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authorJonathan Liu <net147@gmail.com>2014-02-02 15:58:52 +1100
committerRichard Purdie <richard.purdie@linuxfoundation.org>2014-02-02 11:22:08 +0000
commit4a8ddd8379527705ec8828c9c8e1c9b29a6a4152 (patch)
tree99fb2b31dc0c55d9cddc0680a4616af09ced05e1
parent1ae1b2885177e29324b6758cb8c123ab7cdbaf9b (diff)
downloadpoky-4a8ddd8379527705ec8828c9c8e1c9b29a6a4152.tar.gz
syslinux: fix booting memtest86+ using pxelinux regression
After syslinux was updated from 4.07 to 6.01, booting memtest86+ using pxelinux would fail: PXELINUX 6.01 2013-07-04 Copyright (C) 1994-2013 H. Peter Anvin et al Loading memtest86... ok Booting kernel failed: invalid argument This backports the necessary upstream patches to allow memtest86+ to boot using pxelinux again. [YOCTO #5501] (From OE-Core rev: ed9ccb8622b347173602be8b2126324d4fdf54d8) Signed-off-by: Jonathan Liu <net147@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat
-rw-r--r--meta/recipes-devtools/syslinux/files/0001-movebits-Add-SMT_TERMINAL-a-last-resort-region-type.patch50
-rw-r--r--meta/recipes-devtools/syslinux/files/0002-memscan-build-a-linked-list-of-memory-scanners.patch450
-rw-r--r--meta/recipes-devtools/syslinux/files/0003-PXELINUX-Add-bios-memscan-function.patch87
-rw-r--r--meta/recipes-devtools/syslinux/files/0004-pxe-use-bios_fbm-and-real_base_mem-to-calculate-free.patch65
-rw-r--r--meta/recipes-devtools/syslinux/syslinux_6.01.bb6
5 files changed, 657 insertions, 1 deletions
diff --git a/meta/recipes-devtools/syslinux/files/0001-movebits-Add-SMT_TERMINAL-a-last-resort-region-type.patch b/meta/recipes-devtools/syslinux/files/0001-movebits-Add-SMT_TERMINAL-a-last-resort-region-type.patch
new file mode 100644
index 0000000000..fb03bbfe2c
--- /dev/null
+++ b/meta/recipes-devtools/syslinux/files/0001-movebits-Add-SMT_TERMINAL-a-last-resort-region-type.patch
@@ -0,0 +1,50 @@
1Upstream-Status: Backport [ba638fd9bf72b0c786c88909014136cfa641a147]
2Signed-off-by: Jonathan Liu <net147@gmail.com>
3
4From b663fd7257481438256f8267831dc10b06363b22 Mon Sep 17 00:00:00 2001
5From: Matt Fleming <matt.fleming@intel.com>
6Date: Tue, 16 Jul 2013 22:16:11 +0100
7Subject: [PATCH 1/4] movebits: Add SMT_TERMINAL - a last resort region type
8
9Some memory regions are usable, but only as a last resort just before we
10hand over control to a kernel image. Add the necessary movebits
11infrastructure to use these regions when all other options have been
12exhausted.
