Re: [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb

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* Re: [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb
       [not found] ` <200409060239.i862dAh2001466@hiauly1.hia.nrc.ca>
@ 2004-09-06 19:58   ` Carlos O'Donell
  2004-09-06 21:49   ` Joel Soete
  1 sibling, 0 replies; 10+ messages in thread
From: Carlos O'Donell @ 2004-09-06 19:58 UTC (permalink / raw)
  To: John David Anglin; +Cc: parisc-linux

On Sun, Sep 05, 2004 at 10:39:10PM -0400, John David Anglin wrote:
> >      0x411cc740 <_dl_make_fptr+112>: ldw,s r7(,r6),ret0
> > in:
> > r7 == 0x7c4
> > r6 == 0x0
> 
> r6 is wrong.  Find out why it is zero.

Agreed. It's crashing because it has bogus input in my opinion.

c.

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* Re: [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb
       [not found] ` <200409060239.i862dAh2001466@hiauly1.hia.nrc.ca>
  2004-09-06 19:58   ` [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb Carlos O'Donell
@ 2004-09-06 21:49   ` Joel Soete
  2004-09-11 18:22     ` [parisc-linux] stay the same with gcc-3.4.2 :( [was: back to glibc-2.3.3 & gcc-3.4.1 pb] Joel Soete
  1 sibling, 1 reply; 10+ messages in thread
From: Joel Soete @ 2004-09-06 21:49 UTC (permalink / raw)
  To: John David Anglin; +Cc: parisc-linux

Hello Dave,

John David Anglin wrote:
>>     0x411cc740 <_dl_make_fptr+112>: ldw,s r7(,r6),ret0
>>in:
>>r7 == 0x7c4
>>r6 == 0x0
> 
> 
> r6 is wrong.  Find out why it is zero.
> 
Far from being an expert, with help of ddd it seems that:
ElfW(Addr)
_dl_make_fptr (struct link_map *map, const ElfW(Sym) *sym,
                ElfW(Addr) ip)
{
   ElfW(Addr) *ftab = map->l_mach.fptr_table;	<====[2]

(Elf32_Addr *)fptr_table == (Elf32_Addr *) 0x0

(the same for gcc-3.3 ;) )

is:
Dump of assembler code from 0x411e371c to 0x411e381c:
     0x411e371c <_dl_make_fptr+76>:  ldw 1fc(,r26),r6 (r6 == 0x0)

the weird stuff his in fact here:

   if (__builtin_expect (ftab == NULL, 0))
     ftab = make_fptr_table (map);

with gcc-3.3 the register (r7) (which seems to me contains the value pointed by ftab) is well the one addressed by 
map->l_mach.fptr_table ie map->l_mach.fptr_table == 0x40001000 (and btw map->l_mach.fptr_table_len == 2067)

OTC with gcc-3.4 the register (r6) after the 'call' of the inlined make_fptr_table() is restored to its starting value i.e.: 0x0
eventhought that map->l_mach.fptr_table == 0x40001000 (and btw map->l_mach.fptr_table_len == 2067) exactly the same as gcc-3.3.

duno if it could help:
for gcc-3.3 the text is:
Dump of assembler code from 0x412630d0 to 0x412631d0:
     0x412630d0 <_dl_make_fptr+44>:  ldw 1fc(,r26),r7	<====[2]
     0x412630d4 <_dl_make_fptr+48>:  copy r26,r8
     0x412630d8 <_dl_make_fptr+52>:  cmpib,= 0,r7,0x412631a0 <_dl_make_fptr+252>	<===='call' make_fptr_table()
     0x412630dc <_dl_make_fptr+56>:  copy r25,r3
     0x412630e0 <_dl_make_fptr+60>:  ldw 30(,r8),r20
     0x412630e4 <_dl_make_fptr+64>:  ldw 1f8(,r8),r22
     0x412630e8 <_dl_make_fptr+68>:  ldw 4(,r20),r21
     0x412630ec <_dl_make_fptr+72>:  sub r3,r21,r21
     0x412630f0 <_dl_make_fptr+76>:  extrw,s r21,27,28,r21
     0x412630f4 <_dl_make_fptr+80>:  cmpb,<<= r22,r21,0x41263184 <_dl_make_fptr+224>
     0x412630f8 <_dl_make_fptr+84>:  depw,z r21,29,30,r9
     0x412630fc <_dl_make_fptr+88>:  add,l r9,r7,r21
     0x41263100 <_dl_make_fptr+92>:  ldw 0(,r21),r20
     0x41263104 <_dl_make_fptr+96>:  cmpib,<> 0,r20,0x41263150 <_dl_make_fptr+172>
     0x41263108 <_dl_make_fptr+100>: copy r21,r3
     0x4126310c <_dl_make_fptr+104>: copy r21,r6
     0x41263110 <_dl_make_fptr+108>: addil 0,r19,%r1
     0x41263114 <_dl_make_fptr+112>: ldw 5dc(,r1),r5
     0x41263118 <_dl_make_fptr+116>: ldw 24(,r8),r20
     0x4126311c <_dl_make_fptr+120>: copy r19,r4
     0x41263120 <_dl_make_fptr+124>: copy r10,r26
     0x41263124 <_dl_make_fptr+128>: b,l 0x41262fc4 <make_fdesc>,rp
     0x41263128 <_dl_make_fptr+132>: ldw 4(,r20),r25
     0x4126312c <_dl_make_fptr+136>: ldw 0(,r3),r20
     0x41263130 <_dl_make_fptr+140>: cmpib,= 0,r20,0x4126317c <_dl_make_fptr+216>
     0x41263134 <_dl_make_fptr+144>: copy r4,r19
     0x41263138 <_dl_make_fptr+148>: ldw 4(,r5),r20
     0x4126313c <_dl_make_fptr+152>: stw r20,0(,ret0)
     0x41263140 <_dl_make_fptr+156>: stw ret0,4(,r5)
     0x41263144 <_dl_make_fptr+160>: ldw 0(,r6),r20
     0x41263148 <_dl_make_fptr+164>: cmpib,=,n 0,r20,0x4126311c <_dl_make_fptr+120>
     0x4126314c <_dl_make_fptr+168>: ldw 24(,r8),r20
     0x41263150 <_dl_make_fptr+172>: ldw r7(,r9),ret0
     0x41263154 <_dl_make_fptr+176>: ldw -94(,sp),rp
     0x41263158 <_dl_make_fptr+180>: ldw -7c(,sp),r9
     0x4126315c <_dl_make_fptr+184>: ldw -78(,sp),r8
     0x41263160 <_dl_make_fptr+188>: ldw -74(,sp),r7
     0x41263164 <_dl_make_fptr+192>: ldw -70(,sp),r6
     0x41263168 <_dl_make_fptr+196>: ldw -6c(,sp),r5
     0x4126316c <_dl_make_fptr+200>: ldw -68(,sp),r4
     0x41263170 <_dl_make_fptr+204>: ldw -64(,sp),r3
     0x41263174 <_dl_make_fptr+208>: bv r0(rp)
     0x41263178 <_dl_make_fptr+212>: ldw,mb -80(,sp),r10
     0x4126317c <_dl_make_fptr+216>: b,l 0x41263150 <_dl_make_fptr+172>,r0
     0x41263180 <_dl_make_fptr+220>: stw ret0,0(,r3)
     0x41263184 <_dl_make_fptr+224>: addil 0,r19,%r1
     0x41263188 <_dl_make_fptr+228>: ldi 0,r26
     0x4126318c <_dl_make_fptr+232>: ldw 5e4(,r1),r1
     0x41263190 <_dl_make_fptr+236>: copy r1,r23
     0x41263194 <_dl_make_fptr+240>: ldi 0,r25
     0x41263198 <_dl_make_fptr+244>: b,l 0x4125e4f8 <_dl_signal_error>,rp
     0x4126319c <_dl_make_fptr+248>: ldi 0,r24
     0x412631a0 <_dl_make_fptr+252>: ldw 2c(,r26),r21		<==== map->l_mach.fptr_table()
     0x412631a4 <_dl_make_fptr+256>: ldw 30(,r26),r20
     0x412631a8 <_dl_make_fptr+260>: addil 0,r19,%r1
     0x412631ac <_dl_make_fptr+264>: copy r19,r4
     0x412631b0 <_dl_make_fptr+268>: ldw 4(,r20),r22
     0x412631b4 <_dl_make_fptr+272>: ldw 4(,r21),r26
     0x412631b8 <_dl_make_fptr+276>: ldi 3,r24
     0x412631bc <_dl_make_fptr+280>: ldi 12,r23
     0x412631c0 <_dl_make_fptr+284>: ldw 44(,r8),r21
     0x412631c4 <_dl_make_fptr+288>: sub r26,r22,r26
     0x412631c8 <_dl_make_fptr+292>: ldw 654(,r1),r1
     0x412631cc <_dl_make_fptr+296>: ldw 4(,r21),r25
     0x412631d0 <_dl_make_fptr+300>: ldw 4(,r1),r20
     0x412631d4 <_dl_make_fptr+304>: ldi -1,r21
     0x412631d8 <_dl_make_fptr+308>: b,l 0x41265570 <$$divU>,r31
     0x412631dc <_dl_make_fptr+312>: sub r0,r20,r22
     0x412631e0 <_dl_make_fptr+316>: stw r21,-34(,sp)
     0x412631e4 <_dl_make_fptr+320>: ldi 0,r26
     0x412631e8 <_dl_make_fptr+324>: depw,z ret1,29,30,r5
     0x412631ec <_dl_make_fptr+328>: stw r0,-38(,sp)
     0x412631f0 <_dl_make_fptr+332>: copy ret1,r6
     0x412631f4 <_dl_make_fptr+336>: add,l r5,r20,r20
     0x412631f8 <_dl_make_fptr+340>: add,l r20,r21,r20
     0x412631fc <_dl_make_fptr+344>: and r20,r22,r20
     0x41263200 <_dl_make_fptr+348>: b,l 0x412641bc <__mmap>,rp
     0x41263204 <_dl_make_fptr+352>: copy r20,r25
     0x41263208 <_dl_make_fptr+356>: copy r4,r19
     0x4126320c <_dl_make_fptr+360>: cmpib,= -1,ret0,0x4126323c <_dl_make_fptr+408>
     0x41263210 <_dl_make_fptr+364>: copy ret0,r26
     0x41263214 <_dl_make_fptr+368>: ldw 1fc(,r8),r20
     0x41263218 <_dl_make_fptr+372>: cmpib,<>,n 0,r20,0x4126322c <_dl_make_fptr+392>
     0x4126321c <_dl_make_fptr+376>: stw ret0,1fc(,r8)
     0x41263220 <_dl_make_fptr+380>: stw r6,1f8(,r8)
     0x41263224 <_dl_make_fptr+384>: b,l 0x412630e0 <_dl_make_fptr+60>,r0
     0x41263228 <_dl_make_fptr+388>: ldw 1fc(,r8),r7	<==== return map->l_mach.fptr_table;
     0x4126322c <_dl_make_fptr+392>: b,l 0x4126421c <munmap>,rp
     0x41263230 <_dl_make_fptr+396>: copy r5,r25
     0x41263234 <_dl_make_fptr+400>: b,l 0x41263224 <_dl_make_fptr+384>,r0
     0x41263238 <_dl_make_fptr+404>: copy r4,r19
     0x4126323c <_dl_make_fptr+408>: addil 0,r4,%r1
     0x41263240 <_dl_make_fptr+412>: copy r1,r20
     0x41263244 <_dl_make_fptr+416>: ldw 62c(,r20),r20
     0x41263248 <_dl_make_fptr+420>: ldw 0(,r20),r26
     0x4126324c <_dl_make_fptr+424>: addil 0,r4,%r1
     0x41263250 <_dl_make_fptr+428>: ldw 5e8(,r1),r21
     0x41263254 <_dl_make_fptr+432>: b,l 0x41263194 <_dl_make_fptr+240>,r0
     0x41263258 <_dl_make_fptr+436>: copy r21,r23
  [...]

