wutcrt: Fix the trap instruction and move it directly into __rpx_start

devkitPro · Feb 17, 2023 · 543fe4d · 543fe4d
1 parent 8b68eeb
commit 543fe4d
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Showing 2 changed files with 11 additions and 3 deletions.
diff --git a/libraries/wutcrt/crt0_rpx.s b/libraries/wutcrt/crt0_rpx.s
@@ -3,6 +3,7 @@
 .extern __init_wut
 .extern __fini_wut
 .extern __preinit_user
+.extern OSIsDebuggerInitialized
 
 .section .crt0, "ax", @progbits
 .global __rpx_start
@@ -12,6 +13,16 @@ __rpx_start:
    stw 0, 0x14(1)
    stw 3, 0x8(1)
    stw 4, 0xC(1)
+   bl OSIsDebuggerInitialized
+   cmpwi 3,0x0
+   beq init_wut
+   li 3, 2                  # DBGCTL_INIT_BREAKPOINT
+   lis 4, main@h            # Used for the initial bp if (((appFlags & 0x40) != 0) || ((appFlags & 0x10) != 0))
+   ori 4,4, main@l
+   lis 5, __init_wut@h      # Used for the initial bp if ((appFlags & 0x20) == 0)
+   ori 5,5, __init_wut@l
+   tw 0x1f, 30, 0           # DBGCTL_INSTRUCTION
+init_wut:
    bl __init_wut
    lwz 3, 0x8(1)
    lwz 4, 0xC(1)

diff --git a/libraries/wutcrt/wut_crt.c b/libraries/wutcrt/wut_crt.c
@@ -12,9 +12,6 @@ void __attribute__((weak)) __fini_wut_socket();
 void __attribute__((weak))
 __init_wut()
 {
-   if (OSIsDebuggerInitialized()) {
-      __asm__ __volatile__("tw 0x1f, 30, 0");
-   }
    __init_wut_newlib();
    __init_wut_stdcpp();
    __init_wut_devoptab();