13
14Signed-off-by: Matt Fleming <matt.fleming@intel.com>
15
16Conflicts:
17 com32/lib/syslinux/zonelist.c
18---
19 com32/include/syslinux/movebits.h | 1 +
20 com32/lib/syslinux/movebits.c | 2 +-
21 2 files changed, 2 insertions(+), 1 deletion(-)
22
23diff --git a/com32/include/syslinux/movebits.h b/com32/include/syslinux/movebits.h
24index 8bcdf3e..114a896 100644
25--- a/com32/include/syslinux/movebits.h
26+++ b/com32/include/syslinux/movebits.h
27@@ -34,6 +34,7 @@ enum syslinux_memmap_types {
28 SMT_RESERVED, /* Unusable memory */
29 SMT_ALLOC, /* Memory allocated by user */
30 SMT_ZERO, /* Memory that should be zeroed */
31+ SMT_TERMINAL, /* Memory to be used as a last resort */
32 };
33
34 struct syslinux_memmap {
35diff --git a/com32/lib/syslinux/movebits.c b/com32/lib/syslinux/movebits.c
36index 7a05f3c..8ffdc63 100644
37--- a/com32/lib/syslinux/movebits.c
38+++ b/com32/lib/syslinux/movebits.c
39@@ -160,7 +160,7 @@ static const struct syslinux_memmap *is_free_zone(const struct syslinux_memmap
40 if (list->start <= start) {
41 if (llast >= last) {
42 /* Chunk has a single, well-defined type */
43- if (list->type == SMT_FREE) {
44+ if (list->type == SMT_FREE || list->type == SMT_TERMINAL) {
45 dprintf("F: 0x%08x bytes at 0x%08x\n",
46 list->next->start, list->start);
47 return list; /* It's free */
48--
491.8.5.3
50
diff --git a/meta/recipes-devtools/syslinux/files/0002-memscan-build-a-linked-list-of-memory-scanners.patch b/meta/recipes-devtools/syslinux/files/0002-memscan-build-a-linked-list-of-memory-scanners.patch
new file mode 100644
index 0000000000..48d3955910
--- /dev/null
+++ b/meta/recipes-devtools/syslinux/files/0002-memscan-build-a-linked-list-of-memory-scanners.patch
@@ -0,0 +1,450 @@
1Upstream-Status: Backport [787d7e568fe08d7080d2cd03cd9ee27c327eca67]
2Signed-off-by: Jonathan Liu <net147@gmail.com>
3
4From 2e05f34c0c5bc0144bb203a169009dfb6837b4e3 Mon Sep 17 00:00:00 2001
5From: Matt Fleming <matt.fleming@intel.com>
6Date: Wed, 17 Jul 2013 12:15:16 +0100
7Subject: [PATCH 2/4] memscan: build a linked list of memory scanners
8
9By registering memory scanners at runtime we can support multiple memory
10scanner functions, which helps us to isolate them and keep things
11modular, only registering them for specific platform/derivative
12combinations. This is preparation for adding a memory scanner that is
13specific to PXELINUX on bios and understands when the memory region
14occupied by the PXE stack can be reused.
15
16Signed-off-by: Matt Fleming <matt.fleming@intel.com>
17
18Conflicts:
19 com32/include/syslinux/memscan.h
20 com32/lib/syslinux/memscan.c
21---
22 com32/include/syslinux/firmware.h | 4 +-
23 com32/include/syslinux/memscan.h | 14 +++-
24 com32/lib/syslinux/memscan.c | 143 +++++++-------------------------------
25 core/bios.c | 125 ++++++++++++++++++++++++++++++++-
26 efi/main.c | 14 ++--
27 5 files changed, 173 insertions(+), 127 deletions(-)
28
29diff --git a/com32/include/syslinux/firmware.h b/com32/include/syslinux/firmware.h
30index 4a43c86..6cc06a0 100644
31--- a/com32/include/syslinux/firmware.h
32+++ b/com32/include/syslinux/firmware.h
