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nrv2e PackLinuxElf32armLe works

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This commit is contained in:
John Reiser 2006-07-21 19:10:48 -07:00
parent 52e8326d54
commit 5f622efb77
3 changed files with 1176 additions and 1168 deletions
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6
src/p_lx_elf.cpp
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@ -1586,10 +1586,8 @@ void PackLinuxElf32::ARM_addLinkerSymbols(Filter const * /*ft*/)
adrm = PAGE_MASK & (~PAGE_MASK + adrm); // round up to page boundary
adrc = PAGE_MASK & (~PAGE_MASK + adrc); // round up to page boundary
linker->defineSymbol("CPR0", linker->getSymbolOffset("cpr0") -
linker->getSymbolOffset("_start"));
linker->defineSymbol("LENF", linker->getSymbolOffset("end_decompress") -
linker->getSymbolOffset("_start"));
linker->defineSymbol("CPR0", 4+ linker->getSymbolOffset("cpr0"));
linker->defineSymbol("LENF", 4+ linker->getSymbolOffset("end_decompress"));
linker->defineSymbol("ADRM", adrm); // addr for map
#undef PAGE_SIZE

2291
src/stub/arm-linux.elf-entry.h
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File diff suppressed because it is too large Load Diff

47
src/stub/src/arm-linux.elf-entry.S
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@ -38,6 +38,8 @@ sz_b_info= 12
sz_unc= 0
sz_cpr= 4
b_method= 8
sz_l_info= 12
sz_p_info= 12
PROT_READ= 1
PROT_WRITE= 2
@ -54,20 +56,20 @@ PAGE_SIZE = -(~0<<PAGE_SHIFT)
section ELFMAINX
start_params:
.long ADRM // dst for map
.long LENF // end_decompress - _start
.long CPR0 // cpr0 - _start
.long LENF // end_decompress - (start_params -4)
.long CPR0 // cpr0 - (start_params -4)
_start: .globl _start
/* Get some pages: enough
to duplicate the entire compressed PT_LOAD, plus 1 page, located just after
the brk() of the _un_compressed program. The address is pre-calculated
calculated by PackLinuxElf32arm::addLinkerSymbols().
*/
adr r12,start_params -4
ldmia r12!,{r1,r2, r10,r11} // r1= sz_pack2; r2= ADRM; r10= LENF; r11= CPR0;
adr r12,start_params -4 // &sz_pack2
ldmia r12,{r1,r2, r10,r11} // r1= sz_pack2; r2= ADRM; r10= LENF; r11= CPR0;
add r10,r10,r12 // end_decompress
add r11,r11,r12 // cpr0
mov r0,r2
sub r8,r12,r1 // 4*4+ (char *)&our_Elf32_Ehdr
mov r0,r2 // ADRM
sub r9,r12,r1 // &our_Elf32_Ehdr
add r1,r1,# PAGE_SIZE
stmdb sp!,{r0,r1,r2} // ADRU,LENU,space for sz_unc
mov r2,#PROT_READ | PROT_WRITE | PROT_EXEC
@ -76,16 +78,14 @@ _start: .globl _start
swi 0x009000c0 // mmap64
cmn r0,#4096
bcs msg_SELinux
mov r9,r0 // destination for copy
bic r8,r8,#0xff // round down to page boundary
copy:
ldmia r8!,{r0,r1,r2,r3,r4,r5,r6,r7}; cmp r8,r10
stmia r9!,{r0,r1,r2,r3,r4,r5,r6,r7}; blo copy
ldmia r9!,{r1,r2,r3,r4,r5,r6,r7,r8}; cmp r9,r10 // upto end-decompress
stmia r0!,{r1,r2,r3,r4,r5,r6,r7,r8}; blo copy
mov lr,r9 // dst for unfolded code
sub r11,r9,r8 // relocation amount
add r12,r12,# f_decompress - _start
add r5,r11,r12 // relocated f_decompress
sub r4,r0,r9 // relocation amount
adr r5,f_decompress
mov lr,r0 // dst for unfolded code
add r5,r5,r4 // relocated f_decompress
/* linux/include/asm-arm/unistd.h */
#define __NR_SYSCALL_BASE 0x900000
@ -93,15 +93,22 @@ copy:
#define __ARM_NR_cacheflush (__ARM_NR_BASE+2)
mov r0,r5
mov r1,r10 // relocated end_decompress
add r1,r9,r4 // relocated end_decompress
mov r2,#0
swi __ARM_NR_cacheflush // relocated decompressor
add r0, r4,# sz_b_info
ldr r1,[r4,# sz_cpr ]
ldr r9,[r12] // sz_pack2
sub r9,r9,#sz_Elf32_Ehdr + 2*sz_Elf32_Phdr + sz_l_info + sz_p_info
sub r10,r12,r9 // &b_info
add r10,r10,r4 // relocated &b_info
ldr r3,[r11,# sz_unc]
add r0, r11,# sz_b_info
ldr r1,[r11,# sz_cpr ]
mov r2,lr // dst
add r3,sp,#2*4 // &sz_unc
ldrb r4,[r4,# b_method ]
str r3,[sp,#2*4] // sz_unc; lzma needs for EOF
add r3, sp,#2*4 // &sz_unc
ldrb r4,[r11,# b_method ]
mov pc,r5 // decompress folded code; go there (lr)
f_decompress:
@ -143,8 +150,6 @@ L71:
cpr0:
/* { b_info={sz_unc, sz_cpr, {4 char}}, folded_loader...} */
eof:
/*
vi:ts=8:et:nowrap
*/