Date: Mon, 13 Apr 2015 02:02:51 +0200 From: Oliver Pinter <oliver.pinter@hardenedbsd.org> To: Wojciech Puchar <wojtek@puchar.net> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: stack pointer on 64-bit architecture Message-ID: <CAPQ4fft%2BUt-ZiNM9=q3V-G9Pm3ppzqZGKJ0JS3Sw-i7mQRhUTQ@mail.gmail.com> In-Reply-To: <alpine.BSF.2.20.1504122119100.18539@laptop.wojtek.intra> References: <alpine.BSF.2.20.1504122119100.18539@laptop.wojtek.intra>
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The stack address come from this code: https://github.com/freebsd/freebsd/blob/master/sys/kern/kern_exec.c#L1065 where sv->sv_usrstack depends on architecture and on image activator. and this the other place, where the stack address is "hardcoded": https://github.com/freebsd/freebsd/blob/master/sys/kern/kern_exec.c#L1240 Just grep against sv_psstrings and sv_usrstack to see what depend on current hardcoded stack address. ;) On Sun, Apr 12, 2015 at 9:19 PM, Wojciech Puchar <wojtek@puchar.net> wrote: > what decides where stack is located when process starts on 64-bit machine > (x86-64)? > > it starts normally below 0x0000800000000000 > > can starting address be set to different (smaller) value? > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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