First version of Hex in hex and C
This commit is contained in:
Jeremiah Orians
parent
02d5888f16
commit
b08362b680
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@ -0,0 +1,68 @@
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#include<stdio.h>
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#include<stdlib.h>
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#include<stdbool.h>
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void purge_line_comments()
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{
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char c;
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do
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{
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c = getchar();
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if (EOF == c)
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{
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exit(EXIT_SUCCESS);
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}
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} while ( '\n' != c );
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}
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int hex(char c)
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{
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switch(c)
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{
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case '0' ... '9': return (c - 48);
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case 'a' ... 'f': return (c - 87);
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case 'A' ... 'F': return (c - 55);
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default: break;
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}
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printf("You managed to call a hex function without a hex value!!!\n");
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exit(EXIT_FAILURE);
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}
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int main(int argc, char *argv[])
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{
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char c;
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int sum;
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bool toggle;
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toggle = false;
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do
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{
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c = getchar();
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switch(c)
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{
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case '0' ... '9':
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case 'a' ... 'f':
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case 'A' ... 'F':
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{
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if(!toggle)
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{
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sum = hex(c);
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toggle = true;
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}
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else
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{
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sum = (sum * 16) + hex(c);
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toggle = false;
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putc(sum, stdout);
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}
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break;
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}
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case '#': purge_line_comments();
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default: break;
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}
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}while(c != EOF);
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exit(EXIT_SUCCESS);
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}
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@ -0,0 +1,126 @@
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## Self Bootstrapping Hex Assembler written in Hex
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## And a shitload of comments
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## That can be converted to assembly and compiled
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## ELF Header
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7F 45 4C 46 ## e_ident[EI_MAG0-3] ELF's magic number
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02 ## e_ident[EI_CLASS] Indicating 64 bit
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01 ## e_ident[EI_DATA] Indicating little endianness
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01 ## e_ident[EI_VERSION] Indicating original elf
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00 ## e_ident[EI_OSABI] Set at 0 because none cares
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00 ## e_ident[EI_ABIVERSION] See above
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00 00 00 00 00 00 00 ## e_ident[EI_PAD]
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02 00 ## e_type Indicating Executable
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3E 00 ## e_machine Indicating AMD64
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01 00 00 00 ## e_version Indicating original elf
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FB 00 60 00 00 00 00 00 ## e_entry Address of the entry point
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40 00 00 00 00 00 00 00 ## e_phoff Address of program header table
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00 00 00 00 00 00 00 00 ## e_shoff Address of section header table
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00 00 00 00 ## e_flags
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40 00 ## e_ehsize Indicating our 64 Byte header
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38 00 ## e_phentsize size of a program header table
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01 00 ## e_phnum number of entries in program table
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00 00 ## e_shentsize size of a section header table
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00 00 ## e_shnum number of entries in section table
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00 00 ## e_shstrndx index of the section names
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## Program Header table
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01 00 00 00 ## p_type
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06 00 00 00 ## Flags
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00 00 00 00 00 00 00 00 ## p_offset
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00 00 60 00 00 00 00 00 ## p_vaddr
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00 00 60 00 00 00 00 00 ## Undefined
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9B 01 00 00 00 00 00 00 ## p_filesz
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9B 01 00 00 00 00 00 00 ## p_memsz
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00 00 20 00 00 00 00 00 ## Required alignment
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## Hex
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48 83 f8 23 # cmp $0x23,%rax
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74 26 # je 6000a4 <purge_comment>
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48 83 f8 30 # cmp $0x30,%rax
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7c 6f # jl 6000f3 <ascii_other>
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48 83 f8 3a # cmp $0x3a,%rax
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7c 5a # jl 6000e4 <ascii_num>
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48 83 f8 41 # cmp $0x41,%rax
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7c 63 # jl 6000f3 <ascii_other>
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48 83 f8 47 # cmp $0x47,%rax
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7c 58 # jl 6000ee <ascii_high>
