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Decompile memaGrow

This commit is contained in:
Ryan Dwyer 2021-10-30 12:14:04 +10:00
parent 0e8e7da547
commit 90af295aca
2 changed files with 28 additions and 39 deletions
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2
src/include/lib/lib_126b0.h
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@ -9,7 +9,7 @@ void memaInit(void);
void memaHeapInit(void *ptr, u32 size);
void memaPrint(void);
void *memaAlloc(u32 size);
bool memaGrow(u32 arg0, u32 arg1);
s32 memaGrow(s32 addr, u32 amount);
void _memaFree(s32 addr, s32 size);
void memaFree(void *addr, s32 size);
s32 memaGetLongestFree(void);

65
src/lib/lib_126b0.c
View File

@ -620,44 +620,33 @@ glabel memaAlloc
// return (void *)addr;
//}
GLOBAL_ASM(
glabel memaGrow
/* 12c3c: 3c0f800a */ lui $t7,%hi(g_MemaHeap+0xc)
/* 12c40: 8def9484 */ lw $t7,%lo(g_MemaHeap+0xc)($t7)
/* 12c44: 3c0e800a */ lui $t6,%hi(g_MemaHeap+0xc)
/* 12c48: 2407ffff */ addiu $a3,$zero,-1
/* 12c4c: 25ce9484 */ addiu $t6,$t6,%lo(g_MemaHeap+0xc)
/* 12c50: 00a03025 */ or $a2,$a1,$zero
/* 12c54: 10ef000c */ beq $a3,$t7,.L00012c88
/* 12c58: 01c01025 */ or $v0,$t6,$zero
/* 12c5c: 8dc30000 */ lw $v1,0x0($t6)
.L00012c60:
/* 12c60: 54830006 */ bnel $a0,$v1,.L00012c7c
/* 12c64: 8c430008 */ lw $v1,0x8($v0)
/* 12c68: 8c450004 */ lw $a1,0x4($v0)
/* 12c6c: 00a6082b */ sltu $at,$a1,$a2
/* 12c70: 50200008 */ beqzl $at,.L00012c94
/* 12c74: 0066c021 */ addu $t8,$v1,$a2
/* 12c78: 8c430008 */ lw $v1,0x8($v0)
.L00012c7c:
/* 12c7c: 24420008 */ addiu $v0,$v0,0x8
/* 12c80: 14e3fff7 */ bne $a3,$v1,.L00012c60
/* 12c84: 00000000 */ nop
.L00012c88:
/* 12c88: 03e00008 */ jr $ra
/* 12c8c: 00001025 */ or $v0,$zero,$zero
/* 12c90: 0066c021 */ addu $t8,$v1,$a2
.L00012c94:
/* 12c94: 00a6c823 */ subu $t9,$a1,$a2
/* 12c98: ac580000 */ sw $t8,0x0($v0)
/* 12c9c: 17200002 */ bnez $t9,.L00012ca8
/* 12ca0: ac590004 */ sw $t9,0x4($v0)
/* 12ca4: ac400000 */ sw $zero,0x0($v0)
.L00012ca8:
/* 12ca8: 00801025 */ or $v0,$a0,$zero
/* 12cac: 03e00008 */ jr $ra
/* 12cb0: 00000000 */ nop
);
/**
* Grow the allocation which currently *ends at* the given address.
*/
s32 memaGrow(s32 addr, u32 amount)
{
struct memaspace *curr = &g_MemaHeap.spaces[1];
while (curr->addr != -1) {
if (curr->addr == addr && curr->size >= amount) {
goto found;
}
curr++;
}
return 0;
found:
curr->addr += amount;
curr->size -= amount;
if (curr->size == 0) {
curr->addr = 0;
}
return addr;
}
void memaFree(void *addr, s32 size)
{