Date: Sun, 4 Nov 2018 03:11:55 -0800 From: Mark Millard <marklmi26-fbsd@yahoo.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: svn-src-head@freebsd.org, Alexander Richardson <arichardson@freebsd.org> Subject: Re: svn commit: r339876 - head/libexec/rtld-elf Message-ID: <7FB28CEE-9997-4F8E-B401-F6D0A1C7884C@yahoo.com> In-Reply-To: <20181103195157.GT5335@kib.kiev.ua> References: <E44F5772-1F8A-40B8-9C4E-B8362B768F37@yahoo.com> <003A49D7-6E8B-4775-A70B-E0EB44505D4B@yahoo.com> <20181102113827.GM5335@kib.kiev.ua> <7B29A4C8-228D-41CB-B594-98DFA456E9C8@yahoo.com> <20181102155234.GN5335@kib.kiev.ua> <E93B3880-281E-482C-9DA7-851398543B97@yahoo.com> <20181102185014.GP5335@kib.kiev.ua> <34554290-D26E-4FED-A598-4FB3E313EA92@yahoo.com> <20181103154955.GR5335@kib.kiev.ua> <1AD60949-F621-4F24-8985-B02102824EB1@yahoo.com> <20181103195157.GT5335@kib.kiev.ua>
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On 2018-Nov-3, at 12:51 PM, Konstantin Belousov <kostikbel at gmail.com> = wrote: > On Sat, Nov 03, 2018 at 12:04:53PM -0700, Mark Millard wrote: >> 80903 ld-elf.so.1 CALL = mmap(0x10000,0xb000,0<PROT_NONE>,0x6010<MAP_FIXED|MAP_GUARD|MAP_EXCL>,0xff= ffffff,0x10000,0,0) >> 80903 ld-elf.so.1 RET mmap -1 errno 12 Cannot allocate memory >=20 > This is the allocation of VA for the whole binary. I guess that the = normal > non-PIE binary virtual base on arm is 0x10000. >=20 > I put the arm PIE base at 0x12000, which obviously causes the conflict > between pre-loaded ld-elf.so.1 and later attempt to mmap the binary at > the linked address. In fact I am happy that we added MAP_EXCL and it > catched the situation. >=20 > You can try to change ET_DYN_LOAD_ADDR on arm: >=20 > diff --git a/sys/arm/include/elf.h b/sys/arm/include/elf.h > index 7424b45e78f..28fc14e3dae 100644 > --- a/sys/arm/include/elf.h > +++ b/sys/arm/include/elf.h > @@ -84,7 +84,7 @@ __ElfType(Auxinfo); > */ > #define MAGIC_TRAMP_NUMBER 0x5c000003 >=20 > -#define ET_DYN_LOAD_ADDR 0x12000 > +#define ET_DYN_LOAD_ADDR 0x500000 >=20 > /* Flags passed in AT_HWCAP. */ > #define HWCAP_SWP 0x00000001 /* Unsupported, = never set. */ I finally got to building-for, installing-on, booting-the, and testing-the armv7 issue. The change worked: # /libexec/ld-elf.so.1 /bin/ls -c1 .cshrc .history .k5login .lesshst .lldb .login .profile .shrc .subversion (and so on). =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)
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