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Kernel: Fail a bit more gracefully when we don't have userspace symbols.

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This commit is contained in:
Andreas Kling 2019-05-18 14:48:53 +02:00
parent a4e48dce77
commit 316fb624f7
3 changed files with 5 additions and 3 deletions
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2
Kernel/ELF/ELFImage.h
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@ -86,7 +86,7 @@ public:
unsigned offset() const { return m_section_header.sh_offset; } unsigned offset() const { return m_section_header.sh_offset; }
unsigned size() const { return m_section_header.sh_size; } unsigned size() const { return m_section_header.sh_size; }
unsigned entry_size() const { return m_section_header.sh_entsize; } unsigned entry_size() const { return m_section_header.sh_entsize; }
unsigned entry_count() const { return size() / entry_size(); } unsigned entry_count() const { return !entry_size() ? 0 : size() / entry_size(); }
dword address() const { return m_section_header.sh_addr; } dword address() const { return m_section_header.sh_addr; }
const char* raw_data() const { return m_image.raw_data(m_section_header.sh_offset); } const char* raw_data() const { return m_image.raw_data(m_section_header.sh_offset); }
bool is_undefined() const { return m_section_index == SHN_UNDEF; } bool is_undefined() const { return m_section_index == SHN_UNDEF; }

2
Kernel/ELF/ELFLoader.h
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@ -18,6 +18,8 @@ public:
char* symbol_ptr(const char* name); char* symbol_ptr(const char* name);
LinearAddress entry() const { return m_image.entry(); } LinearAddress entry() const { return m_image.entry(); }
bool has_symbols() const { return m_image.symbol_count(); }
String symbolicate(dword address) const; String symbolicate(dword address) const;
private: private:

4
Kernel/KSyms.cpp
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@ -115,10 +115,10 @@ static void load_ksyms_from_data(const ByteBuffer& buffer)
if (!symbol.address) if (!symbol.address)
break; break;
if (!symbol.ksym) { if (!symbol.ksym) {
if (current->process().elf_loader()) { if (current->process().elf_loader() && current->process().elf_loader()->has_symbols()) {
dbgprintf("%p %s\n", symbol.address, current->process().elf_loader()->symbolicate(symbol.address).characters()); dbgprintf("%p %s\n", symbol.address, current->process().elf_loader()->symbolicate(symbol.address).characters());
} else { } else {
dbgprintf("%p (no ELF loader for process)\n", symbol.address); dbgprintf("%p (no ELF symbols for process)\n", symbol.address);
} }
continue; continue;
} }