33@@ -1,7 +1,8 @@
34 #ifndef _SYSLINUX_FIRMWARE_H
35 #define _SYSLINUX_FIRMWARE_H
36
37-#include <syslinux/memscan.h>
38+#include <inttypes.h>
39+#include <stdbool.h>
40
41 struct term_state;
42
43@@ -42,7 +43,6 @@ struct mem_ops {
44 void *(*malloc)(size_t, enum heap, size_t);
45 void *(*realloc)(void *, size_t);
46 void (*free)(void *);
47- int (*scan_memory)(scan_memory_callback_t, void *);
48 };
49
50 struct initramfs;
51diff --git a/com32/include/syslinux/memscan.h b/com32/include/syslinux/memscan.h
52index c3ebf84..ab78e28 100644
53--- a/com32/include/syslinux/memscan.h
54+++ b/com32/include/syslinux/memscan.h
55@@ -29,11 +29,19 @@
56 #ifndef _SYSLINUX_MEMSCAN_H
57 #define _SYSLINUX_MEMSCAN_H
58
59-#include <stdbool.h>
60+#include <linux/list.h>
61 #include <syslinux/movebits.h> /* addr_t */
62
63-typedef int (*scan_memory_callback_t) (void *, addr_t, addr_t, bool);
64+typedef int (*scan_memory_callback_t) (void *, addr_t, addr_t,
65+ enum syslinux_memmap_types type);
66+
67+struct syslinux_memscan {
68+ int (*func)(scan_memory_callback_t callback, void *data);
69+ struct list_head next;
70+};
71+
72+void syslinux_memscan_add(struct syslinux_memscan *entry);
73+int syslinux_memscan_new(int (*func)(scan_memory_callback_t cb, void *data));
74 int syslinux_scan_memory(scan_memory_callback_t callback, void *data);
75-int bios_scan_memory(scan_memory_callback_t callback, void *data);
76
77 #endif /* _SYSLINUX_MEMSCAN_H */
78diff --git a/com32/lib/syslinux/memscan.c b/com32/lib/syslinux/memscan.c
79index 0ff25d7..fdb7274 100644
80--- a/com32/lib/syslinux/memscan.c
81+++ b/com32/lib/syslinux/memscan.c
82@@ -32,133 +32,44 @@
83 * Query the system for free memory
84 */
85
86-#include <assert.h>
87-#include <stdbool.h>
88-#include <stdlib.h>
89-#include <string.h>
90-#include <inttypes.h>
91-#include <com32.h>
92-
93 #include <syslinux/memscan.h>
94-#include <syslinux/firmware.h>
95
96-struct e820_entry {
97- uint64_t start;
98- uint64_t len;
99- uint32_t type;
100-};
101+static LIST_HEAD(syslinux_memscan_head);
102
103-int bios_scan_memory(scan_memory_callback_t callback, void *data)
104+/*
105+ * Add a memscan entry to the list.
106+ */
107+void syslinux_memscan_add(struct syslinux_memscan *entry)
108 {
109- static com32sys_t ireg;
110- com32sys_t oreg;
111- struct e820_entry *e820buf;
112- uint64_t start, len, maxlen;
113- int memfound = 0;
114- int rv;
115- addr_t dosmem;
116- const addr_t bios_data = 0x510; /* Amount to reserve for BIOS data */
117+ list_add(&entry->next, &syslinux_memscan_head);
118+}
119
120- /* Use INT 12h to get DOS memory */
121- __intcall(0x12, &__com32_zero_regs, &oreg);
122- dosmem = oreg.eax.w[0] << 10;
123- if (dosmem < 32 * 1024 || dosmem > 640 * 1024) {
124- /* INT 12h reports nonsense... now what? */
125- uint16_t ebda_seg = *(uint16_t *) 0x40e;
126- if (ebda_seg >= 0x8000 && ebda_seg < 0xa000)
127- dosmem = ebda_seg << 4;
128- else
129- dosmem = 640 * 1024; /* Hope for the best... */
130- }
131- rv = callback(data, bios_data, dosmem - bios_data, true);
132- if (rv)
133- return rv;
134+/*
135+ * Build a new memscan entry and add it to the list.
