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https://github.com/devkitPro/buildscripts.git
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*** empty log message ***
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@@ -8,9 +8,10 @@ MEMORY {
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iwram : ORIGIN = 0x03800000, LENGTH = 64K
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ewram : ORIGIN = 0x02040000, LENGTH = 4M
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}
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__iwram_start = 0x03800000;
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__iwram_start = 0x03800000;
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__iwram_end = 0x03810000;
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__sp_irq = 0x380000 - 0x60;
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__sp_irq = __iwram_end - 0x60;
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__sp_usr = __sp_irq - 0x100;
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SECTIONS
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@@ -7,36 +7,36 @@
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.arm
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_start:
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mov r0, #0x04000000 @ IME = 0;
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add r0, r0, #0x208
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strh r0, [r0]
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mov r0, #0x04000000 @ IME = 0;
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add r0, r0, #0x208
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strh r0, [r0]
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mov r0, #0x12 @ Switch to IRQ Mode
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msr cpsr, r0
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ldr sp, =__sp_irq @ Set IRQ stack
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mov r0, #0x12 @ Switch to IRQ Mode
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msr cpsr, r0
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ldr sp, =__sp_irq @ Set IRQ stack
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mov r0, #0x1F @ Switch to System Mode
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msr cpsr, r0
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ldr sp, =__sp_usr @ Set user stack
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mov r0, #0x1F @ Switch to System Mode
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msr cpsr, r0
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ldr sp, =__sp_usr @ Set user stack
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ldr r0, =__bss_start @ Clear BSS section to 0x00
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ldr r1, =__bss_end
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sub r1, r1, r0
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bl ClearMem
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ldr r0, =__bss_start @ Clear BSS section to 0x00
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ldr r1, =__bss_end
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sub r1, r1, r0
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bl ClearMem
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CIW0Skip:
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ldr r3, =_init @ global constructors
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bl _call_via_r3
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ldr r3, =_init @ global constructors
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bl _call_via_r3
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mov r0, #0 @ int argc
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mov r1, #0 @ char *argv[]
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ldr r3, =main
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bl _call_via_r3 @ jump to user code
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mov r0, #0 @ int argc
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mov r1, #0 @ char *argv[]
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ldr r3, =main
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bl _call_via_r3 @ jump to user code
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@ If the user ever returns, return to flash cartridge
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mov r0, #0x08000000
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bx r0
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@ If the user ever returns, return to flash cartridge
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mov r0, #0x08000000
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bx r0
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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@
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@@ -46,17 +46,19 @@ CIW0Skip:
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@
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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ClearMem: mov r2, #3 @ Round down to nearest word boundary
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add r1, r1, r2 @ Shouldn't be needed
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bics r1, r1, r2 @ Clear 2 LSB (and set Z)
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bxeq lr @ Quit if copy size is 0
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ClearMem:
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mov r2, #3 @ Round down to nearest word boundary
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add r1, r1, r2 @ Shouldn't be needed
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bics r1, r1, r2 @ Clear 2 LSB (and set Z)
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bxeq lr @ Quit if copy size is 0
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mov r2, #0
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ClrLoop: stmia r0!, {r2}
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subs r1, r1, #4
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bne ClrLoop
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mov r2, #0
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ClrLoop:
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stmia r0!, {r2}
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subs r1, r1, #4
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bne ClrLoop
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bx lr
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bx lr
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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@
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@@ -68,7 +70,7 @@ ClrLoop: stmia r0!, {r2}
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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CopyMemCheck:
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sub r3, r4, r2 @ Is there any data to copy?
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sub r3, r4, r2 @ Is there any data to copy?
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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@
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@@ -79,17 +81,19 @@ CopyMemCheck:
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@
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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CopyMem: mov r0, #3 @ These commands are used in cases where
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add r3, r3, r0 @ the length is not a multiple of 4,
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bics r3, r3, r0 @ even though it should be.
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bxeq lr @ Length is zero, so exit
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CopyMem:
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mov r0, #3 @ These commands are used in cases where
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add r3, r3, r0 @ the length is not a multiple of 4,
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bics r3, r3, r0 @ even though it should be.
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bxeq lr @ Length is zero, so exit
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CIDLoop: ldmia r1!, {r0}
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stmia r2!, {r0}
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subs r3, r3, #4
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bne CIDLoop
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CIDLoop:
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ldmia r1!, {r0}
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stmia r2!, {r0}
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subs r3, r3, #4
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bne CIDLoop
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bx lr
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bx lr
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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