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Update bpf examples and remove function pass code

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varun-r-mallya
2025-09-04 10:33:43 +05:30
parent 9b4ef23a62
commit ba3030a694
4 changed files with 7 additions and 52 deletions
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2
examples/c-form/Makefile
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@ -10,7 +10,7 @@ OBJECT := example.bpf.o
all: $(OUT) all: $(OUT)
object: $(SRC) object: $(SRC)
$(BPF_CLANG) $(CFLAGS) $< -o $(OBJECT) $(BPF_CLANG) -O2 -target bpf -c $< -o $(OBJECT)
$(OUT): $(SRC) object $(OUT): $(SRC) object
$(BPF_CLANG) $(CFLAGS) -S $< -o $@ $(BPF_CLANG) $(CFLAGS) -S $< -o $@

25
examples/c-form/example.bpf.c
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@ -2,31 +2,16 @@
#include <bpf/bpf_helpers.h> #include <bpf/bpf_helpers.h>
#include <stdint.h> #include <stdint.h>
int trace_testing(void *ctx) void test_function() {
{ bpf_printk("test_function called");
bpf_printk("THISISACONSTANT");
bpf_printk("THISISCONSTANT2");
uint64_t a = 69;
bpf_printk("%d", a);
return 0;
} }
SEC("tracepoint/syscalls/sys_enter_execve") SEC("tracepoint/syscalls/sys_enter_execve")
int trace_execve(void *ctx) int trace_execve(void *ctx)
{ {
if(ctx){ bpf_printk("execve called");
trace_testing(ctx); bpf_printk("execve2 called");
} else { test_function();
bpf_printk("THISISANOTHERCONSTANT");
}
bpf_trace_printk("execve called\n", 15);
return 0;
}
SEC("tracepoint/syscalls/sys_exit_execve")
int trace_randomname_exit(void *ctx)
{
bpf_trace_printk("execve called to exit\n", 15);
return 0; return 0;
} }

3
examples/execve.py
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@ -1,12 +1,10 @@
from pythonbpf.decorators import section from pythonbpf.decorators import section
# from pythonbpf.decorators import tracepoint, syscalls
from ctypes import c_void_p, c_int32 from ctypes import c_void_p, c_int32
#This is a test function #This is a test function
def test_function(): def test_function():
print("test_function called") print("test_function called")
# @tracepoint(syscalls.sys_enter_execve)
@section("tracepoint/syscalls/sys_enter_execve") @section("tracepoint/syscalls/sys_enter_execve")
def trace_execve(ctx: c_void_p) -> c_int32: def trace_execve(ctx: c_void_p) -> c_int32:
print("execve called") print("execve called")
@ -14,5 +12,4 @@ def trace_execve(ctx: c_void_p) -> c_int32:
test_function() test_function()
return c_int32(0) return c_int32(0)
LICENSE = "GPL" LICENSE = "GPL"

29
pythonbpf/functions_pass.py
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@ -1,32 +1,5 @@
from llvmlite import ir from llvmlite import ir
import ast import ast
def emit_function(module: ir.Module, license_str: str):
license_bytes = license_str.encode("utf8") + b"\x00"
elems = [ir.Constant(ir.IntType(8), b) for b in license_bytes]
ty = ir.ArrayType(ir.IntType(8), len(elems))
gvar = ir.GlobalVariable(module, ty, name="LICENSE")
gvar.initializer = ir.Constant(ty, elems) # type: ignore
gvar.align = 1 # type: ignore
gvar.linkage = "dso_local" # type: ignore
gvar.global_constant = False
gvar.section = "license" # type: ignore
return gvar
def functions_processing(tree, module): def functions_processing(tree, module):
bpf_functions = [] pass
helper_functions = []
for node in tree.body:
section_name = ""
if isinstance(node, ast.FunctionDef):
if len(node.decorator_list) == 1:
bpf_functions.append(node)
else:
if 'helper_functions' not in locals():
helper_functions.append(node)