Messages in this thread Patch in this message | | | From | Simon Marchi <> | Subject | [PATCH v3 1/3] arch/tile: implement user_regset interface on tile | Date | Mon, 17 Dec 2012 20:08:09 -0500 |
| |
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> --- v2 included change for all tile architectures (not just tilegx) v3 changed #include <uapi/arch/chip.h> to <arch/chip.h>
arch/tile/kernel/ptrace.c | 62 +++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 62 insertions(+), 0 deletions(-)
diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c index b32bc3f..882e381 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, ®s); + + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, ®s, 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, ®s, 0, + sizeof(regs)); + if (ret) + return ret; + + putregs(target, ®s); + + 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) { -- 1.7.1
| |