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-rw-r--r--include/nitro/os_alloc.c772
1 files changed, 772 insertions, 0 deletions
diff --git a/include/nitro/os_alloc.c b/include/nitro/os_alloc.c
new file mode 100644
index 00000000..e6a77d15
--- /dev/null
+++ b/include/nitro/os_alloc.c
@@ -0,0 +1,772 @@
+//
+// Created by mart on 4/23/20.
+//
+
+#include "os_alloc.h"
+#include "consts.h"
+#include "os_system.h"
+#include "os_protectionRegion.h"
+
+extern BOOL OSi_MainExArenaEnabled;
+extern BOOL OSi_Initialized; // TODO: located at 0x021d36f0
+extern u32 SDK_MAIN_ARENA_LO; // TODO: technically this should be defined in the lcf
+extern u32 SDK_SECTION_ARENA_EX_START; // TODO: technically this should be defined in the lcf
+extern u32 SDK_SECTION_ARENA_ITCM_START; // TODO: technically this should be defined in the lcf
+extern u32 SDK_SECTION_ARENA_DTCM_START; // TODO: technically this should be defined in the lcf
+extern u32 OS_GetConsoleType();
+extern Cell* DLInsert(Cell* list, Cell* cell);
+extern Cell* DLAddFront(Cell* list, Cell* cell);
+
+void* OSiHeapInfo[OS_ARENA_MAX] = {
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL
+};
+
+#ifdef MATCH_ASM
+asm static Cell* DLExtract(Cell* list, Cell* cell)
+{
+ ldr r3, [r1, #0x4]
+ cmp r3, #0x0
+ ldrne r2, [r1, #0x0]
+ strne r2, [r3, #0x0]
+ ldr r2, [r1, #0x0]
+ cmp r2, #0x0
+ ldreq r0, [r1, #0x4]
+ ldrne r1, [r1, #0x4]
+ strne r1, [r2, #0x4]
+ bx lr
+}
+#else
+static Cell* DLExtract(Cell* list, Cell* cell)
+{
+ if (cell->next) {
+ cell->prev = cell->next->prev;
+ }
+ if (cell->prev) {
+ cell->prev->next = cell->next;
+ return list;
+ }
+ else {
+ return cell->next;
+ }
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void* OS_AllocFromArenaHi(OSArenaId id, u32 size, u32 align) {
+ stmdb sp!,{ r4-r6, lr }
+ mov r4,r0
+ mov r6,r1
+ mov r5,r2
+ bl OS_GetArenaHi
+ cmp r0,#0x0
+ moveq r0,#0x0
+ ldmeqia sp!,{ r4-r6, lr }
+ bxeq lr
+ sub r1,r5,#0x1
+ mvn r2,r1
+ and r0,r0,r2
+ sub r1,r0,r6
+ mov r0,r4
+ and r5,r1,r2
+ bl OS_GetArenaLo
+ cmp r5,r0
+ movcc r0,#0x0
+ ldmccia sp!,{ r4-r6, lr }
+ bxcc lr
+ mov r0,r4
+ mov r1,r5
+ bl OS_SetArenaHi
+ mov r0,r5
+ ldmia sp!,{ r4-r6, lr }
+ bx lr
+}
+#else
+void* OS_AllocFromArenaHi(OSArenaId id, u32 size, u32 align) {
+ void* ptr;