and for gcc-3.4:
Dump of assembler code from 0x4128571c to 0x4128581c:
     0x4128571c <_dl_make_fptr+76>:  ldw 1fc(,r26),r6	<====[2]
     0x41285720 <_dl_make_fptr+80>:  cmpib,= 0,r6,0x412858f4 <_dl_make_fptr+548>	<===='call' make_fptr_table()
     0x41285724 <_dl_make_fptr+84>:  copy r25,r3
     0x41285728 <_dl_make_fptr+88>:  ldw 1f8(,r26),ret1
     0x4128572c <_dl_make_fptr+92>:  ldw 30(,r10),r21
     0x41285730 <_dl_make_fptr+96>:  ldw 4(,r21),r20
     0x41285734 <_dl_make_fptr+100>: sub r3,r20,r20
     0x41285738 <_dl_make_fptr+104>: extrw,s r20,27,28,r7
     0x4128573c <_dl_make_fptr+108>: cmpb,>>=,n r7,ret1,0x412859d0 <_dl_make_fptr+768>
     0x41285740 <_dl_make_fptr+112>: ldw,s r7(,r6),ret0
     0x41285744 <_dl_make_fptr+116>: cmpib,<> 0,ret0,0x412857c8 <_dl_make_fptr+248>
     0x41285748 <_dl_make_fptr+120>: addil 0,r19,%r1
     0x4128574c <_dl_make_fptr+124>: depw,z r7,29,30,r11
     0x41285750 <_dl_make_fptr+128>: ldw 638(,r1),r13
     0x41285754 <_dl_make_fptr+132>: addil 0,r19,%r1
     0x41285758 <_dl_make_fptr+136>: ldw 5c0(,r1),r5
     0x4128575c <_dl_make_fptr+140>: addil 0,r19,%r1
     0x41285760 <_dl_make_fptr+144>: ldo -78(sp),r14
     0x41285764 <_dl_make_fptr+148>: ldw 610(,r1),r16
     0x41285768 <_dl_make_fptr+152>: add,l r11,r6,r15
     0x4128576c <_dl_make_fptr+156>: copy r5,r9
     0x41285770 <_dl_make_fptr+160>: ldw 24(,r10),r20
     0x41285774 <_dl_make_fptr+164>: ldw 4(,r20),r8
     0x41285778 <_dl_make_fptr+168>: ldw 0(,r5),r3
     0x4128577c <_dl_make_fptr+172>: ldw 4(,r3),r23
     0x41285780 <_dl_make_fptr+176>: ldw 8(,r3),r20
     0x41285784 <_dl_make_fptr+180>: cmpb,>>= r20,r23,0x4128580c <_dl_make_fptr+316>
     0x41285788 <_dl_make_fptr+184>: ldo 1(r20),r22
     0x4128578c <_dl_make_fptr+188>: ldw 8(,r3),r21
     0x41285790 <_dl_make_fptr+192>: cmpb,<> r20,r21,0x41285780 <_dl_make_fptr+176>
     0x41285794 <_dl_make_fptr+196>: shladd,l r21,3,r3,r20
     0x41285798 <_dl_make_fptr+200>: stw r22,8(,r3)
     0x4128579c <_dl_make_fptr+204>: ldo c(r20),r26
     0x412857a0 <_dl_make_fptr+208>: stw r8,4(,r26)
     0x412857a4 <_dl_make_fptr+212>: stw r12,0(,r26)
     0x412857a8 <_dl_make_fptr+216>: ldw r11(,r6),r20
     0x412857ac <_dl_make_fptr+220>: cmpib,=,n 0,r20,0x412858a8 <_dl_make_fptr+472>
     0x412857b0 <_dl_make_fptr+224>: ldw 4(,r9),r20
     0x412857b4 <_dl_make_fptr+228>: stw r20,0(,r26)
     0x412857b8 <_dl_make_fptr+232>: stw r26,4(,r9)
     0x412857bc <_dl_make_fptr+236>: ldw,s r7(,r6),ret0
     0x412857c0 <_dl_make_fptr+240>: cmpib,=,n 0,ret0,0x41285774 <_dl_make_fptr+164>
     0x412857c4 <_dl_make_fptr+244>: ldw 24(,r10),r20
     0x412857c8 <_dl_make_fptr+248>: ldw -94(,sp),rp
     0x412857cc <_dl_make_fptr+252>: ldw -74(,sp),r16
     0x412857d0 <_dl_make_fptr+256>: ldw -70(,sp),r15
     0x412857d4 <_dl_make_fptr+260>: ldw -6c(,sp),r14
     0x412857d8 <_dl_make_fptr+264>: ldw -68(,sp),r13
     0x412857dc <_dl_make_fptr+268>: ldw -64(,sp),r12
     0x412857e0 <_dl_make_fptr+272>: ldw -60(,sp),r11
     0x412857e4 <_dl_make_fptr+276>: ldw -5c(,sp),r10
     0x412857e8 <_dl_make_fptr+280>: ldw -58(,sp),r9
     0x412857ec <_dl_make_fptr+284>: ldw -54(,sp),r8
     0x412857f0 <_dl_make_fptr+288>: ldw -50(,sp),r7
     0x412857f4 <_dl_make_fptr+292>: ldw -4c(,sp),r6
     0x412857f8 <_dl_make_fptr+296>: ldw -48(,sp),r5
     0x412857fc <_dl_make_fptr+300>: ldw -44(,sp),r4
     0x41285800 <_dl_make_fptr+304>: ldw -40(,sp),r3
     0x41285804 <_dl_make_fptr+308>: bv r0(rp)
     0x41285808 <_dl_make_fptr+312>: ldo -80(sp),sp
     0x4128580c <_dl_make_fptr+316>: ldw 4(,r5),r20
     0x41285810 <_dl_make_fptr+320>: cmpib,<>,n 0,r20,0x41285984 <_dl_make_fptr+692>
     0x41285814 <_dl_make_fptr+324>: ldw 8(,r5),r21
     0x41285818 <_dl_make_fptr+328>: depw,z r21,30,31,r20

