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| author | Linus Nielsen Feltzing <linus@haxx.se> | 2002-04-24 11:06:41 +0000 |
|---|---|---|
| committer | Linus Nielsen Feltzing <linus@haxx.se> | 2002-04-24 11:06:41 +0000 |
| commit | cb9d09c80a3f9ae1c0f2094613d8b26add18bf0a (patch) | |
| tree | c4f6e79dcd822702a5022d4f8982f5ae45a563a1 | |
| parent | c602d3f39a3833a9b26e8f1f874c0c180d2f544a (diff) | |
| download | rockbox-cb9d09c80a3f9ae1c0f2094613d8b26add18bf0a.tar.gz rockbox-cb9d09c80a3f9ae1c0f2094613d8b26add18bf0a.zip | |
Protected the temporary register in the context switches
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@210 a1c6a512-1295-4272-9138-f99709370657
| -rw-r--r-- | firmware/thread.c | 62 |
1 files changed, 33 insertions, 29 deletions
diff --git a/firmware/thread.c b/firmware/thread.c index 97e2d2173e..9d3f43afc2 100644 --- a/firmware/thread.c +++ b/firmware/thread.c | |||
| @@ -46,20 +46,22 @@ static thread_t threads = {1, 0}; | |||
| 46 | */ | 46 | */ |
| 47 | static inline void stctx(void* addr) | 47 | static inline void stctx(void* addr) |
| 48 | { | 48 | { |
| 49 | asm volatile ("mov.l r8, @(0, %0)\n\t" | 49 | unsigned int tmp; |
| 50 | "mov.l r9, @(4, %0)\n\t" | 50 | |
| 51 | "mov.l r10, @(8, %0)\n\t" | 51 | asm volatile ("mov.l r8, @(0, %1)\n\t" |
| 52 | "mov.l r11, @(12, %0)\n\t" | 52 | "mov.l r9, @(4, %1)\n\t" |
| 53 | "mov.l r12, @(16, %0)\n\t" | 53 | "mov.l r10, @(8, %1)\n\t" |
| 54 | "mov.l r13, @(20, %0)\n\t" | 54 | "mov.l r11, @(12, %1)\n\t" |
| 55 | "mov.l r14, @(24, %0)\n\t" | 55 | "mov.l r12, @(16, %1)\n\t" |
| 56 | "mov.l r15, @(28, %0)\n\t" | 56 | "mov.l r13, @(20, %1)\n\t" |
| 57 | "stc sr, r0\n\t" | 57 | "mov.l r14, @(24, %1)\n\t" |
| 58 | "mov.l r0, @(32, %0)\n\t" | 58 | "mov.l r15, @(28, %1)\n\t" |
| 59 | "stc gbr, r0\n\t" | 59 | "stc sr, %0\n\t" |
| 60 | "mov.l r0, @(36, %0)\n\t" | 60 | "mov.l %0, @(32, %1)\n\t" |
| 61 | "sts pr, r0\n\t" | 61 | "stc gbr, %0\n\t" |
| 62 | "mov.l r0, @(40, %0)" :: "r" (addr)); | 62 | "mov.l %0, @(36, %1)\n\t" |
| 63 | "sts pr, %0\n\t" | ||
| 64 | "mov.l %0, @(40, %1)" : "=r&" (tmp) : "r" (addr)); | ||
| 63 | } | 65 | } |
| 64 | 66 | ||
| 65 | /*--------------------------------------------------------------------------- | 67 | /*--------------------------------------------------------------------------- |
| @@ -68,21 +70,23 @@ static inline void stctx(void* addr) | |||
| 68 | */ | 70 | */ |
| 69 | static inline void ldctx(void* addr) | 71 | static inline void ldctx(void* addr) |
| 70 | { | 72 | { |
| 71 | asm volatile ("mov.l @(0, %0), r8\n\t" | 73 | unsigned int tmp; |
| 72 | "mov.l @(4, %0), r9\n\t" | 74 | |
| 73 | "mov.l @(8, %0), r10\n\t" | 75 | asm volatile ("mov.l @(0, %1), r8\n\t" |
| 74 | "mov.l @(12, %0), r11\n\t" | 76 | "mov.l @(4, %1), r9\n\t" |
| 75 | "mov.l @(16, %0), r12\n\t" | 77 | "mov.l @(8, %1), r10\n\t" |
| 76 | "mov.l @(20, %0), r13\n\t" | 78 | "mov.l @(12, %1), r11\n\t" |
| 77 | "mov.l @(24, %0), r14\n\t" | 79 | "mov.l @(16, %1), r12\n\t" |
| 78 | "mov.l @(28, %0), r15\n\t" | 80 | "mov.l @(20, %1), r13\n\t" |
| 79 | "mov.l @(32, %0), r0\n\t" | 81 | "mov.l @(24, %1), r14\n\t" |
| 80 | "ldc r0, sr\n\t" | 82 | "mov.l @(28, %1), r15\n\t" |
| 81 | "mov.l @(36, %0), r0\n\t" | 83 | "mov.l @(32, %1), r0\n\t" |
| 82 | "ldc r0, gbr\n\t" | 84 | "ldc %0, sr\n\t" |
| 83 | "mov.l @(40, %0), r0\n\t" | 85 | "mov.l @(36, %1), %0\n\t" |
| 84 | "lds r0, pr\n\t" | 86 | "ldc %0, gbr\n\t" |
| 85 | "mov.l r0, @(0, r15)" :: "r" (addr)); | 87 | "mov.l @(40, %1), %0\n\t" |
| 88 | "lds %0, pr\n\t" | ||
| 89 | "mov.l %0, @(0, r15)" : "=r&" (tmp) : "r" (addr)); | ||
| 86 | } | 90 | } |
| 87 | 91 | ||
| 88 | /*--------------------------------------------------------------------------- | 92 | /*--------------------------------------------------------------------------- |