Hi Nish, Mel and Eric,
I added MIPS support to libhugetlbfs. It supports heap allocation
(LD_PRELOAD=libhugetlbfs.so HUGETLB_MORECORE=yes ) currently. data and
text segment not supported yet.
I can get data and text segment backed by hugepages in libhugetlbfs
2.10, but for still-unknown reason I can't get them backed by hugepage
in 2.12. While I'm working on this problem, I submit the finished part
here.
here is the patch:
------------------------------------------------------------
diff -rN libhugetlbfs-2.12-x86/Makefile libhugetlbfs-2.12-mips/Makefile
20c20
< LDSCRIPT_DIST_ELF = elf32ppclinux elf64ppc elf_i386 elf_x86_64
---
> LDSCRIPT_DIST_ELF = elf32ppclinux elf64ppc elf_i386 elf_x86_64
elf32ltmips
82a83,89
> ifeq ($(ARCH),mips64)
> CC64 = gcc
> CC32 = gcc
> TMPLIB64 = lib64
> ELF32= elf32ltmips
> ELF64= elf64ltmips
> else
90a98
> endif
189a198,200
> ifeq ($(ARCH),mips64)
> all: libs tools
> else
190a202
> endif
diff -rN libhugetlbfs-2.12-x86/ld.hugetlbfs
libhugetlbfs-2.12-mips/ld.hugetlbfs
75a76
> elf32ltmips|elf64ltmips) HPAGE_SIZE=$((32*$MB))
SLICE_SIZE=$((32*$MB));;
diff -rN libhugetlbfs-2.12-x86/ldscripts/elf32ltmips.xB
libhugetlbfs-2.12-mips/ldscripts/elf32ltmips.xB
0a1
>
diff -rN libhugetlbfs-2.12-x86/ldscripts/elf32ltmips.xBDT
libhugetlbfs-2.12-mips/ldscripts/elf32ltmips.xBDT
0a1
>
diff -rN libhugetlbfs-2.12-x86/ldscripts/elf64ltmips.xB
libhugetlbfs-2.12-mips/ldscripts/elf64ltmips.xB
0a1
>
diff -rN libhugetlbfs-2.12-x86/ldscripts/elf64ltmips.xBDT
libhugetlbfs-2.12-mips/ldscripts/elf64ltmips.xBDT
0a1
>
diff -rN libhugetlbfs-2.12-x86/sys-elf32ltmips.S
libhugetlbfs-2.12-mips/sys-elf32ltmips.S
0a1,72
> /*
> .text
> .globl direct_syscall
> direct_syscall:
> syscall
> j $ra
> */
>
> /* code port from
> * glibc-2.1.3.tar.gz/glibc-2.1.3/sysdeps/mach/mips/syscall.S
> */
>
>
> #define zero $0 /* wired zero */
> #define AT $1 /* assembler temp - uppercase because of
".set at"
> */
> #define v0 $2 /* return value */
> #define v1 $3
> #define a0 $4 /* argument registers */
> #define a1 $5
> #define a2 $6
> #define a3 $7
> #define t0 $8 /* caller saved */
> #define t1 $9
> #define t2 $10
> #define t3 $11
> #define t4 $12
> #define t5 $13
> #define t6 $14
> #define t7 $15
> #define s0 $16 /* callee saved */
> #define s1 $17
> #define s2 $18
> #define s3 $19
> #define s4 $20
> #define s5 $21
> #define s6 $22
> #define s7 $23
> #define t8 $24 /* caller saved */
> #define t9 $25
> #define jp $25 /* PIC jump register */
> #define k0 $26 /* kernel scratch */
> #define k1 $27
> #define gp $28 /* global pointer */
> #define sp $29 /* stack pointer */
> #define fp $30 /* frame pointer */
> #define s8 $30 /* same like fp! */
> #define ra $31 /* return address
> */
>
>
> .text
> .globl direct_syscall
>
> direct_syscall:
> move v0, a0 /* Load system call number from first arg. */
> move a0, a1 /* Move the next three args up a register. */
> move a1, a2
> move a2, a3
>
> /* Load the remaining possible args (up to 11) from the stack. */
>
> ld t0,4*8(sp)
> ld t1,5*8(sp)
> ld t2,6*8(sp)
> ld t3,7*8(sp)
> ld t4,8*8(sp)
> ld t5,9*8(sp)
> ld t6,10*8(sp)
> syscall /* Do the system call. */
> j ra /* Return to caller. */
>
diff -rN libhugetlbfs-2.12-x86/sys-elf64ltmips.S
libhugetlbfs-2.12-mips/sys-elf64ltmips.S
0a1,5
> .text
> .globl direct_syscall
> direct_syscall:
> syscall
> j $ra
diff -rN libhugetlbfs-2.12-x86/tests/Makefile
libhugetlbfs-2.12-mips/tests/Makefile
39a40,41
> ARCH = $(shell uname -m | sed -e s/i.86/i386/)
>
41a44
> ifeq ($(ARCH),mips64)
44a48,50
> TESTS += $(LDSCRIPT_TESTS) $(HUGELINK_TESTS) $(HUGELINK_RW_TESTS)
> endif
> else
45a52
> ifeq ($(ARCH),mips64)
47a55,57
> else
> TESTS += $(LDSCRIPT_TESTS) $(HUGELINK_TESTS)
> endif
208a219,220
> ifneq ($(ARCH),mips64)
> xx
231a244
> endif
diff -rN libhugetlbfs-2.12-x86/tests/icache-hygiene.c
libhugetlbfs-2.12-mips/tests/icache-hygiene.c
88c88
< defined(__s390__) || defined(__s390x__) || defined(__sparc__)
---
> defined(__s390__) || defined(__s390x__) || defined(__sparc__) ||
defined(__mips__)
On Sat, Jan 15, 2011 at 04:59:27PM +0800, Yu Huang wrote:
Thanks for David, Nish and Eric's reply!