136+ */
137+int syslinux_memscan_new(int func(scan_memory_callback_t, void *data))
138+{
139+ struct syslinux_memscan *entry;
140
141- /* First try INT 15h AX=E820h */
142- e820buf = lzalloc(sizeof *e820buf);
143- if (!e820buf)
144+ entry = malloc(sizeof *entry);
145+ if (!entry)
146 return -1;
147
148- ireg.eax.l = 0xe820;
149- ireg.edx.l = 0x534d4150;
150- ireg.ebx.l = 0;
151- ireg.ecx.l = sizeof(*e820buf);
152- ireg.es = SEG(e820buf);
153- ireg.edi.w[0] = OFFS(e820buf);
154-
155- do {
156- __intcall(0x15, &ireg, &oreg);
157-
158- if ((oreg.eflags.l & EFLAGS_CF) ||
159- (oreg.eax.l != 0x534d4150) || (oreg.ecx.l < 20))
160- break;
161-
162- start = e820buf->start;
163- len = e820buf->len;
164-
165- if (start < 0x100000000ULL) {
166- /* Don't rely on E820 being valid for low memory. Doing so
167- could mean stuff like overwriting the PXE stack even when
168- using "keeppxe", etc. */
169- if (start < 0x100000ULL) {
170- if (len > 0x100000ULL - start)
171- len -= 0x100000ULL - start;
172- else
173- len = 0;
174- start = 0x100000ULL;
175- }
176-
177- maxlen = 0x100000000ULL - start;
178- if (len > maxlen)
179- len = maxlen;
180-
181- if (len) {
182- rv = callback(data, (addr_t) start, (addr_t) len,
183- e820buf->type == 1);
184- if (rv)
185- return rv;
186- memfound = 1;
187- }
188- }
189-
190- ireg.ebx.l = oreg.ebx.l;
191- } while (oreg.ebx.l);
192-
193- lfree(e820buf);
194-
195- if (memfound)
196- return 0;
197-
198- /* Next try INT 15h AX=E801h */
199- ireg.eax.w[0] = 0xe801;
200- __intcall(0x15, &ireg, &oreg);
201-
202- if (!(oreg.eflags.l & EFLAGS_CF) && oreg.ecx.w[0]) {
203- rv = callback(data, (addr_t) 1 << 20, oreg.ecx.w[0] << 10, true);
204- if (rv)
205- return rv;
206-
207- if (oreg.edx.w[0]) {
208- rv = callback(data, (addr_t) 16 << 20, oreg.edx.w[0] << 16, true);
209- if (rv)
210- return rv;
211- }
212-
213- return 0;
214- }
215-
216- /* Finally try INT 15h AH=88h */
217- ireg.eax.w[0] = 0x8800;
218- if (!(oreg.eflags.l & EFLAGS_CF) && oreg.eax.w[0]) {
219- rv = callback(data, (addr_t) 1 << 20, oreg.ecx.w[0] << 10, true);
220- if (rv)
221- return rv;
222- }
223-
224+ entry->func = func;
225+ syslinux_memscan_add(entry);
226 return 0;
227 }
228
229 int syslinux_scan_memory(scan_memory_callback_t callback, void *data)
230 {
231- return firmware->mem->scan_memory(callback, data);
232+ struct syslinux_memscan *entry;
233+ int rv = 0;
234+
235+ list_for_each_entry(entry, &syslinux_memscan_head, next) {
236+ rv = entry->func(callback, data);
237+ if (rv)
238+ break;
239+ }
240+
241+ return rv;
242 }
243diff --git a/core/bios.c b/core/bios.c
244index 53223e8..5344833 100644
245--- a/core/bios.c
246+++ b/core/bios.c
247@@ -501,6 +501,129 @@ static inline void bios_timer_init(void)
248
249 extern uint16_t *bios_free_mem;
250
251+struct e820_entry {
252+ uint64_t start;
253+ uint64_t len;
254+ uint32_t type;
255+};
256+
257+static int bios_scan_memory(scan_memory_callback_t callback, void *data)
258+{
259+ static com32sys_t ireg;
260+ com32sys_t oreg;
261+ struct e820_entry *e820buf;
262+ uint64_t start, len, maxlen;
263+ int memfound = 0;
264+ int rv;
265+ addr_t dosmem;
266+ const addr_t bios_data = 0x510; /* Amount to reserve for BIOS data */