+ u8* arenaHi;
+
+ arenaHi = OS_GetArenaHi(id);
+ if (!arenaHi) {
+ return NULL;
+ }
+
+ arenaHi = (u8 *)OSi_TRUNC(arenaHi, align);
+ arenaHi -= size;
+ arenaHi = ptr = (void *)OSi_TRUNC(arenaHi, align);
+
+ if (arenaHi < (u8*)OS_GetArenaLo(id)) {
+ return NULL;
+ }
+
+ OS_SetArenaHi(id, arenaHi);
+
+ return ptr;
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void* OS_AllocFromArenaLo(OSArenaId id, u32 size, u32 align) {
+ stmdb sp!,{ r4-r7, lr }
+ sub sp,sp,#0x4
+ mov r7,r0
+ mov r6,r1
+ mov r5,r2
+ bl OS_GetArenaLo
+ cmp r0,#0x0
+ addeq sp,sp,#0x4
+ moveq r0,#0x0
+ ldmeqia sp!,{ r4-r7, lr }
+ bxeq lr
+ add r0,r0,r5
+ sub r1,r5,#0x1
+ mvn r2,r1
+ sub r0,r0,#0x1
+ and r4,r2,r0
+ add r0,r4,r6
+ add r0,r0,r5
+ sub r1,r0,#0x1
+ mov r0,r7
+ and r5,r2,r1
+ bl OS_GetArenaHi
+ cmp r5,r0
+ addhi sp,sp,#0x4
+ movhi r0,#0x0
+ ldmhiia sp!,{ r4-r7, lr }
+ bxhi lr
+ mov r0,r7
+ mov r1,r5
+ bl OS_SetArenaLo
+ mov r0,r4
+ add sp,sp,#0x4
+ ldmia sp!,{ r4-r7, lr }
+ bx lr
+}
+#else
+void* OS_AllocFromArenaLo(OSArenaId id, u32 size, u32 align) {
+ void* ptr;
+ u8* arenaLo;
+ ptr = OS_GetArenaLo(id);
+ if (!ptr) {
+ return NULL;
+ }
+ arenaLo = ptr = (void *)OSi_ROUND(ptr, align);
+ arenaLo += size;
+ arenaLo = (u8 *)OSi_ROUND(arenaLo, align);
+ if (arenaLo > (u8*)OS_GetArenaHi(id)) {
+ return NULL;
+ }
+ OS_SetArenaLo(id, arenaLo);
+
+ return ptr;
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void OS_SetArenaLo(OSArenaId id, void* newLo) {
+ mov r0,r0, lsl #0x2
+ add r0,r0,#0x2700000
+ add r0,r0,#0xff000
+ str r1,[r0,#0xda0]
+ bx lr
+}
+#else
+void OS_SetArenaLo(OSArenaId id, void* newLo) {
+ OSi_GetArenaInfo().lo[id] = newLo;
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void OS_SetArenaHi(OSArenaId id, void* newHi) {
+ mov r0,r0, lsl #0x2
+ add r0,r0,#0x2700000
+ add r0,r0,#0xff000
+ str r1,[r0,#0xdc4]
+ bx lr
+}
+#else
+void OS_SetArenaHi(OSArenaId id, void* newHi) {
+ OSi_GetArenaInfo().lo[id] = newHi;
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void* OS_GetInitArenaLo(OSArenaId id) {
+ stmdb sp!, {lr}
+ sub sp, sp, #0x4
+ cmp r0, #0x6
+ addls pc, pc, r0, lsl #0x2
+ b _020CC3DC
+_020CC330:
+ b _020CC34C
+ b _020CC3DC
+ b _020CC35C
+ b _020CC39C
+ b _020CC3AC
+ b _020CC3BC
+ b _020CC3CC
+_020CC34C:
+ add sp, sp, #0x4
