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fix Mach-O updating in the case that no two-level hints entry is available

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svn: r8136
This commit is contained in:
Matthew Flatt 2007-12-27 12:07:12 +00:00
parent 5df53fbe76
commit d411eb6402
1 changed files with 18 additions and 10 deletions
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28
collects/compiler/private/mach-o.ss
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@ -37,10 +37,10 @@
(let* ([cnt (read-ulong p)]
[cmdssz (read-ulong p)]
[min-used (round-up-page cmdssz)]
[sym-tab-pos 0]
[dysym-pos 0]
[hints-pos 0]
[link-edit-pos 0]
[sym-tab-pos #f]
[dysym-pos #f]
[hints-pos #f]
[link-edit-pos #f]
[link-edit-addr 0]
[link-edit-offset 0]
[link-edit-len 0])
@ -134,12 +134,19 @@
(write-ulong 0 out)
(write-ulong 4 out) ; 4 means SG_NORELOC
;; Shift command positions
(unless sym-tab-pos
(error 'mach-o "symtab position not found"))
(when (sym-tab-pos . > . link-edit-pos)
(set! sym-tab-pos (+ sym-tab-pos 56)))
(unless dysym-pos
(error 'mach-o "dysym position not found"))
(when (dysym-pos . > . link-edit-pos)
(set! dysym-pos (+ dysym-pos 56)))
(when (hints-pos . > . link-edit-pos)
(set! hints-pos (+ hints-pos 56)))
(when hints-pos
(when (hints-pos . > . link-edit-pos)
(set! hints-pos (+ hints-pos 56))))
(unless link-edit-pos
(error 'mach-o "link-edit position not found"))
(set! link-edit-pos (+ link-edit-pos 56))
(when move-link-edit?
;; Update link-edit segment entry:
@ -170,10 +177,11 @@
(write-ulong (+ offset outlen) out))))
'(32 40 48 56 64 72))
;; Shift hints pointer:
(file-position p (+ hints-pos 8))
(let ([hints-offset (read-ulong p)])
(file-position out (+ hints-pos 8))
(write-ulong (+ hints-offset outlen) out)))
(when hints-pos
(file-position p (+ hints-pos 8))
(let ([hints-offset (read-ulong p)])
(file-position out (+ hints-pos 8))
(write-ulong (+ hints-offset outlen) out))))
;; Write segdata to former link-data offset:
(file-position out out-offset)
(display segdata out)