Dump of assembler code from 0x412858f4 to 0x412859f4:
     0x412858f4 <_dl_make_fptr+548>: ldw 30(,r26),r20	<==== map->l_mach.fptr_table()
     0x412858f8 <_dl_make_fptr+552>: ldw 4(,r20),r21
     0x412858fc <_dl_make_fptr+556>: addil 0,r19,%r1
     0x41285900 <_dl_make_fptr+560>: copy r1,r22
     0x41285904 <_dl_make_fptr+564>: ldw 2c(,r26),r20
     0x41285908 <_dl_make_fptr+568>: ldw 4(,r20),r26
     0x4128590c <_dl_make_fptr+572>: sub r26,r21,r26
     0x41285910 <_dl_make_fptr+576>: ldw 44(,r10),r20
     0x41285914 <_dl_make_fptr+580>: ldw 4(,r20),r25
     0x41285918 <_dl_make_fptr+584>: b,l 0x41287d60 <$$divU>,r31
     0x4128591c <_dl_make_fptr+588>: copy r19,r4
     0x41285920 <_dl_make_fptr+592>: ldi -1,r20
     0x41285924 <_dl_make_fptr+596>: stw r20,-34(,sp)
     0x41285928 <_dl_make_fptr+600>: ldi 0,r26
     0x4128592c <_dl_make_fptr+604>: ldw 638(,r22),r20
     0x41285930 <_dl_make_fptr+608>: ldw 4(,r20),r25
     0x41285934 <_dl_make_fptr+612>: depw,z ret1,29,30,r5
     0x41285938 <_dl_make_fptr+616>: ldi 3,r24
     0x4128593c <_dl_make_fptr+620>: sub r0,r25,r20
     0x41285940 <_dl_make_fptr+624>: copy ret1,r6
     0x41285944 <_dl_make_fptr+628>: stw r0,-38(,sp)
     0x41285948 <_dl_make_fptr+632>: add,l r5,r25,r25
     0x4128594c <_dl_make_fptr+636>: ldi 12,r23
     0x41285950 <_dl_make_fptr+640>: ldo -1(r25),r25
     0x41285954 <_dl_make_fptr+644>: b,l 0x412869a8 <__mmap>,rp
     0x41285958 <_dl_make_fptr+648>: and r25,r20,r25
     0x4128595c <_dl_make_fptr+652>: copy r4,r19
     0x41285960 <_dl_make_fptr+656>: cmpib,= -1,ret0,0x412859e0 <_dl_make_fptr+784>
     0x41285964 <_dl_make_fptr+660>: copy ret0,r26
     0x41285968 <_dl_make_fptr+664>: ldw 1fc(,r10),r20
     0x4128596c <_dl_make_fptr+668>: cmpib,<>,n 0,r20,0x412859a0 <_dl_make_fptr+720>
     0x41285970 <_dl_make_fptr+672>: copy r6,ret1
     0x41285974 <_dl_make_fptr+676>: stw r6,1f8(,r10)
     0x41285978 <_dl_make_fptr+680>: ldw 1fc(,r10),r6
     0x4128597c <_dl_make_fptr+684>: b,l 0x4128572c <_dl_make_fptr+92>,r0
     0x41285980 <_dl_make_fptr+688>: stw ret0,1fc(,r10)	<==== return map->l_mach.fptr_table;
     0x41285984 <_dl_make_fptr+692>: copy r20,r26
     0x41285988 <_dl_make_fptr+696>: ldw 0(,r20),r20
     0x4128598c <_dl_make_fptr+700>: b,l 0x412857a0 <_dl_make_fptr+208>,r0
     0x41285990 <_dl_make_fptr+704>: stw r20,4(,r5)
     0x41285994 <_dl_make_fptr+708>: stw ret0,0(,r5)
     0x41285998 <_dl_make_fptr+712>: b,l 0x412857a0 <_dl_make_fptr+208>,r0
     0x4128599c <_dl_make_fptr+716>: ldo c(ret0),r26
     0x412859a0 <_dl_make_fptr+720>: b,l 0x41286a04 <munmap>,rp
     0x412859a4 <_dl_make_fptr+724>: copy r5,r25
     0x412859a8 <_dl_make_fptr+728>: ldw 1f8(,r10),ret1
     0x412859ac <_dl_make_fptr+732>: ldw 1fc(,r10),r6
     0x412859b0 <_dl_make_fptr+736>: b,l 0x4128572c <_dl_make_fptr+92>,r0
     0x412859b4 <_dl_make_fptr+740>: copy r4,r19
     0x412859b8 <_dl_make_fptr+744>: addil 0,r4,%r1
     0x412859bc <_dl_make_fptr+748>: ldw 0(,r16),r26
     0x412859c0 <_dl_make_fptr+752>: ldw 5c4(,r1),r23
     0x412859c4 <_dl_make_fptr+756>: ldi 0,r25
     0x412859c8 <_dl_make_fptr+760>: b,l 0x41280f10 <_dl_signal_error>,rp
     0x412859cc <_dl_make_fptr+764>: ldi 0,r24
     0x412859d0 <_dl_make_fptr+768>: addil 0,r19,%r1
     0x412859d4 <_dl_make_fptr+772>: ldi 0,r26
     0x412859d8 <_dl_make_fptr+776>: b,l 0x412859c4 <_dl_make_fptr+756>,r0
     0x412859dc <_dl_make_fptr+780>: ldw 5c8(,r1),r23
     0x412859e0 <_dl_make_fptr+784>: addil 0,r4,%r1
     0x412859e4 <_dl_make_fptr+788>: ldw 610(,r1),r20
     0x412859e8 <_dl_make_fptr+792>: ldw 0(,r20),r26
     0x412859ec <_dl_make_fptr+796>: addil 0,r4,%r1
     0x412859f0 <_dl_make_fptr+800>: b,l 0x412859c4 <_dl_make_fptr+756>,r0
End of assembler dump.

