diff options
Diffstat (limited to 'lib/mlibc/sysdeps/keyronex/generic/entry.cpp')
-rw-r--r-- | lib/mlibc/sysdeps/keyronex/generic/entry.cpp | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/lib/mlibc/sysdeps/keyronex/generic/entry.cpp b/lib/mlibc/sysdeps/keyronex/generic/entry.cpp deleted file mode 100644 index ff15c62..0000000 --- a/lib/mlibc/sysdeps/keyronex/generic/entry.cpp +++ /dev/null @@ -1,108 +0,0 @@ -#include <bits/ensure.h> -#include <bits/posix/posix_signal.h> -#include <keyronex/syscall.h> -#include <mlibc/all-sysdeps.hpp> -#include <mlibc/debug.hpp> -#include <mlibc/elf/startup.h> -#include <stdint.h> -#include <stdlib.h> - -// defined by the POSIX library -void __mlibc_initLocale(); - -extern "C" uintptr_t *__dlapi_entrystack(); - -extern char **environ; -static mlibc::exec_stack_data __mlibc_stack_data; - -struct LibraryGuard { - LibraryGuard(); -}; - -static LibraryGuard guard; - -LibraryGuard::LibraryGuard() -{ - __mlibc_initLocale(); - - // Parse the exec() stack. - mlibc::parse_exec_stack(__dlapi_entrystack(), &__mlibc_stack_data); - mlibc::set_startup_data(__mlibc_stack_data.argc, - __mlibc_stack_data.argv, __mlibc_stack_data.envp); -} - -namespace mlibc { -int -sys_sigentry(void *sigentry) -{ - uintptr_t ret = syscall1(kPXSysSigEntry, (uintptr_t)sigentry, NULL); - if (int e = sc_error(ret); e) - return e; - return 0; -} - -[[noreturn]] int -sys_sigreturn(ucontext_t *context) -{ - syscall1(kPXSysSigReturn, (uintptr_t)context, NULL); - __builtin_unreachable(); -} -} - -static void -do_stacktrace(ucontext_t *ctx) -{ - size_t *base_ptr = (size_t *)ctx->uc_mcontext.gregs[REG_RBP]; - - mlibc::infoLogger() << "Stacktrace:" << frg::endlog; - mlibc::infoLogger() << " [" << (void *)ctx->uc_mcontext.gregs[REG_RIP] - << "]" << frg::endlog; - for (;;) { - size_t old_bp = base_ptr[0]; - size_t ret_addr = base_ptr[1]; - if (!ret_addr) - break; - mlibc::infoLogger() - << " [" << (void *)ret_addr << "]" << frg::endlog; - if (!old_bp) - break; - base_ptr = (size_t *)old_bp; - } -} - -static void -__mlibc_sigentry(int which, siginfo_t *siginfo, void *handler, - bool is_sigaction, ucontext_t *ret_context) -{ - if ((uintptr_t)handler == (uintptr_t)SIG_DFL) { - mlibc::infoLogger() - << "mlibc: Unhandled signal " << which << frg::endlog; - do_stacktrace(ret_context); - mlibc::sys_exit(128 + which); - } else if ((uintptr_t)handler == (uintptr_t)SIG_IGN) { - /* epsilon */ - } else { - if (is_sigaction) - ((void (*)(int, siginfo_t *, void *))handler)(which, - siginfo, ret_context); - else - ((void (*)(int))handler)(which); - } - - mlibc::sys_sigreturn(ret_context); - - __builtin_unreachable(); -} - -extern "C" void -__mlibc_entry(int (*main_fn)(int argc, char *argv[], char *env[])) -{ - /* communicate the signal handler entry point to the kernel */ - mlibc::sys_sigentry((void *)__mlibc_sigentry); - - // TODO: call __dlapi_enter, otherwise static builds will break (see - // Linux sysdeps) - auto result = main_fn(__mlibc_stack_data.argc, __mlibc_stack_data.argv, - environ); - exit(result); -} |