In the past 3 days I have fully tested libhugetlbfs on MIPS platform
(Loongson 3A, a MIPS R4k arch imp). I worked fine.
Before I post the patch I want to get one thing clear: do I have to
support --hugetlbfs-link option? Is this a MUST? Since I have only
make the code to support --hugetlbfs-align. I don't want to do the dirty
work of writing ldscripts for MIPS. --hugetlbfs-align is truely enough
for us.
I don't see any good reason to implement the old broken relinking
method on a new port.
Since I don't support --hugetlbfs-link option, some test programs in
tests/ directory don't compile. Currently I simply comment them
out.
While you're testing internally, yes.
For release, you'll need to teach the run_tests script to
automatically run the old-style link tests only on platforms which
support them.
--
Raywill
NCIC. ICT. China
diff -rN libhugetlbfs-2.12-x86/ld.hugetlbfs libhugetlbfs-2.12-mips/ld.hugetlbfs
75a76
> elf32ltsmip|elf64ltsmip) HPAGE_SIZE=$((32*$MB)) SLICE_SIZE=$((32*$MB));;
diff -rN libhugetlbfs-2.12-x86/ldscripts/elf32ltsmip.xB
libhugetlbfs-2.12-mips/ldscripts/elf32ltsmip.xB
0a1,270
> /* Script for -z combreloc: combine and sort reloc sections */
> OUTPUT_FORMAT("elf32-tradlittlemips", "elf32-tradbigmips",
> "elf32-tradlittlemips")
> OUTPUT_ARCH(mips)
> ENTRY(__start)
> SEARCH_DIR("/usr/mipsel-linux-gnu/lib"); SEARCH_DIR("/usr/local/lib");
> SEARCH_DIR("/lib"); SEARCH_DIR("/usr/lib");
> INPUT(-lhugetlbfs);
> /* Do we need any of these for elf?
> __DYNAMIC = 0; */
> PHDRS
> {
> headers PT_PHDR PHDRS ;
> interp PT_INTERP ;
> text PT_LOAD FILEHDR PHDRS ;
> data PT_LOAD ;
> htlb PT_LOAD FLAGS (0x00100007);
> dynamic PT_DYNAMIC ;
> note PT_NOTE ;
> gnu_stack PT_GNU_STACK ;
> /* this is the value of PT_GNU_EH_FRAME as defined in
> usr/include/elf.h but binutils does not recognize that identifier
> as it does other PT_ constants. */
> eh_frame_hdr 1685382480 FLAGS (0x00000004);
> }
>
>
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diff -rN libhugetlbfs-2.12-x86/ldscripts/elf32ltsmip.xBDT
libhugetlbfs-2.12-mips/ldscripts/elf32ltsmip.xBDT
0a1,249
> /* Script for -z combreloc: combine and sort reloc sections */
> OUTPUT_FORMAT("elf32-tradlittlemips", "elf32-tradbigmips",
> "elf32-tradlittlemips")
> OUTPUT_ARCH(mips)
> ENTRY(__start)
> SEARCH_DIR("/usr/mipsel-linux-gnu/lib"); SEARCH_DIR("/usr/local/lib");
> SEARCH_DIR("/lib"); SEARCH_DIR("/usr/lib");
> SECTIONS
> {
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diff -rN libhugetlbfs-2.12-x86/ldscripts/elf64ltsmip.xB
libhugetlbfs-2.12-mips/ldscripts/elf64ltsmip.xB
0a1,241
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diff -rN libhugetlbfs-2.12-x86/ldscripts/elf64ltsmip.xBDT
libhugetlbfs-2.12-mips/ldscripts/elf64ltsmip.xBDT
0a1,239
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> .fini_array :
> {
> PROVIDE_HIDDEN (__fini_array_start = .);
> KEEP (*(.fini_array))
> KEEP (*(SORT(.fini_array.*)))
> PROVIDE_HIDDEN (__fini_array_end = .);
> }
> .ctors :
> {
> /* gcc uses crtbegin.o to find the start of
> the constructors, so we make sure it is
> first. Because this is a wildcard, it
> doesn't matter if the user does not
> actually link against crtbegin.o; the
> linker won't look for a file to match a
> wildcard. The wildcard also means that it
> doesn't matter which directory crtbegin.o
> is in. */
> KEEP (*crtbegin.o(.ctors))
> KEEP (*crtbegin?.o(.ctors))
> /* We don't want to include the .ctor section from
> the crtend.o file until after the sorted ctors.