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48 83 f8 61 # cmp $0x61,%rax
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7c 57 # jl 6000f3 <ascii_other>
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48 83 f8 67 # cmp $0x67,%rax
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7c 47 # jl 6000e9 <ascii_low>
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eb 4f # jmp 6000f3 <ascii_other>
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## Purge Comment
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48 c7 c2 01 00 00 00 # mov $0x1,%rdx
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48 c7 c6 99 01 60 00 # mov $0x600199,%rsi
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48 c7 c7 00 00 00 00 # mov $0x0,%rdi
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48 c7 c0 00 00 00 00 # mov $0x0,%rax
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0f 05 # syscall
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48 85 c0 # test %rax,%rax
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0f 84 be 00 00 00 # je 600189 <Done>
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8a 04 25 99 01 60 00 # mov 0x600199,%al
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48 0f b6 c0 # movzbq %al,%rax
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48 83 f8 0a # cmp $0xa,%rax
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75 c8 # jne 6000a4 <purge_comment>
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48 c7 c0 ff ff ff ff # mov $0xffffffffffffffff,%rax
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c3 # retq
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## ascii num
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48 83 e8 30 # sub $0x30,%rax
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c3 # retq
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## ascii low
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48 83 e8 57 # sub $0x57,%rax
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c3 # retq
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## ascii high
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48 83 e8 37 # sub $0x37,%rax
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c3 # retq
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## ascii other
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48 c7 c0 ff ff ff ff # mov $0xffffffffffffffff,%rax
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c3 # retq
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## start
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49 c7 c7 ff ff ff ff # mov $0xffffffffffffffff,%r15
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49 c7 c6 00 00 00 00 # mov $0x0,%r14
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## Loop
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48 c7 c2 01 00 00 00 # mov $0x1,%rdx
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48 c7 c6 99 01 60 00 # mov $0x600199,%rsi
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48 c7 c7 00 00 00 00 # mov $0x0,%rdi
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48 c7 c0 00 00 00 00 # mov $0x0,%rax
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0f 05 # syscall
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48 85 c0 # test %rax,%rax
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74 5d # je 600189 <Done>
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8a 04 25 99 01 60 00 # mov 0x600199,%al
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48 0f b6 c0 # movzbq %al,%rax
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e8 3c ff ff ff # callq 600078 <hex>
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48 83 f8 00 # cmp $0x0,%rax
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7c c7 # jl 600109 <loop>
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49 83 ff 00 # cmp $0x0,%r15
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7d 0c # jge 600154 <print>
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49 89 c6 # mov %rax,%r14
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49 c7 c7 00 00 00 00 # mov $0x0,%r15
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eb b5 # jmp 600109 <loop>
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## print
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49 c1 e6 04 # shl $0x4,%r14
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4c 01 f0 # add %r14,%rax
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88 04 25 9a 01 60 00 # mov %al,0x60019a
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49 c7 c7 ff ff ff ff # mov $0xffffffffffffffff,%r15
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48 c7 c2 01 00 00 00 # mov $0x1,%rdx
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48 c7 c6 9a 01 60 00 # mov $0x60019a,%rsi
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48 c7 c7 01 00 00 00 # mov $0x1,%rdi
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48 c7 c0 01 00 00 00 # mov $0x1,%rax
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0f 05 # syscall
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eb 80 # jmp 600109 <loop>
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## Done
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48 c7 c7 00 00 00 00 # mov $0x0,%rdi
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48 c7 c0 3c 00 00 00 # mov $0x3c,%rax
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0f 05 # syscall
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## Place for input, This actually isn't required but here it is
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02 00 00
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@ -1,8 +1,5 @@
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.text # section declaration
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# we must export the entry point to the ELF linker or loader.
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# They convientionally recognize _start as their entry point.
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# Use ld -e main to override the default if you wish
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# Our writable space
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.data
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.global _start
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hex:
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# Purge Comment Lines
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@ -128,8 +125,7 @@ Done:
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mov $60, %rax # put the exit syscall number in eax
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syscall # Call it a good day
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# Our writable space
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.data
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read_size = 2
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input:
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.byte read_size
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10
test.sh
10
test.sh
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@ -1,12 +1,12 @@
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#!/bin/bash
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# Build new
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./hex2 < hex2_1.hex | sponge trial && ./exec_enable trial
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./bin/hex < hex0.hex |
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sponge bin/trial && ./bin/exec_enable bin/trial
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# Test compile
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./trial < foo > example2
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readelf -a trial > summary2
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./bin/trial < hex0.hex |
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sponge tmp/foo
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# Check results
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sha256sum example* summary*
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sha256sum bin/trial tmp/foo
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