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Try to get the self-relocator to work with IPLTLSB relocations. Doesn't

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work right though - I can't figure out why.
This commit is contained in:
Doug Rabson 2001-10-24 20:14:49 +00:00
parent 888ef2d923
commit 88f5f7ac50
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=85436
4 changed files with 80 additions and 12 deletions
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3
sys/boot/efi/libefi/arch/ia64/ldscript.ia64
View File

@ -36,7 +36,7 @@ SECTIONS
*(COMMON)
}
. = ALIGN(4096);
__gp = ALIGN(8) + 0x200000;
__gp = .;
.sdata :
{
*(.got.plt)
@ -60,6 +60,7 @@ SECTIONS
*(.rela.stab)
*(.rela.ctors)
*(.relaset_*)
*(.rela.IA_64.pltoff)
}
. = ALIGN(4096);
.reloc : { *(.reloc) }

43
sys/boot/efi/libefi/arch/ia64/start.S
View File

@ -72,6 +72,7 @@
#define R_IA64_FPTR64LSB 0x47 /* word64 LSB @fptr(S + A) */
#define R_IA64_REL64MSB 0x6e /* word64 MSB BD + A */
#define R_IA64_REL64LSB 0x6f /* word64 LSB BD + A */
#define R_IA64_IPLTLSB 0x81 /* function descriptor LSB speciaal */
ENTRY(_start, 2)
alloc loc0=ar.pfs,2,3,3,0
@ -118,6 +119,9 @@ _start_plabel:
// in0: image base
// in1: system table
//
// This assumes that the pltrel section immediately follows
// the rela section.
STATIC_ENTRY(_reloc, 2)
alloc loc0=ar.pfs,2,2,2,0
mov loc1=rp
@ -129,6 +133,7 @@ STATIC_ENTRY(_reloc, 2)
add r15=r15,gp // relocate _DYNAMIC etc.
add r2=r2,gp
add r3=r3,gp
mov r19=0
;;
1: ld8 r16=[r15],8 // read r15->d_tag
;;
@ -143,7 +148,11 @@ STATIC_ENTRY(_reloc, 2)
;;
cmp.eq p6,p0=DT_RELASZ,r16
;;
(p6) mov r19=r17 // found rela size
(p6) add r19=r17,r19 // found rela size
;;
cmp.eq p6,p0=DT_PLTRELSZ,r16
;;
(p6) add r19=r17,r19 // found pltrel size
;;
cmp.eq p6,p0=DT_SYMTAB,r16
;;
@ -187,6 +196,12 @@ STATIC_ENTRY(_reloc, 2)
;;
(p6) br.cond.dptk.few 4f
;;
mov r24=R_IA64_IPLTLSB
;;
cmp.eq p6,p0=r24,r23
;;
(p6) br.cond.dptk.few 5f
;;
3: cmp.ltu p6,p0=0,r19 // more?
(p6) br.cond.dptk.few 2b // loop
@ -195,7 +210,7 @@ STATIC_ENTRY(_reloc, 2)
;;
br.cond.sptk.few 9f // done
4:
4: // DIR64LSB or REL64LSB
ld8 r16=[r15] // read value
;;
add r16=r16,in0 // relocate it
@ -203,14 +218,32 @@ STATIC_ENTRY(_reloc, 2)
st8 [r15]=r16 // and store it back
br.cond.sptk.few 3b
5:
extr.u r23=r16,32,32 // ELF64_R_SYM(r16)
5: // FPTR64LSB or IPLTLSB
extr.u r24=r16,32,32 // ELF64_R_SYM(r16)
;;
setf.sig f10=r23 // so we can multiply
setf.sig f10=r24 // so we can multiply
;;
xma.lu f10=f10,f9,f8 // f10=symtab + r_sym*syment
;;
getf.sig r16=f10
;;
mov r24=R_IA64_IPLTLSB
;;
cmp.ne p6,p0=r24,r23 // IPLTLSB doesn't need an @fptr
(p6) br.cond.sptk.few 6f
;;
add r16=8,r16 // address of st_value
;;
ld8 r16=[r16] // read symbol value
;;
add r16=r16,in0 // relocate symbol value
;;
st8 [r15]=r16,8 // update plt target
;;
st8 [r15]=gp // and gp
br.cond.sptk.few 3b
;;
6:
mov r8=EFI_BUFFER_TOO_SMALL // failure return value
;;
cmp.geu p6,p0=r2,r3 // space left?