I have to thought more on how to create a test case (all advise is always well come :) )

Joel
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^ permalink raw reply	[flat|nested] 10+ messages in thread
* [parisc-linux] stay the same with gcc-3.4.2 :( [was: back to glibc-2.3.3 & gcc-3.4.1 pb]
  2004-09-06 21:49   ` Joel Soete
@ 2004-09-11 18:22     ` Joel Soete
  2004-09-12 20:21       ` [parisc-linux] " Joel Soete
  0 siblings, 1 reply; 10+ messages in thread
From: Joel Soete @ 2004-09-11 18:22 UTC (permalink / raw)
  To: Joel Soete; +Cc: John David Anglin, parisc-linux

Hello all,

I didn't do much more because I was very busy elsewhere and also because of the announce of gcc-3.4.2.
I was hoping that it fix the pb but unfortunately it's not the case :(

I will so continue investigation ;)

See you latter,
	Joel

Joel Soete wrote:
> Hello Dave,
> 
> John David Anglin wrote:
> 
>>>     0x411cc740 <_dl_make_fptr+112>: ldw,s r7(,r6),ret0
>>> in:
>>> r7 == 0x7c4
>>> r6 == 0x0
>>
>>
>>
>> r6 is wrong.  Find out why it is zero.
>>
> Far from being an expert, with help of ddd it seems that:
> ElfW(Addr)
> _dl_make_fptr (struct link_map *map, const ElfW(Sym) *sym,
>                ElfW(Addr) ip)
> {
>   ElfW(Addr) *ftab = map->l_mach.fptr_table;    <====[2]
> 
> (Elf32_Addr *)fptr_table == (Elf32_Addr *) 0x0
> 
> (the same for gcc-3.3 ;) )
> 
> is:
> Dump of assembler code from 0x411e371c to 0x411e381c:
>     0x411e371c <_dl_make_fptr+76>:  ldw 1fc(,r26),r6 (r6 == 0x0)
> 
> the weird stuff his in fact here:
> 
>   if (__builtin_expect (ftab == NULL, 0))
>     ftab = make_fptr_table (map);
> 
> with gcc-3.3 the register (r7) (which seems to me contains the value 
> pointed by ftab) is well the one addressed by map->l_mach.fptr_table ie 
> map->l_mach.fptr_table == 0x40001000 (and btw map->l_mach.fptr_table_len 
> == 2067)
> 
> OTC with gcc-3.4 the register (r6) after the 'call' of the inlined 
> make_fptr_table() is restored to its starting value i.e.: 0x0
> eventhought that map->l_mach.fptr_table == 0x40001000 (and btw 
> map->l_mach.fptr_table_len == 2067) exactly the same as gcc-3.3.
> 
> duno if it could help:
> for gcc-3.3 the text is:
> Dump of assembler code from 0x412630d0 to 0x412631d0:
>     0x412630d0 <_dl_make_fptr+44>:  ldw 1fc(,r26),r7    <====[2]
>     0x412630d4 <_dl_make_fptr+48>:  copy r26,r8
>     0x412630d8 <_dl_make_fptr+52>:  cmpib,= 0,r7,0x412631a0 
> <_dl_make_fptr+252>    <===='call' make_fptr_table()
>     0x412630dc <_dl_make_fptr+56>:  copy r25,r3
>     0x412630e0 <_dl_make_fptr+60>:  ldw 30(,r8),r20
>     0x412630e4 <_dl_make_fptr+64>:  ldw 1f8(,r8),r22
>     0x412630e8 <_dl_make_fptr+68>:  ldw 4(,r20),r21
>     0x412630ec <_dl_make_fptr+72>:  sub r3,r21,r21
>     0x412630f0 <_dl_make_fptr+76>:  extrw,s r21,27,28,r21
>     0x412630f4 <_dl_make_fptr+80>:  cmpb,<<= r22,r21,0x41263184 
> <_dl_make_fptr+224>
>     0x412630f8 <_dl_make_fptr+84>:  depw,z r21,29,30,r9
>     0x412630fc <_dl_make_fptr+88>:  add,l r9,r7,r21
>     0x41263100 <_dl_make_fptr+92>:  ldw 0(,r21),r20
>     0x41263104 <_dl_make_fptr+96>:  cmpib,<> 0,r20,0x41263150 
> <_dl_make_fptr+172>
>     0x41263108 <_dl_make_fptr+100>: copy r21,r3
>     0x4126310c <_dl_make_fptr+104>: copy r21,r6
>     0x41263110 <_dl_make_fptr+108>: addil 0,r19,%r1
>     0x41263114 <_dl_make_fptr+112>: ldw 5dc(,r1),r5
>     0x41263118 <_dl_make_fptr+116>: ldw 24(,r8),r20
>     0x4126311c <_dl_make_fptr+120>: copy r19,r4
>     0x41263120 <_dl_make_fptr+124>: copy r10,r26
>     0x41263124 <_dl_make_fptr+128>: b,l 0x41262fc4 <make_fdesc>,rp
>     0x41263128 <_dl_make_fptr+132>: ldw 4(,r20),r25
>     0x4126312c <_dl_make_fptr+136>: ldw 0(,r3),r20
>     0x41263130 <_dl_make_fptr+140>: cmpib,= 0,r20,0x4126317c 
> <_dl_make_fptr+216>
>     0x41263134 <_dl_make_fptr+144>: copy r4,r19
>     0x41263138 <_dl_make_fptr+148>: ldw 4(,r5),r20
>     0x4126313c <_dl_make_fptr+152>: stw r20,0(,ret0)
>     0x41263140 <_dl_make_fptr+156>: stw ret0,4(,r5)
>     0x41263144 <_dl_make_fptr+160>: ldw 0(,r6),r20
>     0x41263148 <_dl_make_fptr+164>: cmpib,=,n 0,r20,0x4126311c 
> <_dl_make_fptr+120>
>     0x4126314c <_dl_make_fptr+168>: ldw 24(,r8),r20
>     0x41263150 <_dl_make_fptr+172>: ldw r7(,r9),ret0
>     0x41263154 <_dl_make_fptr+176>: ldw -94(,sp),rp
>     0x41263158 <_dl_make_fptr+180>: ldw -7c(,sp),r9
>     0x4126315c <_dl_make_fptr+184>: ldw -78(,sp),r8
>     0x41263160 <_dl_make_fptr+188>: ldw -74(,sp),r7
>     0x41263164 <_dl_make_fptr+192>: ldw -70(,sp),r6
>     0x41263168 <_dl_make_fptr+196>: ldw -6c(,sp),r5
>     0x4126316c <_dl_make_fptr+200>: ldw -68(,sp),r4
>     0x41263170 <_dl_make_fptr+204>: ldw -64(,sp),r3
>     0x41263174 <_dl_make_fptr+208>: bv r0(rp)
>     0x41263178 <_dl_make_fptr+212>: ldw,mb -80(,sp),r10
>     0x4126317c <_dl_make_fptr+216>: b,l 0x41263150 <_dl_make_fptr+172>,r0
>     0x41263180 <_dl_make_fptr+220>: stw ret0,0(,r3)
>     0x41263184 <_dl_make_fptr+224>: addil 0,r19,%r1
>     0x41263188 <_dl_make_fptr+228>: ldi 0,r26
>     0x4126318c <_dl_make_fptr+232>: ldw 5e4(,r1),r1
>     0x41263190 <_dl_make_fptr+236>: copy r1,r23
>     0x41263194 <_dl_make_fptr+240>: ldi 0,r25
>     0x41263198 <_dl_make_fptr+244>: b,l 0x4125e4f8 <_dl_signal_error>,rp
>     0x4126319c <_dl_make_fptr+248>: ldi 0,r24
>     0x412631a0 <_dl_make_fptr+252>: ldw 2c(,r26),r21        <==== 
> map->l_mach.fptr_table()
>     0x412631a4 <_dl_make_fptr+256>: ldw 30(,r26),r20
>     0x412631a8 <_dl_make_fptr+260>: addil 0,r19,%r1
>     0x412631ac <_dl_make_fptr+264>: copy r19,r4
