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authorSimon Marchi <simon.marchi@polymtl.ca>2012-12-17 20:08:09 -0500
committerChris Metcalf <cmetcalf@tilera.com>2012-12-18 14:53:06 -0500
commit7be68284bd201174bc6663b010cb56867a874276 (patch)
tree643e809627d815d460595b437217df20f75d32d6 /arch/tile/kernel
parent395e095ed92b1ccfe74c90fee4cc637cff468ea7 (diff)
downloadvexpress-lsk-7be68284bd201174bc6663b010cb56867a874276.tar.gz
arch/tile: implement user_regset interface on tile
This is a basic implementation of user_regset for the tile architecture. It reuses the basic blocks that were already there. Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel')
-rw-r--r--arch/tile/kernel/ptrace.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c
index b32bc3f9d63..882e3816477 100644
--- a/arch/tile/kernel/ptrace.c
+++ b/arch/tile/kernel/ptrace.c
@@ -19,7 +19,10 @@
#include <linux/kprobes.h>
#include <linux/compat.h>
#include <linux/uaccess.h>
+#include <linux/regset.h>
+#include <linux/elf.h>
#include <asm/traps.h>
+#include <arch/chip.h>
void user_enable_single_step(struct task_struct *child)
{
@@ -80,6 +83,65 @@ static void putregs(struct task_struct *child, struct pt_regs *uregs)
*regs = *uregs;
}
+enum tile_regset {
+ REGSET_GPR,
+};
+
+static int tile_gpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ struct pt_regs regs;
+
+ getregs(target, &regs);
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &regs, 0,
+ sizeof(regs));
+}
+
+static int tile_gpr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+ struct pt_regs regs;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &regs, 0,
+ sizeof(regs));
+ if (ret)
+ return ret;
+
+ putregs(target, &regs);
+
+ return 0;
+}
+
+static const struct user_regset tile_user_regset[] = {
+ [REGSET_GPR] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(elf_greg_t),
+ .align = sizeof(elf_greg_t),
+ .get = tile_gpr_get,
+ .set = tile_gpr_set,
+ },
+};
+
+static const struct user_regset_view tile_user_regset_view = {
+ .name = CHIP_ARCH_NAME,
+ .e_machine = ELF_ARCH,
+ .ei_osabi = ELF_OSABI,
+ .regsets = tile_user_regset,
+ .n = ARRAY_SIZE(tile_user_regset),
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+ return &tile_user_regset_view;
+}
+
long arch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{