From: Jerry Crunchtime jerry.c.t@web.de
[ Upstream commit 1acf8f90ea7ee59006d0474275922145ac291331 ]
The o32, n32 and n64 calling conventions require the return value to be stored in $v0 which maps to $2 register, i.e., the register 2.
Fixes: c1932cd ("bpf: Add MIPS support to samples/bpf.") Signed-off-by: Jerry Crunchtime jerry.c.t@web.de Signed-off-by: Daniel Borkmann daniel@iogearbox.net Acked-by: Andrii Nakryiko andriin@fb.com Link: https://lore.kernel.org/bpf/43707d31-0210-e8f0-9226-1af140907641@web.de Signed-off-by: Sasha Levin sashal@kernel.org --- tools/lib/bpf/bpf_tracing.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h index 58eceb884df33..eebf020cbe3e9 100644 --- a/tools/lib/bpf/bpf_tracing.h +++ b/tools/lib/bpf/bpf_tracing.h @@ -215,7 +215,7 @@ struct pt_regs; #define PT_REGS_PARM5(x) ((x)->regs[8]) #define PT_REGS_RET(x) ((x)->regs[31]) #define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */ -#define PT_REGS_RC(x) ((x)->regs[1]) +#define PT_REGS_RC(x) ((x)->regs[2]) #define PT_REGS_SP(x) ((x)->regs[29]) #define PT_REGS_IP(x) ((x)->cp0_epc)
@@ -226,7 +226,7 @@ struct pt_regs; #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), regs[8]) #define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), regs[31]) #define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), regs[30]) -#define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), regs[1]) +#define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), regs[2]) #define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), regs[29]) #define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), cp0_epc)