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author | Simon Marchi <simon.marchi@polymtl.ca> | 2012-12-18 01:08:09 (GMT) |
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committer | Chris Metcalf <cmetcalf@tilera.com> | 2012-12-18 19:53:06 (GMT) |
commit | 7be68284bd201174bc6663b010cb56867a874276 (patch) | |
tree | 643e809627d815d460595b437217df20f75d32d6 /arch | |
parent | 395e095ed92b1ccfe74c90fee4cc637cff468ea7 (diff) | |
download | linux-7be68284bd201174bc6663b010cb56867a874276.tar.xz |
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')
-rw-r--r-- | 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) { |