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[/] [or1k/] [tags/] [tn_m001/] [newlib/] [newlib/] [libc/] [sys/] [go32/] [go32func.c] - Rev 1765
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#include <sys/types.h> #include "go32.h" #include "dpmi.h" #include "dos.h" u_short _go32_my_cs() { asm("movw %cs,%ax"); } u_short _go32_my_ds() { asm("movw %ds,%ax"); } u_short _go32_my_ss() { asm("movw %ss,%ax"); } u_short _go32_conventional_mem_selector() { return _go32_info_block.selector_for_linear_memory; } static _go32_dpmi_registers regs; static volatile u_long ctrl_break_count = 0; static int ctrl_break_hooked = 0; static _go32_dpmi_seginfo old_vector; static _go32_dpmi_seginfo new_vector; static ctrl_break_isr(_go32_dpmi_registers *regs) { ctrl_break_count ++; } u_long _go32_was_ctrl_break_hit() { u_long cnt; _go32_want_ctrl_break(1); cnt = ctrl_break_count; ctrl_break_count = 0; return cnt; } void _go32_want_ctrl_break(int yes) { if (yes) { if (ctrl_break_hooked) return; _go32_dpmi_get_real_mode_interrupt_vector(0x1b, &old_vector); new_vector.pm_offset = (int)ctrl_break_isr; _go32_dpmi_allocate_real_mode_callback_iret(&new_vector, ®s); _go32_dpmi_set_real_mode_interrupt_vector(0x1b, &new_vector); ctrl_break_count = 0; ctrl_break_hooked = 1; } else { if (!ctrl_break_hooked) return; _go32_dpmi_set_real_mode_interrupt_vector(0x1b, &old_vector); _go32_dpmi_free_real_mode_callback(&new_vector); ctrl_break_count = 0; ctrl_break_hooked = 0; } }