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PackLinuxElf32arm lzma cache flush; 5th arg to f_decompress is on stack

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This commit is contained in:
John Reiser 2006-07-22 11:39:29 -07:00
parent 05872d7650
commit cd1dec9fc7
4 changed files with 1168 additions and 1143 deletions
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2277
src/stub/arm-linux.elf-entry.h
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File diff suppressed because it is too large Load Diff

2
src/stub/src/arch/arm/v4a/Makefile.extra
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@ -28,7 +28,7 @@ lzma_d_c%.S : tc_bfdname = elf32-littlearm
tc.arm-lzma.gcc = $(tc.arm-linux.elf.gcc)
tc.arm-lzma.gcc += -march=armv4 -fPIC
tc.arm-lzma.gcc += -Os
#tc.arm-lzma.gcc += -Os
tc.arm-lzma.gcc += -ffunction-sections
tc.arm-lzma.gcc += -I$(UPX_LZMADIR)
tc.arm-lzma.gcc += -I$(top_srcdir)/src

25
src/stub/src/arch/arm/v4a/lzma_d.S
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@ -45,7 +45,11 @@
#define M_LZMA 14
ldrb ip,meth; cmp ip,#M_LZMA; bne not_lzma
PUSH {fp,lr}
#if defined(LINUX_ARM_CACHEFLUSH) /*{*/
PUSH {dst,ldst, fp,lr} // dst,ldst for cache flush
#else /*}{*/
PUSH { fp,lr}
#endif /*}*/
#define a0 r0
#define a1 r1
@ -70,8 +74,8 @@
mov fp,fp,LSR #3 // lit_context_bits + lit_pos_bits
mov ip,ip,LSL fp // 2*LZMA_LIT_SIZE << (lit_context_bits + lit_pos_bits)
mov fp,sp
add ip,ip,# ((State + 2*LZMA_BASE_SIZE)>>8)<<8
add ip,ip,#0xff & (State + 2*LZMA_BASE_SIZE)
#define W 4 /* even #bits to round up so that 8 bits span all the 1's */
add ip,ip,#((~(~0<<W) + State + 2*LZMA_BASE_SIZE)>>W)<<W
sub sp,sp,ip
ldr ip,[ldst]
@ -102,6 +106,21 @@
add a0,sp,#State
bl 1f // the call
mov sp,fp
#if defined(LINUX_ARM_CACHEFLUSH) /*{*/
/* linux/include/asm-arm/unistd.h */
#define __NR_SYSCALL_BASE 0x900000
#define __ARM_NR_BASE (__NR_SYSCALL_BASE+0x0f0000)
#define __ARM_NR_cacheflush (__ARM_NR_BASE+2)
mov r4,r0 // save result value
POP {r0,r1} // dst, ldst
ldr r1,[r1] // ldst by reference
add r1,r1,r0 // just beyond what was written
mov r2,#0
swi __ARM_NR_cacheflush // decompressed region
mov r0,r4 // result value
#endif /*}*/
POP {fp,pc}
1:

7
src/stub/src/arm-linux.elf-entry.S
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@ -102,14 +102,17 @@ copy:
sub r10,r12,r9 // &b_info
add r10,r10,r4 // relocated &b_info
ldrb r0,[r11,# b_method ] // 5th param
stmdb sp!,{r0,lr}
ldr r3,[r11,# sz_unc]
add r0, r11,# sz_b_info
ldr r1,[r11,# sz_cpr ]
mov r2,lr // dst
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)
mov lr,pc; mov pc,r5 // decompress folded code [opcode 'bx' not in v4a]
add sp,sp,#4 // discard 5th param
ldmia sp!,{pc}
f_decompress:
#define LINUX_ARM_CACHEFLUSH 1