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Add new_flags parameter to protect_addr

This commit is contained in:
8dcc 2023-07-25 18:49:34 +02:00
parent d2d1f55d22
commit 4b7cdc86b9
3 changed files with 6 additions and 5 deletions
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3
src/globals.c
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@ -2,6 +2,7 @@
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <dlfcn.h> #include <dlfcn.h>
#include <sys/mman.h> /* PROT_* */
#include "include/globals.h" #include "include/globals.h"
#include "include/sdk.h" #include "include/sdk.h"
@ -54,7 +55,7 @@ bool globals_init(void) {
return false; return false;
} }
if (!unprotect_addr(i_studiomodelrenderer)) { if (!protect_addr(i_studiomodelrenderer, PROT_READ | PROT_WRITE)) {
printf("hl-cheat: globals_init: couldn't unprotect address of SMR\n"); printf("hl-cheat: globals_init: couldn't unprotect address of SMR\n");
return false; return false;
} }

2
src/include/util.h
View File

@ -35,6 +35,6 @@ float angle_delta_rad(float a, float b);
bool world_to_screen(vec3_t vec, vec2_t screen); bool world_to_screen(vec3_t vec, vec2_t screen);
void gl_drawbox(int x, int y, int w, int h, rgb_t c); void gl_drawbox(int x, int y, int w, int h, rgb_t c);
void gl_drawline(int x0, int y0, int x1, int y1, float w, rgb_t col); void gl_drawline(int x0, int y0, int x1, int y1, float w, rgb_t col);
bool unprotect_addr(void* ptr); bool protect_addr(void* ptr, int new_flags);
#endif /* UTIL_H_ */ #endif /* UTIL_H_ */

6
src/util.c
View File

@ -139,12 +139,12 @@ void gl_drawline(int x0, int y0, int x1, int y1, float w, rgb_t col) {
#define PAGE_ALIGN(x) ((x + PAGE_SIZE - 1) & PAGE_MASK) #define PAGE_ALIGN(x) ((x + PAGE_SIZE - 1) & PAGE_MASK)
#define PAGE_ALIGN_DOWN(x) (PAGE_ALIGN(x) - PAGE_SIZE) #define PAGE_ALIGN_DOWN(x) (PAGE_ALIGN(x) - PAGE_SIZE)
bool unprotect_addr(void* ptr) { bool protect_addr(void* ptr, int new_flags) {
void* p = (void*)PAGE_ALIGN_DOWN((int)ptr); void* p = (void*)PAGE_ALIGN_DOWN((int)ptr);
int pgsz = getpagesize(); int pgsz = getpagesize();
if (mprotect(p, pgsz, PROT_READ | PROT_WRITE) == -1) { if (mprotect(p, pgsz, new_flags) == -1) {
printf("hl-cheat: error unprotecting %p\n", ptr); printf("hl-cheat: error protecting %p\n", ptr);
return false; return false;
} }