>     0x412631b0 <_dl_make_fptr+268>: ldw 4(,r20),r22
>     0x412631b4 <_dl_make_fptr+272>: ldw 4(,r21),r26
>     0x412631b8 <_dl_make_fptr+276>: ldi 3,r24
>     0x412631bc <_dl_make_fptr+280>: ldi 12,r23
>     0x412631c0 <_dl_make_fptr+284>: ldw 44(,r8),r21
>     0x412631c4 <_dl_make_fptr+288>: sub r26,r22,r26
>     0x412631c8 <_dl_make_fptr+292>: ldw 654(,r1),r1
>     0x412631cc <_dl_make_fptr+296>: ldw 4(,r21),r25
>     0x412631d0 <_dl_make_fptr+300>: ldw 4(,r1),r20
>     0x412631d4 <_dl_make_fptr+304>: ldi -1,r21
>     0x412631d8 <_dl_make_fptr+308>: b,l 0x41265570 <$$divU>,r31
>     0x412631dc <_dl_make_fptr+312>: sub r0,r20,r22
>     0x412631e0 <_dl_make_fptr+316>: stw r21,-34(,sp)
>     0x412631e4 <_dl_make_fptr+320>: ldi 0,r26
>     0x412631e8 <_dl_make_fptr+324>: depw,z ret1,29,30,r5
>     0x412631ec <_dl_make_fptr+328>: stw r0,-38(,sp)
>     0x412631f0 <_dl_make_fptr+332>: copy ret1,r6
>     0x412631f4 <_dl_make_fptr+336>: add,l r5,r20,r20
>     0x412631f8 <_dl_make_fptr+340>: add,l r20,r21,r20
>     0x412631fc <_dl_make_fptr+344>: and r20,r22,r20
>     0x41263200 <_dl_make_fptr+348>: b,l 0x412641bc <__mmap>,rp
>     0x41263204 <_dl_make_fptr+352>: copy r20,r25
>     0x41263208 <_dl_make_fptr+356>: copy r4,r19
>     0x4126320c <_dl_make_fptr+360>: cmpib,= -1,ret0,0x4126323c 
> <_dl_make_fptr+408>
>     0x41263210 <_dl_make_fptr+364>: copy ret0,r26
>     0x41263214 <_dl_make_fptr+368>: ldw 1fc(,r8),r20
>     0x41263218 <_dl_make_fptr+372>: cmpib,<>,n 0,r20,0x4126322c 
> <_dl_make_fptr+392>
>     0x4126321c <_dl_make_fptr+376>: stw ret0,1fc(,r8)
>     0x41263220 <_dl_make_fptr+380>: stw r6,1f8(,r8)
>     0x41263224 <_dl_make_fptr+384>: b,l 0x412630e0 <_dl_make_fptr+60>,r0
>     0x41263228 <_dl_make_fptr+388>: ldw 1fc(,r8),r7    <==== return 
> map->l_mach.fptr_table;
>     0x4126322c <_dl_make_fptr+392>: b,l 0x4126421c <munmap>,rp
>     0x41263230 <_dl_make_fptr+396>: copy r5,r25
>     0x41263234 <_dl_make_fptr+400>: b,l 0x41263224 <_dl_make_fptr+384>,r0
>     0x41263238 <_dl_make_fptr+404>: copy r4,r19
>     0x4126323c <_dl_make_fptr+408>: addil 0,r4,%r1
>     0x41263240 <_dl_make_fptr+412>: copy r1,r20
>     0x41263244 <_dl_make_fptr+416>: ldw 62c(,r20),r20
>     0x41263248 <_dl_make_fptr+420>: ldw 0(,r20),r26
>     0x4126324c <_dl_make_fptr+424>: addil 0,r4,%r1
>     0x41263250 <_dl_make_fptr+428>: ldw 5e8(,r1),r21
>     0x41263254 <_dl_make_fptr+432>: b,l 0x41263194 <_dl_make_fptr+240>,r0
>     0x41263258 <_dl_make_fptr+436>: copy r21,r23
>  [...]
> 
> and for gcc-3.4:
> Dump of assembler code from 0x4128571c to 0x4128581c:
>     0x4128571c <_dl_make_fptr+76>:  ldw 1fc(,r26),r6    <====[2]
>     0x41285720 <_dl_make_fptr+80>:  cmpib,= 0,r6,0x412858f4 
> <_dl_make_fptr+548>    <===='call' make_fptr_table()
>     0x41285724 <_dl_make_fptr+84>:  copy r25,r3
>     0x41285728 <_dl_make_fptr+88>:  ldw 1f8(,r26),ret1
>     0x4128572c <_dl_make_fptr+92>:  ldw 30(,r10),r21
>     0x41285730 <_dl_make_fptr+96>:  ldw 4(,r21),r20
>     0x41285734 <_dl_make_fptr+100>: sub r3,r20,r20
>     0x41285738 <_dl_make_fptr+104>: extrw,s r20,27,28,r7
>     0x4128573c <_dl_make_fptr+108>: cmpb,>>=,n r7,ret1,0x412859d0 
> <_dl_make_fptr+768>
>     0x41285740 <_dl_make_fptr+112>: ldw,s r7(,r6),ret0
>     0x41285744 <_dl_make_fptr+116>: cmpib,<> 0,ret0,0x412857c8 
> <_dl_make_fptr+248>
>     0x41285748 <_dl_make_fptr+120>: addil 0,r19,%r1
>     0x4128574c <_dl_make_fptr+124>: depw,z r7,29,30,r11
>     0x41285750 <_dl_make_fptr+128>: ldw 638(,r1),r13
>     0x41285754 <_dl_make_fptr+132>: addil 0,r19,%r1
>     0x41285758 <_dl_make_fptr+136>: ldw 5c0(,r1),r5
>     0x4128575c <_dl_make_fptr+140>: addil 0,r19,%r1
>     0x41285760 <_dl_make_fptr+144>: ldo -78(sp),r14
>     0x41285764 <_dl_make_fptr+148>: ldw 610(,r1),r16
>     0x41285768 <_dl_make_fptr+152>: add,l r11,r6,r15
>     0x4128576c <_dl_make_fptr+156>: copy r5,r9
>     0x41285770 <_dl_make_fptr+160>: ldw 24(,r10),r20
>     0x41285774 <_dl_make_fptr+164>: ldw 4(,r20),r8
>     0x41285778 <_dl_make_fptr+168>: ldw 0(,r5),r3
>     0x4128577c <_dl_make_fptr+172>: ldw 4(,r3),r23
>     0x41285780 <_dl_make_fptr+176>: ldw 8(,r3),r20
>     0x41285784 <_dl_make_fptr+180>: cmpb,>>= r20,r23,0x4128580c 
> <_dl_make_fptr+316>
>     0x41285788 <_dl_make_fptr+184>: ldo 1(r20),r22
>     0x4128578c <_dl_make_fptr+188>: ldw 8(,r3),r21
>     0x41285790 <_dl_make_fptr+192>: cmpb,<> r20,r21,0x41285780 
> <_dl_make_fptr+176>
>     0x41285794 <_dl_make_fptr+196>: shladd,l r21,3,r3,r20
>     0x41285798 <_dl_make_fptr+200>: stw r22,8(,r3)
>     0x4128579c <_dl_make_fptr+204>: ldo c(r20),r26
>     0x412857a0 <_dl_make_fptr+208>: stw r8,4(,r26)
>     0x412857a4 <_dl_make_fptr+212>: stw r12,0(,r26)
>     0x412857a8 <_dl_make_fptr+216>: ldw r11(,r6),r20
>     0x412857ac <_dl_make_fptr+220>: cmpib,=,n 0,r20,0x412858a8 
> <_dl_make_fptr+472>
>     0x412857b0 <_dl_make_fptr+224>: ldw 4(,r9),r20
>     0x412857b4 <_dl_make_fptr+228>: stw r20,0(,r26)
>     0x412857b8 <_dl_make_fptr+232>: stw r26,4(,r9)
>     0x412857bc <_dl_make_fptr+236>: ldw,s r7(,r6),ret0
>     0x412857c0 <_dl_make_fptr+240>: cmpib,=,n 0,ret0,0x41285774 
> <_dl_make_fptr+164>
>     0x412857c4 <_dl_make_fptr+244>: ldw 24(,r10),r20
>     0x412857c8 <_dl_make_fptr+248>: ldw -94(,sp),rp
>     0x412857cc <_dl_make_fptr+252>: ldw -74(,sp),r16
>     0x412857d0 <_dl_make_fptr+256>: ldw -70(,sp),r15
>     0x412857d4 <_dl_make_fptr+260>: ldw -6c(,sp),r14
>     0x412857d8 <_dl_make_fptr+264>: ldw -68(,sp),r13
>     0x412857dc <_dl_make_fptr+268>: ldw -64(,sp),r12
