mirror of
https://github.com/RGBCube/serenity
synced 2025-05-16 18:25:06 +00:00
a755b80057
Now that gcc knows about crtbeginS and crtendS, and knows not to link crt0.o into shared objects, we can get rid of the hacks required due to --nostartfiles.
68 lines
2 KiB
C++
68 lines
2 KiB
C++
#include <AK/kstdio.h>
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#include <AK/String.h>
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#include <assert.h>
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#include <stdio.h>
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// FIXME: Things defined in crt0 >:(
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// We need to figure out a better way to get these symbols defined and available
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// Even if we're linking a shared object.
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__thread int errno;
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char* __static_environ[] = { nullptr }; // We don't get the environment without some libc workarounds..
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char** environ = __static_environ;
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bool __environ_is_malloced = false;
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extern unsigned __stack_chk_guard;
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unsigned __stack_chk_guard = (unsigned)0xc0000c13;
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[[noreturn]] void __stack_chk_fail()
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{
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ASSERT_NOT_REACHED();
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}
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// FIXME: Because we need to call printf, and we don't have access to the stout file descriptor
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// from the main executable, we need to create our own copy in __stdio_init :/
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// Same deal for malloc init. We're essentially manually calling __libc_init here.
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extern "C" void __stdio_init();
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extern "C" void __malloc_init();
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class Global {
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public:
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Global(int i)
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: m_i(i)
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{
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__malloc_init();
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__stdio_init();
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}
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int get_i() const { return m_i; }
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private:
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int m_i = 0;
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};
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// This object exists to call __stdio_init and __malloc_init. Also to show that global vars work
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Global g_glob { 5 };
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extern "C" {
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int global_lib_variable = 1234;
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void global_lib_function()
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{
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printf("Hello from Dynamic Lib! g_glob::m_i == %d\n", g_glob.get_i());
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}
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const char* other_lib_function(int my_argument)
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{
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dbgprintf("Hello from Dynamic Lib, now from the debug port! g_glob::m_i == %d\n", g_glob.get_i());
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int sum = my_argument + global_lib_variable;
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// FIXME: We can't just return AK::String::format across the lib boundary here.
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// It will use malloc from our DSO's copy of LibC, and then probably be free'd into
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// the malloc of the main program which would be what they call 'very crash'.
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// Feels very Windows :)
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static String s_string;
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s_string = String::format("Here's your string! Sum of argument and global_lib_variable: %d", sum);
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return s_string.characters();
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}
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}
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