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fusee_cpp: improved relocation logic
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commit
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1 changed files with 33 additions and 7 deletions
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@ -25,21 +25,49 @@ _ZN3ams6nxboot6loader5StartEv:
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/* Switch to system mode, mask all interrupts, clear all flags */
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/* Switch to system mode, mask all interrupts, clear all flags */
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msr cpsr_cxsf, #0xDF
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msr cpsr_cxsf, #0xDF
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/* Relocate loader stub. */
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/* Relocate main program. */
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ldr r0, =_ZN3ams6nxboot6loader5StartEv
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ldr r0, =_ZN3ams6nxboot6loader5StartEv
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adr r1, _ZN3ams6nxboot6loader5StartEv
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adr r1, _ZN3ams6nxboot6loader5StartEv
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cmp r0, r1
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beq 3f
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/* Relocate first 0x100. */
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mov r4, #0x100
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0:
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ldmia r1!, {r5-r12}
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stmia r0!, {r5-r12}
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subs r4, #0x20
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bne 0b
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/* Jump, continue relocating. */
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ldr r3, =1f
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bx r3
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1:
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ldr r4, =__loader_stub_lma__
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ldr r3, =__loader_stub_end__
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add r4, r4, r3
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ldr r3, =__loader_stub_start__
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sub r4, r4, r3
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sub r4, r4, r0
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2:
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ldmia r1!, {r5-r12}
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stmia r0!, {r5-r12}
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subs r4, #0x20
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bne 2b
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/* Relocate loader stub. */
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3:
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ldr r2, =__loader_stub_lma__
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ldr r2, =__loader_stub_lma__
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sub r2, r2, r0
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add r2, r2, r1
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ldr r3, =__loader_stub_start__
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ldr r3, =__loader_stub_start__
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ldr r4, =__loader_stub_end__
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ldr r4, =__loader_stub_end__
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sub r4, r4, r3
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sub r4, r4, r3
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0:
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4:
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ldmia r2!, {r5-r12}
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ldmia r2!, {r5-r12}
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stmia r3!, {r5-r12}
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stmia r3!, {r5-r12}
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subs r4, #0x20
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subs r4, #0x20
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bne 0b
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bne 4b
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/* Set the stack pointer */
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/* Set the stack pointer */
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ldr sp, =0x40001000
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ldr sp, =0x40001000
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@ -49,8 +77,6 @@ _ZN3ams6nxboot6loader5StartEv:
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ldr r3, =program_lz4
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ldr r3, =program_lz4
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ldr r4, =program_lz4_end
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ldr r4, =program_lz4_end
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sub r4, r4, r3
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sub r4, r4, r3
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sub r3, r3, r0
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add r3, r3, r1
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mov r0, r3
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mov r0, r3
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mov r1, r4
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mov r1, r4
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