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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
This commit is contained in:
Andrii Nakryiko 2023-01-20 12:08:54 -08:00 committed by Daniel Borkmann
parent 1222445a5b
commit 2eb2be30b8
1 changed files with 8 additions and 0 deletions
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8
tools/lib/bpf/bpf_tracing.h
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@ -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]