On Mon, Nov 13, 2023 at 08:00:35PM +0100, Uwe Kleine-König wrote:
> All callers apart from lib/uncompress.c itself only use memory-to-memory
> decompression. Simplify the calls accordingly.
>
> Note that two of three callers passed error_fn=NULL. As the uncompress
> function calls error_fn() unconditionally on error, this might yield
> undefined behaviour and so the new uncompress function uses
> uncompress_err_stdout() as error function which isn't worse for sure.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
> ---
> arch/arm/cpu/start.c | 2 +-
> arch/riscv/boot/start.c | 2 +-
> defaultenv/defaultenv.c | 4 +---
> include/uncompress.h | 7 +------
> lib/uncompress.c | 24 +++++++++++++++---------
> 5 files changed, 19 insertions(+), 20 deletions(-)
I had to revert this one. You missed one call site of uncompress() in
uimage_load(). That one can't be converted as it uses the fill argument
to uncompress().
Sascha
>
> diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
> index 15f5b2937227..65e1a0cce53b 100644
> --- a/arch/arm/cpu/start.c
> +++ b/arch/arm/cpu/start.c
> @@ -84,7 +84,7 @@ void *barebox_arm_boot_dtb(void)
> compressed_dtb->datalen_uncompressed);
> else
> ret = uncompress(compressed_dtb->data, compressed_dtb->datalen,
> - NULL, NULL, dtb, NULL, NULL);
> + dtb);
>
> if (ret) {
> pr_err("uncompressing dtb failed\n");
> diff --git a/arch/riscv/boot/start.c b/arch/riscv/boot/start.c
> index 92991d0f6a84..526012b9a43b 100644
> --- a/arch/riscv/boot/start.c
> +++ b/arch/riscv/boot/start.c
> @@ -59,7 +59,7 @@ void *barebox_riscv_boot_dtb(void)
> return NULL;
>
> ret = uncompress(compressed_dtb->data, compressed_dtb->datalen,
> - NULL, NULL, dtb, NULL, NULL);
> + dtb);
> if (ret) {
> pr_err("uncompressing dtb failed\n");
> free(dtb);
> diff --git a/defaultenv/defaultenv.c b/defaultenv/defaultenv.c
> index 055475eb4756..b1b042d724d7 100644
> --- a/defaultenv/defaultenv.c
> +++ b/defaultenv/defaultenv.c
> @@ -111,9 +111,7 @@ static int defaultenv_load_one(struct defaultenv *df, const char *dir,
> if (!freep)
> return -ENOMEM;
>
> - ret = uncompress(df->buf, df->size,
> - NULL, NULL,
> - freep, NULL, uncompress_err_stdout);
> + ret = uncompress(df->buf, df->size, freep)
> if (ret) {
> free(freep);
> pr_err("Failed to uncompress: %s\n", strerror(-ret));
> diff --git a/include/uncompress.h b/include/uncompress.h
> index 72ba1dfda607..c6ab2abde983 100644
> --- a/include/uncompress.h
> +++ b/include/uncompress.h
> @@ -2,12 +2,7 @@
> #ifndef __UNCOMPRESS_H
> #define __UNCOMPRESS_H
>
> -int uncompress(unsigned char *inbuf, int len,
> - int(*fill)(void*, unsigned int),
> - int(*flush)(void*, unsigned int),
> - unsigned char *output,
> - int *pos,
> - void(*error_fn)(char *x));
> +int uncompress(unsigned char *inbuf, int len, unsigned char *output);
>
> int uncompress_fd_to_fd(int infd, int outfd,
> void(*error_fn)(char *x));
> diff --git a/lib/uncompress.c b/lib/uncompress.c
> index 71ac882b87fe..8f7284ba68c0 100644
> --- a/lib/uncompress.c
> +++ b/lib/uncompress.c
> @@ -60,12 +60,12 @@ static int uncompress_fill(void *buf, unsigned int len)
> return total;
> }
>
> -int uncompress(unsigned char *inbuf, int len,
> - int(*fill)(void*, unsigned int),
> - int(*flush)(void*, unsigned int),
> - unsigned char *output,
> - int *pos,
> - void(*error_fn)(char *x))
> +static int __uncompress(unsigned char *inbuf, int len,
> + int(*fill)(void*, unsigned int),
> + int(*flush)(void*, unsigned int),
> + unsigned char *output,
> + int *pos,
> + void(*error_fn)(char *x))
> {
> enum filetype ft;
> int (*compfn)(unsigned char *inbuf, int len,
> @@ -139,6 +139,12 @@ int uncompress(unsigned char *inbuf, int len,
> return ret;
> }
>
> +int uncompress(unsigned char *inbuf, int len,
> + unsigned char *output)
> +{
> + return __uncompress(inbuf, len, NULL, NULL, output, NULL, uncompress_err_stdout);
> +}
> +
> static int uncompress_infd, uncompress_outfd;
>
> static int fill_fd(void *buf, unsigned int len)
> @@ -157,7 +163,7 @@ int uncompress_fd_to_fd(int infd, int outfd,
> uncompress_infd = infd;
> uncompress_outfd = outfd;
>
> - return uncompress(NULL, 0,
> + return __uncompress(NULL, 0,
> fill_fd,
> flush_fd,
> NULL,
> @@ -170,7 +176,7 @@ int uncompress_fd_to_buf(int infd, void *output,
> {
> uncompress_infd = infd;
>
> - return uncompress(NULL, 0, fill_fd, NULL, output, NULL, error_fn);
> + return __uncompress(NULL, 0, fill_fd, NULL, output, NULL, error_fn);
> }
>
> int uncompress_buf_to_fd(const void *input, size_t input_len,
> @@ -178,7 +184,7 @@ int uncompress_buf_to_fd(const void *input, size_t input_len,
> {
> uncompress_outfd = outfd;
>
> - return uncompress((void *)input, input_len, NULL, flush_fd,
> + return __uncompress((void *)input, input_len, NULL, flush_fd,
> NULL, NULL, error_fn);
> }
>
>
> base-commit: a9120f147631785fec30eb1e18615d8eabd3d087
> --
> 2.42.0
>
>
>
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