From 80445331528a5d1b0ce85f095fe27a3b7fdf5a9e Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Tue, 18 Jul 1995 19:27:50 +0000
Subject: merged Linux UNIX simulator support (C)

---
 c/src/exec/score/cpu/i386/cpu.c  |  3 +--
 c/src/exec/score/cpu/unix/cpu.c  | 22 ++++++++++++++++++++++
 c/src/exec/score/cpu/unix/cpu.h  | 25 ++++++++++++++++++++++++-
 c/src/exec/score/cpu/unix/unix.h |  8 ++++++--
 cpukit/score/cpu/i386/cpu.c      |  3 +--
 cpukit/score/cpu/unix/cpu.c      | 22 ++++++++++++++++++++++
 6 files changed, 76 insertions(+), 7 deletions(-)

diff --git a/c/src/exec/score/cpu/i386/cpu.c b/c/src/exec/score/cpu/i386/cpu.c
index f2859230e2..cf30fd0b94 100644
--- a/c/src/exec/score/cpu/i386/cpu.c
+++ b/c/src/exec/score/cpu/i386/cpu.c
@@ -73,7 +73,6 @@ void _CPU_Initialize(
  */
  
 #if __GO32__
-#include <cpu.h>
 #include <go32.h>
 #include <dpmi.h>
 #endif /* __GO32__ */
@@ -89,7 +88,7 @@ void _CPU_ISR_install_raw_handler(
  
     *old_handler =  0;    /* XXX not supported */
 
-    handler_info.pm_offset = new_handler;
+    handler_info.pm_offset = (u_long) new_handler;
     handler_info.pm_selector = _go32_my_cs();
 
     /* install the IDT entry */
diff --git a/c/src/exec/score/cpu/unix/cpu.c b/c/src/exec/score/cpu/unix/cpu.c
index acd53e3fd2..a7e1b3bfce 100644
--- a/c/src/exec/score/cpu/unix/cpu.c
+++ b/c/src/exec/score/cpu/unix/cpu.c
@@ -391,6 +391,28 @@ void _CPU_Context_Initialize(
   *(addr + RP_OFF) = jmp_addr + ADDR_ADJ_OFFSET;
   *(addr + SP_OFF) = (unsigned32)(_stack_high - CPU_FRAME_SIZE);
   *(addr + FP_OFF) = (unsigned32)(_stack_high);
+
+#elif defined(i386)
+ 
+    /*
+     *  This information was gathered by disassembling setjmp().
+     */
+ 
+    stack_ptr = _stack_high - CPU_FRAME_SIZE;
+    *(addr + EBX_OFF) = 0xFEEDFEED;
+    *(addr + ESI_OFF) = 0xDEADDEAD;
+    *(addr + EDI_OFF) = 0xDEAFDEAF;
+    *(addr + EBP_OFF) = stack_ptr;
+    *(addr + ESP_OFF) = stack_ptr;
+    *(addr + RET_OFF) = jmp_addr;
+ 
+ 
+    addr = (unsigned32 *) stack_ptr;
+ 
+    addr[ 0 ] = jmp_addr;
+    addr[ 1 ] = (unsigned32) stack_ptr;
+    addr[ 2 ] = (unsigned32) stack_ptr;
+
 #else
 #error "UNKNOWN CPU!!!"
 #endif
diff --git a/c/src/exec/score/cpu/unix/cpu.h b/c/src/exec/score/cpu/unix/cpu.h
index 091f0915b6..90eb6f5216 100644
--- a/c/src/exec/score/cpu/unix/cpu.h
+++ b/c/src/exec/score/cpu/unix/cpu.h
@@ -264,7 +264,7 @@ extern "C" {
 
 #if defined(hppa1_1)
 #define CPU_STACK_GROWS_UP               TRUE
-#elif defined(sparc)
+#elif defined(sparc) || defined(i386)
 #define CPU_STACK_GROWS_UP               FALSE
 #else
 #error "unknown CPU!!"
@@ -362,6 +362,27 @@ extern "C" {
 #endif
 #endif
 
