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Userland: Use /proc/kernel_base to determine the kernel base address
This removes all the hard-coded kernel base addresses from userspace tools. One downside for this is that e.g. Profiler no longer uses a different color for kernel symbols when run as a non-root user.
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6115258a5c
commit
60d6137e73
9 changed files with 63 additions and 48 deletions
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@ -16,6 +16,7 @@
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#include <AK/RefPtr.h>
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#include <LibCore/File.h>
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#include <LibELF/Image.h>
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#include <LibSymbolication/Symbolication.h>
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#include <sys/stat.h>
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namespace Profiler {
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@ -301,12 +302,7 @@ Result<NonnullOwnPtr<Profile>, String> Profile::load_from_perfcore_file(const St
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continue;
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}
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// FIXME: Use /proc for this
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#if ARCH(I386)
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FlatPtr kernel_base = 0xc0000000;
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#else
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FlatPtr kernel_base = 0x2000000000;
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#endif
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auto maybe_kernel_base = Symbolication::kernel_base();
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auto* stack = perf_event.get_ptr("stack");
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VERIFY(stack);
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@ -318,7 +314,7 @@ Result<NonnullOwnPtr<Profile>, String> Profile::load_from_perfcore_file(const St
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FlyString object_name;
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String symbol;
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if (ptr >= kernel_base) {
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if (maybe_kernel_base.has_value() && ptr >= maybe_kernel_base.value()) {
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if (kernel_elf) {
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symbol = kernel_elf->symbolicate(ptr, &offset);
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} else {
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@ -345,7 +341,7 @@ Result<NonnullOwnPtr<Profile>, String> Profile::load_from_perfcore_file(const St
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continue;
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FlatPtr innermost_frame_address = event.frames.at(1).address;
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event.in_kernel = innermost_frame_address >= kernel_base;
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event.in_kernel = maybe_kernel_base.has_value() && innermost_frame_address >= maybe_kernel_base.value();
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events.append(move(event));
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}
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