if (__BYTE_ORDER == __LITTLE_ENDIAN)
+ {
+ /* Little-endian values always sit at the left end of the buffer. */
+ collect_register (regcache, regno, buf);
+ }
+ else if (__BYTE_ORDER == __BIG_ENDIAN)
+ {
+ /* Big-endian values sit at the right end of the buffer. In case of
+ registers whose sizes are smaller than sizeof (long), we must use a
+ padding to access them correctly. */
+ int size = register_size (regcache->tdesc, regno);
+
+ if (size < sizeof (long))
+ collect_register (regcache, regno, buf + sizeof (long) - size);
+ else
+ collect_register (regcache, regno, buf);
+ }
else
- collect_register (regcache, regno, buf);
+ perror_with_name ("Unexpected byte order");
}
static void
ppc_supply_ptrace_register (struct regcache *regcache,
int regno, const char *buf)
{
- int size = register_size (regno);
- if (size < sizeof (long))
- supply_register (regcache, regno, buf + sizeof (long) - size);
+ if (__BYTE_ORDER == __LITTLE_ENDIAN)
+ {
+ /* Little-endian values always sit at the left end of the buffer. */
+ supply_register (regcache, regno, buf);
+ }
+ else if (__BYTE_ORDER == __BIG_ENDIAN)
+ {
+ /* Big-endian values sit at the right end of the buffer. In case of
+ registers whose sizes are smaller than sizeof (long), we must use a
+ padding to access them correctly. */
+ int size = register_size (regcache->tdesc, regno);
+
+ if (size < sizeof (long))
+ supply_register (regcache, regno, buf + sizeof (long) - size);
+ else
+ supply_register (regcache, regno, buf);
+ }
else
- supply_register (regcache, regno, buf);
+ perror_with_name ("Unexpected byte order");
}
int curr_insn;
int curr_r0;
- if (register_size (0) == 4)
+ if (register_size (regcache->tdesc, 0) == 4)
{
unsigned int pc, r0, r3, r4;
collect_register_by_name (regcache, "pc", &pc);
{
unsigned int pc;
(*the_target->read_memory) (addr, (unsigned char *) &pc, 4);
- return ((CORE_ADDR)1 << 63) | ((CORE_ADDR)fd << 32) | (CORE_ADDR) (pc - 4);
+ return ((CORE_ADDR)1 << 63)
+ | ((CORE_ADDR)fd << 32) | (CORE_ADDR) (pc - 4);
}
- else if (register_size (0) == 4)
+ else if (register_size (regcache->tdesc, 0) == 4)
{
unsigned int pc;
collect_register_by_name (regcache, "pc", &pc);
unsigned int newpc = pc;
(*the_target->write_memory) (addr, (unsigned char *) &newpc, 4);
}
- else if (register_size (0) == 4)
+ else if (register_size (regcache->tdesc, 0) == 4)
{
unsigned int newpc = pc;
supply_register_by_name (regcache, "pc", &newpc);
static int
ppc_get_hwcap (unsigned long *valp)
{
- int wordsize = register_size (0);
- unsigned char *data = alloca (2 * wordsize);
+ const struct target_desc *tdesc = current_process ()->tdesc;
+ int wordsize = register_size (tdesc, 0);
+ unsigned char *data = (unsigned char *) alloca (2 * wordsize);
int offset = 0;
while ((*the_target->read_auxv) (offset, data, 2 * wordsize) == 2 * wordsize)
return 0;
}
-static void
-ppc_arch_setup (void)
-{
-#ifdef __powerpc64__
- long msr;
- struct regcache *regcache;
-
- /* On a 64-bit host, assume 64-bit inferior process with no
- AltiVec registers. Reset ppc_hwcap to ensure that the
- collect_register call below does not fail. */
- init_registers_powerpc_64l ();
- ppc_hwcap = 0;
-
- /* Only if the high bit of the MSR is set, we actually have
- a 64-bit inferior. */
- regcache = get_thread_regcache (current_inferior, 1);
- collect_register_by_name (regcache, "msr", &msr);
- if (msr < 0)
- {
- ppc_get_hwcap (&ppc_hwcap);
- if (ppc_hwcap & PPC_FEATURE_CELL)
- init_registers_powerpc_cell64l ();
