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

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

gdb:

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

	* arm-linux-nat.c (fetch_register): Use PTRACE_GETREGSET.
	(fetch_regs): Likewise.
	(store_regs): Use PTRACE_SETREGSET.
	(store_register): Likewise.
This commit is contained in:
Yao Qi
2015-06-01 12:13:02 +01:00
parent 7efe48d196
commit 10766686b0
2 changed files with 82 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_register): Use PTRACE_GETREGSET.
(fetch_regs): Likewise.
(store_regs): Use PTRACE_SETREGSET.
(store_register): Likewise.
2015-06-01 Yao Qi <yao.qi@linaro.org> 2015-06-01 Yao Qi <yao.qi@linaro.org>
* arm-linux-nat.c (arm_linux_read_description): Check whether * arm-linux-nat.c (arm_linux_read_description): Check whether

77
gdb/arm-linux-nat.c
View File

@@ -225,7 +225,18 @@ fetch_register (struct regcache *regcache, int regno)
/* Get the thread id for the ptrace call. */ /* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid); tid = GET_THREAD_ID (inferior_ptid);
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs); if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &regs;
iov.iov_len = sizeof (regs);
ret = ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov);
}
else
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs);
if (ret < 0) if (ret < 0)
{ {
warning (_("Unable to fetch general register.")); warning (_("Unable to fetch general register."));
@@ -267,7 +278,18 @@ fetch_regs (struct regcache *regcache)
/* Get the thread id for the ptrace call. */ /* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid); tid = GET_THREAD_ID (inferior_ptid);
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs); if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &regs;
iov.iov_len = sizeof (regs);
ret = ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov);
}
else
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs);
if (ret < 0) if (ret < 0)
{ {
warning (_("Unable to fetch general registers.")); warning (_("Unable to fetch general registers."));
@@ -306,7 +328,18 @@ store_register (const struct regcache *regcache, int regno)
tid = GET_THREAD_ID (inferior_ptid); tid = GET_THREAD_ID (inferior_ptid);
/* Get the general registers from the process. */ /* Get the general registers from the process. */
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs); if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &regs;
iov.iov_len = sizeof (regs);
ret = ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov);
}
else
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs);
if (ret < 0) if (ret < 0)
{ {
warning (_("Unable to fetch general registers.")); warning (_("Unable to fetch general registers."));
@@ -322,7 +355,18 @@ store_register (const struct regcache *regcache, int regno)
regcache_raw_collect (regcache, ARM_PC_REGNUM, regcache_raw_collect (regcache, ARM_PC_REGNUM,
(char *) &regs[ARM_PC_REGNUM]); (char *) &regs[ARM_PC_REGNUM]);
ret = ptrace (PTRACE_SETREGS, tid, 0, &regs); if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &regs;
iov.iov_len = sizeof (regs);
ret = ptrace (PTRACE_SETREGSET, tid, NT_PRSTATUS, &iov);
}
else
ret = ptrace (PTRACE_SETREGS, tid, 0, &regs);
if (ret < 0) if (ret < 0)
{ {
warning (_("Unable to store general register.")); warning (_("Unable to store general register."));
@@ -340,7 +384,18 @@ store_regs (const struct regcache *regcache)
tid = GET_THREAD_ID (inferior_ptid); tid = GET_THREAD_ID (inferior_ptid);
/* Fetch the general registers. */ /* Fetch the general registers. */
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs); if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &regs;
iov.iov_len = sizeof (regs);
ret = ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov);
}
else
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs);
if (ret < 0) if (ret < 0)
{ {
warning (_("Unable to fetch general registers.")); warning (_("Unable to fetch general registers."));
@@ -357,7 +412,17 @@ store_regs (const struct regcache *regcache)
regcache_raw_collect (regcache, ARM_PS_REGNUM, regcache_raw_collect (regcache, ARM_PS_REGNUM,
(char *) &regs[ARM_CPSR_GREGNUM]); (char *) &regs[ARM_CPSR_GREGNUM]);
ret = ptrace (PTRACE_SETREGS, tid, 0, &regs); if (have_ptrace_getregset)
{
struct iovec iov;
iov.iov_base = &regs;
iov.iov_len = sizeof (regs);
ret = ptrace (PTRACE_SETREGSET, tid, NT_PRSTATUS, &iov);
}
else
ret = ptrace (PTRACE_SETREGS, tid, 0, &regs);
if (ret < 0) if (ret < 0)
{ {