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gdbserver: Add linux_get_hwcap

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In gdbserver, Tidy up calls to read HWCAP (and HWCAP2) by adding common
functions, removing the Arm, AArch64, PPC and S390 specific versions.

No functionality differences.

gdb/gdbserver/ChangeLog:

	* linux-aarch64-low.c (aarch64_get_hwcap): Remove function.
	(aarch64_arch_setup): Call linux_get_hwcap.
	* linux-arm-low.c (arm_get_hwcap): Remove function.
	(arm_read_description): Call linux_get_hwcap.
	* linux-low.c (linux_get_auxv): New function.
	(linux_get_hwcap): Likewise.
	(linux_get_hwcap2): Likewise.
	* linux-low.h (linux_get_hwcap): New declaration.
	(linux_get_hwcap2): Likewise.
	* linux-ppc-low.c (ppc_get_auxv): Remove function.
	(ppc_arch_setup): Call linux_get_hwcap.
	* linux-s390-low.c (s390_get_hwcap): Remove function.
	(s390_arch_setup): Call linux_get_hwcap.
This commit is contained in:
Alan Hayward
2019-03-25 10:44:11 +00:00
parent 7ea79cb3af
commit 974c89e088
7 changed files with 79 additions and 122 deletions
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27
gdb/gdbserver/linux-arm-low.c
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@@ -847,40 +847,15 @@ get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self)
return next_pc;
}
static int
arm_get_hwcap (unsigned long *valp)
{
unsigned char *data = (unsigned char *) alloca (8);
int offset = 0;
while ((*the_target->read_auxv) (offset, data, 8) == 8)
{
unsigned int *data_p = (unsigned int *)data;
if (data_p[0] == AT_HWCAP)
{
*valp = data_p[1];
return 1;
}
offset += 8;
}
*valp = 0;
return 0;
}
static const struct target_desc *
arm_read_description (void)
{
int pid = lwpid_of (current_thread);
unsigned long arm_hwcap = 0;
unsigned long arm_hwcap = linux_get_hwcap (4);
/* Query hardware watchpoint/breakpoint capabilities. */
arm_linux_init_hwbp_cap (pid);
if (arm_get_hwcap (&arm_hwcap) == 0)
return tdesc_arm;
if (arm_hwcap & HWCAP_IWMMXT)
return tdesc_arm_with_iwmmxt;