On Fri, Apr 8, 2022 at 10:21 AM Sergey Matyukevich <geomatsi@xxxxxxxxx> wrote:
>
> From: Vladimir Isaev <isaev@xxxxxxxxxxxx>
>
> Add PT_REGS macros suitable for ARCompact and ARCv2.
>
> Signed-off-by: Vladimir Isaev <isaev@xxxxxxxxxxxx>
> ---
I have no way to test this unfortunately. Please be available to help
with ARC-specific issues if those come up. Thanks. Applied to
bpf-next.
> tools/include/uapi/asm/bpf_perf_event.h | 2 ++
> tools/lib/bpf/bpf_tracing.h | 23 +++++++++++++++++++++++
> 2 files changed, 25 insertions(+)
>
> diff --git a/tools/include/uapi/asm/bpf_perf_event.h b/tools/include/uapi/asm/bpf_perf_event.h
> index 39acc149d843..d7dfeab0d71a 100644
> --- a/tools/include/uapi/asm/bpf_perf_event.h
> +++ b/tools/include/uapi/asm/bpf_perf_event.h
> @@ -1,5 +1,7 @@
> #if defined(__aarch64__)
> #include "../../arch/arm64/include/uapi/asm/bpf_perf_event.h"
> +#elif defined(__arc__)
> +#include "../../arch/arc/include/uapi/asm/bpf_perf_event.h"
> #elif defined(__s390__)
> #include "../../arch/s390/include/uapi/asm/bpf_perf_event.h"
> #elif defined(__riscv)
> diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h
> index e3a8c947e89f..01ce121c302d 100644
> --- a/tools/lib/bpf/bpf_tracing.h
> +++ b/tools/lib/bpf/bpf_tracing.h
> @@ -27,6 +27,9 @@
> #elif defined(__TARGET_ARCH_riscv)
> #define bpf_target_riscv
> #define bpf_target_defined
> +#elif defined(__TARGET_ARCH_arc)
> + #define bpf_target_arc
> + #define bpf_target_defined
> #else
>
> /* Fall back to what the compiler says */
> @@ -54,6 +57,9 @@
> #elif defined(__riscv) && __riscv_xlen == 64
> #define bpf_target_riscv
> #define bpf_target_defined
> +#elif defined(__arc__)
> + #define bpf_target_arc
> + #define bpf_target_defined
> #endif /* no compiler target */
>
> #endif
> @@ -233,6 +239,23 @@ struct pt_regs___arm64 {
> /* riscv does not select ARCH_HAS_SYSCALL_WRAPPER. */
> #define PT_REGS_SYSCALL_REGS(ctx) ctx
>
> +#elif defined(bpf_target_arc)
> +
> +/* arc provides struct user_pt_regs instead of struct pt_regs to userspace */
> +#define __PT_REGS_CAST(x) ((const struct user_regs_struct *)(x))
> +#define __PT_PARM1_REG scratch.r0
> +#define __PT_PARM2_REG scratch.r1
> +#define __PT_PARM3_REG scratch.r2
> +#define __PT_PARM4_REG scratch.r3
> +#define __PT_PARM5_REG scratch.r4
> +#define __PT_RET_REG scratch.blink
> +#define __PT_FP_REG __unsupported__
> +#define __PT_RC_REG scratch.r0
> +#define __PT_SP_REG scratch.sp
> +#define __PT_IP_REG scratch.ret
> +/* arc does not select ARCH_HAS_SYSCALL_WRAPPER. */
> +#define PT_REGS_SYSCALL_REGS(ctx) ctx
> +
> #endif
>
> #if defined(bpf_target_defined)
> --
> 2.35.1
>
