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Add fold-program-code to (system vm disassembler)

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* module/system/vm/disassembler.scm (fold-code-range): New helper.
  (fold-program-code): New interface.
This commit is contained in:
Andy Wingo 2013-11-08 15:58:27 +01:00
parent 5af36584d8
commit 850e80dacc
1 changed files with 66 additions and 0 deletions
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66
module/system/vm/disassembler.scm
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@ -32,6 +32,7 @@
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-4)
#:export (disassemble-program
fold-program-code
disassemble-image
disassemble-file))
@ -362,6 +363,71 @@ address of that offset."
(format port "Debugging information unavailable.~%")))
(values))
(define (fold-code-range proc seed bv start end context raw?)
(define (cook code offset)
(define (reference-scm target)
(unpack-scm (u32-offset->addr (+ offset target) context)))
(define (dereference-scm target)
(let ((addr (u32-offset->addr (+ offset target)
context)))
(pointer->scm
(dereference-pointer (make-pointer addr)))))
(match code
(((or 'make-short-immediate 'make-long-immediate) dst imm)
`(,(car code) ,dst ,(unpack-scm imm)))
(('make-long-long-immediate dst high low)
`(make-long-long-immediate ,dst
,(unpack-scm (logior (ash high 32) low))))
(('make-closure dst target nfree)
`(make-closure ,dst
,(u32-offset->addr (+ offset target) context)
,nfree))
(('make-non-immediate dst target)
`(make-non-immediate ,dst ,(reference-scm target)))
(('builtin-ref dst idx)
`(builtin-ref ,dst ,(builtin-index->name idx)))
(((or 'static-ref 'static-set!) dst target)
`(,(car code) ,dst ,(dereference-scm target)))
(('toplevel-box dst var-offset mod-offset sym-offset bound?)
`(toplevel-box ,dst
,(dereference-scm var-offset)
,(dereference-scm mod-offset)
,(dereference-scm sym-offset)
,bound?))
(('module-box dst var-offset mod-name-offset sym-offset bound?)
(let ((mod-name (reference-scm mod-name-offset)))
`(module-box ,dst
,(dereference-scm var-offset)
,(car mod-name)
,(cdr mod-name)
,(dereference-scm sym-offset)
,bound?)))
(_ code)))
(let lp ((offset start) (seed seed))
(cond
((< offset end)
(call-with-values (lambda () (disassemble-one bv offset))
(lambda (len elt)
(lp (+ offset len)
(proc (if raw? elt (cook elt offset))
seed)))))
(else seed))))
(define* (fold-program-code proc seed program-or-addr #:key raw?)
(cond
((find-program-debug-info (if (rtl-program? program-or-addr)
(rtl-program-code program-or-addr)
program-or-addr))
=> (lambda (pdi)
(fold-code-range proc seed
(program-debug-info-image pdi)
(program-debug-info-u32-offset pdi)
(program-debug-info-u32-offset-end pdi)
(program-debug-info-context pdi)
raw?)))
(else seed)))
(define* (disassemble-image bv #:optional (port (current-output-port)))
(let* ((ctx (debug-context-from-image bv))
(base (debug-context-text-base ctx)))