+ ldr r0, =SDK_MAIN_ARENA_LO
+ ldmfd sp!, {lr}
+ bx lr
+_020CC35C:
+ ldr r0, =OSi_MainExArenaEnabled
+ ldr r0, [r0]
+ cmp r0, #0x0
+ beq _020CC37C
+ bl OS_GetConsoleType
+ and r0, r0, #0x3
+ cmp r0, #0x1
+ bne _020CC38C
+_020CC37C:
+ add sp, sp, #0x4
+ mov r0, #0x0
+ ldmfd sp!, {lr}
+ bx lr
+_020CC38C:
+ add sp, sp, #0x4
+ ldr r0, =SDK_SECTION_ARENA_EX_START
+ ldmfd sp!, {lr}
+ bx lr
+_020CC39C:
+ add sp, sp, #0x4
+ ldr r0, =SDK_SECTION_ARENA_ITCM_START
+ ldmfd sp!, {lr}
+ bx lr
+_020CC3AC:
+ add sp, sp, #0x4
+ ldr r0, =SDK_SECTION_ARENA_DTCM_START
+ ldmfd sp!, {lr}
+ bx lr
+_020CC3BC:
+ add sp, sp, #0x4
+ ldr r0, =HW_SHARED_ARENA_LO_DEFAULT
+ ldmfd sp!, {lr}
+ bx lr
+_020CC3CC:
+ add sp, sp, #0x4
+ ldr r0, =OSi_WRAM_MAIN_ARENA_LO_DEFAULT
+ ldmfd sp!, {lr}
+ bx lr
+_020CC3DC:
+ mov r0, #0x0
+ add sp, sp, #0x4
+ ldmia sp!, {lr}
+ bx lr
+}
+#else
+void* OS_GetInitArenaLo(OSArenaId id) {
+ switch (id) {
+ case OS_ARENA_MAIN:
+ return (void *)SDK_MAIN_ARENA_LO;
+ case OS_ARENA_MAINEX:
+ if (!OSi_MainExArenaEnabled || (OS_GetConsoleType() & OS_CONSOLE_SIZE_MASK) == OS_CONSOLE_SIZE_4MB) {
+ return NULL;
+ } else {
+ return (void *)SDK_SECTION_ARENA_EX_START;
+ }
+ case OS_ARENA_ITCM:
+ return (void *)SDK_SECTION_ARENA_ITCM_START;
+ case OS_ARENA_DTCM:
+ return (void *)SDK_SECTION_ARENA_DTCM_START;
+ case OS_ARENA_SHARED:
+ return (void *)HW_SHARED_ARENA_LO_DEFAULT;
+ case OS_ARENA_WRAM_MAIN:
+ return (void *)OSi_WRAM_MAIN_ARENA_LO_DEFAULT;
+ default:
+ return NULL;
+ }
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void* OS_GetInitArenaHi(OSArenaId id) {
+ stmdb sp!, {lr}
+ sub sp, sp, #0x4
+ cmp r0, #0x6
+ addls pc, pc, r0, lsl #0x2
+ b _020CC508
+_020CC41C:
+ b _020CC438
+ b _020CC508
+ b _020CC448
+ b _020CC488
+ b _020CC498
+ b _020CC4E8
+ b _020CC4F8
+_020CC438:
+ add sp, sp, #0x4
+ ldr r0, =OSi_MAIN_ARENA_HI_DEFAULT
+ ldmfd sp!, {lr}
+ bx lr
+_020CC448:
+ ldr r0, =OSi_MainExArenaEnabled
+ ldr r0, [r0]
+ cmp r0, #0x0
+ beq _020CC468
+ bl OS_GetConsoleType
+ and r0, r0, #0x3
+ cmp r0, #0x1
+ bne _020CC478
+_020CC468:
+ add sp, sp, #0x4
+ mov r0, #0x0
+ ldmfd sp!, {lr}
+ bx lr
+_020CC478:
+ add sp, sp, #0x4
+ mov r0, #OSi_MAINEX_ARENA_HI_DEFAULT
+ ldmfd sp!, {lr}
+ bx lr
+_020CC488:
+ add sp, sp, #0x4
+ mov r0, #HW_ITCM_ARENA_HI_DEFAULT