- else if (ppc_hwcap & PPC_FEATURE_HAS_VSX)
- {
- /* Power ISA 2.05 (implemented by Power 6 and newer processors)
- increases the FPSCR from 32 bits to 64 bits. Even though Power 7
- supports this ISA version, it doesn't have PPC_FEATURE_ARCH_2_05
- set, only PPC_FEATURE_ARCH_2_06. Since for now the only bits
- used in the higher half of the register are for Decimal Floating
- Point, we check if that feature is available to decide the size
- of the FPSCR. */
- if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
- init_registers_powerpc_isa205_vsx64l ();
- else
- init_registers_powerpc_vsx64l ();
- }
- else if (ppc_hwcap & PPC_FEATURE_HAS_ALTIVEC)
- {
- if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
- init_registers_powerpc_isa205_altivec64l ();
- else
- init_registers_powerpc_altivec64l ();
- }
-
- return;
- }
-#endif
-
- /* OK, we have a 32-bit inferior. */
- init_registers_powerpc_32l ();
-
- ppc_get_hwcap (&ppc_hwcap);
- if (ppc_hwcap & PPC_FEATURE_CELL)
- init_registers_powerpc_cell32l ();
- else if (ppc_hwcap & PPC_FEATURE_HAS_VSX)
- {
- if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
- init_registers_powerpc_isa205_vsx32l ();
- else
- init_registers_powerpc_vsx32l ();
- }
- else if (ppc_hwcap & PPC_FEATURE_HAS_ALTIVEC)
- {
- if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
- init_registers_powerpc_isa205_altivec32l ();
- else
- init_registers_powerpc_altivec32l ();
- }
-
- /* On 32-bit machines, check for SPE registers.
- Set the low target's regmap field as appropriately. */
#ifndef __powerpc64__
- the_low_target.regmap = ppc_regmap;
- if (ppc_hwcap & PPC_FEATURE_HAS_SPE)
- {
- init_registers_powerpc_e500l ();
- the_low_target.regmap = ppc_regmap_e500;
- }
-
- /* If the FPSCR is 64-bit wide, we need to fetch the whole 64-bit
- slot and not just its second word. The PT_FPSCR supplied in a
- 32-bit GDB compilation doesn't reflect this. */
- if (register_size (70) == 8)
- ppc_regmap[70] = (48 + 2*32) * sizeof (long);
+static int ppc_regmap_adjusted;
#endif
-}
+
/* Correct in either endianness.
This instruction is "twge r2, r2", which GDB uses as a software
static const unsigned int ppc_breakpoint = 0x7d821008;
#define ppc_breakpoint_len 4
+/* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
+
+static const gdb_byte *
+ppc_sw_breakpoint_from_kind (int kind, int *size)
+{
+ *size = ppc_breakpoint_len;
+ return (const gdb_byte *) &ppc_breakpoint;
+}
+
static int
ppc_breakpoint_at (CORE_ADDR where)
{
ppc_collect_ptrace_register (regcache, i, (char *) buf + ppc_regmap[i]);
}
-#ifndef PTRACE_GETVSXREGS
-#define PTRACE_GETVSXREGS 27
-#define PTRACE_SETVSXREGS 28
-#endif
-
#define SIZEOF_VSXREGS 32*8
static void
ppc_fill_vsxregset (struct regcache *regcache, void *buf)
{
int i, base;
- char *regset = buf;
+ char *regset = (char *) buf;
if (!(ppc_hwcap & PPC_FEATURE_HAS_VSX))
return;
- base = find_regno ("vs0h");
+ base = find_regno (regcache->tdesc, "vs0h");
for (i = 0; i < 32; i++)
collect_register (regcache, base + i, ®set[i * 8]);
}
ppc_store_vsxregset (struct regcache *regcache, const void *buf)
{
int i, base;
- const char *regset = buf;
+ const char *regset = (const char *) buf;
if (!(ppc_hwcap & PPC_FEATURE_HAS_VSX))
return;
- base = find_regno ("vs0h");
+ base = find_regno (regcache->tdesc, "vs0h");
for (i = 0; i < 32; i++)
supply_register (regcache, base + i, ®set[i * 8]);
}
-#ifndef PTRACE_GETVRREGS
-#define PTRACE_GETVRREGS 18
-#define PTRACE_SETVRREGS 19
-#endif
