vfs: semihost driver bugfix
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parent
ef47839628
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283026a761
2 changed files with 3 additions and 3 deletions
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@ -223,7 +223,7 @@ static ssize_t vfs_semihost_write(void* ctx, int fd, const void * data, size_t s
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if (ret == -1) {
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if (ret == -1) {
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errno = host_err;
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errno = host_err;
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}
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}
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return (ssize_t)ret;
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return size - (ssize_t)ret; /* Write syscall returns the number of bytes NOT written */
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}
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}
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static ssize_t vfs_semihost_read(void* ctx, int fd, void* data, size_t size)
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static ssize_t vfs_semihost_read(void* ctx, int fd, void* data, size_t size)
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@ -237,7 +237,7 @@ static ssize_t vfs_semihost_read(void* ctx, int fd, void* data, size_t size)
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errno = host_err;
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errno = host_err;
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return ret;
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return ret;
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}
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}
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return size - (ssize_t)ret; /* Write syscall returns the number of bytes NOT written */
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return size - (ssize_t)ret; /* Read syscall returns the number of bytes NOT read */
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}
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}
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@ -39,7 +39,7 @@ void app_main(void)
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return;
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return;
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}
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}
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// Increase file buffer to perform data transfers using larger chunks.
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// Increase file buffer to perform data transfers using larger chunks.
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// Every read/write triggers breakpoint, so transfering of small chunks is quite inefficient.
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// Every read/write triggers breakpoint, so transferring of small chunks is quite inefficient.
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setvbuf(fout, (char *)s_buf, _IOFBF, sizeof(s_buf));
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setvbuf(fout, (char *)s_buf, _IOFBF, sizeof(s_buf));
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// this will be printed to the file on host
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// this will be printed to the file on host
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