В Sun, 21 Sep 2014 17:58:44 +0400 Andrei Borzenkov <arvidj...@gmail.com> пишет:
> В Thu, 28 Aug 2014 16:56:02 -0300 > Paulo Flabiano Smorigo <pfsmor...@linux.vnet.ibm.com> пишет: > > > From: Paulo Flabiano Smorigo <pfsmor...@br.ibm.com> > > > > Hi, > > > > At the beginning of the year we provide a patchset that enabled GRUB for > > little-endian PowerPC. Our approach at the time was to build GRUB itself and > > its tools in 64-bit little-endian. One of the reasons of build in 64-bit is > > to avoid 32-bit dependencies in the distro and build a system entirely > > 64-bit. > > > > This patchset was not welcomed at the time because it would bring a > > high-maintainance-cost, without real gain since it could just be > > cross-compiled. > > > > After that, Brent Baude, Vladmir (phcoder) and I started to work in a > > solution > > that would cross-compile but without 32-bit dependencies. This patchset is > > the > > result of this new approach. It's based on the work of Brent Baude, Vladimir > > (phcoder), and Tomohiro. > > > > It can be devided in two parts: > > > > 1) Skip libgcc dependency just for ppc64el (patch 1 and 2); > > 2) Check elf endianess and byteswap if necessary (patch 3); > > > > The result is GRUB itself in 32-bit BE and its tools in 64-bit LE. This > > solution > > satisfies the needs of the distros. I tested it in three different distros, > > in > > both endianess and it's fine. > > > > Unfortunately I'm still not able to boot this version on QEMU. I build > on openSUSE for three acrhs - ppc, ppc64, ppc64le. First two are OK and > boot successfully. Third one does not work - it ends up in exception. I > get initial GRUB greeting and that's all. > > Same problem I got with Vladimir libgcc patch series. > > It could be toolkit issue of course; but still it would need fixing > before we can merge it. > > Could you help in debugging this issue? I have near to zero experience > with PPC; I can do what you tell me, but not much more. > > I run it with > > qemu-system-ppc64 -M pseries -cdrom /tmp/grub2-ppc64le.iso -boot d > > Attached is screenshot of error. > > And here is the difference in generated code in case it helps (one random module as example) ... --- /tmp/a1 2014-09-21 18:19:59.316494117 +0400 +++ /tmp/a2 2014-09-21 18:20:06.169398736 +0400 @@ -1,5 +1,5 @@ -usr.ppc/lib/grub2/powerpc-ieee1275/ext2.mod: file format elf32-powerpc +usr.ppc64le/lib/grub2/powerpc-ieee1275/ext2.mod: file format elf32-powerpc Disassembly of section .text: @@ -18,15 +18,15 @@ Disassembly of section .text: 28: 38 21 00 10 addi r1,r1,16 2c: 7c 08 03 a6 mtlr r0 30: 4e 80 00 20 blr - 34: 94 21 ff a0 stwu r1,-96(r1) + 34: 94 21 ff 90 stwu r1,-112(r1) 38: 38 e3 00 28 addi r7,r3,40 3c: 7d 80 00 26 mfcr r12 40: 39 23 00 14 addi r9,r3,20 44: 7c 08 02 a6 mflr r0 48: 39 43 00 18 addi r10,r3,24 - 4c: bf 61 00 4c stmw r27,76(r1) - 50: 90 01 00 64 stw r0,100(r1) - 54: 91 81 00 48 stw r12,72(r1) + 4c: bf 61 00 5c stmw r27,92(r1) + 50: 90 01 00 74 stw r0,116(r1) + 54: 91 81 00 