3a029e1f3d
struct pt_regs is not exported to userspace on all archs. arm64 and s390
export "user_pt_regs" instead, which causes build failure at the moment:
progs/test_task_pt_regs.c:8:16: error: variable has incomplete type 'struct pt_regs'
struct pt_regs current_regs = {};
Instead of using pt_regs from ptrace.h, use the larger kernel struct
from vmlinux.h directly. Since the test runner task_pt_regs.c does not
have access to the kernel struct definition, copy it into a char array.
Fixes: 576d47bb1a ("bpf: selftests: Add bpf_task_pt_regs() selftest")
Suggested-by: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/bpf/20210906163635.302307-1-jean-philippe@linaro.org
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include <test_progs.h>
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#include "test_task_pt_regs.skel.h"
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void test_task_pt_regs(void)
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{
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struct test_task_pt_regs *skel;
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struct bpf_link *uprobe_link;
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size_t uprobe_offset;
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ssize_t base_addr;
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bool match;
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base_addr = get_base_addr();
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if (!ASSERT_GT(base_addr, 0, "get_base_addr"))
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return;
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uprobe_offset = get_uprobe_offset(&get_base_addr, base_addr);
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skel = test_task_pt_regs__open_and_load();
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if (!ASSERT_OK_PTR(skel, "skel_open"))
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return;
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if (!ASSERT_OK_PTR(skel->bss, "check_bss"))
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goto cleanup;
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uprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uprobe,
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false /* retprobe */,
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0 /* self pid */,
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"/proc/self/exe",
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uprobe_offset);
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if (!ASSERT_OK_PTR(uprobe_link, "attach_uprobe"))
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goto cleanup;
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skel->links.handle_uprobe = uprobe_link;
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/* trigger & validate uprobe */
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get_base_addr();
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if (!ASSERT_EQ(skel->bss->uprobe_res, 1, "check_uprobe_res"))
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goto cleanup;
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match = !memcmp(&skel->bss->current_regs, &skel->bss->ctx_regs,
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sizeof(skel->bss->current_regs));
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ASSERT_TRUE(match, "check_regs_match");
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cleanup:
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test_task_pt_regs__destroy(skel);
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}
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