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riscv, libbpf: Add RISC-V (RV64) support to bpf_tracing.h
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Add macros for 64-bit RISC-V PT_REGS to bpf_tracing.h.

Signed-off-by: Björn Töpel <bjorn@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211028161057.520552-4-bjorn@kernel.org
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Björn Töpel authored and Daniel Borkmann committed Nov 1, 2021
1 parent b390d69 commit 589fed4
Showing 1 changed file with 32 additions and 0 deletions.
32 changes: 32 additions & 0 deletions tools/lib/bpf/bpf_tracing.h
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,9 @@
#elif defined(__TARGET_ARCH_sparc)
#define bpf_target_sparc
#define bpf_target_defined
#elif defined(__TARGET_ARCH_riscv)
#define bpf_target_riscv
#define bpf_target_defined
#else

/* Fall back to what the compiler says */
Expand All @@ -48,6 +51,9 @@
#elif defined(__sparc__)
#define bpf_target_sparc
#define bpf_target_defined
#elif defined(__riscv) && __riscv_xlen == 64
#define bpf_target_riscv
#define bpf_target_defined
#endif /* no compiler target */

#endif
Expand Down Expand Up @@ -288,6 +294,32 @@ struct pt_regs;
#define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), pc)
#endif

#elif defined(bpf_target_riscv)

struct pt_regs;
#define PT_REGS_RV const volatile struct user_regs_struct
#define PT_REGS_PARM1(x) (((PT_REGS_RV *)(x))->a0)
#define PT_REGS_PARM2(x) (((PT_REGS_RV *)(x))->a1)
#define PT_REGS_PARM3(x) (((PT_REGS_RV *)(x))->a2)
#define PT_REGS_PARM4(x) (((PT_REGS_RV *)(x))->a3)
#define PT_REGS_PARM5(x) (((PT_REGS_RV *)(x))->a4)
#define PT_REGS_RET(x) (((PT_REGS_RV *)(x))->ra)
#define PT_REGS_FP(x) (((PT_REGS_RV *)(x))->s5)
#define PT_REGS_RC(x) (((PT_REGS_RV *)(x))->a5)
#define PT_REGS_SP(x) (((PT_REGS_RV *)(x))->sp)
#define PT_REGS_IP(x) (((PT_REGS_RV *)(x))->epc)

#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), a0)
#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), a1)
#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), a2)
#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), a3)
#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), a4)
#define PT_REGS_RET_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), ra)
#define PT_REGS_FP_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), fp)
#define PT_REGS_RC_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), a5)
#define PT_REGS_SP_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), sp)
#define PT_REGS_IP_CORE(x) BPF_CORE_READ((PT_REGS_RV *)(x), epc)

#endif

#if defined(bpf_target_powerpc)
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