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2003-12-03 Andrew Cagney <cagney@redhat.com>

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* ppc-linux-nat.c (store_register, fetch_register): Convert
	between ptrace and regcache's wordsize.
	(ppc_register_u_addr): Use the ptrace wordsize.
This commit is contained in:
Andrew Cagney
2003-12-03 19:37:03 +00:00
parent b52927b711
commit 56d0d96a62
2 changed files with 40 additions and 3 deletions
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6
gdb/ChangeLog
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@@ -1,3 +1,9 @@
2003-12-03 Andrew Cagney <cagney@redhat.com>
* ppc-linux-nat.c (store_register, fetch_register): Convert
between ptrace and regcache's wordsize.
(ppc_register_u_addr): Use the ptrace wordsize.
2003-12-02 Kevin Buettner <kevinb@redhat.com> 2003-12-02 Kevin Buettner <kevinb@redhat.com>
* frv-tdep.c (frv_gdbarch_init): Add case for fr550. * frv-tdep.c (frv_gdbarch_init): Add case for fr550.

37
gdb/ppc-linux-nat.c
View File

@@ -127,7 +127,9 @@ ppc_register_u_addr (int regno)
{ {
int u_addr = -1; int u_addr = -1;
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
int wordsize = tdep->wordsize; /* NOTE: cagney/2003-11-25: This is the word size used by the ptrace
interface, and not the wordsize of the program's ABI. */
int wordsize = sizeof (PTRACE_XFER_TYPE);
/* General purpose registers occupy 1 slot each in the buffer */ /* General purpose registers occupy 1 slot each in the buffer */
if (regno >= tdep->ppc_gp0_regnum && regno <= tdep->ppc_gplast_regnum ) if (regno >= tdep->ppc_gp0_regnum && regno <= tdep->ppc_gplast_regnum )
@@ -235,6 +237,9 @@ fetch_register (int tid, int regno)
return; return;
} }
/* Read the raw register using PTRACE_XFER_TYPE sized chunks. On a
32-bit platform, 64-bit floating-point registers will require two
transfers. */
for (i = 0; i < DEPRECATED_REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) for (i = 0; i < DEPRECATED_REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
{ {
errno = 0; errno = 0;
@@ -248,7 +253,19 @@ fetch_register (int tid, int regno)
perror_with_name (mess); perror_with_name (mess);
} }
} }
supply_register (regno, buf);
/* Now supply the register. Be careful to map between ptrace's and
the current_regcache's idea of the current wordsize. */
if ((regno >= FP0_REGNUM && regno < FP0_REGNUM +32)
|| gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_LITTLE)
/* FPs are always 64 bits. Little endian values are always found
at the left-hand end of the register. */
regcache_raw_supply (current_regcache, regno, buf);
else
/* Big endian register, need to fetch the right-hand end. */
regcache_raw_supply (current_regcache, regno,
(buf + sizeof (PTRACE_XFER_TYPE)
- register_size (current_gdbarch, regno)));
} }
static void static void
@@ -380,7 +397,21 @@ store_register (int tid, int regno)
if (regaddr == -1) if (regaddr == -1)
return; return;
regcache_collect (regno, buf); /* First collect the register value from the regcache. Be careful
to to convert the regcache's wordsize into ptrace's wordsize. */
memset (buf, 0, sizeof buf);
if ((regno >= FP0_REGNUM && regno < FP0_REGNUM + 32)
|| TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE)
/* Floats are always 64-bit. Little endian registers are always
at the left-hand end of the register cache. */
regcache_raw_collect (current_regcache, regno, buf);
else
/* Big-endian registers belong at the right-hand end of the
buffer. */
regcache_raw_collect (current_regcache, regno,
(buf + sizeof (PTRACE_XFER_TYPE)
- register_size (current_gdbarch, regno)));
for (i = 0; i < DEPRECATED_REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) for (i = 0; i < DEPRECATED_REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
{ {
errno = 0; errno = 0;