From 342b9c5594e85819665af37b55afe27d0731379f Mon Sep 17 00:00:00 2001 From: Paul Chaignon Date: Fri, 13 Oct 2023 10:31:49 +0200 Subject: sys/linux/test: test case for bpf_snprintf helper This commit adds a new test case for the bpf_snprintf description introduced in the previous commit. It corresponds to the BPF code: char str[8] = {0}; u64 data = 0x1234; bpf_snprintf(str, sizeof(str), "%d ", &data, sizeof(data)); exit 0; The fmt (3rd) argument must be stored in a read-only array map which is prepared with the first three syscalls. Once loaded, the program is executed with BPF_PROG_TEST_RUN. Signed-off-by: Paul Chaignon --- sys/linux/test/bpf_helpers | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'sys/linux') diff --git a/sys/linux/test/bpf_helpers b/sys/linux/test/bpf_helpers index 9e65ffc55..2e9287eda 100644 --- a/sys/linux/test/bpf_helpers +++ b/sys/linux/test/bpf_helpers @@ -3,3 +3,13 @@ r1 = bpf$PROG_LOAD(AUTO, &AUTO={0x3, AUTO, &AUTO=@framed={{AUTO, AUTO, AUTO, AUTO, 0x0, AUTO, AUTO, AUTO, 0x0}, [@printk={@integer={AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, 0x1234}, {AUTO, AUTO, AUTO, AUTO}}], {AUTO, AUTO, AUTO, AUTO}}, &AUTO='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, "00000000000000000000000000000000", 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0xa0) r2 = bpf$BPF_PROG_TEST_RUN(AUTO, &AUTO={r1, AUTO, 0x10, 0x10, &AUTO="0000000000000000", &AUTO="0000000000000000", 0x1, AUTO, 0x0, 0x0, 0x0, 0x0, 0x0, AUTO, 0x0}, 0x4c) + +# Prepare, load, and execute a BPF program that calls bpf_snprintf + +r1 = bpf$MAP_CREATE_CONST_STR(AUTO, &AUTO={AUTO, AUTO, AUTO, AUTO, AUTO, 0x0, 0x0, "00000000000000000000000000000000", 0x0, 0x0, 0x0, 0x0, 0x0, AUTO}, 0x48) +r2 = bpf$MAP_UPDATE_CONST_STR(AUTO, &AUTO={{r1, r1}, &AUTO=0x0, &AUTO='%d \x00', AUTO}, 0x1c) +r3 = bpf$BPF_MAP_CONST_STR_FREEZE(AUTO, &AUTO={r1, r1}, 0x4) + +r4 = bpf$PROG_LOAD(AUTO, &AUTO={0x3, AUTO, &AUTO=@framed={{AUTO, AUTO, AUTO, AUTO, 0x0, AUTO, AUTO, AUTO, 0x0}, [@snprintf={{AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, 0x1234}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, r1, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO}}], {AUTO, AUTO, AUTO, AUTO}}, &AUTO='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, "00000000000000000000000000000000", 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0xa0) + +r5 = bpf$BPF_PROG_TEST_RUN(AUTO, &AUTO={r4, AUTO, 0x10, 0x10, &AUTO="0000000000000000", &AUTO="0000000000000000", 0x1, AUTO, 0x0, 0x0, 0x0, 0x0, 0x0, AUTO, 0x0}, 0x4c) -- cgit mrf-deployment