267+
268+ /* Use INT 12h to get DOS memory */
269+ __intcall(0x12, &__com32_zero_regs, &oreg);
270+ dosmem = oreg.eax.w[0] << 10;
271+ if (dosmem < 32 * 1024 || dosmem > 640 * 1024) {
272+ /* INT 12h reports nonsense... now what? */
273+ uint16_t ebda_seg = *(uint16_t *) 0x40e;
274+ if (ebda_seg >= 0x8000 && ebda_seg < 0xa000)
275+ dosmem = ebda_seg << 4;
276+ else
277+ dosmem = 640 * 1024; /* Hope for the best... */
278+ }
279+ rv = callback(data, bios_data, dosmem - bios_data, SMT_FREE);
280+ if (rv)
281+ return rv;
282+
283+ /* First try INT 15h AX=E820h */
284+ e820buf = lzalloc(sizeof *e820buf);
285+ if (!e820buf)
286+ return -1;
287+
288+ ireg.eax.l = 0xe820;
289+ ireg.edx.l = 0x534d4150;
290+ ireg.ebx.l = 0;
291+ ireg.ecx.l = sizeof(*e820buf);
292+ ireg.es = SEG(e820buf);
293+ ireg.edi.w[0] = OFFS(e820buf);
294+
295+ do {
296+ __intcall(0x15, &ireg, &oreg);
297+
298+ if ((oreg.eflags.l & EFLAGS_CF) ||
299+ (oreg.eax.l != 0x534d4150) || (oreg.ecx.l < 20))
300+ break;
301+
302+ start = e820buf->start;
303+ len = e820buf->len;
304+
305+ if (start < 0x100000000ULL) {
306+ /* Don't rely on E820 being valid for low memory. Doing so
307+ could mean stuff like overwriting the PXE stack even when
308+ using "keeppxe", etc. */
309+ if (start < 0x100000ULL) {
310+ if (len > 0x100000ULL - start)
311+ len -= 0x100000ULL - start;
312+ else
313+ len = 0;
314+ start = 0x100000ULL;
315+ }
316+
317+ maxlen = 0x100000000ULL - start;
318+ if (len > maxlen)
319+ len = maxlen;
320+
321+ if (len) {
322+ enum syslinux_memmap_types type;
323+
324+ type = e820buf->type == 1 ? SMT_FREE : SMT_RESERVED;
325+ rv = callback(data, (addr_t) start, (addr_t) len, type);
326+ if (rv)
327+ return rv;
328+ memfound = 1;
329+ }
330+ }
331+
332+ ireg.ebx.l = oreg.ebx.l;
333+ } while (oreg.ebx.l);
334+
335+ lfree(e820buf);
336+
337+ if (memfound)
338+ return 0;
339+
340+ /* Next try INT 15h AX=E801h */
341+ ireg.eax.w[0] = 0xe801;
342+ __intcall(0x15, &ireg, &oreg);
343+
344+ if (!(oreg.eflags.l & EFLAGS_CF) && oreg.ecx.w[0]) {
345+ rv = callback(data, (addr_t) 1 << 20, oreg.ecx.w[0] << 10, SMT_FREE);
346+ if (rv)
347+ return rv;
348+
349+ if (oreg.edx.w[0]) {
350+ rv = callback(data, (addr_t) 16 << 20,
351+ oreg.edx.w[0] << 16, SMT_FREE);
352+ if (rv)
353+ return rv;
354+ }
355+
356+ return 0;
357+ }
358+
359+ /* Finally try INT 15h AH=88h */
360+ ireg.eax.w[0] = 0x8800;
361+ if (!(oreg.eflags.l & EFLAGS_CF) && oreg.eax.w[0]) {
362+ rv = callback(data, (addr_t) 1 << 20, oreg.ecx.w[0] << 10, SMT_FREE);
363+ if (rv)
364+ return rv;
365+ }
366+
367+ return 0;
368+}
369+
370+static struct syslinux_memscan bios_memscan = {
371+ .func = bios_scan_memory,
372+};
373+
374 void bios_init(void)
375 {
376 int i;
377@@ -515,6 +638,7 @@ void bios_init(void)
378
379 /* Init the memory subsystem */
380 bios_free_mem = (uint16_t *)0x413;
381+ syslinux_memscan_add(&bios_memscan);
382 mem_init();
383
384 /* CPU-dependent initialization and related checks. */
385@@ -534,7 +658,6 @@ struct mem_ops bios_mem_ops = {
386 .malloc = bios_malloc,
387 .realloc = bios_realloc,
388 .free = bios_free,
389- .scan_memory = bios_scan_memory,
390 };
391
392 struct firmware bios_fw = {
