From d217893e06bd7f5bcf2d43fdfd1e38ce595468f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Trung=20L=C3=AA?= <8@tle.id.au>
Date: Sun, 1 Mar 2026 00:39:37 +1100
Subject: [PATCH] Add ppc64le architecture support for ptrace process tracing

On ppc64le (PowerPC 64-bit little-endian), the register struct is
pt_regs (from asm/ptrace.h) rather than user_regs_struct, and the
instruction pointer register is 'nip'. Without this, the code falls
through to the x86 #else branch which fails to compile because
user_regs_struct does not exist on ppc64le.

Define the appropriate macros:
- Map user_regs_struct to pt_regs
- Set INST_PTR_REG to nip
- Set BREAK_INST to 0x7fe00008 (ppc64 trap instruction)
- Set BREAK_INST_BYTES_SIZE to 4
- Set BREAK_INST_INST_PTR_ADJUST to 0
---
 renderdoc/os/posix/linux/linux_process.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/renderdoc/os/posix/linux/linux_process.cpp b/renderdoc/os/posix/linux/linux_process.cpp
index 73510e2f7..c9eece97b 100644
--- a/renderdoc/os/posix/linux/linux_process.cpp
+++ b/renderdoc/os/posix/linux/linux_process.cpp
@@ -243,6 +243,16 @@ static uint64_t get_nanotime()
 #define BREAK_INST_BYTES_SIZE 4
 #define BREAK_INST_INST_PTR_ADJUST 4
 
+#elif defined(__powerpc64__)
+
+#define user_regs_struct pt_regs
+#define INST_PTR_REG nip
+
+// trap instruction on ppc64
+#define BREAK_INST 0x7fe00008ULL
+#define BREAK_INST_BYTES_SIZE 4
+#define BREAK_INST_INST_PTR_ADJUST 0
+
 #else
 
 #define BREAK_INST 0xccULL