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* ppc-linux-nat.c (have_ptrace_getsetregs): New variable. 

(have_ptrace_getsetfpregs): Likewise.
	fetch_all_gp_regs): New function.
	(fetch_gp_regs): New function.
	(fetch_all_fp_regs): Likewise.
	(fetch_fp_regs): New function.
	(fetch_ppc_registers): Using the new methods to fetch general-
	purpose and floating-pointer registers.
	(store_all_gp_regs): New function.
	(store_gp_regs): Likewise.
	(store_all_fp_regs): New function.
	(store_fp_regs): Likewise.
	(store_ppc_registers): Using the new methods to store general-
	purpose and floating-pointer registers.
cgen-1_1-branch
Sergio Durigan Junior 17 years ago
parent
291e98bea0
commit
1dfe79e8d5
2 changed files with 281 additions and 9 deletions
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  1. 17
      gdb/ChangeLog
  2. 273
      gdb/ppc-linux-nat.c

17
gdb/ChangeLog
View File

@ -1,3 +1,20 @@
2009-05-08 Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com>
* ppc-linux-nat.c (have_ptrace_getsetregs): New variable.
(have_ptrace_getsetfpregs): Likewise.
fetch_all_gp_regs): New function.
(fetch_gp_regs): New function.
(fetch_all_fp_regs): Likewise.
(fetch_fp_regs): New function.
(fetch_ppc_registers): Using the new methods to fetch general-
purpose and floating-pointer registers.
(store_all_gp_regs): New function.
(store_gp_regs): Likewise.
(store_all_fp_regs): New function.
(store_fp_regs): Likewise.
(store_ppc_registers): Using the new methods to store general-
purpose and floating-pointer registers.
2009-05-08 Doug Evans <dje@google.com>
* linux-nat.c (linux_xfer_siginfo): Delete unused locals lp, n.