> The .ctor section from the crtend file contains the
> end of ctors marker and it must be last */
> KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
> KEEP (*(SORT(.ctors.*)))
> KEEP (*(.ctors))
> }
> .dtors :
> {
> KEEP (*crtbegin.o(.dtors))
> KEEP (*crtbegin?.o(.dtors))
> KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
> KEEP (*(SORT(.dtors.*)))
> KEEP (*(.dtors))
> }
> .jcr : { KEEP (*(.jcr)) }
> .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*)
> *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*) }
> . = DATA_SEGMENT_RELRO_END (0, .);
> .data :
> {
> _fdata = . ;
> *(.data .data.* .gnu.linkonce.d.*)
> KEEP (*(.gnu.linkonce.d.*personality*))
> SORT(CONSTRUCTORS)
> }
> .data1 : { *(.data1) }
> . = .;
> _gp = ALIGN(16) + 0x7ff0;
> .got : { *(.got.plt) *(.got) }
> /* We want the small data sections together, so single-instruction offsets
> can access them all, and initialized data all before uninitialized, so
> we can shorten the on-disk segment size. */
> .sdata :
> {
> *(.sdata .sdata.* .gnu.linkonce.s.*)
> }
> .lit8 : { *(.lit8) }
> .lit4 : { *(.lit4) }
> .srdata : { *(.srdata) }
> _edata = .; PROVIDE (edata = .);
> __bss_start = .;
> _fbss = .;
> .sbss :
> {
> *(.dynsbss)
> *(.sbss .sbss.* .gnu.linkonce.sb.*)
> *(.scommon)
> }
> .bss :
> {
> *(.dynbss)
> *(.bss .bss.* .gnu.linkonce.b.*)
> *(COMMON)
> /* Align here to ensure that the .bss section occupies space up to
> _end. Align after .bss to ensure correct alignment even if the
> .bss section disappears because there are no input sections.
> FIXME: Why do we need it? When there is no .bss section, we don't
> pad the .data section. */
> . = ALIGN(. != 0 ? 64 / 8 : 1);
> }
> . = ALIGN(64 / 8);
> . = ALIGN(64 / 8);
> _end = .; PROVIDE (end = .);
> . = DATA_SEGMENT_END (.);
> /* Stabs debugging sections. */
> .stab 0 : { *(.stab) }
> .stabstr 0 : { *(.stabstr) }
> .stab.excl 0 : { *(.stab.excl) }
> .stab.exclstr 0 : { *(.stab.exclstr) }
> .stab.index 0 : { *(.stab.index) }
> .stab.indexstr 0 : { *(.stab.indexstr) }
> .comment 0 : { *(.comment) }
> /* DWARF debug sections.