58 stw r12,88(r1) 58: 3b c4 ff ff addi r30,r4,-1 5c: 7c 7f 1b 78 mr r31,r3 60: 7c bc 2b 78 mr r28,r5 @@ -103,10 +103,10 @@ Disassembly of section .text: 17c: 2f 83 00 00 cmpwi cr7,r3,0 180: 41 9e 00 08 beq cr7,188 <grub_mod_init-0xd50> 184: 81 3d 00 00 lwz r9,0(r29) - 188: 81 81 00 48 lwz r12,72(r1) - 18c: 39 61 00 60 addi r11,r1,96 + 188: 81 81 00 58 lwz r12,88(r1) + 18c: 39 61 00 70 addi r11,r1,112 190: 7d 23 4b 78 mr r3,r9 - 194: 7d 80 81 20 mtcrf 8,r12 + 194: 7d 90 81 20 mtocrf 8,r12 198: 48 00 00 00 b 198 <grub_mod_init-0xd40> 19c: 94 21 ff e0 stwu r1,-32(r1) 1a0: 7c 08 02 a6 mflr r0 @@ -234,10 +234,10 @@ Disassembly of section .text: 388: 39 61 00 20 addi r11,r1,32 38c: 80 69 00 00 lwz r3,0(r9) 390: 48 00 00 00 b 390 <grub_mod_init-0xb48> - 394: 94 21 ff b0 stwu r1,-80(r1) + 394: 94 21 ff a0 stwu r1,-96(r1) 398: 7c 08 02 a6 mflr r0 - 39c: be 61 00 1c stmw r19,28(r1) - 3a0: 90 01 00 54 stw r0,84(r1) + 39c: be 61 00 2c stmw r19,44(r1) + 3a0: 90 01 00 64 stw r0,100(r1) 3a4: 7c df 33 78 mr r31,r6 3a8: 7c be 2b 78 mr r30,r5 3ac: 83 63 00 00 lwz r27,0(r3) @@ -489,12 +489,12 @@ Disassembly of section .text: 784: 48 00 00 0c b 790 <grub_mod_init-0x748> 788: 7f c3 f3 78 mr r3,r30 78c: 7f e4 fb 78 mr r4,r31 - 790: 39 61 00 50 addi r11,r1,80 + 790: 39 61 00 60 addi r11,r1,96 794: 48 00 00 00 b 794 <grub_mod_init-0x744> - 798: 94 21 ff e0 stwu r1,-32(r1) + 798: 94 21 ff d0 stwu r1,-48(r1) 79c: 7c 08 02 a6 mflr r0 - 7a0: bf a1 00 14 stmw r29,20(r1) - 7a4: 90 01 00 24 stw r0,36(r1) + 7a0: bf a1 00 24 stmw r29,36(r1) + 7a4: 90 01 00 34 stw r0,52(r1) 7a8: 3f a0 00 00 lis r29,0 7ac: 7c 9e 23 78 mr r30,r4 7b0: 83 e3 00 00 lwz r31,0(r3) @@ -525,7 +525,7 @@ Disassembly of section .text: 814: 7f e3 fb 78 mr r3,r31 818: 48 00 00 01 bl 818 <grub_mod_init-0x6c0> 81c: 3d 20 00 00 lis r9,0 - 820: 39 61 00 20 addi r11,r1,32 + 820: 39 61 00 30 addi r11,r1,48 824: 80 69 00 00 lwz r3,0(r9) 828: 48 00 00 00 b 828 <grub_mod_init-0x6b0> 82c: 94 21 ff e0 stwu r1,-32(r1) @@ -555,13 +555,13 @@ Disassembly of section .text: 88c: 39 61 00 20 addi r11,r1,32 890: 80 69 00 00 lwz r3,0(r9) 894: 48 00 00 00 b 894 <grub_mod_init-0x644> - 898: 94 21 ff d0 stwu r1,-48(r1) + 898: 94 21 ff c0 stwu r1,-64(r1) 89c: 7c 6b 1b 78 mr r11,r3 8a0: 7c 08 02 a6 mflr r0 8a4: 7c a6 2b 78 mr r6,r5 8a8: 38 ab 00 08 addi r5,r11,8 - 8ac: bf c1 00 28 stmw r30,40(r1) - 8b0: 90 01 00 34 stw r0,52(r1) + 8ac: bf c1 00 38 stmw r30,56(r1) + 8b0: 90 01 00 44 stw r0,68(r1) 8b4: 3b cb 00 70 addi r30,r11,112 8b8: 7c 80 23 78 mr r0,r4 8bc: 80 63 00 00 lwz r3,0(r3) @@ -584,7 +584,7 @@ Disassembly of section .text: 900: 7d 64 5b 78 mr r4,r11 904: 7c 05 03 78 mr r5,r0 908: 48 00 00 01 bl 908 <grub_mod_init-0x5d0> - 90c: 39 61 00 30 addi r11,r1,48 + 90c: 39 61 00 40 addi r11,r1,64 910: 48 00 00 00 b 910 <grub_mod_init-0x5c8> 914: 7c 68 1b 78 mr r8,r3 918: 80 63 00 44 lwz r3,68(r3) @@ -596,10 +596,10 @@ Disassembly of section .text: 930: 81 08 00 14 lwz r8,20(r8) 934: 38 63 01 5c addi r3,r3,348 938: 4b ff ff 60 b 898 <grub_mod_init-0x640> - 93c: 94 21 fe c0 stwu r1,-320(r1) + 93c: 94 21 fe b0 stwu r1,-336(r1) 940: 7c 08 02 a6 mflr r0 - 944: be c1 01 18 stmw r22,280(r1) - 948: 90 01 01 44 stw r0,324(r1) + 944: be c1 01 28 stmw r22,296(r1) + 948: 90 01 01 54 stw r0,340(r1) 94c: 7c 7f 1b 78 mr r31,r3 950: 7c 9a 23 78 mr r26,r4 954: 7c b9 2b 78 mr r25,r5 @@ -715,7 +715,7 @@ Disassembly of section .text: b0c: 2f 83 00 00 cmpwi cr7,r3,0 b10: 41 9e fe b0 beq cr7,9c0 <grub_mod_init-0x518> b14: 38 60 00 01 li r3,1 - b18: 39 61 01 40 addi r11,r1,320 + b18: 39 61 01 50 addi r11,r1,336 b1c: 48 00 00 00 b b1c <grub_mod_init-0x3bc> b20: 94 21 ff d0 stwu r1,-48(r1) b24: 39 20 00 00 li r9,0 @@ -769,10 +769,10 @@ Disassembly of section .text: be4: 39 61 00 30 addi r11,r1,48 be8: 80 7f 00 00 lwz r3,0(r31) bec: 48 00 00 00 b bec <grub_mod_init-0x2ec> - bf0: 94 21 ff f0 stwu r1,-16(r1) + bf0: 94 21 ff e0 stwu r1,-32(r1) bf4: 7c 08 02 a6 mflr r0 - bf8: bf c1 00 08 stmw r30,8(r1) - bfc: 90 01 00 14 stw r0,20(r1) + bf8: bf c1 00 18 stmw r30,24(r1) + bfc: 90 01 00 24 stw r0,36(r1) c00: 7c 7f 1b 78 mr r31,r3 c04: 81 23 00 88 lwz r9,136(r3) c08: 2f 89 00 00 cmpwi cr7,r9,0 @@ -821,7 +821,7 @@ Disassembly of section .text: cb4: 7d 20 fc 2c lwbrx r9,0,r31 cb8: 7f c3 f3 78 mr r3,r30 cbc: 7d 5e 49 ae stbx r10,r30,r9 - cc0: 39 61 00 10 addi r11,r1,16 + cc0: 39 61 00 20 addi r11,r1,32 cc4: 48 00 00 00 b cc4 <grub_mod_init-0x214> cc8: 94 21 ff d0 stwu r1,-48(r1) ccc: 7c 08 02 a6 mflr r0 @@ -878,14 +878,14 @@ Disassembly of section .text: d98: 4e 80 04 21 bctrl d9c: 39 61 00 30 addi r11,r1,48 da0: 48 00 00 00 b da0 <grub_mod_init-0x138> - da4: 94 21 ff d0 stwu r1,-48(r1) + da4: 94 21 ff c0 stwu r1,-64(r1) da8: 39 20 00 00 li r9,0 dac: 7c 08 02 a6 mflr r0 - db0: bf 41 00 18 stmw r26,24(r1) + db0: bf 41 00 28 stmw r26,40(r1) db4: 3f a0 00 00 lis r29,0 db8: 7c 7f 1b 78 mr r31,r3 dbc: 80 7d 00 00 lwz r3,0(r29) - dc0: 90 01 00 34 stw r0,52(r1) + dc0: 90 01 00 44 stw r0,68(r1) dc4: 7c 9a 23 78 mr r26,r4 dc8: 91 21 00 08 stw r9,8(r1) dcc: 48 00 00 01 bl dcc <grub_mod_init-0x10c> @@ -953,23 +953,23 @@ Disassembly of section .text: ec4: 80 7b 00 00 lwz r3,0(r27) ec8: 48 00 00 01 bl ec8 <grub_mod_init-0x10> ecc: 7f a3 eb 78 mr r3,r29 - ed0: 39 61 00 30 addi r11,r1,48 + ed0: 39 61 00 40 addi r11,r1,64 ed4: 48 00 00 00 b ed4 <grub_mod_init-0x4> 00000ed8 <grub_mod_init>: - ed8: 94 21 ff f0 stwu r1,-16(r1) + ed8: 94 21 ff e0 stwu r1,-32(r1) edc: 3c 80 00 00 lis r4,0 ee0: 7c 08 02 a6 mflr r0 ee4: 38 84 00 00 addi r4,r4,0 - ee8: 93 e1 00 0c stw r31,12(r1) + ee8: 93 e1 00 1c stw r31,28(r1) eec: 7c 7f 1b 78 mr r31,r3 ef0: 3c 60 00 00 lis r3,0 - ef4: 90 01 00 14 stw r0,20(r1) + ef4: 90 01 00 24 stw r0,36(r1) ef8: 38 63 00 00 addi r3,r3,0 efc: 48 00 00 01 bl efc <grub_mod_init+0x24> f00: 3d 20 00 00 lis r9,0 f04: 93 e9 00 00 stw r31,0(r9) - f08: 39 61 00 10 addi r11,r1,16 + f08: 39 61 00 20 addi r11,r1,32 f0c: 48 00 00 00 b f0c <grub_mod_init+0x34> 00000f10 <grub_mod_fini>: _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