273
gdb/ppc-linux-nat.c
View File

@ -108,6 +108,21 @@
#define PTRACE_GETSIGINFO 0x4202
#endif
/* Similarly for the general-purpose (gp0 -- gp31)
and floating-point registers (fp0 -- fp31). */
#ifndef PTRACE_GETREGS
#define PTRACE_GETREGS 12
#endif
#ifndef PTRACE_SETREGS
#define PTRACE_SETREGS 13
#endif
#ifndef PTRACE_GETFPREGS
#define PTRACE_GETFPREGS 14
#endif
#ifndef PTRACE_SETFPREGS
#define PTRACE_SETFPREGS 15
#endif
/* This oddity is because the Linux kernel defines elf_vrregset_t as
an array of 33 16 bytes long elements. I.e. it leaves out vrsave.
However the PTRACE_GETVRREGS and PTRACE_SETVRREGS requests return
@ -218,6 +233,18 @@ int have_ptrace_getvrregs = 1;
error. */
int have_ptrace_getsetevrregs = 1;
/* Non-zero if our kernel may support the PTRACE_GETREGS and
PTRACE_SETREGS requests, for reading and writing the
general-purpose registers. Zero if we've tried one of
them and gotten an error. */
int have_ptrace_getsetregs = 1;
/* Non-zero if our kernel may support the PTRACE_GETFPREGS and
PTRACE_SETFPREGS requests, for reading and writing the
floating-pointers registers. Zero if we've tried one of
them and gotten an error. */
int have_ptrace_getsetfpregs = 1;
/* *INDENT-OFF* */
/* registers layout, as presented by the ptrace interface:
PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
@ -601,6 +628,112 @@ fetch_altivec_registers (struct regcache *regcache, int tid)
supply_vrregset (regcache, &regs);
}
/* This function actually issues the request to ptrace, telling
it to get all general-purpose registers and put them into the
specified regset.
If the ptrace request does not exist, this function returns 0
and properly sets the have_ptrace_* flag. If the request fails,
this function calls perror_with_name. Otherwise, if the request
succeeds, then the regcache gets filled and 1 is returned. */
static int
fetch_all_gp_regs (struct regcache *regcache, int tid)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
gdb_gregset_t gregset;
if (ptrace (PTRACE_GETREGS, tid, 0, (void *) &gregset) < 0)
{
if (errno == EIO)
{
have_ptrace_getsetregs = 0;
return 0;
}
perror_with_name (_("Couldn't get general-purpose registers."));
}
supply_gregset (regcache, (const gdb_gregset_t *) &gregset);
return 1;
}
/* This is a wrapper for the fetch_all_gp_regs function. It is
responsible for verifying if this target has the ptrace request
that can be used to fetch all general-purpose registers at one
shot. If it doesn't, then we should fetch them using the
old-fashioned way, which is to iterate over the registers and
request them one by one. */
static void
fetch_gp_regs (struct regcache *regcache, int tid)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
int i;
if (have_ptrace_getsetregs)
if (fetch_all_gp_regs (regcache, tid))
return;
/* If we've hit this point, it doesn't really matter which
architecture we are using. We just need to read the
registers in the "old-fashioned way". */
for (i = 0; i < ppc_num_gprs; i++)
fetch_register (regcache, tid, tdep->ppc_gp0_regnum + i);
}
/* This function actually issues the request to ptrace, telling
it to get all floating-point registers and put them into the
specified regset.
If the ptrace request does not exist, this function returns 0
and properly sets the have_ptrace_* flag. If the request fails,
this function calls perror_with_name. Otherwise, if the request
succeeds, then the regcache gets filled and 1 is returned. */
static int
fetch_all_fp_regs (struct regcache *regcache, int tid)
{
gdb_fpregset_t fpregs;
if (ptrace (PTRACE_GETFPREGS, tid, 0, (void *) &fpregs) < 0)
{
if (errno == EIO)
{
have_ptrace_getsetfpregs = 0;
return 0;
}
perror_with_name (_("Couldn't get floating-point registers."));
}
supply_fpregset (regcache, (const gdb_fpregset_t *) &fpregs);
return 1;
}
/* This is a wrapper for the fetch_all_fp_regs function. It is
responsible for verifying if this target has the ptrace request
that can be used to fetch all floating-point registers at one
shot. If it doesn't, then we should fetch them using the
old-fashioned way, which is to iterate over the registers and
request them one by one. */
static void
fetch_fp_regs (struct regcache *regcache, int tid)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
int i;
if (have_ptrace_getsetfpregs)
if (fetch_all_fp_regs (regcache, tid))
return;
/* If we've hit this point, it doesn't really matter which
architecture we are using. We just need to read the
registers in the "old-fashioned way". */
for (i = 0; i < ppc_num_fprs; i++)
fetch_register (regcache, tid, tdep->ppc_fp0_regnum + i);
}
static void
fetch_ppc_registers (struct regcache *regcache, int tid)
{
@ -608,11 +741,9 @@ fetch_ppc_registers (struct regcache *regcache, int tid)
struct gdbarch *gdbarch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
