[Projects] [nolimips: 124] Limit access to callee-save and caller-save registers.

Index: ChangeLog from Benoît Perrot &lt;benoit(a)lrde.epita.fr&gt; Limit access to callee-save and caller-save registers. * dev/inst-solver-gen.py: Check use of callee-save and caller-save registers. * src/inst/inst-tasks.hh, src/inst/inst-tasks.cc: Add coresponding tasks. 2004-09-19 Benoît Perrot &lt;benoit(a)lrde.epita.fr&gt; Index: src/inst/inst-tasks.cc --- src/inst/inst-tasks.cc (revision 123) +++ src/inst/inst-tasks.cc (revision 124) @@ -39,6 +39,8 @@ prg_solve () { inst::ProgramSolver program_solver; + program_solver.set_max_callee_save(max_callee_save); + program_solver.set_max_caller_save(max_caller_save); program_solver.solve(* parse::tasks::program); if (exit_status != exit_success) exit (exit_status); Index: src/inst/inst-tasks.hh --- src/inst/inst-tasks.hh (revision 123) +++ src/inst/inst-tasks.hh (revision 124) @@ -37,6 +37,14 @@ "Resolve jump offsets and check bounds of immediates", prg_solve, "parse"); + INT_TASK_DECLARE ("callee-save", + "Set max number of callee-save registers", + max_callee_save, 8, 0, 8, + ""); + INT_TASK_DECLARE ("caller-save", + "Set max number of caller-save registers", + max_caller_save, 10, 0, 10, + ""); } // namespace tasks } // namespace inst Index: dev/inst-solver-gen.py --- dev/inst-solver-gen.py (revision 123) +++ dev/inst-solver-gen.py (revision 124) @@ -59,10 +59,24 @@ protected ExpVisitor { public: + ProgramSolver(): + program_(0), + max_callee_save_(8), max_caller_save_(10) + {} virtual ~ProgramSolver() {} public: + void set_max_callee_save(int max_callee_save) + { + max_callee_save_ = max_callee_save; + } + void set_max_caller_save(int max_caller_save) + { + max_caller_save_ = max_caller_save; + } + + public: void solve(Program &program) { program_ = &program; @@ -98,6 +112,9 @@ print """ protected: Program *program_; + + int max_callee_save_; + int max_caller_save_; }; } // namespace inst @@ -116,6 +133,7 @@ print license print """#include \"inst/program_solver.hh\" +#include \"vm/cpu.hh\" namespace inst { @@ -168,7 +186,6 @@ } } - void ProgramSolver::solve_cpu_register(Register &reg) const { @@ -176,8 +193,21 @@ { case Register::generic: reg.set_kind(Register::general); - break; case Register::general: + if ((reg.get_index() == vm::Cpu::t9 && max_caller_save_ < 10) + || (reg.get_index() == vm::Cpu::t8 && max_caller_save_ < 9) + || (vm::Cpu::t0 + max_caller_save_ - 1 < reg.get_index() + && reg.get_index() <= vm::Cpu::t7)) + { + std::cerr << \"Caller-save register limited.\" << std::endl; + exit_set(exit_solve); + } + else if (vm::Cpu::s0 + max_callee_save_ - 1 < reg.get_index() && + reg.get_index() <= vm::Cpu::s7) + { + std::cerr << \"Callee-save register limited.\" << std::endl; + exit_set(exit_solve); + } break; case Register::unlimited: if (!parse::unlimited_regs_p)