+ ldmfd sp!, {lr}
+ bx lr
+_020CC498:
+ ldr r0, =0x027E0000
+ ldr r1, =0x00000000
+ ldr r2, =0x00000400
+ add r3, r0, #0x3f80
+ cmp r1, #0x0
+ sub r2, r3, r2
+ bne _020CC4CC
+ ldr r1, =0x027E0080
+ add sp, sp, #0x4
+ cmp r0, r1
+ movcc r0, r1
+ ldmfd sp!, {lr}
+ bx lr
+_020CC4CC:
+ cmp r1, #0x0
+ ldrlt r0, =0x027E0080
+ add sp, sp, #0x4
+ sublt r0, r0, r1
+ subge r0, r2, r1
+ ldmfd sp!, {lr}
+ bx lr
+_020CC4E8:
+ add sp, sp, #0x4
+ ldr r0, =HW_SHARED_ARENA_HI_DEFAULT
+ ldmfd sp!, {lr}
+ bx lr
+_020CC4F8:
+ add sp, sp, #0x4
+ ldr r0, =OSi_WRAM_MAIN_ARENA_HI_DEFAULT;
+ ldmfd sp!, {lr}
+ bx lr
+_020CC508:
+ mov r0, #0x0
+ add sp, sp, #0x4
+ ldmia sp!, {lr}
+ bx lr
+}
+#else
+void* OS_GetInitArenaHi(OSArenaId id) {
+ switch (id) {
+ case OS_ARENA_MAIN:
+ return (void *)OSi_MAIN_ARENA_HI_DEFAULT;
+ case OS_ARENA_MAINEX:
+ if (!OSi_MainExArenaEnabled || (OS_GetConsoleType() & OS_CONSOLE_SIZE_MASK) == OS_CONSOLE_SIZE_4MB) {
+ return (void *)0;
+ } else {
+ return (void *)OSi_MAINEX_ARENA_HI_DEFAULT;
+ }
+ case OS_ARENA_ITCM:
+ return (void *)HW_ITCM_ARENA_HI_DEFAULT;
+ case OS_ARENA_DTCM:
+ return (void *)0x027e0080; //todo pretty sure this is incorrect, no constant and doesn't match
+ case OS_ARENA_SHARED:
+ return (void *)HW_SHARED_ARENA_HI_DEFAULT;
+ case OS_ARENA_WRAM_MAIN:
+ return (void *)OSi_WRAM_MAIN_ARENA_HI_DEFAULT;
+ default:
+ return NULL;
+ }
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void* OS_GetArenaLo(OSArenaId id) {
+ mov r0,r0, lsl #0x2
+ add r0,r0,#0x2700000
+ add r0,r0,#0xff000
+ ldr r0,[r0,#0xda0]
+ bx lr
+}
+#else
+void* OS_GetArenaLo(OSArenaId id) {
+ return OSi_GetArenaInfo().lo[id];
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void* OS_GetArenaHi(OSArenaId id) {
+ mov r0,r0, lsl #0x2
+ add r0,r0,#0x2700000
+ add r0,r0,#0xff000
+ ldr r0,[r0,#0xdc4]
+ bx lr
+}
+#else
+void* OS_GetArenaHi(OSArenaId id) {
+ return OSi_GetArenaInfo().hi[id];
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void OS_InitArenaEx() {
+ stmdb sp!,{ lr }
+ sub sp,sp,#0x4
+ mov r0,#0x2
+ bl OS_GetInitArenaHi
+ mov r1,r0
+ mov r0,#0x2
+ bl OS_SetArenaHi
+ mov r0,#0x2
+ bl OS_GetInitArenaLo
+ mov r1,r0
+ mov r0,#0x2
+ bl OS_SetArenaLo
+ ldr r0, =OSi_MainExArenaEnabled
+ ldr r0,[r0,#0x0]
+ cmp r0,#0x0
+ beq _020CC5B8
