77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
#include <elf.h>
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#include <vector>
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#include <X11/Xlib.h>
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#include <libreborn/libreborn.h>
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#include <libreborn/media-layer/core.h>
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#ifndef MEDIA_LAYER_PROXY_SERVER
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// Store Adresses That Are Part Of MCPI
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struct text_section_data {
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void *section;
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Elf32_Word size;
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};
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static std::vector<text_section_data> &get_text_sections() {
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static std::vector<text_section_data> sections;
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return sections;
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}
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static void text_section_callback(void *section, Elf32_Word size, __attribute__((unused)) void *data) {
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text_section_data section_data;
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section_data.section = section;
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section_data.size = size;
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get_text_sections().push_back(section_data);
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}
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// Check If The Current Return Address Is Part Of MCPI Or An External Library
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static inline int _is_returning_to_external_library(void *return_addr) {
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// Load Text Sections If Not Loaded
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if (get_text_sections().size() < 1) {
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iterate_text_sections(text_section_callback, NULL);
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}
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// Iterate Text Sections
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for (std::vector<text_section_data>::size_type i = 0; i < get_text_sections().size(); i++) {
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text_section_data section_data = get_text_sections()[i];
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// Check Text Section
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if (return_addr >= section_data.section && return_addr < (((unsigned char *) section_data.section) + section_data.size)) {
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// Part Of MCPI
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return 0;
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}
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}
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// Part Of An External Library
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return 1;
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}
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#define is_returning_to_external_library() _is_returning_to_external_library(__builtin_extract_return_addr(__builtin_return_address(0)))
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#else
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// When Using The Media Layer Proxy, None Of These Functions Are Ever Called By An External Library
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#define is_returning_to_external_library() 0
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#endif
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// Don't Directly Use XLib Unless Returning To An External library
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HOOK(XTranslateCoordinates, int, (void *display, XID src_w, XID dest_w, int src_x, int src_y, int *dest_x_return, int *dest_y_return, XID *child_return)) {
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if (is_returning_to_external_library()) {
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// Use Real Function
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ensure_XTranslateCoordinates();
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return (*real_XTranslateCoordinates)(display, src_w, dest_w, src_x, src_y, dest_x_return, dest_y_return, child_return);
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} else {
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// Use MCPI Replacemnt Function
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*dest_x_return = src_x;
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*dest_y_return = src_y;
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return 1;
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}
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}
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HOOK(XGetWindowAttributes, int, (void *display, XID w, XWindowAttributes *window_attributes_return)) {
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if (is_returning_to_external_library()) {
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// Use Real Function
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ensure_XGetWindowAttributes();
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return (*real_XGetWindowAttributes)(display, w, window_attributes_return);
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} else {
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// Use MCPI Replacemnt Function
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XWindowAttributes attributes;
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attributes.x = 0;
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attributes.y = 0;
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media_get_framebuffer_size(&attributes.width, &attributes.height);
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*window_attributes_return = attributes;
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return 1;
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}
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}
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