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Decompile __osPfsGetNextPage

This commit is contained in:
Ryan Dwyer 2021-03-25 20:29:59 +10:00
parent fae8a68da9
commit a27f27ca6a
2 changed files with 30 additions and 65 deletions
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1
src/include/lib/lib_50480.h
View File

@ -4,7 +4,6 @@
#include "data.h"
#include "types.h"
u32 func00050480(void);
s32 func00050554(s32 arg0, s32 arg1, u8 operation, u32 address, u32 len, u8 *buffer);
#endif

94
src/lib/lib_50480.c
View File

@ -6,68 +6,34 @@
#include "data.h"
#include "types.h"
GLOBAL_ASM(
glabel func00050480
/* 50480: 27bdffe0 */ addiu $sp,$sp,-32
/* 50484: afbf001c */ sw $ra,0x1c($sp)
/* 50488: afb00018 */ sw $s0,0x18($sp)
/* 5048c: afa50024 */ sw $a1,0x24($sp)
/* 50490: afa60028 */ sw $a2,0x28($sp)
/* 50494: 90af0000 */ lbu $t7,0x0($a1)
/* 50498: 90e20000 */ lbu $v0,0x0($a3)
/* 5049c: 00e08025 */ or $s0,$a3,$zero
/* 504a0: 00a07025 */ or $t6,$a1,$zero
/* 504a4: 104f000a */ beq $v0,$t7,.L000504d0
/* 504a8: 00003025 */ or $a2,$zero,$zero
/* 504ac: a0a20000 */ sb $v0,0x0($a1)
/* 504b0: 91c70000 */ lbu $a3,0x0($t6)
/* 504b4: afa40020 */ sw $a0,0x20($sp)
/* 504b8: 0c01324d */ jal __osPfsRWInode
/* 504bc: 8fa50028 */ lw $a1,0x28($sp)
/* 504c0: 10400003 */ beqz $v0,.L000504d0
/* 504c4: 8fa40020 */ lw $a0,0x20($sp)
/* 504c8: 1000001e */ b .L00050544
/* 504cc: 8fbf001c */ lw $ra,0x1c($sp)
.L000504d0:
/* 504d0: 92190001 */ lbu $t9,0x1($s0)
/* 504d4: 8fb80028 */ lw $t8,0x28($sp)
/* 504d8: 00194040 */ sll $t0,$t9,0x1
/* 504dc: 03084821 */ addu $t1,$t8,$t0
/* 504e0: 95210000 */ lhu $at,0x0($t1)
/* 504e4: a6010000 */ sh $at,0x0($s0)
/* 504e8: 8c8c0060 */ lw $t4,0x60($a0)
/* 504ec: 3023ffff */ andi $v1,$at,0xffff
/* 504f0: 006c082a */ slt $at,$v1,$t4
/* 504f4: 5420000c */ bnezl $at,.L00050528
/* 504f8: 24010001 */ addiu $at,$zero,0x1
/* 504fc: 920d0000 */ lbu $t5,0x0($s0)
/* 50500: 908f0064 */ lbu $t7,0x64($a0)
/* 50504: 01af082a */ slt $at,$t5,$t7
/* 50508: 50200007 */ beqzl $at,.L00050528
/* 5050c: 24010001 */ addiu $at,$zero,0x1
/* 50510: 92020001 */ lbu $v0,0x1($s0)
/* 50514: 18400003 */ blez $v0,.L00050524
/* 50518: 28410080 */ slti $at,$v0,0x80
/* 5051c: 14200008 */ bnez $at,.L00050540
/* 50520: 00001025 */ or $v0,$zero,$zero
.L00050524:
/* 50524: 24010001 */ addiu $at,$zero,0x1
.L00050528:
/* 50528: 14610003 */ bne $v1,$at,.L00050538
/* 5052c: 00000000 */ nop
/* 50530: 10000003 */ b .L00050540
/* 50534: 24020005 */ addiu $v0,$zero,0x5
.L00050538:
/* 50538: 10000001 */ b .L00050540
/* 5053c: 24020003 */ addiu $v0,$zero,0x3
.L00050540:
/* 50540: 8fbf001c */ lw $ra,0x1c($sp)
.L00050544:
/* 50544: 8fb00018 */ lw $s0,0x18($sp)
/* 50548: 27bd0020 */ addiu $sp,$sp,0x20
/* 5054c: 03e00008 */ jr $ra
/* 50550: 00000000 */ nop
);
#define CHECK_IPAGE(p, pfs) \
(((p).ipage >= (pfs).inode_start_page) && ((p).inode_t.bank < (pfs).banks) && ((p).inode_t.page >= 0x01) && \
((p).inode_t.page < 0x80))
s32 __osPfsGetNextPage(OSPfs *pfs, u8 *bank, __OSInode *inode, __OSInodeUnit *page)
{
s32 ret;
if (page->inode_t.bank != *bank) {
*bank = page->inode_t.bank;
if ((ret = __osPfsRWInode(pfs, inode, PFS_READ, *bank)) != 0) {
return ret;
}
}
*page = inode->inode_page[page->inode_t.page];
if (!CHECK_IPAGE(*page, *pfs)) {
if (page->ipage == 1) {
return PFS_ERR_INVALID;
}
return PFS_ERR_INCONSISTENT;
}
return 0;
}
GLOBAL_ASM(
glabel func00050554
@ -206,7 +172,7 @@ glabel func00050554
.L00050718:
/* 50718: 27a5003b */ addiu $a1,$sp,0x3b
/* 5071c: 27a6004c */ addiu $a2,$sp,0x4c
/* 50720: 0c014120 */ jal func00050480
/* 50720: 0c014120 */ jal __osPfsGetNextPage
/* 50724: 27a70048 */ addiu $a3,$sp,0x48
/* 50728: 10400003 */ beqz $v0,.L00050738
/* 5072c: 2610fff8 */ addiu $s0,$s0,-8
@ -232,7 +198,7 @@ glabel func00050554
/* 5076c: 02402025 */ or $a0,$s2,$zero
/* 50770: 27a5003b */ addiu $a1,$sp,0x3b
/* 50774: 27a6004c */ addiu $a2,$sp,0x4c
/* 50778: 0c014120 */ jal func00050480
/* 50778: 0c014120 */ jal __osPfsGetNextPage
/* 5077c: 27a70048 */ addiu $a3,$sp,0x48
/* 50780: 10400003 */ beqz $v0,.L00050790
/* 50784: 00008025 */ or $s0,$zero,$zero