+ bl OS_GetConsoleType
+ and r0,r0,#0x3
+ cmp r0,#0x1
+ addne sp,sp,#0x4
+ ldmneia sp!,{ lr }
+ bxne lr
+_020CC5B8:
+ ldr r0, =0x0200002b
+ bl OS_SetProtectionRegion1
+ ldr r0, =0x023e0021
+ bl OS_SetProtectionRegion2
+ add sp,sp,#0x4
+ ldmia sp!,{ lr }
+ bx lr
+}
+#else
+void OS_InitArenaEx() { //todo figure out what compiler settings will get this to match
+ OS_SetArenaHi(2, OS_GetInitArenaHi(OS_ARENA_MAINEX));
+ OS_SetArenaLo(2, OS_GetInitArenaLo(OS_ARENA_MAINEX));
+
+ if (!OSi_MainExArenaEnabled || (OS_GetConsoleType() & OS_CONSOLE_SIZE_MASK) == OS_CONSOLE_SIZE_4MB) {
+ OS_SetProtectionRegion(1, HW_MAIN_MEM, 4MB);
+ OS_SetProtectionRegion(2, HW_MAIN_MEM_MAIN_END, 128KB);
+ }
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void OS_InitArena() {
+ stmdb sp!,{ lr }
+ sub sp,sp,#0x4
+ ldr r1, =OSi_Initialized
+ ldr r0,[r1,#0x0]
+ cmp r0,#0x0
+ addne sp,sp,#0x4
+ ldmneia sp!,{ lr }
+ bxne lr
+ mov r2,#0x1
+ mov r0,#0x0
+ str r2,[r1,#0x0]
+ bl OS_GetInitArenaHi
+ mov r1,r0
+ mov r0,#0x0
+ bl OS_SetArenaHi
+ mov r0,#0x0
+ bl OS_GetInitArenaLo
+ mov r1,r0
+ mov r0,#0x0
+ bl OS_SetArenaLo
+ mov r0,#0x2
+ mov r1,#0x0
+ bl OS_SetArenaLo
+ mov r0,#0x2
+ mov r1,#0x0
+ bl OS_SetArenaHi
+ mov r0,#0x3
+ bl OS_GetInitArenaHi
+ mov r1,r0
+ mov r0,#0x3
+ bl OS_SetArenaHi
+ mov r0,#0x3
+ bl OS_GetInitArenaLo
+ mov r1,r0
+ mov r0,#0x3
+ bl OS_SetArenaLo
+ mov r0,#0x4
+ bl OS_GetInitArenaHi
+ mov r1,r0
+ mov r0,#0x4
+ bl OS_SetArenaHi
+ mov r0,#0x4
+ bl OS_GetInitArenaLo
+ mov r1,r0
+ mov r0,#0x4
+ bl OS_SetArenaLo
+ mov r0,#0x5
+ bl OS_GetInitArenaHi
+ mov r1,r0
+ mov r0,#0x5
+ bl OS_SetArenaHi
+ mov r0,#0x5
+ bl OS_GetInitArenaLo
+ mov r1,r0
+ mov r0,#0x5
+ bl OS_SetArenaLo
+ mov r0,#0x6
+ bl OS_GetInitArenaHi
+ mov r1,r0
+ mov r0,#0x6
+ bl OS_SetArenaHi
+ mov r0,#0x6
+ bl OS_GetInitArenaLo
+ mov r1,r0
+ mov r0,#0x6
+ bl OS_SetArenaLo
+ add sp,sp,#0x4
+ ldmia sp!,{ lr }
+ bx lr
+}
+#else
+void OS_InitArena() {
+ if (OSi_Initialized) {
+ return;
+ }
+ OSi_Initialized = TRUE;
+
+ OS_SetArenaHi(OS_ARENA_MAIN, OS_GetInitArenaHi(OS_ARENA_MAIN));
+ OS_SetArenaLo(OS_ARENA_MAIN, OS_GetInitArenaLo(OS_ARENA_MAIN));
+
+ OS_SetArenaLo(OS_ARENA_MAINEX, (void *)0);
+ OS_SetArenaHi(OS_ARENA_MAINEX, (void *)0);
+
+ OS_SetArenaHi(OS_ARENA_ITCM, OS_GetInitArenaHi(OS_ARENA_ITCM));
