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9 commits

Author SHA1 Message Date
Itamar
e207de8449 LibELF: Add find_demangled_function
Also, added AK::String::index_of and fixed a bug in ELF::Loader::symbol_ptr
2020-04-13 23:20:59 +02:00
Itamar
479348c9e7 Debugger: Add pledges 2020-04-13 00:53:22 +02:00
Itamar
3e9a7175d1 Debugger: Add DebugSession
The DebugSession class wraps the usage of Ptrace.
It is intended to be used by cli & gui debugger programs.

Also, call objdump for disassemly
2020-04-13 00:53:22 +02:00
Itamar
9e51e295cf ptrace: Add PT_SETREGS
PT_SETTREGS sets the regsiters of the traced thread. It can only be
used when the tracee is stopped.

Also, refactor ptrace.
The implementation was getting long and cluttered the alraedy large
Process.cpp file.

This commit moves the bulk of the implementation to Kernel/Ptrace.cpp,
and factors out peek & poke to separate methods of the Process class.
2020-04-13 00:53:22 +02:00
Itamar
0431712660 ptrace: Stop a traced thread when it exists from execve
This was a missing feature in the PT_TRACEME command.

This feature allows the tracer to interact with the tracee before the
tracee has started executing its program.

It will be useful for automatically inserting a breakpoint at a
debugged program's entry point.
2020-04-13 00:53:22 +02:00
Itamar
b306ac9b2b ptrace: Add PT_POKE
PT_POKE writes a single word to the tracee's address space.

Some caveats:
- If the user requests to write to an address in a read-only region, we
temporarily change the page's protections to allow it.

- If the user requests to write to a region that's backed by a
SharedInodeVMObject, we replace the vmobject with a PrivateIndoeVMObject.
2020-04-13 00:53:22 +02:00
Itamar
924fda19b0 Debugger: Get entry point of debugged process
Also, start debugging only after execve is done
2020-04-13 00:53:22 +02:00
Itamar
984ff93406 ptrace: Add PT_PEEK
PT_PEEK reads a single word from the tracee's address space and returns
it to the tracer.
2020-04-13 00:53:22 +02:00
Itamar
77f671b462 CPU: Handle breakpoint trap
Also, start working on the debugger app.
2020-04-13 00:53:22 +02:00