393diff --git a/efi/main.c b/efi/main.c
394index 13b9403..fb8cf05 100644
395--- a/efi/main.c
396+++ b/efi/main.c
397@@ -296,21 +296,21 @@ int efi_scan_memory(scan_memory_callback_t callback, void *data)
398 for (i = 0; i < nr_entries; bufpos += desc_sz, i++) {
399 EFI_MEMORY_DESCRIPTOR *m;
400 UINT64 region_sz;
401- int valid;
402+ enum syslinux_memmap_types type;
403
404 m = (EFI_MEMORY_DESCRIPTOR *)bufpos;
405 region_sz = m->NumberOfPages * EFI_PAGE_SIZE;
406
407 switch (m->Type) {
408 case EfiConventionalMemory:
409- valid = 1;
410+ type = SMT_FREE;
411 break;
412 default:
413- valid = 0;
414+ type = SMT_RESERVED;
415 break;
416 }
417
418- rv = callback(data, m->PhysicalStart, region_sz, valid);
419+ rv = callback(data, m->PhysicalStart, region_sz, type);
420 if (rv)
421 break;
422 }
423@@ -319,11 +319,16 @@ int efi_scan_memory(scan_memory_callback_t callback, void *data)
424 return rv;
425 }
426
427+static struct syslinux_memscan efi_memscan = {
428+ .func = efi_scan_memory,
429+};
430+
431 extern uint16_t *bios_free_mem;
432 void efi_init(void)
433 {
434 /* XXX timer */
435 *bios_free_mem = 0;
436+ syslinux_memscan_add(&efi_memscan);
437 mem_init();
438 }
439
440@@ -1103,7 +1108,6 @@ struct mem_ops efi_mem_ops = {
441 .malloc = efi_malloc,
442 .realloc = efi_realloc,
443 .free = efi_free,
444- .scan_memory = efi_scan_memory,
445 };
446
447 struct firmware efi_fw = {
448--
4491.8.5.3
450
diff --git a/meta/recipes-devtools/syslinux/files/0003-PXELINUX-Add-bios-memscan-function.patch b/meta/recipes-devtools/syslinux/files/0003-PXELINUX-Add-bios-memscan-function.patch
new file mode 100644
index 0000000000..70d65fd71d
--- /dev/null
+++ b/meta/recipes-devtools/syslinux/files/0003-PXELINUX-Add-bios-memscan-function.patch
@@ -0,0 +1,87 @@
1Upstream-Status: Backport [d2f94e74fbd60bf491753895d2474105efb3dedf]
2Signed-off-by: Jonathan Liu <net147@gmail.com>
3
4From 5d57e8eb46f209481069d70eaa778481f6fa3edb Mon Sep 17 00:00:00 2001
5From: Matt Fleming <matt.fleming@intel.com>
6Date: Wed, 17 Jul 2013 13:04:30 +0100
7Subject: [PATCH 3/4] PXELINUX: Add bios memscan function
8
9We can mark the memory region occupied by the PXE stack as SMT_TERMINAL
10provided that KeepPXE isn't set. Historically some very old
11non-relocatable kernel images (memtest86+) have a load address that
12falls within the PXE stack region, so we need to attempt to load into
13that region if at all possible.
14
15Signed-off-by: Matt Fleming <matt.fleming@intel.com>
16---
17 core/fs/pxe/bios.c | 35 +++++++++++++++++++++++++++++++++++
18 1 file changed, 35 insertions(+)
19
20diff --git a/core/fs/pxe/bios.c b/core/fs/pxe/bios.c
21index 81aa715..5f61824 100644
22--- a/core/fs/pxe/bios.c
23+++ b/core/fs/pxe/bios.c
24@@ -1,4 +1,5 @@
25 #include <syslinux/firmware.h>
26+#include <syslinux/memscan.h>
27 #include <core.h>
28 #include "pxe.h"
29 #include <net.h>
30@@ -10,6 +11,9 @@ static uint16_t real_base_mem; /* Amount of DOS memory after freeing */
31 static bool has_gpxe;
32 static uint32_t gpxe_funcs;
33
34+static addr_t pxe_code_start, pxe_code_size;
35+static addr_t pxe_data_start, pxe_data_size;
36+
37 /*
38 * Validity check on possible !PXE structure in buf
39 * return 1 for success, 0 for failure.