+ OS_SetArenaLo(OS_ARENA_ITCM, OS_GetInitArenaLo(OS_ARENA_ITCM));
+
+ OS_SetArenaHi(OS_ARENA_DTCM, OS_GetInitArenaHi(OS_ARENA_DTCM));
+ OS_SetArenaLo(OS_ARENA_DTCM, OS_GetInitArenaLo(OS_ARENA_DTCM));
+
+ OS_SetArenaHi(OS_ARENA_SHARED, OS_GetInitArenaHi(OS_ARENA_SHARED));
+ OS_SetArenaLo(OS_ARENA_SHARED, OS_GetInitArenaLo(OS_ARENA_SHARED));
+
+ OS_SetArenaHi(OS_ARENA_WRAM_MAIN, OS_GetInitArenaHi(OS_ARENA_WRAM_MAIN));
+ OS_SetArenaLo(OS_ARENA_WRAM_MAIN, OS_GetInitArenaLo(OS_ARENA_WRAM_MAIN));
+}
+#endif
+
+#define HEADERSIZE OSi_ROUND(sizeof(Cell), 32)
+#define MINOBJSIZE (HEADERSIZE+32)
+
+#ifdef MATCH_ASM
+asm void OS_FreeToHeap(OSArenaId id, OSHeapHandle heap, void* ptr) {
+ stmdb sp!, {r4-r7, lr}
+ sub sp,sp,#0x4
+ mov r7,r0
+ mov r5,r1
+ mov r4,r2
+ bl OS_DisableInterrupts
+ ldr r1,=OSiHeapInfo
+ mov r6,r0
+ ldr r0,[r1,r7,lsl #0x2]
+ cmp r5,#0x0
+ ldrlt r5,[r0,#0x0]
+ ldr r1,[r0,#0x10]
+ mov r0,#0xc
+ mla r7,r5,r0,r1
+ sub r4,r4,#0x20
+ ldr r0,[r7,#0x8]
+ mov r1,r4
+ bl DLExtract
+ str r0,[r7,#0x8]
+ ldr r0,[r7,#0x4]
+ mov r1,r4
+ bl DLInsert
+ str r0,[r7,#0x4]
+ mov r0,r6
+ bl OS_RestoreInterrupts
+ add sp,sp,#0x4
+ ldmia sp!,{ r4-r7, lr }
+ bx lr
+}
+#else
+void OS_FreeToHeap(OSArenaId id, OSHeapHandle heap, void* ptr) {
+ OSHeapInfo *heapInfo;
+ HeapDesc *hd;
+ Cell *cell;
+
+ OSIntrMode enabled = OS_DisableInterrupts();
+ heapInfo = OSiHeapInfo[id];
+
+ if (heap < 0) {
+ heap = heapInfo->currentHeap;
+ }
+
+ cell = (Cell *) ((char *)ptr - HEADERSIZE);
+ hd = &heapInfo->heapArray[heap];
+
+ hd->allocated = DLExtract(hd->allocated, cell);
+ hd->free = DLInsert(hd->free, cell);
+
+ OS_RestoreInterrupts(enabled);
+}
+#endif
+
+#ifdef MATCH_ASM
+asm void* OS_AllocFromHeap(OSArenaId id, OSHeapHandle heap, u32 size) {
+ stmdb sp!, {r4-r7,lr}
+ sub sp, sp, #0x4
+ mov r6, r0
+ mov r5, r1
+ mov r7, r2
+ bl OS_DisableInterrupts
+ ldr r1, =OSiHeapInfo
+ mov r4, r0
+ ldr r1, [r1, r6, lsl #0x2]
+ cmp r1, #0x0
+ bne _020CC7AC
+ bl OS_RestoreInterrupts
+ add sp, sp, #0x4
+ mov r0, #0x0
+ ldmia sp!, {r4-r7,lr}
+ bx lr
+_020CC7AC:
+ cmp r5, #0x0
+ ldrlt r5, [r1, #0x0]
+ ldr r1, [r1, #0x10]
+ mov r0, #0xc
+ mla r6, r5, r0, r1
+ ldr r0, [r6, #0x4]
+ add r1, r7, #0x20
+ add r1, r1, #0x1f
+ mov r5, r0
+ cmp r0, #0x0