> Symbols in the DWARF debugging sections are relative to the beginning
> of the section so we begin them at 0. */
> /* DWARF 1 */
> .debug 0 : { *(.debug) }
> .line 0 : { *(.line) }
> /* GNU DWARF 1 extensions */
> .debug_srcinfo 0 : { *(.debug_srcinfo) }
> .debug_sfnames 0 : { *(.debug_sfnames) }
> /* DWARF 1.1 and DWARF 2 */
> .debug_aranges 0 : { *(.debug_aranges) }
> .debug_pubnames 0 : { *(.debug_pubnames) }
> /* DWARF 2 */
> .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
> .debug_abbrev 0 : { *(.debug_abbrev) }
> .debug_line 0 : { *(.debug_line) }
> .debug_frame 0 : { *(.debug_frame) }
> .debug_str 0 : { *(.debug_str) }
> .debug_loc 0 : { *(.debug_loc) }
> .debug_macinfo 0 : { *(.debug_macinfo) }
> /* SGI/MIPS DWARF 2 extensions */
> .debug_weaknames 0 : { *(.debug_weaknames) }
> .debug_funcnames 0 : { *(.debug_funcnames) }
> .debug_typenames 0 : { *(.debug_typenames) }
> .debug_varnames 0 : { *(.debug_varnames) }
> /* DWARF 3 */
> .debug_pubtypes 0 : { *(.debug_pubtypes) }
> .debug_ranges 0 : { *(.debug_ranges) }
> .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
> .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) }
> .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) }
> /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) }
> }
diff -rN libhugetlbfs-2.12-x86/Makefile libhugetlbfs-2.12-mips/Makefile
20c20
< LDSCRIPT_DIST_ELF = elf32ppclinux elf64ppc elf_i386 elf_x86_64
---
> LDSCRIPT_DIST_ELF = elf32ppclinux elf64ppc elf_i386 elf_x86_64 elf32ltsmip
82a83,89
> ifeq ($(ARCH),mips64)
> CC64 = gcc
> CC32 = gcc
> TMPLIB64 = lib64
> ELF32= elf32ltmips
> ELF64= elf64ltmips
> else
90a98
> endif
189a198,200
> ifeq ($(ARCH),mips64)
> all: libs tools
> else
190a202
> endif
diff -rN libhugetlbfs-2.12-x86/sys-elf32ltsmip.S
libhugetlbfs-2.12-mips/sys-elf32ltsmip.S
0a1,72
> /*
> .text
> .globl direct_syscall
> direct_syscall:
> syscall
> j $ra
> */
>
> /* code port from
> * glibc-2.1.3.tar.gz/glibc-2.1.3/sysdeps/mach/mips/syscall.S
> */
>
>
> #define zero $0 /* wired zero */
> #define AT $1 /* assembler temp - uppercase because of ".set at"
> */
> #define v0 $2 /* return value */
> #define v1 $3
> #define a0 $4 /* argument registers */
> #define a1 $5
> #define a2 $6
> #define a3 $7
> #define t0 $8 /* caller saved */
> #define t1 $9
> #define t2 $10
> #define t3 $11
> #define t4 $12
> #define t5 $13
> #define t6 $14
> #define t7 $15
> #define s0 $16 /* callee saved */
> #define s1 $17
> #define s2 $18
> #define s3 $19
> #define s4 $20
> #define s5 $21
> #define s6 $22
> #define s7 $23
> #define t8 $24 /* caller saved */
> #define t9 $25
> #define jp $25 /* PIC jump register */
> #define k0 $26 /* kernel scratch */
> #define k1 $27
> #define gp $28 /* global pointer */
> #define sp $29 /* stack pointer */
> #define fp $30 /* frame pointer */
> #define s8 $30 /* same like fp! */
> #define ra $31 /* return address
> */
>
>
> .text
> .globl direct_syscall
>
> direct_syscall:
> move v0, a0 /* Load system call number from first arg. */
> move a0, a1 /* Move the next three args up a register. */
> move a1, a2
> move a2, a3
>
> /* Load the remaining possible args (up to 11) from the stack. */
>
> ld t0,4*8(sp)
> ld t1,5*8(sp)
> ld t2,6*8(sp)
> ld t3,7*8(sp)
> ld t4,8*8(sp)
> ld t5,9*8(sp)
> ld t6,10*8(sp)
> syscall /* Do the system call. */
> j ra /* Return to caller. */
>
diff -rN libhugetlbfs-2.12-x86/sys-elf64ltsmip.S
libhugetlbfs-2.12-mips/sys-elf64ltsmip.S
0a1,5
> .text
> .globl direct_syscall
> direct_syscall:
> syscall
> j $ra
diff -rN libhugetlbfs-2.12-x86/tests/icache-hygiene.c
libhugetlbfs-2.12-mips/tests/icache-hygiene.c
88c88
< defined(__s390__) || defined(__s390x__) || defined(__sparc__)
---
> defined(__s390__) || defined(__s390x__) || defined(__sparc__) ||
> defined(__mips__)
diff -rN libhugetlbfs-2.12-x86/tests/Makefile
libhugetlbfs-2.12-mips/tests/Makefile
39a40,41
> ARCH = $(shell uname -m | sed -e s/i.86/i386/)
>
41a44
> ifeq ($(ARCH),mips64)
44a48,50
> TESTS += $(LDSCRIPT_TESTS) $(HUGELINK_TESTS) $(HUGELINK_RW_TESTS)
> endif
> else
45a52
> ifeq ($(ARCH),mips64)
47a55,57
> else
> TESTS += $(LDSCRIPT_TESTS) $(HUGELINK_TESTS)
> endif
208a219,220
> ifneq ($(ARCH),mips64)
> xx
231a244
> endif
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