>     0x412857e0 <_dl_make_fptr+272>: ldw -60(,sp),r11
>     0x412857e4 <_dl_make_fptr+276>: ldw -5c(,sp),r10
>     0x412857e8 <_dl_make_fptr+280>: ldw -58(,sp),r9
>     0x412857ec <_dl_make_fptr+284>: ldw -54(,sp),r8
>     0x412857f0 <_dl_make_fptr+288>: ldw -50(,sp),r7
>     0x412857f4 <_dl_make_fptr+292>: ldw -4c(,sp),r6
>     0x412857f8 <_dl_make_fptr+296>: ldw -48(,sp),r5
>     0x412857fc <_dl_make_fptr+300>: ldw -44(,sp),r4
>     0x41285800 <_dl_make_fptr+304>: ldw -40(,sp),r3
>     0x41285804 <_dl_make_fptr+308>: bv r0(rp)
>     0x41285808 <_dl_make_fptr+312>: ldo -80(sp),sp
>     0x4128580c <_dl_make_fptr+316>: ldw 4(,r5),r20
>     0x41285810 <_dl_make_fptr+320>: cmpib,<>,n 0,r20,0x41285984 
> <_dl_make_fptr+692>
>     0x41285814 <_dl_make_fptr+324>: ldw 8(,r5),r21
>     0x41285818 <_dl_make_fptr+328>: depw,z r21,30,31,r20
> 
> Dump of assembler code from 0x412858f4 to 0x412859f4:
>     0x412858f4 <_dl_make_fptr+548>: ldw 30(,r26),r20    <==== 
> map->l_mach.fptr_table()
>     0x412858f8 <_dl_make_fptr+552>: ldw 4(,r20),r21
>     0x412858fc <_dl_make_fptr+556>: addil 0,r19,%r1
>     0x41285900 <_dl_make_fptr+560>: copy r1,r22
>     0x41285904 <_dl_make_fptr+564>: ldw 2c(,r26),r20
>     0x41285908 <_dl_make_fptr+568>: ldw 4(,r20),r26
>     0x4128590c <_dl_make_fptr+572>: sub r26,r21,r26
>     0x41285910 <_dl_make_fptr+576>: ldw 44(,r10),r20
>     0x41285914 <_dl_make_fptr+580>: ldw 4(,r20),r25
>     0x41285918 <_dl_make_fptr+584>: b,l 0x41287d60 <$$divU>,r31
>     0x4128591c <_dl_make_fptr+588>: copy r19,r4
>     0x41285920 <_dl_make_fptr+592>: ldi -1,r20
>     0x41285924 <_dl_make_fptr+596>: stw r20,-34(,sp)
>     0x41285928 <_dl_make_fptr+600>: ldi 0,r26
>     0x4128592c <_dl_make_fptr+604>: ldw 638(,r22),r20
>     0x41285930 <_dl_make_fptr+608>: ldw 4(,r20),r25
>     0x41285934 <_dl_make_fptr+612>: depw,z ret1,29,30,r5
>     0x41285938 <_dl_make_fptr+616>: ldi 3,r24
>     0x4128593c <_dl_make_fptr+620>: sub r0,r25,r20
>     0x41285940 <_dl_make_fptr+624>: copy ret1,r6
>     0x41285944 <_dl_make_fptr+628>: stw r0,-38(,sp)
>     0x41285948 <_dl_make_fptr+632>: add,l r5,r25,r25
>     0x4128594c <_dl_make_fptr+636>: ldi 12,r23
>     0x41285950 <_dl_make_fptr+640>: ldo -1(r25),r25
>     0x41285954 <_dl_make_fptr+644>: b,l 0x412869a8 <__mmap>,rp
>     0x41285958 <_dl_make_fptr+648>: and r25,r20,r25
>     0x4128595c <_dl_make_fptr+652>: copy r4,r19
>     0x41285960 <_dl_make_fptr+656>: cmpib,= -1,ret0,0x412859e0 
> <_dl_make_fptr+784>
>     0x41285964 <_dl_make_fptr+660>: copy ret0,r26
>     0x41285968 <_dl_make_fptr+664>: ldw 1fc(,r10),r20
>     0x4128596c <_dl_make_fptr+668>: cmpib,<>,n 0,r20,0x412859a0 
> <_dl_make_fptr+720>
>     0x41285970 <_dl_make_fptr+672>: copy r6,ret1
>     0x41285974 <_dl_make_fptr+676>: stw r6,1f8(,r10)
>     0x41285978 <_dl_make_fptr+680>: ldw 1fc(,r10),r6
>     0x4128597c <_dl_make_fptr+684>: b,l 0x4128572c <_dl_make_fptr+92>,r0
>     0x41285980 <_dl_make_fptr+688>: stw ret0,1fc(,r10)    <==== return 
> map->l_mach.fptr_table;
>     0x41285984 <_dl_make_fptr+692>: copy r20,r26
>     0x41285988 <_dl_make_fptr+696>: ldw 0(,r20),r20
>     0x4128598c <_dl_make_fptr+700>: b,l 0x412857a0 <_dl_make_fptr+208>,r0
>     0x41285990 <_dl_make_fptr+704>: stw r20,4(,r5)
>     0x41285994 <_dl_make_fptr+708>: stw ret0,0(,r5)
>     0x41285998 <_dl_make_fptr+712>: b,l 0x412857a0 <_dl_make_fptr+208>,r0
>     0x4128599c <_dl_make_fptr+716>: ldo c(ret0),r26
>     0x412859a0 <_dl_make_fptr+720>: b,l 0x41286a04 <munmap>,rp
>     0x412859a4 <_dl_make_fptr+724>: copy r5,r25
>     0x412859a8 <_dl_make_fptr+728>: ldw 1f8(,r10),ret1
>     0x412859ac <_dl_make_fptr+732>: ldw 1fc(,r10),r6
>     0x412859b0 <_dl_make_fptr+736>: b,l 0x4128572c <_dl_make_fptr+92>,r0
>     0x412859b4 <_dl_make_fptr+740>: copy r4,r19
>     0x412859b8 <_dl_make_fptr+744>: addil 0,r4,%r1
>     0x412859bc <_dl_make_fptr+748>: ldw 0(,r16),r26
>     0x412859c0 <_dl_make_fptr+752>: ldw 5c4(,r1),r23
>     0x412859c4 <_dl_make_fptr+756>: ldi 0,r25
>     0x412859c8 <_dl_make_fptr+760>: b,l 0x41280f10 <_dl_signal_error>,rp
>     0x412859cc <_dl_make_fptr+764>: ldi 0,r24
>     0x412859d0 <_dl_make_fptr+768>: addil 0,r19,%r1
>     0x412859d4 <_dl_make_fptr+772>: ldi 0,r26
>     0x412859d8 <_dl_make_fptr+776>: b,l 0x412859c4 <_dl_make_fptr+756>,r0
>     0x412859dc <_dl_make_fptr+780>: ldw 5c8(,r1),r23
>     0x412859e0 <_dl_make_fptr+784>: addil 0,r4,%r1
>     0x412859e4 <_dl_make_fptr+788>: ldw 610(,r1),r20
>     0x412859e8 <_dl_make_fptr+792>: ldw 0(,r20),r26
>     0x412859ec <_dl_make_fptr+796>: addil 0,r4,%r1
>     0x412859f0 <_dl_make_fptr+800>: b,l 0x412859c4 <_dl_make_fptr+756>,r0
> End of assembler dump.
> 
> I have to thought more on how to create a test case (all advise is 
> always well come :) )
> 
> Joel
> _______________________________________________
> parisc-linux mailing list
> parisc-linux@lists.parisc-linux.org
> http://lists.parisc-linux.org/mailman/listinfo/parisc-linux
> 
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^ permalink raw reply	[flat|nested] 10+ messages in thread
* [parisc-linux] Re: stay the same with gcc-3.4.2 :( [was: back to glibc-2.3.3 & gcc-3.4.1 pb]
  2004-09-11 18:22     ` [parisc-linux] stay the same with gcc-3.4.2 :( [was: back to glibc-2.3.3 & gcc-3.4.1 pb] Joel Soete
@ 2004-09-12 20:21       ` Joel Soete
  0 siblings, 0 replies; 10+ messages in thread
From: Joel Soete @ 2004-09-12 20:21 UTC (permalink / raw)
  To: John David Anglin, Carlos O'Donell; +Cc: parisc-linux