+ bic r7, r1, #0x1f
+ beq _020CC7F4
+_020CC7DC:
+ ldr r1, [r5, #0x8]
+ cmp r7, r1
+ ble _020CC7F4
+ ldr r5, [r5, #0x4]
+ cmp r5, #0x0
+ bne _020CC7DC
+_020CC7F4:
+ cmp r5, #0x0
+ bne _020CC814
+ mov r0, r4
+ bl OS_RestoreInterrupts
+ add sp, sp, #0x4
+ mov r0, #0x0
+ ldmia sp!, {r4-r7,lr}
+ bx lr
+_020CC814:
+ ldr r1, [r5, #0x8]
+ sub r1, r1, r7
+ cmp r1, #0x40
+ bhs _020CC834
+ mov r1, r5
+ bl DLExtract
+ str r0, [r6, #0x4]
+ b _020CC86C
+_020CC834:
+ str r7, [r5, #0x8]
+ add r2, r5, r7
+ str r1, [r2, #0x8]
+ ldr r0, [r5, #0x0]
+ str r0, [r5, r7]
+ ldr r0, [r5, #0x4]
+ str r0, [r2, #0x4]
+ ldr r0, [r2, #0x4]
+ cmp r0, #0x0
+ strne r2, [r0, #0x0]
+ ldr r0, [r2, #0x0]
+ cmp r0, #0x0
+ strne r2, [r0, #0x4]
+ streq r2, [r6, #0x4]
+_020CC86C:
+ ldr r0, [r6, #0x8]
+ mov r1, r5
+ bl DLAddFront
+ str r0, [r6, #0x8]
+ mov r0, r4
+ bl OS_RestoreInterrupts
+ add r0, r5, #0x20
+ add sp, sp, #0x4
+ ldmia sp!, {r4-r7,lr}
+ bx lr
+}
+#else
+void* OS_AllocFromHeap(OSArenaId id, OSHeapHandle heap, u32 size) {
+ OSHeapInfo* heapInfo;
+ HeapDesc* hd;
+ Cell* cell;
+ Cell* newCell;
+ long leftoverSize;
+
+ OSIntrMode enabled = OS_DisableInterrupts();
+ heapInfo = OSiHeapInfo[id];
+ if (!heapInfo) {
+ OS_RestoreInterrupts(enabled);
+ return NULL;
+ }
+
+ if (heap < 0) {
+ heap = heapInfo->currentHeap;
+ }
+
+ hd = &heapInfo->heapArray[heap];
+
+ size += HEADERSIZE;
+ size = OSi_ROUND(size, 32);
+
+ for (cell = hd->free; cell != NULL; cell = cell->next) {
+ if ((long)size <= cell->size) {
+ break;
+ }
+ }
+
+ if (cell == NULL) {
+ OS_RestoreInterrupts(enabled);
+ return NULL;
+ }
+
+ leftoverSize = cell->size - (long)size;
+ if (leftoverSize < MINOBJSIZE) {
+ hd->free = DLExtract(hd->free, cell);
+ } else {
+ cell->size = (long)size;
+
+ newCell = (Cell *) ((char *)cell + size);
+ newCell->size = leftoverSize;
+
+ newCell->prev = cell->prev;
+ newCell->next = cell->next;
+
+ if (newCell->next != NULL) {
+ newCell->next->prev = newCell;
+ }
+
+ if (newCell->prev != NULL) {
+ newCell->prev->next = newCell;
+ } else {
+ hd->free = newCell;
+ }
+ }
+
+ hd->allocated = DLAddFront(hd->allocated, cell);
+
+ OS_RestoreInterrupts(enabled);
+ return (void *)((char *)cell + HEADERSIZE);
+}
+#endif \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-20 03:38:21 +0000