3
sys/boot/ia64/efi/ldscript.ia64
View File

@ -36,7 +36,7 @@ SECTIONS
*(COMMON)
}
. = ALIGN(4096);
__gp = ALIGN(8) + 0x200000;
__gp = .;
.sdata :
{
*(.got.plt)
@ -60,6 +60,7 @@ SECTIONS
*(.rela.stab)
*(.rela.ctors)
*(.relaset_*)
*(.rela.IA_64.pltoff)
}
. = ALIGN(4096);
.reloc : { *(.reloc) }

43
sys/boot/ia64/efi/start.S
View File

@ -72,6 +72,7 @@
#define R_IA64_FPTR64LSB 0x47 /* word64 LSB @fptr(S + A) */
#define R_IA64_REL64MSB 0x6e /* word64 MSB BD + A */
#define R_IA64_REL64LSB 0x6f /* word64 LSB BD + A */
#define R_IA64_IPLTLSB 0x81 /* function descriptor LSB speciaal */
ENTRY(_start, 2)
alloc loc0=ar.pfs,2,3,3,0
@ -118,6 +119,9 @@ _start_plabel:
// in0: image base
// in1: system table
//
// This assumes that the pltrel section immediately follows
// the rela section.
STATIC_ENTRY(_reloc, 2)
alloc loc0=ar.pfs,2,2,2,0
mov loc1=rp
@ -129,6 +133,7 @@ STATIC_ENTRY(_reloc, 2)
add r15=r15,gp // relocate _DYNAMIC etc.
add r2=r2,gp
add r3=r3,gp
mov r19=0
;;
1: ld8 r16=[r15],8 // read r15->d_tag
;;
@ -143,7 +148,11 @@ STATIC_ENTRY(_reloc, 2)
;;
cmp.eq p6,p0=DT_RELASZ,r16
;;
(p6) mov r19=r17 // found rela size
(p6) add r19=r17,r19 // found rela size
;;
cmp.eq p6,p0=DT_PLTRELSZ,r16
;;
(p6) add r19=r17,r19 // found pltrel size
;;
cmp.eq p6,p0=DT_SYMTAB,r16
;;
@ -187,6 +196,12 @@ STATIC_ENTRY(_reloc, 2)
;;
(p6) br.cond.dptk.few 4f
;;
mov r24=R_IA64_IPLTLSB
;;
cmp.eq p6,p0=r24,r23
;;
(p6) br.cond.dptk.few 5f
;;
3: cmp.ltu p6,p0=0,r19 // more?
(p6) br.cond.dptk.few 2b // loop
@ -195,7 +210,7 @@ STATIC_ENTRY(_reloc, 2)
;;
br.cond.sptk.few 9f // done
4:
4: // DIR64LSB or REL64LSB
ld8 r16=[r15] // read value
;;
add r16=r16,in0 // relocate it
@ -203,14 +218,32 @@ STATIC_ENTRY(_reloc, 2)
st8 [r15]=r16 // and store it back
br.cond.sptk.few 3b
5:
extr.u r23=r16,32,32 // ELF64_R_SYM(r16)
5: // FPTR64LSB or IPLTLSB
extr.u r24=r16,32,32 // ELF64_R_SYM(r16)
;;
setf.sig f10=r23 // so we can multiply
setf.sig f10=r24 // so we can multiply
;;
xma.lu f10=f10,f9,f8 // f10=symtab + r_sym*syment
;;
getf.sig r16=f10
;;
mov r24=R_IA64_IPLTLSB
;;
cmp.ne p6,p0=r24,r23 // IPLTLSB doesn't need an @fptr
(p6) br.cond.sptk.few 6f
;;
add r16=8,r16 // address of st_value
;;
ld8 r16=[r16] // read symbol value
;;
add r16=r16,in0 // relocate symbol value
;;
st8 [r15]=r16,8 // update plt target
;;
st8 [r15]=gp // and gp
br.cond.sptk.few 3b
;;
6:
mov r8=EFI_BUFFER_TOO_SMALL // failure return value
;;
cmp.geu p6,p0=r2,r3 // space left?