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generate IR partly

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varun-r-mallya
2025-10-25 04:40:58 +05:30
parent c6b5ecb47e
commit 028d9c2c08
3 changed files with 46 additions and 4 deletions
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16
tests/c-form/struct_field_tests.bpf.c
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@ -21,7 +21,21 @@ int handle_setuid_entry(struct trace_event_raw_sys_enter *ctx) {
// Access each argument separately with clear variable assignments
long int arg0 = ctx->id;
bpf_printk("args[0]: %d", arg0);
/*
* the IR to aim for is
* %2 = alloca ptr, align 8
* store ptr %0, ptr %2, align 8
* Above, %0 is the arg pointer
* %5 = load ptr, ptr %2, align 8
* %6 = getelementptr inbounds %struct.trace_event_raw_sys_enter, ptr %5, i32 0, i32 2
* %7 = load i64, ptr @"llvm.trace_event_raw_sys_enter:0:16$0:2:0", align 8
* %8 = bitcast ptr %5 to ptr
* %9 = getelementptr i8, ptr %8, i64 %7
* %10 = bitcast ptr %9 to ptr
* %11 = call ptr @llvm.bpf.passthrough.p0.p0(i32 0, ptr %10)
* %12 = load i64, ptr %11, align 8, !dbg !101
*
*/
return 0;
}