for (i = 0; i < ppc_num_gprs; i++)
fetch_register (regcache, tid, tdep->ppc_gp0_regnum + i);
fetch_gp_regs (regcache, tid);
if (tdep->ppc_fp0_regnum >= 0)
for (i = 0; i < ppc_num_fprs; i++)
fetch_register (regcache, tid, tdep->ppc_fp0_regnum + i);
fetch_fp_regs (regcache, tid);
fetch_register (regcache, tid, gdbarch_pc_regnum (gdbarch));
if (tdep->ppc_ps_regnum != -1)
fetch_register (regcache, tid, tdep->ppc_ps_regnum);
@ -970,18 +1101,142 @@ store_altivec_registers (const struct regcache *regcache, int tid)
perror_with_name (_("Couldn't write AltiVec registers"));
}
/* This function actually issues the request to ptrace, telling
it to store all general-purpose registers present in the specified
regset.
If the ptrace request does not exist, this function returns 0
and properly sets the have_ptrace_* flag. If the request fails,
this function calls perror_with_name. Otherwise, if the request
succeeds, then the regcache is stored and 1 is returned. */
static int
store_all_gp_regs (const struct regcache *regcache, int tid, int regno)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
gdb_gregset_t gregset;
if (ptrace (PTRACE_GETREGS, tid, 0, (void *) &gregset) < 0)
{
if (errno == EIO)
{
have_ptrace_getsetregs = 0;
return 0;
}
perror_with_name (_("Couldn't get general-purpose registers."));
}
fill_gregset (regcache, &gregset, regno);
if (ptrace (PTRACE_SETREGS, tid, 0, (void *) &gregset) < 0)
{
if (errno == EIO)
{
have_ptrace_getsetregs = 0;
return 0;
}
perror_with_name (_("Couldn't set general-purpose registers."));
}
return 1;
}
/* This is a wrapper for the store_all_gp_regs function. It is
responsible for verifying if this target has the ptrace request
that can be used to store all general-purpose registers at one
shot. If it doesn't, then we should store them using the
old-fashioned way, which is to iterate over the registers and
store them one by one. */
static void
store_ppc_registers (const struct regcache *regcache, int tid)
store_gp_regs (const struct regcache *regcache, int tid, int regno)
{
int i;
struct gdbarch *gdbarch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
int i;
if (have_ptrace_getsetregs)
if (store_all_gp_regs (regcache, tid, regno))
return;
/* If we hit this point, it doesn't really matter which
architecture we are using. We just need to store the
registers in the "old-fashioned way". */
for (i = 0; i < ppc_num_gprs; i++)
store_register (regcache, tid, tdep->ppc_gp0_regnum + i);
}
/* This function actually issues the request to ptrace, telling
it to store all floating-point registers present in the specified
regset.
If the ptrace request does not exist, this function returns 0
and properly sets the have_ptrace_* flag. If the request fails,
this function calls perror_with_name. Otherwise, if the request
succeeds, then the regcache is stored and 1 is returned. */
static int
store_all_fp_regs (const struct regcache *regcache, int tid, int regno)
{
gdb_fpregset_t fpregs;
if (ptrace (PTRACE_GETFPREGS, tid, 0, (void *) &fpregs) < 0)
{
if (errno == EIO)
{
have_ptrace_getsetfpregs = 0;
return 0;
}
perror_with_name (_("Couldn't get floating-point registers."));
}
fill_fpregset (regcache, &fpregs, regno);
if (ptrace (PTRACE_SETFPREGS, tid, 0, (void *) &fpregs) < 0)
{
if (errno == EIO)
{
have_ptrace_getsetfpregs = 0;
return 0;
}
perror_with_name (_("Couldn't set floating-point registers."));
}
return 1;
}
/* This is a wrapper for the store_all_fp_regs function. It is
responsible for verifying if this target has the ptrace request
that can be used to store all floating-point registers at one
shot. If it doesn't, then we should store them using the
old-fashioned way, which is to iterate over the registers and
store them one by one. */
static void
store_fp_regs (const struct regcache *regcache, int tid, int regno)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
int i;
if (have_ptrace_getsetfpregs)
if (store_all_fp_regs (regcache, tid, regno))
return;
/* If we hit this point, it doesn't really matter which
architecture we are using. We just need to store the
registers in the "old-fashioned way". */
for (i = 0; i < ppc_num_fprs; i++)
store_register (regcache, tid, tdep->ppc_fp0_regnum + i);
}
static void
store_ppc_registers (const struct regcache *regcache, int tid)
{
int i;
struct gdbarch *gdbarch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
store_gp_regs (regcache, tid, -1);
if (tdep->ppc_fp0_regnum >= 0)
for (i = 0; i < ppc_num_fprs; i++)
store_register (regcache, tid, tdep->ppc_fp0_regnum + i);
store_fp_regs (regcache, tid, -1);
store_register (regcache, tid, gdbarch_pc_regnum (gdbarch));
if (tdep->ppc_ps_regnum != -1)
store_register (regcache, tid, tdep->ppc_ps_regnum);

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