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0affa5be19
Hardware stack protection is required by most distributions. See https://wiki.gentoo.org/wiki/Project:Hardened/GNU_stack_quickstart
33 lines
668 B
ArmAsm
33 lines
668 B
ArmAsm
/*
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* Based on code written by J.T. Conklin <jtc@NetBSD.org>.
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* Public domain.
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*/
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#include <i387/bsd_asm.h>
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//__FBSDID("$FreeBSD: src/lib/msun/i387/s_trunc.S,v 1.3 2011/01/07 16:13:12 kib Exp $")
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ENTRY(trunc)
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pushl %ebp
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movl %esp,%ebp
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subl $8,%esp
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fstcw -4(%ebp) /* store fpu control word */
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movw -4(%ebp),%dx
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orw $0x0c00,%dx /* round towards -oo */
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movw %dx,-8(%ebp)
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fldcw -8(%ebp) /* load modfied control word */
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fldl 8(%ebp) /* round */
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frndint
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fldcw -4(%ebp) /* restore original control word */
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leave
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ret
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END(trunc)
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/* Enable stack protection */
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#if defined(__linux__) && defined(__ELF__)
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.section .note.GNU-stack,"",%progbits
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#endif
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