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target/xtensa: support for bFLT binaries

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- add support for bFLT binaries for target/xtensa
 - fix per-architecture target_flat.h customization
 - fix initial stack pointer for bFLT
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Merge remote-tracking branch 'remotes/xtensa/tags/20181030-xtensa' into staging

target/xtensa: support for bFLT binaries

- add support for bFLT binaries for target/xtensa
- fix per-architecture target_flat.h customization
- fix initial stack pointer for bFLT

# gpg: Signature made Tue 30 Oct 2018 18:27:42 GMT
# gpg:                using RSA key 51F9CC91F83FA044
# gpg: Good signature from "Max Filippov <filippov@cadence.com>"
# gpg:                 aka "Max Filippov <max.filippov@cogentembedded.com>"
# gpg:                 aka "Max Filippov <jcmvbkbc@gmail.com>"
# Primary key fingerprint: 2B67 854B 98E5 327D CDEB  17D8 51F9 CC91 F83F A044

* remotes/xtensa/tags/20181030-xtensa:
  linux-user/flatload: fix initial stack pointer alignment
  linux-user: xtensa: enable bFLT support

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-10-31 16:11:43 +00:00
commit 7d51a855cd
3 changed files with 15 additions and 4 deletions
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1
configure vendored
View File

@ -7105,6 +7105,7 @@ case "$target_name" in
;;
xtensa|xtensaeb)
TARGET_ARCH=xtensa
bflt="yes"
mttcg="yes"
target_compiler=$cross_cc_xtensa
;;

8
linux-user/flatload.c
View File

@ -37,7 +37,7 @@
#include "qemu.h"
#include "flat.h"
#include "target_flat.h"
#include <target_flat.h>
//#define DEBUG
@ -771,10 +771,10 @@ int load_flt_binary(struct linux_binprm *bprm, struct image_info *info)
/* Enforce final stack alignment of 16 bytes. This is sufficient
for all current targets, and excess alignment is harmless. */
stack_len = bprm->envc + bprm->argc + 2;
stack_len += 3; /* argc, arvg, argp */
stack_len += flat_argvp_envp_on_stack() ? 2 : 0; /* arvg, argp */
stack_len += 1; /* argc */
stack_len *= sizeof(abi_ulong);
if ((sp + stack_len) & 15)
sp -= 16 - ((sp + stack_len) & 15);
sp -= (sp - stack_len) & 15;
sp = loader_build_argptr(bprm->envc, bprm->argc, sp, p,
flat_argvp_envp_on_stack());

10
linux-user/xtensa/target_flat.h Normal file
View File

@ -0,0 +1,10 @@
/* If your arch needs to do custom stuff, create your own target_flat.h
* header file in linux-user/<your arch>/
*/
#define flat_argvp_envp_on_stack() 0
#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
#define flat_old_ram_flag(flag) (flag)
#define flat_get_relocate_addr(relval) (relval)
#define flat_get_addr_from_rp(rp, relval, flags, persistent) (rp)
#define flat_set_persistent(relval, persistent) (*persistent)
#define flat_put_addr_at_rp(rp, addr, relval) put_user_ual(addr, rp)