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lzma PackLinuxElf64amd works!
This commit is contained in:
John Reiser
parent
3843ec1e02
commit
7185358b98
File diff suppressed because it is too large
Load Diff
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@ -73,7 +73,6 @@ ret_main:
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/* Returns 0 on success; non-zero on failure. */
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decompress: // (uchar const *src, size_t lsrc, uchar *dst, u32 &ldst, uint method)
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section NRV_COMMON
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/* Arguments according to calling convention */
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#define src %arg1
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#define lsrc %arg2
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@ -82,6 +81,13 @@ decompress: // (uchar const *src, size_t lsrc, uchar *dst, u32 &ldst, uint meth
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#define meth %arg5l
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#define methb %arg5b
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push %rbp; push %rbx // C callable
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push ldst
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push dst
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addq src,lsrc; push lsrc // &input_eof
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section NRV_COMMON
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/* Working registers */
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#define off %eax /* XXX: 2GB */
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#define len %ecx /* XXX: 2GB */
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@ -89,11 +95,6 @@ decompress: // (uchar const *src, size_t lsrc, uchar *dst, u32 &ldst, uint meth
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#define bits %ebx
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#define disp %rbp
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push %rbp; push %rbx // C callable
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push ldst
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push dst
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addq src,lsrc; push lsrc // &input_eof
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movq src,%rsi // hardware src for movsb, lodsb
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movq dst,%rdi // hardware dst for movsb
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xor bits,bits // empty; force refill
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@ -272,7 +273,7 @@ unfold:
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ret
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main:
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int3 # uncomment for debugging
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//// int3 # uncomment for debugging
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pop %rbp // &decompress
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movl -4-(ret_main - _start)(%rbp),%r15d // length which precedes stub
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subl $ sz_Ehdr + 2*sz_Phdr + sz_l_info + sz_p_info,%r15d
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@ -39,53 +39,56 @@ section LZMA_ELF00
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#define meth %arg5l /* %r8 */
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#define methb %arg5b
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// ELFMAINX has already done this for us:
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// pushq %rbp; push %rbx // C callable
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// pushq ldst
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// pushq dst
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// addq src,lsrc; push lsrc // &input_eof
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#define M_LZMA 14
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cmpb $ M_LZMA,methb; jne not_lzma
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// C calling convention
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pushq %rbp; movq %rsp,%rbp
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pushq %rbx
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pushq %rbp; movq %rsp,%rbp // we use alloca
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//LzmaDecode( // from lzmaSDK/C/7zip/Compress/LZMA_C/LzmaDecode.h
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// %arg1= &CLzmaDecoderState,
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// %arg2= in, %arg3l= inSize, %arg4= &inSizeProcessed,
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// %arg5= out, %arg6l= outSize, 8+%esp/ &outSizeProcessed
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// %arg5= out, %arg6l= outSize, arg7@ 8+%esp/ &outSizeProcessed
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//)
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movl (ldst),%arg6l // &outSize XXX: 4GB
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movq dst,%arg5 // outp
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movq lsrc,%arg3 // inSize
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leaq 2(src),%arg2; pushq %arg2 // in; save @-8(%rbp) for size calc at eof
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movb (src),%al; decl %arg3l // first byte, replaces LzmaDecodeProperties()
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movb %al,%cl // cl= ((lit_context_bits + lit_pos_bits)<<3) | pos_bits
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andb $7,%al // al= pos_bits
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shrb $3,%cl // cl= lit_context_bits + lit_pos_bits
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#define LZMA_BASE_SIZE 1846
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#define LZMA_LIT_SIZE 768
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#define szSizeT 8
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movq dst,%arg5 // outp
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movq lsrc,%arg3 // inSize
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movq src,%arg2 // in
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movq ldst,%r10
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lodsb; decl %arg3l // first byte, replaces LzmaDecodeProperties()
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movb %al,%cl // cl= ((lit_context_bits + lit_pos_bits)<<3) | pos_bits
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andb $6,%al // al= pos_bits
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shrb $3,%cl // cl= lit_context_bits + lit_pos_bits
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#define szSizeT 4
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movq $-LZMA_LIT_SIZE,%rbx
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shlq %cl,%rbx
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// inSizeProcessed, outSizeProcessed, *_bits, CLzmaDecoderState
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shlq %cl,%rbx; movb %al,%cl // %cl= pos_bits
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// alloca{inSizeProcessed, outSizeProcessed, *_bits, CLzmaDecoderState}
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leaq -(2*szSizeT +4) - 2*LZMA_BASE_SIZE(%rsp,%rbx,2), %rbx
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andq $~0<<6,%rbx // 64-byte align
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1:
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pushq $0
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pushq $0 // clera CLzmaDecoderState on stack
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cmpq %rbx,%rsp
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jne 1b
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pushq %rbx; addq $ szSizeT,%rbx // &outSizeProcessed
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movl (%r10),%arg6l // &outSize XXX: 4GB
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movq %rbx,%arg4; addq $ szSizeT,%rbx // &inSizeProcessed
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movb %al,2(%rbx) // store pos_bits
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lodsb; decl %arg3l // second byte, replaces LzmaDecodeProperties()
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movb %al,%cl // cl= (lit_pos_bits<<4) | lit_context_bits
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andb $0xf,%al; movb %al, (%rbx) // store lit_context_bits
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shrb $4, %cl; movb %cl,1(%rbx) // store lit_pos_bits
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pushq %rbx // &outSizeProcessed [arg7]
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leaq 2*szSizeT(%rbx),%arg1 // &CLzmaDecoderState
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movb -1(%arg2),%cl; decl %arg3l // second byte, replaces LzmaDecodeProperties()
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movb %al,2(%arg1) // store pos_bits
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movb %cl,%al // al= (lit_pos_bits<<4) | lit_context_bits
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shrb $4,%cl; movb %cl,1(%arg1) // store lit_pos_bits
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andb $0xf,%al; movb %al, (%arg1) // store lit_context_bits
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leaq -szSizeT(%arg1),%arg4 // &inSizeProcessed
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movq %rbx,%arg1 // &CLzmaDecoderState
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pushq %rax // return address slot (dummy CALL)
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section LZMA_DEC10
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@ -94,25 +97,12 @@ section LZMA_DEC10
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section LZMA_DEC20
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#include "lzma_d_cf.S"
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//
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// cleanup
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section LZMA_DEC30
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movl -1*szSizeT(%rbx),%eax; addq %rax,%rsi // inSizeProcessed
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movl -2*szSizeT(%rbx),%eax; addq %rax,%rdi // outSizeProcessed
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xorq %rax,%rax
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leaq -256(%rsp),%rcx
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movq %rbp,%rsp // restore stack
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1:
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pushq %rax
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cmpq %rcx,%rsp
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jne 1b
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movq -8(%rbp),%rbx
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xorq %rcx,%rcx
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leave
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movq -1*8(%rbp),%rsi // src [after header]
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movq 2*8(%rbp),%rdi // dst
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movl szSizeT(%rbx),%ecx; addq %rcx,%rsi // inSizeProcessed
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movl (%rbx),%edx; addq %rdx,%rdi // outSizeProcessed
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leave // movl %ebp,%rsp; popq %rbp
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not_lzma:
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// vi:ts=8:et
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