Hello all,

Continuing investigation:

>> Hello Dave,
>>
>> John David Anglin wrote:
>>
>>>>     0x411cc740 <_dl_make_fptr+112>: ldw,s r7(,r6),ret0
>>>> in:
>>>> r7 == 0x7c4
>>>> r6 == 0x0
>>>
>>>
>>>
>>>
>>> r6 is wrong.  Find out why it is zero.
>>>
>> Far from being an expert, with help of ddd it seems that:
>> ElfW(Addr)
>> _dl_make_fptr (struct link_map *map, const ElfW(Sym) *sym,
>>                ElfW(Addr) ip)
>> {
>>   ElfW(Addr) *ftab = map->l_mach.fptr_table;    <====[2]
>>
[...]
>> the weird stuff his in fact here:
>>
>>   if (__builtin_expect (ftab == NULL, 0))
>>     ftab = make_fptr_table (map);	<================[3]
>>
 >>   symtab = (const void *) D_PTR (map, l_info[DT_SYMTAB]);
 >>   symidx = sym - symtab;    <=========================[1]
 >>
 >>   if (symidx >= map->l_mach.fptr_table_len)
 >>     _dl_signal_error (0, NULL, NULL,
 >>                       N_("internal error: symidx out of range of fptr table"));
 >>
 >>   while (ftab[symidx] == 0)	<========================[4]

Finaly it seems that two things hapened wronly in gcc-3.4 at those tags [3] & [4]:
comparing side by side the asm form of this chunk:

gcc-3.3						| gcc-3.4
=======						| =======
ldw 1fc(,r26),r7				| ldw 1fc(,r26),r6	<====[2]
	ftab == r7 == 0x0			|	ftab == r6 == 0x0
						|
copy r26,r8					|
cmpib,= 0,r7,0x412631a0 <_dl_make_fptr+252>	| cmpib,= 0,r6,0x412858f4 <_dl_make_fptr+548>	<====[3]'call' make_fptr_table()
	r7 == 0x40001000			|	r6 == 0x0
						|
copy r25,r3					| copy r25,r3
ldw 30(,r8),r20					| ldw 1f8(,r26),ret1
ldw 1f8(,r8),r22				| ldw 30(,r10),r21
ldw 4(,r20),r21					| ldw 4(,r21),r20
						|
	r3 == 0x4026d1c4 (== sym)		|	r3 == 0x40037cdc (== sym);
	r21 == 0x40265164 (== symtab)		|	r20 == 0x4003009c (== symtab)
sub r3,r21,r21					| sub r3,r20,r20	<====[1]
	r21 == 0x8060				|	r20 == 0x7c40
						|
extrw,s r21,27,28,r21				| extrw,s r20,27,28,r7
	[== r21 >> 4]				|	[r7 = r20 >> 4]
	r21 == 0x806				|	r7 == 0x7c4
						|
	r22 == 0x813				|	ret1 (aka r29) == 0x7d1 (== map->l_mach.fptr_table_len)
	(r22 == map->l_mach.fptr_table_len)	|	(ret1 == map->l_mach.fptr_table_len)
cmpb,<<= r22,r21,0x41263184 <_dl_make_fptr+224>	| cmpb,>>=,n r7,ret1,0x412859d0 <_dl_make_fptr+768>
depw,z r21,29,30,r9				|
	[r9 = r21 << 2]				|
	r9 == 0x2018				|
						|
add,l r9,r7,r21					|
	r21 == 0x40003018			|
						|
ldw 0(,r21),r20					| ldw,s r7(,r6),ret0	<====[4] (i.e. ftab[symidx])
cmpib,<> 0,r20,0x41263150 <_dl_make_fptr+172>	| cmpib,<> 0,ret0,0x4104aa38 <_dl_make_fptr+248>

Here I agreed that the code could be (assuming that r6 == fatb) ldw,s r7(,r6),ret0 but need at least 'depw,z r7,29,30,r7' before

[...]
ldw 2c(,r26),r21				| ldw 30(,r26),r20	<==== make_fptr_table()
ldw 30(,r26),r20				| ldw 4(,r20),r21
addil 0,r19,%r1					| addil 0,r19,%r1
copy r19,r4					| copy r1,r22
ldw 4(,r20),r22					| ldw 2c(,r26),r20
ldw 4(,r21),r26					| ldw 4(,r20),r26
ldi 3,r24					| sub r26,r21,r26
ldi 12,r23					| ldw 44(,r10),r20
ldw 44(,r8),r21					| ldw 4(,r20),r25
sub r26,r22,r26					| b,l 0x41287d60 <$$divU>,r31
ldw 654(,r1),r1					| copy r19,r4
ldw 4(,r21),r25					| ldi -1,r20
ldw 4(,r1),r20					| stw r20,-34(,sp)
ldi -1,r21					| ldi 0,r26
b,l 0x41265570 <$$divU>,r31			| ldw 638(,r22),r20
sub r0,r20,r22					| ldw 4(,r20),r25
stw r21,-34(,sp)				| depw,z ret1,29,30,r5
ldi 0,r26					| ldi 3,r24
depw,z ret1,29,30,r5				| sub r0,r25,r20
stw r0,-38(,sp)					| copy ret1,r6
copy ret1,r6					| stw r0,-38(,sp)
add,l r5,r20,r20				| add,l r5,r25,r25
add,l r20,r21,r20				| ldi 12,r23
and r20,r22,r20					| ldo -1(r25),r25
b,l 0x412641bc <__mmap>,rp			| b,l 0x412869a8 <__mmap>,rp
copy r20,r25					| and r25,r20,r25
copy r4,r19					| copy r4,r19
cmpib,= -1,ret0,0x4126323c <_dl_make_fptr+408>	| cmpib,= -1,ret0,0x412859e0 <_dl_make_fptr+784>
copy ret0,r26					| copy ret0,r26
						|	(ret0 == 0x40001000)
ldw 1fc(,r8),r20				| ldw 1fc(,r10),r20
cmpib,<>,n 0,r20,0x4126322c <_dl_make_fptr+392>	| cmpib,<>,n 0,r20,0x412859a0 <_dl_make_fptr+720>
						| copy r6,ret1
						|	(ret1 == 0x815)
stw ret0,1fc(,r8)	(a)			| stw r6,1f8(,r10)	(d)
stw r6,1f8(,r8)		(b)			| ldw 1fc(,r10),r6	(e)		<==== ????
b,l 0x412630e0 <_dl_make_fptr+60>,r0		| b,l 0x4128572c <_dl_make_fptr+92>,r0
ldw 1fc(,r8),r7		(c)			| stw ret0,1fc(,r10)	(f)		<==== make_fptr_table()'s return

hmmm here I have the feeling that (d) (e) and (f) were wrongly re-ordered;
if they have the similar order as  (f) (d) and (e), r6 == ftab would be loaded by the right value 0x40001000?

That said I didn't reach to produce a test case reporducing that fact :(
Do you think that if I transmit those explanations (may be a bit completed for gcc-3.3 example) with the precompile (-E) code, it 
could be enough to fill in a br near gcc team?

TIA,
	Joel
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^ permalink raw reply	[flat|nested] 10+ messages in thread
[parent not found: <413B222D.8040601@tiscali.be>]
* Re: [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb
       [not found] <413B222D.8040601@tiscali.be>
@ 2004-09-06  2:47 ` John David Anglin
  2004-09-06 19:57   ` Carlos O'Donell
  2004-09-06  3:02 ` John David Anglin
  1 sibling, 1 reply; 10+ messages in thread
From: John David Anglin @ 2004-09-06  2:47 UTC (permalink / raw)
  To: Joel Soete; +Cc: parisc-linux

> > ../sysdeps/generic/unwind-dw2.c:1021: warning: 
> > 'fallback_frame_state_for' defined but not used
> > rtld.c:730: warning: implicit declaration of function 

This problem in serious and needs to be fixed.  The function
fallback_frame_state_for is needed.  It is only called from an asm and
gcc doesn't know about calls from asm's.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)
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^ permalink raw reply	[flat|nested] 10+ messages in thread
* Re: [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb
  2004-09-06  2:47 ` [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb John David Anglin
@ 2004-09-06 19:57   ` Carlos O'Donell
  0 siblings, 0 replies; 10+ messages in thread
From: Carlos O'Donell @ 2004-09-06 19:57 UTC (permalink / raw)
  To: John David Anglin; +Cc: parisc-linux

On Sun, Sep 05, 2004 at 10:47:57PM -0400, John David Anglin wrote:
> > > ../sysdeps/generic/unwind-dw2.c:1021: warning: 
> > > 'fallback_frame_state_for' defined but not used
> > > rtld.c:730: warning: implicit declaration of function 
> 
> This problem in serious and needs to be fixed.  The function
> fallback_frame_state_for is needed.  It is only called from an asm and
> gcc doesn't know about calls from asm's.

