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Getting closer to Hello world running The current problem is two open descriptors for /dev/mach, which results in malfunctions in pthread initialization, which results in a crash when it tries to print out the error while libc is not inited yet
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src/kernel/CMakeLists.txt
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src/kernel/CMakeLists.txt
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add_subdirectory(emulation/linux)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse -msse2 -msse3 -w -fblocks -ggdb")
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__DARWIN_UNIX03 -fPIC -w -nostdinc -Wl,-undefined,suppress -Wl,-flat_namespace")
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# Why -bind_at_load is necessary:
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# I couldn't find something like -Bsymbolic in Apple's ld
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# -> internal functions are being resolved by dyld
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# -> dyld places stubs -> stubs go into dyld_stub_binder at first use
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# -> there is a temporary loss of 16-byte stack alignment in __darling_bsd_syscall
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# -> dyld_stub_binder checks for this and bails out with a SIGSEGV
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__DARWIN_UNIX03 -fPIC -w -nostdinc -Wl,-bind_at_load -Wl,-undefined,suppress -Wl,-flat_namespace")
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set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -nostdlib")
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include_directories(${DARLING_TOP_DIRECTORY}/kernel-include)
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src/libsystem/init.c
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src/libsystem/init.c
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* libsyscall_initializer() initializes all of libSystem.dylib <rdar://problem/4892197>
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*/
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static __attribute__((constructor))
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void libSystem_initializer(int argc, const char* argv[], const char* envp[] /*, const char* apple[], const struct ProgramVars* vars*/)
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void libSystem_initializer(int argc, const char* argv[], const char* envp[] , const char* apple[], const struct ProgramVars* vars)
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{
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static const struct _libkernel_functions libkernel_funcs = {
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.version = 1,
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.realloc = realloc,
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._pthread_exit_if_canceled = _pthread_exit_if_canceled,
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};
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_darling_initialize_commpage();
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int* x_argc;
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char*** x_argv;
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char*** x_envp;
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char** apple = { NULL };
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struct ProgramVars vars;
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/* Early initialization - original Apple code assumes pthread_init() doesn't print errors */
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/*__darling_get_args(&x_argc, &x_argv, &x_envp, &vars);
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if (!*x_argc)
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{
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char* excl;
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// Darling libdyld is not being used
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// to execute a Mach-O binary.
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// Use what the ELF loader gave us.
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*x_argc = argc - 1;
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*x_argv = argv + 1;
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*x_envp = envp;
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excl = strchr(argv[1], '!');
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if (excl != NULL)
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argv[1] = excl+1;
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vars.NXArgcPtr = x_argc;
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vars.NXArgvPtr = x_argv;
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vars.environPtr = x_envp;
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vars.__prognamePtr = &(*x_argv)[0];
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vars.mh = NULL;
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__darling_set_environ(envp); // Initialize glibc's environ
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}
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__darling_set_libc_vars(x_argc, x_argv, x_envp);*/
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/* cerror() calls require working pthread_self() */
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char dummy_self[4096];
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memset(dummy_self, 0, sizeof(dummy_self));
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__pthread_set_self(dummy_self);
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_darling_initialize_commpage();
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__libkernel_init(&libkernel_funcs, *envp, apple, &vars);
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bootstrap_init();