86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
#include "shell.h"
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#include "parser.h"
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#include "commands.h"
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#include "errors.h"
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#include <fmt/core.h>
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#include <optional>
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#include <fxos/util/log.h>
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//---
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// e
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//---
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struct _e_args
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{
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std::string binary_name;
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std::vector<long> values;
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};
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static _e_args parse_e(Session &session, Parser &parser)
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{
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_e_args args {};
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parser.option("-b",
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[&args](Parser &p) { args.binary_name = p.symbol("binary_name"); });
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parser.accept_options();
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Binary *binary = session.currentBinary();
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if(!args.binary_name.empty()) {
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binary = session.project().getBinary(args.binary_name);
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if(!binary) {
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std::string msg
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= fmt::format("No binary “{}” in project", args.binary_name);
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if(parser.completing())
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throw Parser::CompletionRequest("_error", msg);
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else
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FxOS_log(ERR, "%s", msg.c_str());
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}
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}
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while(!parser.at_end())
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args.values.push_back(parser.expr(binary));
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parser.end();
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return args;
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}
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void _e(Session &, std::string, std::vector<long> const &values)
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{
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for(long value: values) {
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long print_val = labs(value);
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/* Hexa format */
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int length = (print_val <= (1ll << 32) ? 8 : 16) + 2 + (value < 0);
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std::string format = fmt::format("{{:#0{}x}}", length);
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fmt::print(format, value);
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if(print_val <= 100 || print_val % 100 <= 1 || print_val % 100 >= 99)
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fmt::print(" = {}", print_val);
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fmt::print("\n");
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}
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}
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static ShellCommand _e_cmd(
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"e",
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[](Session &s, Parser &p) {
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auto const &args = parse_e(s, p);
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_e(s, args.binary_name, args.values);
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},
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[](Session &s, Parser &p) { parse_e(s, p); }, "Evaluate expression", R"(
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e [-b <binary>] [<expression>...]
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Evaluates the specified expressions. The expressions may include syscall
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references (%0ab), named symbols (TRA), and arithmetic expressions (within
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parentheses).
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The resulting values undergo a simple analysis which recovers symbol names and
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syscall addresses within the current binary (or the one specified with -b).
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e TRA (Bdisp_PutDisp_DD+2)
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Evaluate the address of the TRA register, and the address of the second
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instruction of Bdisp_PutDisp_DD.
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)");
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