fxos/shell/m.cpp

#include "parser.h"
#include "shell.h"

//---
// ms
//---

static FxOS::Symbol parse_ms(Session &session, Parser &parser)
{
    FxOS::Symbol s;

    if(parser.lookahead().type == T::SYSCALL) {
        s.type = FxOS::Symbol::Syscall;
        s.value = parser.expect(T::SYSCALL).value.NUM;
    }
    else {
        s.type = FxOS::Symbol::Address;
        s.value = parser.expr(session.current_space);
    }

    s.name = parser.symbol();
    parser.end();

    return s;
}

void _ms(Session &session, Symbol s)
{
    if(!session.current_space)
        return;
    session.current_space->symbols.add(s);
}

static ShellCommand _ms_cmd(
    "ms", [](Session &s, Parser &p) { _ms(s, parse_ms(s, p)); },
    [](Session &s, Parser &p) { parse_ms(s, p); }, "Metadata Symbol", R"(
ms <address|syscall> <symbol>

Defines a new symbol at the specified address or syscall number in the current
virtual space. If a syscall number is provided, the address is not resolved;
the same syscall symbol can be used across multiple OS versions regardless of
where the functions are actually located.
)");