It will only become important the day we need dwarf2 compat.
That function is used as a fallback if 'frame_state_for' doesn't exist,
and if libgcc_s.so.1 doesn't include '__frame_state_for', in which case
we use a fallback onto the dwarf2 compat code in glibc.

In an sjlj environment fallback_frame_state_for just becomes abort if
the above tests fail, and hence there is an extra
fallback_frame_state_for that doesn't get used in the glibc build with
an sjlj compiler.

See libc/sysdeps/generic/framestate.c for the fixes I made to this file.

c.

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^ permalink raw reply	[flat|nested] 10+ messages in thread
* Re: [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb
       [not found] <413B222D.8040601@tiscali.be>
  2004-09-06  2:47 ` [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb John David Anglin
@ 2004-09-06  3:02 ` John David Anglin
  1 sibling, 0 replies; 10+ messages in thread
From: John David Anglin @ 2004-09-06  3:02 UTC (permalink / raw)
  To: Joel Soete; +Cc: parisc-linux

> > the weird in this last warning is that it's a very small fnct:
> > [...]
> > static inline void
> > __set_cr27(struct _pthread_descr_struct * cr27)
> > {
> >      asm(
> >                 "ble    0xe0(%%sr2, %%r0)\n\t"
> >         "copy    %0, %%r26"
> >      : : "r" (cr27) : "r26" );
> > }
> > [...]

There might be a bug in gcc's size estimate for asm's.  See the
subsection "Size of an @code{asm}" in the gcc manual.  This could be
checked with a small test program that tries to inline the above.

>     244  static inline pthread_descr thread_self (void) __attribute__
> ((const,always_inline));

This is correct.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)
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^ permalink raw reply	[flat|nested] 10+ messages in thread
* [parisc-linux] back to glibc-2.3.3 & gcc-3.4.1 pb
@ 2004-09-02 19:34 Joel Soete
       [not found] ` <20040903154019.GR32474@baldric.uwo.ca>
  0 siblings, 1 reply; 10+ messages in thread
From: Joel Soete @ 2004-09-02 19:34 UTC (permalink / raw)
  To: Carlos O'Donell, parisc-linux

Hello Carlos,

I co yesterday glibc cvs (ie 2004 09 01) and apply your patch 2004-08-24.
I install debian gcc-3.4.1-7 and the build of this the libc with this compiler failed :(

seems in _dl_make_fptr() I need much more work, ...

I so retry to build with gcc-3.3 (3.3.4-7 deb) and the build just finished with success, so I launch the check now (yes more then 
7h on a c110 ;).

That said, it's the first time that I compare configure log and notice some differences, excepted :
@@ -26,8 +26,8 @@
  checking for ld... ld
  checking version of ld... 2.15, ok
  checking for pwd... /bin/pwd
-checking for hppa-linux-gcc... (cached) /usr/bin/gcc-3.4
-checking version of /usr/bin/gcc-3.4... 3.4.1, ok
+checking for hppa-linux-gcc... (cached) hppa-linux-gcc
+checking version of hppa-linux-gcc... 3.3.4, ok
  checking for gnumake... no
  checking for gmake... no
  checking for make... make

To help to read - as related to 3.4 and + with 3.3 (and yes unstable so binutils 2.15)

@@ -78,7 +78,7 @@
  checking for -z combreloc... no
  checking for -z execstack... yes
  checking for -fpie... no
-checking for -fno-unit-at-a-time... yes
+checking for -fno-unit-at-a-time... no
  checking whether cc puts quotes around section names... no
  checking for assembler .weak directive... yes
  checking for assembler line separator... !
@@ -89,7 +89,7 @@
  checking for DWARF2 unwind info support... no_registry_needed
  checking for __builtin_expect... yes
  checking for __builtin_memset... no
-checking for redirection of built-in functions... yes
+checking for redirection of built-in functions... no
  checking for local label subtraction... yes
  checking for __thread... no
  checking for libgd... no

Is it usefull to try to force gcc-3.4 to work without -fno-unit-at-a-time and (even though I don't know yet how) without 
'redirection of built-in functions' (even thought according to patch description: 
<http://gcc.gnu.org/ml/gcc-patches/2003-04/msg02045.html> this last one is supposed to help glibc build?)

TIA for advise,
	Joel
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^ permalink raw reply	[flat|nested] 10+ messages in thread
[parent not found: <20040903154019.GR32474@baldric.uwo.ca>]
[parent not found: <4138B043.2020009@tiscali.be>]
[parent not found: <20040904162953.GE32474@baldric.uwo.ca>]
[parent not found: <413AE748.3030207@tiscali.be>]
[parent not found: <413AFB1F.7010407@tiscali.be>]
* [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb
       [not found]         ` <413AFB1F.7010407@tiscali.be>
@ 2004-09-06 20:03           ` Carlos O'Donell
  2004-09-06 20:26             ` Joel Soete
  0 siblings, 1 reply; 10+ messages in thread
From: Carlos O'Donell @ 2004-09-06 20:03 UTC (permalink / raw)
  To: Joel Soete; +Cc: parisc-linux


Joel,

> make[2]: *** [/space/jrso/parisc-linux/build/glibc/libio/tst-atime.out] 

This is new. Could you see why this is failing?

> make[2]: *** [/space/jrso/parisc-linux/build/glibc/posix/tst-waitid.out] 

This is a new one I'm working to fix.

c.

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^ permalink raw reply	[flat|nested] 10+ messages in thread
* [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb
  2004-09-06 20:03           ` [parisc-linux] " Carlos O'Donell
@ 2004-09-06 20:26             ` Joel Soete
  2004-09-06 22:02               ` Carlos O'Donell
  0 siblings, 1 reply; 10+ messages in thread
From: Joel Soete @ 2004-09-06 20:26 UTC (permalink / raw)
  To: Carlos O'Donell; +Cc: parisc-linux



Carlos O'Donell wrote:
> Joel,
> 
> 
>>make[2]: *** [/space/jrso/parisc-linux/build/glibc/libio/tst-atime.out] 
> 
> 
> This is new. Could you see why this is failing?
> 
"atime has not changed"

mmm may be that's logical:
/dev/sda3		/		xfs		noatime			

hth,
	Joel
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^ permalink raw reply	[flat|nested] 10+ messages in thread
* [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb
  2004-09-06 20:26             ` Joel Soete
@ 2004-09-06 22:02               ` Carlos O'Donell
  0 siblings, 0 replies; 10+ messages in thread
From: Carlos O'Donell @ 2004-09-06 22:02 UTC (permalink / raw)
  To: Joel Soete; +Cc: parisc-linux

On Mon, Sep 06, 2004 at 08:26:57PM +0000, Joel Soete wrote:
> "atime has not changed"
> 
> mmm may be that's logical:
> /dev/sda3		/		xfs		noatime		 
> 

Yes. That is the reason for the failure.

c.

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^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2004-09-12 20:21 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
     [not found] <413B3845.1050302@tiscali.be>
     [not found] ` <200409060239.i862dAh2001466@hiauly1.hia.nrc.ca>
2004-09-06 19:58   ` [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb Carlos O'Donell
2004-09-06 21:49   ` Joel Soete
2004-09-11 18:22     ` [parisc-linux] stay the same with gcc-3.4.2 :( [was: back to glibc-2.3.3 & gcc-3.4.1 pb] Joel Soete
2004-09-12 20:21       ` [parisc-linux] " Joel Soete
     [not found] <413B222D.8040601@tiscali.be>
2004-09-06  2:47 ` [parisc-linux] Re: back to glibc-2.3.3 & gcc-3.4.1 pb John David Anglin
2004-09-06 19:57   ` Carlos O'Donell
2004-09-06  3:02 ` John David Anglin
2004-09-02 19:34 [parisc-linux] " Joel Soete
     [not found] ` <20040903154019.GR32474@baldric.uwo.ca>
     [not found]   ` <4138B043.2020009@tiscali.be>
     [not found]     ` <20040904162953.GE32474@baldric.uwo.ca>
     [not found]       ` <413AE748.3030207@tiscali.be>
     [not found]         ` <413AFB1F.7010407@tiscali.be>
2004-09-06 20:03           ` [parisc-linux] " Carlos O'Donell
2004-09-06 20:26             ` Joel Soete
2004-09-06 22:02               ` Carlos O'Donell

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