-
#define SIZEOF_VRREGS 33*16+4
static void
ppc_fill_vrregset (struct regcache *regcache, void *buf)
{
int i, base;
- char *regset = buf;
+ char *regset = (char *) buf;
if (!(ppc_hwcap & PPC_FEATURE_HAS_ALTIVEC))
return;
- base = find_regno ("vr0");
+ base = find_regno (regcache->tdesc, "vr0");
for (i = 0; i < 32; i++)
collect_register (regcache, base + i, ®set[i * 16]);
ppc_store_vrregset (struct regcache *regcache, const void *buf)
{
int i, base;
- const char *regset = buf;
+ const char *regset = (const char *) buf;
if (!(ppc_hwcap & PPC_FEATURE_HAS_ALTIVEC))
return;
- base = find_regno ("vr0");
+ base = find_regno (regcache->tdesc, "vr0");
for (i = 0; i < 32; i++)
supply_register (regcache, base + i, ®set[i * 16]);
supply_register_by_name (regcache, "vrsave", ®set[33 * 16]);
}
-#ifndef PTRACE_GETEVRREGS
-#define PTRACE_GETEVRREGS 20
-#define PTRACE_SETEVRREGS 21
-#endif
-
struct gdb_evrregset_t
{
unsigned long evr[32];
ppc_fill_evrregset (struct regcache *regcache, void *buf)
{
int i, ev0;
- struct gdb_evrregset_t *regset = buf;
+ struct gdb_evrregset_t *regset = (struct gdb_evrregset_t *) buf;
if (!(ppc_hwcap & PPC_FEATURE_HAS_SPE))
return;
- ev0 = find_regno ("ev0h");
+ ev0 = find_regno (regcache->tdesc, "ev0h");
for (i = 0; i < 32; i++)
collect_register (regcache, ev0 + i, ®set->evr[i]);
ppc_store_evrregset (struct regcache *regcache, const void *buf)
{
int i, ev0;
- const struct gdb_evrregset_t *regset = buf;
+ const struct gdb_evrregset_t *regset = (const struct gdb_evrregset_t *) buf;
if (!(ppc_hwcap & PPC_FEATURE_HAS_SPE))
return;
- ev0 = find_regno ("ev0h");
+ ev0 = find_regno (regcache->tdesc, "ev0h");
for (i = 0; i < 32; i++)
supply_register (regcache, ev0 + i, ®set->evr[i]);
supply_register_by_name (regcache, "spefscr", ®set->spefscr);
}
-struct regset_info target_regsets[] = {
+static struct regset_info ppc_regsets[] = {
/* List the extra register sets before GENERAL_REGS. That way we will
fetch them every time, but still fall back to PTRACE_PEEKUSER for the
general registers. Some kernels support these, but not the newer
PPC_PTRACE_GETREGS. */
- { PTRACE_GETVSXREGS, PTRACE_SETVSXREGS, SIZEOF_VSXREGS, EXTENDED_REGS,
+ { PTRACE_GETVSXREGS, PTRACE_SETVSXREGS, 0, SIZEOF_VSXREGS, EXTENDED_REGS,
ppc_fill_vsxregset, ppc_store_vsxregset },
- { PTRACE_GETVRREGS, PTRACE_SETVRREGS, SIZEOF_VRREGS, EXTENDED_REGS,
+ { PTRACE_GETVRREGS, PTRACE_SETVRREGS, 0, SIZEOF_VRREGS, EXTENDED_REGS,
ppc_fill_vrregset, ppc_store_vrregset },
- { PTRACE_GETEVRREGS, PTRACE_SETEVRREGS, 32 * 4 + 8 + 4, EXTENDED_REGS,
+ { PTRACE_GETEVRREGS, PTRACE_SETEVRREGS, 0, 32 * 4 + 8 + 4, EXTENDED_REGS,
ppc_fill_evrregset, ppc_store_evrregset },
- { 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL },
- { 0, 0, -1, -1, NULL, NULL }
+ { 0, 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL },
+ NULL_REGSET
};
+static struct usrregs_info ppc_usrregs_info =
+ {
+ ppc_num_regs,
+ ppc_regmap,
+ };
+
+static struct regsets_info ppc_regsets_info =
+ {
+ ppc_regsets, /* regsets */
+ 0, /* num_regsets */
+ NULL, /* disabled_regsets */
+ };
+
+static struct regs_info regs_info =
+ {
+ NULL, /* regset_bitmap */
+ &ppc_usrregs_info,
+ &ppc_regsets_info
+ };
+
+static const struct regs_info *
+ppc_regs_info (void)
+{
+ return ®s_info;
+}
+
+static void
+ppc_arch_setup (void)
+{
+ const struct target_desc *tdesc;
+#ifdef __powerpc64__
+ long msr;
+ struct regcache *regcache;
+
+ /* On a 64-bit host, assume 64-bit inferior process with no
