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libbpf: Define i386 syscall regs spec in bpf_tracing.h

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Define explicit table of registers used for syscall argument passing.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230120200914.3008030-15-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko
2023-01-20 12:09:03 -08:00
committed by Andrii Nakryiko
parent df16188dc2
commit b2d8a8d269
1 changed files with 8 additions and 0 deletions
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8
src/bpf_tracing.h
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@@ -115,6 +115,14 @@
#define __PT_PARM1_REG eax #define __PT_PARM1_REG eax
#define __PT_PARM2_REG edx #define __PT_PARM2_REG edx
#define __PT_PARM3_REG ecx #define __PT_PARM3_REG ecx
/* i386 syscall ABI is very different, refer to syscall(2) manpage */
#define __PT_PARM1_SYSCALL_REG ebx
#define __PT_PARM2_SYSCALL_REG ecx
#define __PT_PARM3_SYSCALL_REG edx
#define __PT_PARM4_SYSCALL_REG esi
#define __PT_PARM5_SYSCALL_REG edi
#define __PT_PARM6_SYSCALL_REG ebp
#define __PT_RET_REG esp #define __PT_RET_REG esp
#define __PT_FP_REG ebp #define __PT_FP_REG ebp
#define __PT_RC_REG eax #define __PT_RC_REG eax