mirror of
https://github.com/mpv-player/mpv
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6e9cbdc104
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@29305 b3059339-0415-0410-9bf9-f77b7e298cf2
84 lines
1.5 KiB
ArmAsm
84 lines
1.5 KiB
ArmAsm
.section .data
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.globl caller_return
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caller_return:
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.long 0
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.globl report_entry
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report_entry:
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.long null_call
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.globl report_ret
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report_ret:
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.long null_call
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.global wrapper_target
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wrapper_target:
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.long null_call
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.section .text
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.globl null_call
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.type null_call, @function
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.balign 16,0x90
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null_call:
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ret
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.globl wrapper
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.type wrapper, @function
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.balign 16,0x90
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wrapper:
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pusha # store registers (EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI)
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pushf # store flags
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push %ebp # set up a stack frame
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movl %esp, %ebp
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leal 4(%ebp), %eax # push flags addr
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push %eax
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leal 8(%ebp), %eax # push registers addr
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push %eax
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leal 40(%ebp), %edx
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movl (%ebp), %eax
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subl %edx, %eax
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push %eax
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push %edx
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call *report_entry # report entry
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test %eax, %eax
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jnz .Ldone
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leave # restore %esp, %ebp
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popf # restore flags
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popa # restore registers
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popl caller_return # switch return addresses
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pushl $.Lwrapper_return
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jmp *wrapper_target # wrapper_target should return at .Lwrapper_return
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.balign 16, 0x90
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.Lwrapper_return:
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pushl caller_return # restore the original return address
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pusha # more for reference sake here
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pushf
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push %ebp # set up a stack frame
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movl %esp, %ebp
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leal 4(%ebp), %eax # push flags addr
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push %eax
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leal 8(%ebp), %eax # push registers addr
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push %eax
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leal 40(%ebp), %edx # push stack top address (relative to our entry)
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movl (%ebp), %eax
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subl %edx, %eax # calculate difference between entry and previous frame
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push %eax
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push %edx
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call *report_ret # report the return information (same args)
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.Ldone:
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leave
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popf
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popa
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ret
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