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Fetch and store FP registers by PTRACE_{G,S}ETREGSET 

If kernel supports PTRACE_GETREGSET, GDB uses PTRACE_{G,S}ETREGSET
to fetch and store FP registers.

gdb:

2015-06-01  Yao Qi  <yao.qi@linaro.org>

	* arm-linux-nat.c (fetch_fpregister): Use PTRACE_GETREGSET.
	(fetch_fpregs): Likewise.
	* arm-linux-nat.c (store_fpregister): Use PTRACE_SETREGSET.
	(store_fpregs): Likewise.
This commit is contained in:
Yao Qi 2015-06-01 12:13:02 +01:00
parent 10766686b0
commit df9d7ec9e7
2 changed files with 84 additions and 10 deletions
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7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2015-06-01 Yao Qi <yao.qi@linaro.org>
* arm-linux-nat.c (fetch_fpregister): Use PTRACE_GETREGSET.
(fetch_fpregs): Likewise.
* arm-linux-nat.c (store_fpregister): Use PTRACE_SETREGSET.
(store_fpregs): Likewise.
2015-06-01 Yao Qi <yao.qi@linaro.org>
* arm-linux-nat.c (fetch_register): Use PTRACE_GETREGSET.

87
gdb/arm-linux-nat.c
View File

@ -88,12 +88,23 @@ fetch_fpregister (struct regcache *regcache, int regno)
{
int ret, tid;
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Read the floating point state. */
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &fp;
iov.iov_len = ARM_LINUX_SIZEOF_NWFPE;
ret = ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iov);
}
else
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch floating point register."));
@ -121,9 +132,20 @@ fetch_fpregs (struct regcache *regcache)
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Read the floating point state. */
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &fp;
iov.iov_len = ARM_LINUX_SIZEOF_NWFPE;
ret = ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iov);
}
else
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch the floating point registers."));
@ -150,9 +172,20 @@ store_fpregister (const struct regcache *regcache, int regno)
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Read the floating point state. */
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &fp;
iov.iov_len = ARM_LINUX_SIZEOF_NWFPE;
ret = ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iov);
}
else
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch the floating point registers."));
@ -168,7 +201,18 @@ store_fpregister (const struct regcache *regcache, int regno)
if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
collect_nwfpe_register (regcache, regno, fp);
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &fp;
iov.iov_len = ARM_LINUX_SIZEOF_NWFPE;
ret = ptrace (PTRACE_SETREGSET, tid, NT_FPREGSET, &iov);
}
else
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to store floating point register."));
@ -187,9 +231,21 @@ store_fpregs (const struct regcache *regcache)
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Read the floating point state. */
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (have_ptrace_getregset)
{
elf_fpregset_t fpregs;
struct iovec iov;
iov.iov_base = &fpregs;
iov.iov_len = sizeof (fpregs);
ret = ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iov);
}
else
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch the floating point registers."));
@ -205,7 +261,18 @@ store_fpregs (const struct regcache *regcache)
if (REG_VALID == regcache_register_status (regcache, regno))
collect_nwfpe_register (regcache, regno, fp);
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &fp;
iov.iov_len = ARM_LINUX_SIZEOF_NWFPE;
ret = ptrace (PTRACE_SETREGSET, tid, NT_FPREGSET, &iov);
}
else
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to store floating point registers."));