diff options
| author | Yury Norov <ynorov@caviumnetworks.com> | 2017-01-05 16:14:48 +0530 |
|---|---|---|
| committer | Christoph Muellner <christoph.muellner@theobroma-systems.com> | 2018-04-26 21:43:46 +0200 |
| commit | f6e3f71177e8a0c9bbe19050700606b79013e1c3 (patch) | |
| tree | 262cc134260838c7db79dc098cd81c1b9f845afc | |
| parent | b5a8f6bf99f631f3ce1e3763f1ab485d3001deb8 (diff) | |
arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32
ILP32 has context-related structures different from both aarch32 and
aarch64/lp64. In this patch compat_arch_ptrace() renamed to
compat_a32_ptrace(), and compat_arch_ptrace() only makes choice between
compat_a32_ptrace() and new compat_ilp32_ptrace() handler.
compat_ilp32_ptrace() calls generic compat_ptrace_request() for all
requests except PTRACE_GETSIGMASK and PTRACE_SETSIGMASK, which need
special handling.
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Signed-off-by: Chengming Zhou <zhouchengming1@huawei.com>
| -rw-r--r-- | arch/arm64/kernel/ptrace.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 4d0a541d049b..da7f47c7e586 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -1038,9 +1038,11 @@ static const struct user_regset_view user_aarch64_view = { .regsets = aarch64_regsets, .n = ARRAY_SIZE(aarch64_regsets) }; -#ifdef CONFIG_AARCH32_EL0 +#ifdef CONFIG_COMPAT #include <linux/compat.h> +#endif +#ifdef CONFIG_AARCH32_EL0 enum compat_regset { REGSET_COMPAT_GPR, REGSET_COMPAT_VFP, @@ -1503,7 +1505,7 @@ static int compat_ptrace_sethbpregs(struct task_struct *tsk, compat_long_t num, } #endif /* CONFIG_HAVE_HW_BREAKPOINT */ -long compat_arch_ptrace(struct task_struct *child, compat_long_t request, +static long compat_a32_ptrace(struct task_struct *child, compat_long_t request, compat_ulong_t caddr, compat_ulong_t cdata) { unsigned long addr = caddr; @@ -1580,8 +1582,23 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, return ret; } + +#else +#define compat_a32_ptrace(child, request, caddr, cdata) (0) #endif /* CONFIG_AARCH32_EL0 */ +#ifdef CONFIG_COMPAT +long compat_arch_ptrace(struct task_struct *child, compat_long_t request, + compat_ulong_t caddr, compat_ulong_t cdata) +{ + if (is_a32_compat_task()) + return compat_a32_ptrace(child, request, caddr, cdata); + + /* ILP32 */ + return compat_ptrace_request(child, request, caddr, cdata); +} +#endif + const struct user_regset_view *task_user_regset_view(struct task_struct *task) { #ifdef CONFIG_AARCH32_EL0 |