+#if defined(i386)
+ 
+#ifdef RTEMS_NEWLIB
+#error "Newlib not installed"
+#endif
+ 
+/*
+ *  For Linux 1.1
+ */
+ 
+#ifdef RTEMS_UNIXLIB
+#define EBX_OFF    0
+#define ESI_OFF    1
+#define EDI_OFF    2
+#define EBP_OFF    3
+#define ESP_OFF    4
+#define RET_OFF    5
+#endif
+ 
+#endif
+ 
 #if defined(sparc)
 
 /*
@@ -515,6 +536,8 @@ EXTERN void           (*_CPU_Thread_dispatch_pointer)();
 #define CPU_FRAME_SIZE  (32 * 4)
 #elif defined(sparc)
 #define CPU_FRAME_SIZE  (112)   /* based on disassembled test code */
+#elif defined(i386)
+#define CPU_FRAME_SIZE  (24)  /* return address, sp, and bp pushed plus fudge */
 #else
 #error "Unknown CPU!!!"
 #endif
diff --git a/c/src/exec/score/cpu/unix/unix.h b/c/src/exec/score/cpu/unix/unix.h
index 10c4b6917c..91afec9517 100644
--- a/c/src/exec/score/cpu/unix/unix.h
+++ b/c/src/exec/score/cpu/unix/unix.h
@@ -64,11 +64,15 @@ extern "C" {
  
 #if defined(hpux)
  
-#define RTEMS_MODEL_NAME  "hpux"
+#define RTEMS_MODEL_NAME  "HP-UX"
  
 #elif defined(solaris)
  
-#define RTEMS_MODEL_NAME  "solaris"
+#define RTEMS_MODEL_NAME  "Solaris"
+ 
+#elif defined(linux)
+ 
+#define RTEMS_MODEL_NAME  "Linux"
  
 #else
  
diff --git a/cpukit/score/cpu/i386/cpu.c b/cpukit/score/cpu/i386/cpu.c
index f2859230e2..cf30fd0b94 100644
--- a/cpukit/score/cpu/i386/cpu.c
+++ b/cpukit/score/cpu/i386/cpu.c
@@ -73,7 +73,6 @@ void _CPU_Initialize(
  */
  
 #if __GO32__
-#include <cpu.h>
 #include <go32.h>
 #include <dpmi.h>
 #endif /* __GO32__ */
@@ -89,7 +88,7 @@ void _CPU_ISR_install_raw_handler(
  
     *old_handler =  0;    /* XXX not supported */
 
-    handler_info.pm_offset = new_handler;
+    handler_info.pm_offset = (u_long) new_handler;
     handler_info.pm_selector = _go32_my_cs();
 
     /* install the IDT entry */
diff --git a/cpukit/score/cpu/unix/cpu.c b/cpukit/score/cpu/unix/cpu.c
index acd53e3fd2..a7e1b3bfce 100644
--- a/cpukit/score/cpu/unix/cpu.c
+++ b/cpukit/score/cpu/unix/cpu.c
@@ -391,6 +391,28 @@ void _CPU_Context_Initialize(
   *(addr + RP_OFF) = jmp_addr + ADDR_ADJ_OFFSET;
   *(addr + SP_OFF) = (unsigned32)(_stack_high - CPU_FRAME_SIZE);
   *(addr + FP_OFF) = (unsigned32)(_stack_high);
+
+#elif defined(i386)
+ 
+    /*
+     *  This information was gathered by disassembling setjmp().
+     */
+ 
+    stack_ptr = _stack_high - CPU_FRAME_SIZE;
+    *(addr + EBX_OFF) = 0xFEEDFEED;
+    *(addr + ESI_OFF) = 0xDEADDEAD;
+    *(addr + EDI_OFF) = 0xDEAFDEAF;
+    *(addr + EBP_OFF) = stack_ptr;
+    *(addr + ESP_OFF) = stack_ptr;
+    *(addr + RET_OFF) = jmp_addr;
+ 
+ 
+    addr = (unsigned32 *) stack_ptr;
+ 
+    addr[ 0 ] = jmp_addr;
+    addr[ 1 ] = (unsigned32) stack_ptr;
+    addr[ 2 ] = (unsigned32) stack_ptr;
+
 #else
 #error "UNKNOWN CPU!!!"
 #endif
-- 
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