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Applied patch from Larry Doolittle to give users the third option of putting

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buffers in BSS (in addition to stack and heap).
This commit is contained in:
Mark Whitley 2001-04-20 17:40:33 +00:00
parent 6ebd633829
commit 3e310ac309
3 changed files with 15 additions and 0 deletions
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5
Config.h
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@ -144,6 +144,11 @@
// them put on the stack. For some very small machines with limited stack
// space, this can be deadly. For most folks, this works just fine...
//#define BB_FEATURE_BUFFERS_GO_ON_STACK
// The third alternative for buffer allocation is to use BSS. This works
// beautifully for computers with a real MMU (and OS support), but wastes
// runtime RAM for uCLinux. This behavior was the only one available for
// BusyBox versions 0.48 and earlier.
//#define BB_FEATURE_BUFFERS_GO_IN_BSS
//
// Turn this on to use Erik's very cool devps, and devmtab kernel drivers,
// thereby eliminating the need for the /proc filesystem and thereby saving

5
busybox.h
View File

@ -72,9 +72,14 @@ extern const char *applet_name;
#define RESERVE_BB_BUFFER(buffer,len) char buffer[len]
#define RESERVE_BB_UBUFFER(buffer,len) unsigned char buffer[len]
#else
#ifdef BB_FEATURE_BUFFERS_GO_IN_BSS
#define RESERVE_BB_BUFFER(buffer,len) static char buffer[len]
#define RESERVE_BB_UBUFFER(buffer,len) static unsigned char buffer[len]
#else
#define RESERVE_BB_BUFFER(buffer,len) char *buffer=xmalloc(len)
#define RESERVE_BB_UBUFFER(buffer,len) unsigned char *buffer=xmalloc(len)
#endif
#endif
/* Bit map related macros -- libc5 doens't provide these... sigh. */

5
include/busybox.h
View File

@ -72,9 +72,14 @@ extern const char *applet_name;
#define RESERVE_BB_BUFFER(buffer,len) char buffer[len]
#define RESERVE_BB_UBUFFER(buffer,len) unsigned char buffer[len]
#else
#ifdef BB_FEATURE_BUFFERS_GO_IN_BSS
#define RESERVE_BB_BUFFER(buffer,len) static char buffer[len]
#define RESERVE_BB_UBUFFER(buffer,len) static unsigned char buffer[len]
#else
#define RESERVE_BB_BUFFER(buffer,len) char *buffer=xmalloc(len)
#define RESERVE_BB_UBUFFER(buffer,len) unsigned char *buffer=xmalloc(len)
#endif
#endif
/* Bit map related macros -- libc5 doens't provide these... sigh. */