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libbpf: Add LoongArch support to bpf_tracing.h

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Add PT_REGS macros for LoongArch ([0]).

  [0]: https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html

Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Huacai Chen <chenhuacai@loongson.cn>
Link: https://lore.kernel.org/bpf/20221231100757.3177034-1-hengqi.chen@gmail.com
This commit is contained in:
Hengqi Chen 2022-12-31 18:07:57 +08:00 committed by Daniel Borkmann
parent bb5747cfbc
commit 00883922ab
1 changed files with 23 additions and 0 deletions
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23
tools/lib/bpf/bpf_tracing.h
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@ -32,6 +32,9 @@
#elif defined(__TARGET_ARCH_arc)
#define bpf_target_arc
#define bpf_target_defined
#elif defined(__TARGET_ARCH_loongarch)
#define bpf_target_loongarch
#define bpf_target_defined
#else
/* Fall back to what the compiler says */
@ -62,6 +65,9 @@
#elif defined(__arc__)
#define bpf_target_arc
#define bpf_target_defined
#elif defined(__loongarch__)
#define bpf_target_loongarch
#define bpf_target_defined
#endif /* no compiler target */
#endif
@ -258,6 +264,23 @@ struct pt_regs___arm64 {
/* arc does not select ARCH_HAS_SYSCALL_WRAPPER. */
#define PT_REGS_SYSCALL_REGS(ctx) ctx
#elif defined(bpf_target_loongarch)
/* https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html */
#define __PT_PARM1_REG regs[4]
#define __PT_PARM2_REG regs[5]
#define __PT_PARM3_REG regs[6]
#define __PT_PARM4_REG regs[7]
#define __PT_PARM5_REG regs[8]
#define __PT_RET_REG regs[1]
#define __PT_FP_REG regs[22]
#define __PT_RC_REG regs[4]
#define __PT_SP_REG regs[3]
#define __PT_IP_REG csr_era
/* loongarch does not select ARCH_HAS_SYSCALL_WRAPPER. */
#define PT_REGS_SYSCALL_REGS(ctx) ctx
#endif
#if defined(bpf_target_defined)