HPB_bot2_i486.so, HPBot2 ver 0.5 release 106 Options

[bir3yk]

I compiled a linux RCBot2 0.5

1. Folder Structure :
.../hl2
.../orangebox <-- srcds_run is here (for TF2 and Orange-Box games)
.../orangebox/bin <-- HPB_bot2_i486.so files copied here
.../rcbot2/
.../rcbot2/config/
.../rcbot2/profiles/
.../rcbot2/waypoints/
.../rcbot2/waypoints/orangebox/tf/ <-- waypoint and scripts files copied here
.../steam
2. Edit .../rcbot2/config/bot_mods.ini
mod = TF2
steamdir = orangebox
gamedir = tf
bot = TF2
3. Add
./srcds_run ..............+plugin_load ../bin/HPB_bot2


146 SVN revisions 119 SVN revisions
RCbot2 0.52
121 SVN revisions 121 SVN revisions
RCbot2 0.53
122 SVN revisions 122 SVN revisions

124 SVN revisions 124 SVN revisions

126 SVN revisions 126 SVN revisions

146 SVN revisions 146 SVN revisions

[Cheeseh]

have a look at sourcemod to see if its the same

CODE

    void Protect(void *addr, size_t length, int prot)
    {
# if defined PLATFORM_WINDOWS
        DWORD ignore;
        VirtualProtect(addr, length, prot, &ignore);
# else
        uintptr_t startPage = AddrToPage(uintptr_t(addr));
        length += (uintptr_t(addr) - startPage);
        mprotect((void*)startPage, length, prot);
# endif
    }

    static inline uintptr_t AddrToPage(uintptr_t address)
    {
        return (address & ~(uintptr_t(sysconf(_SC_PAGE_SIZE) - 1)));
    }

[Ted]

have a look at sourcemod to see if its the same

CODE

    void Protect(void *addr, size_t length, int prot)
    {
# if defined PLATFORM_WINDOWS
        DWORD ignore;
        VirtualProtect(addr, length, prot, &ignore);
# else
        uintptr_t startPage = AddrToPage(uintptr_t(addr));
        length += (uintptr_t(addr) - startPage);
        mprotect((void*)startPage, length, prot);
# endif
    }

    static inline uintptr_t AddrToPage(uintptr_t address)
    {
        return (address & ~(uintptr_t(sysconf(_SC_PAGE_SIZE) - 1)));
    }

I believe that does the same as what I posted. An address is page aligned if it is a multiple of the page size. Mprotect will throw an EINVAL if a none-page aligned address is given as the input. To page align the address you want to supply mprotect, you decrease the address by the address modulus page size: addr - (addr % page_size).
The snippet from SourceMod uses a bit operator trick to get the same result. For example:

CODE

address    = 6             = 0110
page_size = 4             = 0100

page_size - 1 = 3         = 0011
~(page_size - 1)         = 1100
address & ~(page_size -1) = 4     = 0100
6 - 6 % 4 = 4            = 0100

I believe the reason that they chose this (if I remember correctly from my assembler class) method is that it's an optimized way of getting this calculation because modulus requires more CPU cycles to perform. But the result of this optimization will probably be not noticeable for your case as the calculation is done at most 31 times per game.