aboutsummaryrefslogtreecommitdiff
path: root/lib/mlibc/sysdeps/keyronex/generic/entry.cpp
diff options
context:
space:
mode:
authorIan Moffett <ian@osmora.org>2024-03-07 17:28:52 -0500
committerIan Moffett <ian@osmora.org>2024-03-07 18:24:51 -0500
commitf5e48e94a2f4d4bbd6e5628c7f2afafc6dbcc459 (patch)
tree93b156621dc0303816b37f60ba88051b702d92f6 /lib/mlibc/sysdeps/keyronex/generic/entry.cpp
parentbd5969fc876a10b18613302db7087ef3c40f18e1 (diff)
build: Build mlibc + add distclean target
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'lib/mlibc/sysdeps/keyronex/generic/entry.cpp')
-rw-r--r--lib/mlibc/sysdeps/keyronex/generic/entry.cpp108
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);
-}