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authorAndrii Nakryiko <andrii@kernel.org>2023-01-20 23:08:54 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2023-01-23 22:52:59 +0300
commit2eb2be30b8dac137d9a21c6125a68993b9dc8a00 (patch)
tree339a38d46b1bad0d53f28b216b2b1dc42c1f6641 /tools
parent1222445a5bf622b37a9bb16c7ad0148e2a21eb0d (diff)
downloadlinux-2eb2be30b8dac137d9a21c6125a68993b9dc8a00.tar.xz
libbpf: Complete powerpc spec in bpf_tracing.h
Add definitions of PARM6 through PARM8 for powerpc architecture. Add also a link to a functiona call sequence documentation for future reference. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20230120200914.3008030-6-andrii@kernel.org
Diffstat (limited to 'tools')
-rw-r--r--tools/lib/bpf/bpf_tracing.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h
index f356955b059a..1b9447f847b0 100644
--- a/tools/lib/bpf/bpf_tracing.h
+++ b/tools/lib/bpf/bpf_tracing.h
@@ -222,11 +222,19 @@ struct pt_regs___arm64 {
#elif defined(bpf_target_powerpc)
+/*
+ * http://refspecs.linux-foundation.org/elf/elfspec_ppc.pdf (page 3-14,
+ * section "Function Calling Sequence")
+ */
+
#define __PT_PARM1_REG gpr[3]
#define __PT_PARM2_REG gpr[4]
#define __PT_PARM3_REG gpr[5]
#define __PT_PARM4_REG gpr[6]
#define __PT_PARM5_REG gpr[7]
+#define __PT_PARM6_REG gpr[8]
+#define __PT_PARM7_REG gpr[9]
+#define __PT_PARM8_REG gpr[10]
#define __PT_RET_REG regs[31]
#define __PT_FP_REG __unsupported__
#define __PT_RC_REG gpr[3]