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libbpf: Fix arm and arm64 specs in bpf_tracing.h

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Remove invalid support for PARM5 on 32-bit arm, as per ABI. Add three
more argument registers for arm64. Also leave links to ABI specs for
future reference.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Alan Maguire <alan.maguire@oracle.com> # arm64
Link: https://lore.kernel.org/bpf/20230120200914.3008030-4-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko 2023-01-20 12:08:52 -08:00 committed by Daniel Borkmann
parent 013290329a
commit 1dac40ac87
1 changed files with 11 additions and 1 deletions
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12
tools/lib/bpf/bpf_tracing.h
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@ -157,11 +157,14 @@ struct pt_regs___s390 {
#elif defined(bpf_target_arm)
/*
* https://github.com/ARM-software/abi-aa/blob/main/aapcs32/aapcs32.rst#machine-registers
*/
#define __PT_PARM1_REG uregs[0]
#define __PT_PARM2_REG uregs[1]
#define __PT_PARM3_REG uregs[2]
#define __PT_PARM4_REG uregs[3]
#define __PT_PARM5_REG uregs[4]
#define __PT_RET_REG uregs[14]
#define __PT_FP_REG uregs[11] /* Works only with CONFIG_FRAME_POINTER */
#define __PT_RC_REG uregs[0]
@ -170,6 +173,10 @@ struct pt_regs___s390 {
#elif defined(bpf_target_arm64)
/*
* https://github.com/ARM-software/abi-aa/blob/main/aapcs64/aapcs64.rst#machine-registers
*/
struct pt_regs___arm64 {
unsigned long orig_x0;
};
@ -181,6 +188,9 @@ struct pt_regs___arm64 {
#define __PT_PARM3_REG regs[2]
#define __PT_PARM4_REG regs[3]
#define __PT_PARM5_REG regs[4]
#define __PT_PARM6_REG regs[5]
#define __PT_PARM7_REG regs[6]
#define __PT_PARM8_REG regs[7]
#define __PT_RET_REG regs[30]
#define __PT_FP_REG regs[29] /* Works only with CONFIG_FRAME_POINTER */
#define __PT_RC_REG regs[0]