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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2020-02-28 01:14:48 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-04-01 05:30:49 +0200 |
| commit | da529d4739abbb7681b1804c5b9bf615a5796f43 (patch) | |
| tree | 9503f2737aca992d2cd357c4dc03795e97418929 /arch/powerpc/kernel/ptrace/ptrace-noadv.c | |
| parent | powerpc/ptrace: create ptrace_get_debugreg() (diff) | |
| download | linux-da529d4739abbb7681b1804c5b9bf615a5796f43.tar.xz linux-da529d4739abbb7681b1804c5b9bf615a5796f43.zip | |
powerpc/ptrace: create ppc_gethwdinfo()
Create ippc_gethwdinfo() to handle PPC_PTRACE_GETHWDBGINFO and
reduce ifdef mess
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/82fefcc1ec75b96cece792878217a5d85ecda0c2.1582848567.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/kernel/ptrace/ptrace-noadv.c')
| -rw-r--r-- | arch/powerpc/kernel/ptrace/ptrace-noadv.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/ptrace/ptrace-noadv.c b/arch/powerpc/kernel/ptrace/ptrace-noadv.c index a6ad492badc6..f87e7c5c3bf3 100644 --- a/arch/powerpc/kernel/ptrace/ptrace-noadv.c +++ b/arch/powerpc/kernel/ptrace/ptrace-noadv.c @@ -39,6 +39,26 @@ void user_disable_single_step(struct task_struct *task) clear_tsk_thread_flag(task, TIF_SINGLESTEP); } +void ppc_gethwdinfo(struct ppc_debug_info *dbginfo) +{ + dbginfo->version = 1; + dbginfo->num_instruction_bps = 0; + if (ppc_breakpoint_available()) + dbginfo->num_data_bps = 1; + else + dbginfo->num_data_bps = 0; + dbginfo->num_condition_regs = 0; + dbginfo->data_bp_alignment = sizeof(long); + dbginfo->sizeof_condition = 0; + if (IS_ENABLED(CONFIG_HAVE_HW_BREAKPOINT)) { + dbginfo->features = PPC_DEBUG_FEATURE_DATA_BP_RANGE; + if (dawr_enabled()) + dbginfo->features |= PPC_DEBUG_FEATURE_DATA_BP_DAWR; + } else { + dbginfo->features = 0; + } +} + int ptrace_get_debugreg(struct task_struct *child, unsigned long addr, unsigned long __user *datalp) { |