Update of /cvsroot/mplayer/main/loader/qtx/debug In directory mplayer:/var/tmp.root/cvs-serv32721 Added Files: wrapper.S wrapper.h Log Message: lowlevel function call wrapper by Dylan Perry <dylanp@tekniche.com.au> --- NEW FILE --- .section .data .globl caller_return caller_return: .long 0 .globl report_entry report_entry: .long null_call .globl report_ret report_ret: .long null_call .global wrapper_target wrapper_target: .long null_call .section .text .globl null_call .type null_call, @function .align 16,0x90 null_call: ret .globl wrapper .type wrapper, @function .align 16,0x90 wrapper: pusha # store registers (EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI) pushf # store flags push %ebp # set up a stack frame movl %esp, %ebp leal 4(%ebp), %eax # push flags addr push %eax leal 8(%ebp), %eax # push registers addr push %eax leal 40(%ebp), %edx movl (%ebp), %eax subl %edx, %eax push %eax push %edx call *report_entry # report entry leave # restore %esp, %ebp popf # restore flags popa # restore registers popl caller_return # switch return addresses pushl $.Lwrapper_return jmp *wrapper_target # wrapper_target should return at .Lwrapper_return .align 16, 0x90 .Lwrapper_return: pushl caller_return # restore the original return address pusha # more for reference sake here pushf push %ebp # set up a stack frame movl %esp, %ebp leal 4(%ebp), %eax # push flags addr push %eax leal 8(%ebp), %eax # push registers addr push %eax leal 40(%ebp), %edx # push stack top address (relative to our entry) movl (%ebp), %eax subl %edx, %eax # calculate difference between entry and previous frame push %eax push %edx call *report_ret # report the return information (same args) leave popf popa ret --- NEW FILE --- #ifndef _WRAPPER_H #define _WRAPPER_H #include <sys/types.h> typedef struct { u_int32_t edi, esi, ebp, esp, ebx, edx, ecx, eax; } reg386_t; typedef void (*wrapper_func_t)(void *stack_base, int stack_size, reg386_t *reg, u_int32_t *flags); extern wrapper_func_t report_entry, report_ret; extern void (*wrapper_target)(void); extern int wrapper(void); #endif /* _WRAPPER_H */