d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Declare the global kernel symbols created by ldscript.arm in arm's machdep.h,

Browse Source 
and remove a couple scattered local declarations.

Most of these aren't referenced in C code (there are some references in
asm code), and they also aren't documented anywhere.  This helps a bit
with the latter.
This commit is contained in:
Ian Lepore 2019-12-06 03:48:35 +00:00
parent 19cfcf253e
commit e214f286f0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=355439
3 changed files with 24 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sys/arm/arm/mp_machdep.c
View File

@ -106,8 +106,6 @@ check_ap(void)
return (-2);
}
extern unsigned char _end[];
/* Initialize and fire up non-boot processors */
void
cpu_mp_start(void)

13
sys/arm/arm/unwind.c
View File

@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
#include <sys/systm.h>
#include <sys/linker.h>
#include <machine/machdep.h>
#include <machine/stack.h>
#include "linker_if.h"
@ -60,12 +61,6 @@ __FBSDID("$FreeBSD$");
/* A special case when we are unable to unwind past this function */
#define EXIDX_CANTUNWIND 1
/*
* These are set in the linker script. Their addresses will be
* either the start or end of the exception table or index.
*/
extern int exidx_start, exidx_end;
/*
* Entry types.
* These are the only entry types that have been seen in the kernel.
@ -154,9 +149,9 @@ find_index(uint32_t addr, int search_modules)
int32_t prel31_addr;
uint32_t func_addr;
start = (struct unwind_idx *)&exidx_start;
idx_start = (caddr_t)&exidx_start;
idx_end = (caddr_t)&exidx_end;
start = (struct unwind_idx *)&_exidx_start;
idx_start = (caddr_t)&_exidx_start;
idx_end = (caddr_t)&_exidx_end;
/* This may acquire a lock */
if (search_modules) {

20
sys/arm/include/machdep.h
View File

@ -61,4 +61,24 @@ void arm_add_efi_map_entries(struct efi_map_header *efihdr,
struct mem_region *mr, int *mrcnt);
#endif
/*
* Symbols created by ldscript.arm which are accessible in the kernel as global
* symbols. They have uint8 type because they mark the byte location where the
* corresponding data starts or ends (in the end case, it's the next byte
* following the data, so the data size is end-start). These are listed below
* in the order they occur within the kernel (i.e., the address of each variable
* should be greater than any of the ones before it).
*/
extern uint8_t _start; /* Kernel entry point in locore.S */
extern uint8_t _etext; /* text segment end */
extern uint8_t _extab_start; /* unwind table start */
extern uint8_t _exidx_start; /* unwind index start */
extern uint8_t _exidx_end; /* unwind index end */
extern uint8_t _start_ctors; /* ctors data start */
extern uint8_t _stop_ctors; /* ctors data end */
extern uint8_t _edata; /* data segment end */
extern uint8_t __bss_start; /* bss segment start */
extern uint8_t _ebss; /* bss segment end */
extern uint8_t _end; /* End of kernel (text+ctors+unwind+data+bss) */
#endif /* !_MACHINE_MACHDEP_H_ */