33 lines
735 B
NASM
33 lines
735 B
NASM
/* stuff needed for libgcc on win32. */
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#ifdef L_chkstk
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.global ___chkstk
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.global __alloca
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___chkstk:
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__alloca:
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pushl %ecx /* save temp */
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movl %esp,%ecx /* get sp */
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addl $0x8,%ecx /* and point to return addr */
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probe: cmpl $0x1000,%eax /* > 4k ?*/
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jb done
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subl $0x1000,%ecx /* yes, move pointer down 4k*/
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orl $0x0,(%ecx) /* probe there */
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subl $0x1000,%eax /* decrement count */
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jmp probe /* and do it again */
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done: subl %eax,%ecx
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orl $0x0,(%ecx) /* less that 4k, just peek here */
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movl %esp,%eax
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movl %ecx,%esp /* decrement stack */
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movl (%eax),%ecx /* recover saved temp */
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movl 4(%eax),%eax /* get return address */
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jmp *%eax
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#endif
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