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https://codeberg.org/canoeboot/cbmk.git
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86 lines
2.8 KiB
Diff
86 lines
2.8 KiB
Diff
From 2aff8adc1dcd1315877fdb4ac4ef5e649c5b7d11 Mon Sep 17 00:00:00 2001
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From: Riku Viitanen <riku.viitanen@protonmail.com>
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Date: Sat, 10 Feb 2024 21:23:33 +0200
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Subject: [PATCH 1/2] romfile: implement a generic loader
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romfile_loadfile_g:
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Based on romfile_loadfile but more flexible. User has to supply pointer
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to a malloc function and the number of trailing padding bytes. Thus, any
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memory region may be used.
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romfile_loadfile:
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It is now a wrapper around romfile_loadfile_g. Functionality is the same.
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Signed-off-by: Riku Viitanen <riku.viitanen@protonmail.com>
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---
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src/romfile.c | 25 ++++++++++++++++++++-----
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src/romfile.h | 2 ++
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2 files changed, 22 insertions(+), 5 deletions(-)
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diff --git a/src/romfile.c b/src/romfile.c
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index b598274e..8bf95713 100644
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--- a/src/romfile.c
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+++ b/src/romfile.c
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@@ -47,10 +47,12 @@ romfile_find(const char *name)
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return __romfile_findprefix(name, strlen(name) + 1, NULL);
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}
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-// Helper function to find, malloc_tmphigh, and copy a romfile. This
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-// function adds a trailing zero to the malloc'd copy.
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+// Generic function to find romfile, malloc (using provided function
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+// pointer), and copy a romfile. add_len specifies how many additional
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+// trailing bytes to reserve. The extra bytes will not be initialised.
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void *
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-romfile_loadfile(const char *name, int *psize)
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+romfile_loadfile_g(const char *name, int *psize,
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+ void *(*malloc_fn)(), int add_len)
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{
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struct romfile_s *file = romfile_find(name);
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if (!file)
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@@ -60,7 +62,7 @@ romfile_loadfile(const char *name, int *psize)
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if (!filesize)
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return NULL;
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- char *data = malloc_tmphigh(filesize+1);
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+ char *data = malloc_fn(filesize+add_len);
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if (!data) {
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warn_noalloc();
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return NULL;
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@@ -74,7 +76,20 @@ romfile_loadfile(const char *name, int *psize)
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}
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if (psize)
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*psize = filesize;
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- data[filesize] = '\0';
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+
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+ return data;
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+}
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+
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+// Helper function to find, malloc_tmphigh, and copy a romfile. This
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+// function adds a trailing zero to the malloc'd copy.
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+void *
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+romfile_loadfile(const char *name, int *psize)
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+{
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+ char *data = romfile_loadfile_g(name, psize, &malloc_tmphigh, 1);
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+ if (!data)
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+ return NULL;
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+
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+ data[*psize] = '\0';
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return data;
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}
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diff --git a/src/romfile.h b/src/romfile.h
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index 3e0f8200..a320a5bc 100644
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--- a/src/romfile.h
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+++ b/src/romfile.h
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@@ -13,6 +13,8 @@ struct romfile_s {
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void romfile_add(struct romfile_s *file);
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struct romfile_s *romfile_findprefix(const char *prefix, struct romfile_s *prev);
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struct romfile_s *romfile_find(const char *name);
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+void *romfile_loadfile_g(const char *name, int *psize,
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+ void *(*malloc_fn)(), int add_len);
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void *romfile_loadfile(const char *name, int *psize);
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u64 romfile_loadint(const char *name, u64 defval);
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--
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2.43.0
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