summaryrefslogtreecommitdiffstats
path: root/examples/stubs.c
diff options
context:
space:
mode:
authorSascha Hauer <sha@octopus.labnet.pengutronix.de>2007-09-21 12:37:15 +0200
committerSascha Hauer <sha@octopus.labnet.pengutronix.de>2007-09-21 12:37:15 +0200
commit79f70b4fa0ec9c87d59e80d5734506bcf97b336f (patch)
treeeffbfa46a3d4c9c20a75e160788345bbad43a31d /examples/stubs.c
parent907195c4edad122fb5ec5cdf16e2aac0afd1ab6f (diff)
downloadbarebox-79f70b4fa0ec9c87d59e80d5734506bcf97b336f.tar.gz
barebox-79f70b4fa0ec9c87d59e80d5734506bcf97b336f.tar.xz
remove /examples dir
Diffstat (limited to 'examples/stubs.c')
-rw-r--r--examples/stubs.c191
1 files changed, 0 insertions, 191 deletions
diff --git a/examples/stubs.c b/examples/stubs.c
deleted file mode 100644
index ffd314e6b3..0000000000
--- a/examples/stubs.c
+++ /dev/null
@@ -1,191 +0,0 @@
-#include <exports.h>
-
-#ifndef GCC_VERSION
-#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
-#endif /* GCC_VERSION */
-
-#if defined(CONFIG_I386)
-/*
- * x86 does not have a dedicated register to store the pointer to
- * the global_data. Thus the jump table address is stored in a
- * global variable, but such approach does not allow for execution
- * from flash memory. The global_data address is passed as argv[-1]
- * to the application program.
- */
-static void **jt;
-gd_t *global_data;
-
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl " #x "\n" \
-#x ":\n" \
-" movl %0, %%eax\n" \
-" movl jt, %%ecx\n" \
-" jmp *(%%ecx, %%eax)\n" \
- : : "i"(XF_ ## x * sizeof(void *)) : "eax", "ecx");
-#elif defined(CONFIG_PPC)
-/*
- * r29 holds the pointer to the global_data, r11 is a call-clobbered
- * register
- */
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl " #x "\n" \
-#x ":\n" \
-" lwz %%r11, %0(%%r29)\n" \
-" lwz %%r11, %1(%%r11)\n" \
-" mtctr %%r11\n" \
-" bctr\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "r11");
-#elif defined(CONFIG_ARM)
-/*
- * r8 holds the pointer to the global_data, ip is a call-clobbered
- * register
- */
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl " #x "\n" \
-#x ":\n" \
-" ldr ip, [r8, %0]\n" \
-" ldr pc, [ip, %1]\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "ip");
-#elif defined(CONFIG_MIPS)
-/*
- * k0 ($26) holds the pointer to the global_data; t9 ($25) is a call-
- * clobbered register that is also used to set gp ($26). Note that the
- * jr instruction also executes the instruction immediately following
- * it; however, GCC/mips generates an additional `nop' after each asm
- * statement
- */
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl " #x "\n" \
-#x ":\n" \
-" lw $25, %0($26)\n" \
-" lw $25, %1($25)\n" \
-" jr $25\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "t9");
-#elif defined(CONFIG_NIOS)
-/*
- * %g7 holds the pointer to the global_data. %g0 is call clobbered.
- */
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl " #x "\n" \
-#x ":\n" \
-" pfx %%hi(%0)\n" \
-" movi %%g0, %%lo(%0)\n" \
-" add %%g0, %%g7\n" \
-" ld %%g0, [%%g0]\n" \
-" pfx %1\n" \
-" ld %%g0, [%%g0]\n" \
-" jmp %%g0\n" \
-" nop \n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x) : "r0");
-#elif defined(CONFIG_NIOS2)
-/*
- * r15 holds the pointer to the global_data, r8 is call-clobbered
- */
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl " #x "\n" \
-#x ":\n" \
-" movhi r8, %%hi(%0)\n" \
-" ori r8, r0, %%lo(%0)\n" \
-" add r8, r8, r15\n" \
-" ldw r8, 0(r8)\n" \
-" ldw r8, %1(r8)\n" \
-" jmp r8\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "r15");
-#elif defined(CONFIG_M68K)
-/*
- * d7 holds the pointer to the global_data, a0 is a call-clobbered
- * register
- */
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl " #x "\n" \
-#x ":\n" \
-" move.l %%d7, %%a0\n" \
-" adda.l %0, %%a0\n" \
-" move.l (%%a0), %%a0\n" \
-" adda.l %1, %%a0\n" \
-" move.l (%%a0), %%a0\n" \
-" jmp (%%a0)\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "a0");
-#elif defined(CONFIG_MICROBLAZE)
-/*
- * r31 holds the pointer to the global_data. r5 is a call-clobbered.
- */
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl " #x "\n" \
-#x ":\n" \
-" lwi r5, r31, %0\n" \
-" lwi r5, r5, %1\n" \
-" bra r5\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "r5");
-#elif defined(CONFIG_BLACKFIN)
-/*
- * P5 holds the pointer to the global_data, P0 is a call-clobbered
- * register
- */
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl " #x "\n" \
-#x ":\n" \
-" P0 = [P5 + %0]\n" \
-" P0 = [P0 + %1]\n" \
-" JUMP (P0)\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "P0");
-#elif defined(CONFIG_AVR32)
-/*
- * r6 holds the pointer to the global_data. r8 is call clobbered.
- */
-#define EXPORT_FUNC(x) \
- asm volatile( \
- " .globl\t" #x "\n" \
- #x ":\n" \
- " ld.w r8, r6[%0]\n" \
- " ld.w pc, r8[%1]\n" \
- : \
- : "i"(offsetof(gd_t, jt)), "i"(XF_ ##x) \
- : "r8");
-#else
-#error stubs definition missing for this architecture
-#endif
-
-/* This function is necessary to prevent the compiler from
- * generating prologue/epilogue, preparing stack frame etc.
- * The stub functions are special, they do not use the stack
- * frame passed to them, but pass it intact to the actual
- * implementation. On the other hand, asm() statements with
- * arguments can be used only inside the functions (gcc limitation)
- */
-#if GCC_VERSION < 3004
-static
-#endif /* GCC_VERSION */
-void __attribute__((unused)) dummy(void)
-{
-#include <_exports.h>
-}
-
-extern unsigned long __bss_start, _end;
-
-void app_startup(char **argv)
-{
- unsigned long * cp = &__bss_start;
-
- /* Zero out BSS */
- while (cp < &_end) {
- *cp++ = 0;
- }
-
-#if defined(CONFIG_I386)
- /* x86 does not have a dedicated register for passing global_data */
- global_data = (gd_t *)argv[-1];
- jt = global_data->jt;
-#endif
-}
-
-#undef EXPORT_FUNC