+ AltiVec registers. Reset ppc_hwcap to ensure that the
+ collect_register call below does not fail. */
+ tdesc = tdesc_powerpc_64l;
+ current_process ()->tdesc = tdesc;
+ ppc_hwcap = 0;
+
+ regcache = new_register_cache (tdesc);
+ fetch_inferior_registers (regcache, find_regno (tdesc, "msr"));
+ collect_register_by_name (regcache, "msr", &msr);
+ free_register_cache (regcache);
+ if (ppc64_64bit_inferior_p (msr))
+ {
+ ppc_get_hwcap (&ppc_hwcap);
+ if (ppc_hwcap & PPC_FEATURE_CELL)
+ tdesc = tdesc_powerpc_cell64l;
+ else if (ppc_hwcap & PPC_FEATURE_HAS_VSX)
+ {
+ /* Power ISA 2.05 (implemented by Power 6 and newer processors)
+ increases the FPSCR from 32 bits to 64 bits. Even though Power 7
+ supports this ISA version, it doesn't have PPC_FEATURE_ARCH_2_05
+ set, only PPC_FEATURE_ARCH_2_06. Since for now the only bits
+ used in the higher half of the register are for Decimal Floating
+ Point, we check if that feature is available to decide the size
+ of the FPSCR. */
+ if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
+ tdesc = tdesc_powerpc_isa205_vsx64l;
+ else
+ tdesc = tdesc_powerpc_vsx64l;
+ }
+ else if (ppc_hwcap & PPC_FEATURE_HAS_ALTIVEC)
+ {
+ if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
+ tdesc = tdesc_powerpc_isa205_altivec64l;
+ else
+ tdesc = tdesc_powerpc_altivec64l;
+ }
+
+ current_process ()->tdesc = tdesc;
+ return;
+ }
+#endif
+
+ /* OK, we have a 32-bit inferior. */
+ tdesc = tdesc_powerpc_32l;
+ current_process ()->tdesc = tdesc;
+
+ ppc_get_hwcap (&ppc_hwcap);
+ if (ppc_hwcap & PPC_FEATURE_CELL)
+ tdesc = tdesc_powerpc_cell32l;
+ else if (ppc_hwcap & PPC_FEATURE_HAS_VSX)
+ {
+ if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
+ tdesc = tdesc_powerpc_isa205_vsx32l;
+ else
+ tdesc = tdesc_powerpc_vsx32l;
+ }
+ else if (ppc_hwcap & PPC_FEATURE_HAS_ALTIVEC)
+ {
+ if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
+ tdesc = tdesc_powerpc_isa205_altivec32l;
+ else
+ tdesc = tdesc_powerpc_altivec32l;
+ }
+
+ /* On 32-bit machines, check for SPE registers.
+ Set the low target's regmap field as appropriately. */
+#ifndef __powerpc64__
+ if (ppc_hwcap & PPC_FEATURE_HAS_SPE)
+ tdesc = tdesc_powerpc_e500l;
+
+ if (!ppc_regmap_adjusted)
+ {
+ if (ppc_hwcap & PPC_FEATURE_HAS_SPE)
+ ppc_usrregs_info.regmap = ppc_regmap_e500;
+
+ /* If the FPSCR is 64-bit wide, we need to fetch the whole
+ 64-bit slot and not just its second word. The PT_FPSCR
+ supplied in a 32-bit GDB compilation doesn't reflect
+ this. */
+ if (register_size (tdesc, 70) == 8)
+ ppc_regmap[70] = (48 + 2*32) * sizeof (long);
+
+ ppc_regmap_adjusted = 1;
+ }
+#endif
+ current_process ()->tdesc = tdesc;
+}
+
struct linux_target_ops the_low_target = {
ppc_arch_setup,
- ppc_num_regs,
- ppc_regmap,
+ ppc_regs_info,
ppc_cannot_fetch_register,
ppc_cannot_store_register,
+ NULL, /* fetch_register */
ppc_get_pc,
ppc_set_pc,
- (const unsigned char *) &ppc_breakpoint,
- ppc_breakpoint_len,
+ NULL, /* breakpoint_kind_from_pc */
+ ppc_sw_breakpoint_from_kind,
NULL,
0,
ppc_breakpoint_at,
+ NULL, /* supports_z_point_type */
NULL,
NULL,
NULL,
ppc_collect_ptrace_register,
ppc_supply_ptrace_register,
};
+
+void
+initialize_low_arch (void)
+{
+ /* Initialize the Linux target descriptions. */
+
+ 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 ();
+ 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 ();
+
+ initialize_regsets_info (&ppc_regsets_info);
+}
projects / deliverable / binutils-gdb.git / blobdiff