diff options
Diffstat (limited to 'src/arch/i386/init/crt0.S.lb')
| -rw-r--r-- | src/arch/i386/init/crt0.S.lb | 104 |
1 files changed, 8 insertions, 96 deletions
diff --git a/src/arch/i386/init/crt0.S.lb b/src/arch/i386/init/crt0.S.lb index de83b6c417..c54e7053d0 100644 --- a/src/arch/i386/init/crt0.S.lb +++ b/src/arch/i386/init/crt0.S.lb @@ -69,106 +69,18 @@ __main: * the location it is compiled to run at. * Normally this is copying from FLASH ROM to RAM. */ -#if !CONFIG_COMPRESS + movl %ebp, %esi + movl $0x4000000, %esp + movl %esp, %ebp + pushl %esi movl $_liseg, %esi movl $_iseg, %edi movl $_eiseg, %ecx subl %edi, %ecx - movb %cl, %al - shrl $2, %ecx - andb $3, %al - rep movsl - movb %al, %cl - rep movsb -#else - leal 4+_liseg, %esi - leal _iseg, %edi - movl %ebp, %esp /* preserve %ebp */ - movl $-1, %ebp /* last_m_off = -1 */ - jmp dcl1_n2b - -/* ------------- DECOMPRESSION ------------- - - Input: - %esi - source - %edi - dest - %ebp - -1 - cld - - Output: - %eax - 0 - %ecx - 0 -*/ - -.macro getbit bits -.if \bits == 1 - addl %ebx, %ebx - jnz 1f -.endif - movl (%esi), %ebx - subl $-4, %esi /* sets carry flag */ - adcl %ebx, %ebx -1: -.endm - -decompr_literals_n2b: - movsb - -decompr_loop_n2b: - addl %ebx, %ebx - jnz dcl2_n2b -dcl1_n2b: - getbit 32 -dcl2_n2b: - jc decompr_literals_n2b - xorl %eax, %eax - incl %eax /* m_off = 1 */ -loop1_n2b: - getbit 1 - adcl %eax, %eax /* m_off = m_off*2 + getbit() */ - getbit 1 - jnc loop1_n2b /* while(!getbit()) */ - xorl %ecx, %ecx - subl $3, %eax - jb decompr_ebpeax_n2b /* if (m_off == 2) goto decompr_ebpeax_n2b ? */ - shll $8, %eax - movb (%esi), %al /* m_off = (m_off - 3)*256 + src[ilen++] */ - incl %esi - xorl $-1, %eax - jz decompr_end_n2b /* if (m_off == 0xffffffff) goto decomp_end_n2b */ - movl %eax, %ebp /* last_m_off = m_off ?*/ -decompr_ebpeax_n2b: - getbit 1 - adcl %ecx, %ecx /* m_len = getbit() */ - getbit 1 - adcl %ecx, %ecx /* m_len = m_len*2 + getbit()) */ - jnz decompr_got_mlen_n2b /* if (m_len == 0) goto decompr_got_mlen_n2b */ - incl %ecx /* m_len++ */ -loop2_n2b: - getbit 1 - adcl %ecx, %ecx /* m_len = m_len*2 + getbit() */ - getbit 1 - jnc loop2_n2b /* while(!getbit()) */ - incl %ecx - incl %ecx /* m_len += 2 */ -decompr_got_mlen_n2b: - cmpl $-0xd00, %ebp - adcl $1, %ecx /* m_len = m_len + 1 + (last_m_off > 0xd00) */ - movl %esi, %edx - leal (%edi,%ebp), %esi /* m_pos = dst + olen + -m_off */ - rep - movsb /* dst[olen++] = *m_pos++ while(m_len > 0) */ - movl %edx, %esi - jmp decompr_loop_n2b -decompr_end_n2b: - intel_chip_post_macro(0x12) /* post 12 */ - - movl %esp, %ebp -#endif - - CONSOLE_DEBUG_TX_STRING($str_pre_main) - leal _iseg, %edi - jmp *%edi + pushl %ecx + pushl %edi + pushl %esi + call copy_and_run_core .Lhlt: intel_chip_post_macro(0xee) /* post fe */ |