# Read a series of segments from stdin and concatenate segments with the same # name on stdout. # # Segments are emitted in order of first encounter. # # Drop lines that are all comments. They could get misleading after assortment # because we don't know if they refer to the line above or the line below. # # To run: # $ bootstrap/bootstrap translate [01]*.subx apps/subx-params.subx apps/assort.subx -o apps/assort # $ cat x # == code # abc # == code # def # $ cat x |bootstrap/bootstrap run assort # == code # abc # def == code # instruction effective address register displacement immediate # . op subop mod rm32 base index scale r32 # . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes Entry: # run tests if necessary, convert stdin if not # . prologue 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # initialize heap # . Heap = new-segment(Heap-size) # . . push args 68/push Heap/imm32 ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Heap-size/disp32 # push *Heap-size # . . call e8/call new-segment/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # - if argc > 1 and argv[1] == "test", then return run_tests() # if (argc <= 1) goto interactive 81 7/subop/compare 1/mod/*+disp8 5/rm32/ebp . . . . 0/disp8 1/imm32 # compare *ebp 7e/jump-if-<= $subx-assort-main:interactive/disp8 # if (!kernel-string-equal?(argv[1], "test")) goto interactive # . eax = kernel-string-equal?(argv[1], "test") # . . push args 68/push "test"/imm32 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call kernel-string-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # . if (eax == false) goto interactive 3d/compare-eax-and 0/imm32/false 74/jump-if-= $subx-assort-main:interactive/disp8 # run-tests() e8/call run-tests/disp32 # syscall(exit, *Num-test-failures) 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/ebx Num-test-failures/disp32 # copy *Num-test-failures to ebx eb/jump $subx-assort-main:end/disp8 $subx-assort-main:interactive: # - otherwise convert stdin # var ed/eax: exit-descriptor 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # subtract from esp 89/copy 3/mod/direct 0/rm32/eax . . . 4/r32/esp . . # copy esp to eax # configure ed to really exit() # . ed->target = 0 c7 0/subop/copy 0/mod/direct 0/rm32/eax . . . . . 0/imm32 # copy to *eax # subx-assort(Stdin, Stdout, Stderr, ed) # . . push args 50/push-eax/ed 68/push Stderr/imm32 68/push Stdout/imm32 68/push Stdin/imm32 # . . call e8/call subx-assort/disp32 # . . discar
#ifndef ALLOC_H
#define ALLOC_H
#include "common.h"
#include "process.h"
void initializeKernelHeap();
void *ksbrkPage(int n);
void *kmalloc(uint32 size);
void kfree(void *v_addr);
void initializeProcessHeap(Process* process);
void *sbrk(Process* process, int nBytes);
uint32 getKernelHeapUsed();
struct MallocHeader {
unsigned long size:31;
unsigned long used:1;
} __attribute__ ((packed));
typedef struct MallocHeader MallocHeader;
#endif // ALLOC_H