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mipsel stub for mmap on Linux (not NetBSD); and subroutine arg[4..6]

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in t0..t2 instead of on stack, to match LMZA_DEC20
This commit is contained in:
John Reiser 2007-05-07 07:02:16 -07:00
parent 10a6370738
commit 9141a78c29
3 changed files with 576 additions and 577 deletions
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1096
src/stub/mipsel.r3000-linux.elf-entry.h
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File diff suppressed because it is too large Load Diff

43
src/stub/src/mipsel.r3000-linux.elf-entry.S
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@ -126,34 +126,33 @@ lxlzma_sv_sp = 10*4
lxlzma_dstdone = 8*4
lxlzma_srcdone = 7*4
lxlzma_pdstdone = 6*4
lxlzma_dstlen = 5*4
lxlzma_dst = 4*4
#define a4 t0
#define a5 t1
#define a6 t2
lbu t0,0(lxsrc) # ((lit_context_bits + lit_pos_bits)<<3) | pos_bits
lbu t9,0(lxsrc) # ((lit_context_bits + lit_pos_bits)<<3) | pos_bits
li tmp,-2*LZMA_LIT_NUM
lbu t1,1(lxsrc) # (lit_pos_bits<<4) | lit_context_bits
andi v0,t0,7 # pos_bits
srl t0,t0,3 # (lit_context_bits + lit_pos_bits)
sllv tmp,tmp,t0
lbu t8,1(lxsrc) # (lit_pos_bits<<4) | lit_context_bits
andi v0,t9,7 # pos_bits
srl t9,t9,3 # (lit_context_bits + lit_pos_bits)
sllv tmp,tmp,t9
addiu tmp,tmp,-4 - 2*LZMA_BASE_NUM - lxlzma_szframe
addu sp,sp,tmp # alloca
sw tmp, lxlzma_sv_sp(sp) # dynamic frame size
addiu tmp,sp,lxlzma_dstdone
sw lxdstlen,lxlzma_dstlen(sp)
sw lxdst, lxlzma_dst(sp)
sw tmp,lxlzma_sv_sp(sp) # dynamic frame size
addiu a6,sp,lxlzma_dstdone
sw ra, lxlzma_sv_pc(sp)
move a5,lxdstlen
move a4,lxdst
addiu a3,sp,lxlzma_srcdone
sw ra,lxlzma_sv_pc(sp)
addiu a2,lxsrclen,-2 # 2 header bytes
sw tmp, lxlzma_pdstdone(sp)
addiu a1,lxsrc,2 # 2 header bytes
addiu a0,sp,lxlzma_szframe # &CLzamDecoderState
sb v0,2(a0) # pos_bits
andi tmp,t1,0xf
sb tmp,0(a0) # lit_context_bits
srl t1,t1,4
sb v0,2(a0) # pos_bits
andi tmp,t8,0xf
sb tmp, 0(a0) # lit_context_bits
srl t8,t8,4
bal lzma_decode
sb t1,1(a0) # lit_pos_bits
sb t8,1(a0) # lit_pos_bits
lw ra,lxlzma_sv_pc(sp)
lw tmp,lxlzma_sv_sp(sp)
jr ra
@ -225,8 +224,8 @@ unfold: // s7= &decompress; s6= &b_info(fold); s5= sz_pack2
the brk() of the _un_compressed program. The address and length are pre-
calculated by PackLinuxElf64amd::defineSymbols().
*/
#define a4 0x10
#define a5 0x14
#define a4_sys 0x10
#define a5_sys 0x14
#define sp_frame 0x20
addiu sp,sp,-sp_frame
@ -234,7 +233,7 @@ unfold: // s7= &decompress; s6= &b_info(fold); s5= sz_pack2
li a2, PROT_READ | PROT_WRITE | PROT_EXEC
lw a1,lenm - decompressor(s7)
li a3, MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS
sw zero,a4(sp) //; sw zero,a5_mmap(sp) // MAP_ANON ==> ignore offset
sw zero,a4_sys(sp) //; sw zero,a5_sys(sp) // MAP_ANON ==> ignore offset
li v0,__NR_mmap; syscall; bnez a3,err_syscall
move a0,v0 // &new page(s)

14
src/stub/tmp/mipsel.r3000-linux.elf-entry.bin.dump
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@ -6,13 +6,13 @@ Idx Name Size VMA LMA File off Algn Flags
1 NRV2E 00000218 00000000 00000000 00000060 2**0 CONTENTS, RELOC, READONLY
2 NRV2D 000001f0 00000000 00000000 00000278 2**0 CONTENTS, RELOC, READONLY
3 NRV2B 000001b4 00000000 00000000 00000468 2**0 CONTENTS, RELOC, READONLY
4 LZMA_ELF00 00000070 00000000 00000000 0000061c 2**0 CONTENTS, READONLY
5 LZMA_DEC10 00000ad8 00000000 00000000 0000068c 2**0 CONTENTS, READONLY
6 LZMA_DEC20 00000ad8 00000000 00000000 00001164 2**0 CONTENTS, READONLY
7 LZMA_DEC30 00000004 00000000 00000000 00001c3c 2**0 CONTENTS, READONLY
8 NRV_TAIL 00000000 00000000 00000000 00001c40 2**0 CONTENTS, READONLY
9 ELFMAINY 0000005e 00000000 00000000 00001c40 2**0 CONTENTS, RELOC, READONLY
10 ELFMAINZ 000000bc 00000000 00000000 00001c9e 2**0 CONTENTS, READONLY
4 LZMA_ELF00 0000006c 00000000 00000000 0000061c 2**0 CONTENTS, READONLY
5 LZMA_DEC10 00000ad8 00000000 00000000 00000688 2**0 CONTENTS, READONLY
6 LZMA_DEC20 00000ad8 00000000 00000000 00001160 2**0 CONTENTS, READONLY
7 LZMA_DEC30 00000004 00000000 00000000 00001c38 2**0 CONTENTS, READONLY
8 NRV_TAIL 00000000 00000000 00000000 00001c3c 2**0 CONTENTS, READONLY
9 ELFMAINY 0000005e 00000000 00000000 00001c3c 2**0 CONTENTS, RELOC, READONLY
10 ELFMAINZ 000000bc 00000000 00000000 00001c9a 2**0 CONTENTS, READONLY
SYMBOL TABLE:
00000000 l d ELFMAINY 00000000 ELFMAINY
00000000 l d ELFMAINZ 00000000 ELFMAINZ