Esempi in C++ (Cpp) per u_execmem_get_writable

Esempio n. 1

File: entry_armv7_tsd.c Progetto: phomes/libglvnd

void entry_get_patch_addresses(mapi_func entry, void **writePtr, const void **execPtr)
{
    // Get the actual beginning of the stub allocation
    void *entryBase = (void *) (((uintptr_t) entry) - 1);
    *execPtr = (const void *) entryBase;
    *writePtr = u_execmem_get_writable(entryBase);
}

Esempio n. 2

File: entry_x86_tls.c Progetto: NVIDIA/libglvnd

void entry_generate_default_code(char *entry, int slot)
{
    char *writeEntry = u_execmem_get_writable(entry);

    memcpy(writeEntry, ENTRY_TEMPLATE, sizeof(ENTRY_TEMPLATE));
    *((uint32_t *) (writeEntry + TEMPLATE_OFFSET_TLS_OFFSET)) = x86_current_tls();
    *((uint32_t *) (writeEntry + TEMPLATE_OFFSET_SLOT)) = (uint32_t) (slot * sizeof(mapi_func));
}

Esempio n. 3

File: entry_x86_64_tsd.c Progetto: NVIDIA/libglvnd

void entry_generate_default_code(char *entry, int slot)
{
    char *writeEntry = u_execmem_get_writable(entry);
    memcpy(writeEntry, ENTRY_TEMPLATE, sizeof(ENTRY_TEMPLATE));

    *((uint32_t *) (writeEntry + TEMPLATE_OFFSET_SLOT)) = slot * sizeof(mapi_func);
    *((uintptr_t *) (writeEntry + TEMPLATE_OFFSET_CURRENT_TABLE)) = (uintptr_t) _glapi_Current;
    *((uintptr_t *) (writeEntry + TEMPLATE_OFFSET_CURRENT_TABLE_GET)) = (uintptr_t) _glapi_get_current;
}

Esempio n. 4

void entry_generate_default_code(char *entry, int slot)
{
    char *writeEntry = u_execmem_get_writable(entry);
    uintptr_t getTableOffset;

    memcpy(writeEntry, ENTRY_TEMPLATE, sizeof(ENTRY_TEMPLATE));

    *((uint32_t *) (writeEntry + TEMPLATE_OFFSET_SLOT1)) = slot * sizeof(mapi_func);
    *((uint32_t *) (writeEntry + TEMPLATE_OFFSET_SLOT2)) = slot * sizeof(mapi_func);
    *((uintptr_t *) (writeEntry + TEMPLATE_OFFSET_CURRENT_TABLE)) = (uintptr_t) _glapi_Current;

    // Calculate the offset to patch for the CALL instruction to
    // _glapi_get_current.
    getTableOffset = (uintptr_t) _glapi_get_current;
    getTableOffset -= (((uintptr_t) entry) + TEMPLATE_OFFSET_CURRENT_TABLE_GET_RELATIVE);
    *((uintptr_t *) (writeEntry + TEMPLATE_OFFSET_CURRENT_TABLE_GET)) = getTableOffset;
}

Esempio n. 5

File: entry_armv7_tsd.c Progetto: phomes/libglvnd

void entry_generate_default_code(char *entry, int slot)
{
    char *writeEntry;

    // Make sure the base address has the Thumb mode bit
    assert((uintptr_t)entry & (uintptr_t)0x1);

    // Get the pointer to the writable mapping.
    writeEntry = (char *) u_execmem_get_writable(entry - 1);

    memcpy(writeEntry, BYTECODE_TEMPLATE, ARMV7_BYTECODE_SIZE);

    *((uint32_t *)(writeEntry + TEMPLATE_OFFSET_SLOT)) = slot;
    *((uint32_t *)(writeEntry + TEMPLATE_OFFSET_CURRENT_TABLE)) =
        (uint32_t)_glapi_Current;
    *((uint32_t *)(writeEntry + TEMPLATE_OFFSET_CURRENT_TABLE_GET)) =
        (uint32_t)_glapi_get_current;

    // See http://community.arm.com/groups/processors/blog/2010/02/17/caches-and-self-modifying-code
    __builtin___clear_cache(writeEntry, writeEntry + ARMV7_BYTECODE_SIZE);
}