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# PSn00bSDK syscall wrappers
# (C) 2022-2023 spicyjpeg - MPL licensed
.set noreorder
## Interrupt enable/disable
.section .text.EnterCriticalSection
.global EnterCriticalSection
.type EnterCriticalSection, @function
EnterCriticalSection:
li $a0, 0x01
syscall 0
jr $ra
nop
.section .text.ExitCriticalSection
.global ExitCriticalSection
.type ExitCriticalSection, @function
ExitCriticalSection:
li $a0, 0x02
syscall 0
jr $ra
nop
.section .text.SwEnterCriticalSection
.global SwEnterCriticalSection
.type SwEnterCriticalSection, @function
SwEnterCriticalSection:
mfc0 $a0, $12 # cop0r12 &= ~0x401
li $a1, -1026
and $a1, $a0
mtc0 $a1, $12
andi $a0, 0x0401 # return !((cop0r12_prev & 0x401) < 0x401)
sltiu $v0, $a0, 0x0401
jr $ra
xori $v0, 1
.section .text.SwExitCriticalSection
.global SwExitCriticalSection
.type SwExitCriticalSection, @function
SwExitCriticalSection:
mfc0 $a0, $12 # cop0r12 |= 0x401
nop
ori $a0, 0x0401
mtc0 $a0, $12
nop
jr $ra
nop
## PCDRV (host file access) API
.section .text.PCinit
.global PCinit
.type PCinit, @function
PCinit:
break 0, 0x101 # () -> error
jr $ra
nop
.section .text.PCcreat
.global PCcreat
.type PCcreat, @function
PCcreat:
li $a2, 0
move $a1, $a0
break 0, 0x102 # (path, path, 0) -> error, fd
bgez $v0, .Lcreate_ok # if (error < 0) fd = error
nop
move $v1, $v0
.Lcreate_ok:
jr $ra # return fd
move $v0, $v1
.section .text.PCopen
.global PCopen
.type PCopen, @function
PCopen:
move $a2, $a1
move $a1, $a0
break 0, 0x103 # (path, path, mode) -> error, fd
bgez $v0, .Lopen_ok # if (error < 0) fd = error
nop
move $v1, $v0
.Lopen_ok:
jr $ra # return fd
move $v0, $v1
.section .text.PCclose
.global PCclose
.type PCclose, @function
PCclose:
move $a1, $a0
break 0, 0x104 # (fd, fd) -> error
jr $ra
nop
.section .text.PCread
.global PCread
.type PCread, @function
PCread:
move $a3, $a1
move $a1, $a0
break 0, 0x105 # (fd, fd, length, data) -> error, length
bgez $v0, .Lread_ok # if (error < 0) length = error
nop
move $v1, $v0
.Lread_ok:
jr $ra # return length
move $v0, $v1
.section .text.PCwrite
.global PCwrite
.type PCwrite, @function
PCwrite:
move $a3, $a1
move $a1, $a0
break 0, 0x106 # (fd, fd, length, data) -> error, length
bgez $v0, .Lwrite_ok # if (error < 0) length = error
nop
move $v1, $v0
.Lwrite_ok:
jr $ra # return length
move $v0, $v1
.section .text.PClseek
.global PClseek
.type PClseek, @function
PClseek:
move $a3, $a2
move $a2, $a1
move $a1, $a0
break 0, 0x107 # (fd, fd, offset, mode) -> error, offset
bgez $v0, .Lseek_ok # if (error < 0) offset = error
nop
move $v1, $v0
.Lseek_ok:
jr $ra # return offset
move $v0, $v1
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