40@@ -88,6 +92,29 @@ static const struct pxenv_t *memory_scan_for_pxenv_struct(void)
41 return memory_scan(0x10000, is_pxenv);
42 }
43
44+static int pxelinux_scan_memory(scan_memory_callback_t callback, void *data)
45+{
46+ int rv = 0;
47+
48+ /*
49+ * If we are planning on calling unload_pxe() and unmapping the PXE
50+ * region before we transfer control away from PXELINUX we can mark
51+ * that region as SMT_TERMINAL to indicate that the region will
52+ * become free at some point in the future.
53+ */
54+ if (!KeepPXE) {
55+ dprintf("Marking PXE code region 0x%x - 0x%x as SMT_TERMINAL\n",
56+ pxe_code_start, pxe_code_start + pxe_code_size);
57+ rv = callback(data, pxe_code_start, pxe_code_size, SMT_TERMINAL);
58+
59+ dprintf("Marking PXE data region 0x%x - 0x%x as SMT_TERMINAL\n",
60+ pxe_data_start, pxe_data_start + pxe_data_size);
61+ rv = callback(data, pxe_data_start, pxe_data_size, SMT_TERMINAL);
62+ }
63+
64+ return rv;
65+}
66+
67 /*
68 * Find the !PXE structure; we search for the following, in order:
69 *
70@@ -204,6 +231,14 @@ int pxe_init(bool quiet)
71 printf("UNDI data segment at %04X len %04X\n", data_seg, data_len);
72 }
73
74+ pxe_code_start = code_seg << 4;
75+ pxe_code_size = code_len;
76+
77+ pxe_data_start = data_seg << 4;
78+ pxe_data_size = data_len;
79+
80+ syslinux_memscan_new(pxelinux_scan_memory);
81+
82 code_seg = code_seg + ((code_len + 15) >> 4);
83 data_seg = data_seg + ((data_len + 15) >> 4);
84
85--
861.8.5.3
87
diff --git a/meta/recipes-devtools/syslinux/files/0004-pxe-use-bios_fbm-and-real_base_mem-to-calculate-free.patch b/meta/recipes-devtools/syslinux/files/0004-pxe-use-bios_fbm-and-real_base_mem-to-calculate-free.patch
new file mode 100644
index 0000000000..ee0a77237d
--- /dev/null
+++ b/meta/recipes-devtools/syslinux/files/0004-pxe-use-bios_fbm-and-real_base_mem-to-calculate-free.patch
@@ -0,0 +1,65 @@
1Upstream-Status: Backport [c0ea15936de8378d1da6843d3dbddd8dddba1011]
2Signed-off-by: Jonathan Liu <net147@gmail.com>
3
4From f3347f9b09135d71a4effae1614b22dcdf16a7e2 Mon Sep 17 00:00:00 2001
5From: Matt Fleming <matt.fleming@intel.com>
6Date: Wed, 24 Jul 2013 18:33:14 +0100
7Subject: [PATCH 4/4] pxe: use bios_fbm() and real_base_mem to calculate free
8 space
9
10We don't need to individually add the PXE regions, we already have two
11symbols that denote the memory region that will be freed when calling
12unload_pxe().
13
14This essentially reverts commit 03dda0f1 ("pxe: mark all PXE regions as
15SMT_TERMINAL").
16
17Signed-off-by: Matt Fleming <matt.fleming@intel.com>
18
19Conflicts:
20 core/fs/pxe/bios.c
21---
22 core/fs/pxe/bios.c | 18 +++++++++---------
23 1 file changed, 9 insertions(+), 9 deletions(-)
24
25diff --git a/core/fs/pxe/bios.c b/core/fs/pxe/bios.c
26index 5f61824..ffdffaf 100644
27--- a/core/fs/pxe/bios.c
28+++ b/core/fs/pxe/bios.c
29@@ -94,24 +94,24 @@ static const struct pxenv_t *memory_scan_for_pxenv_struct(void)
30
31 static int pxelinux_scan_memory(scan_memory_callback_t callback, void *data)
32 {
33+ addr_t start, size;
34 int rv = 0;
35
36+ if (KeepPXE)
37+ return 0;
38+
39 /*
40 * If we are planning on calling unload_pxe() and unmapping the PXE
41 * region before we transfer control away from PXELINUX we can mark
42 * that region as SMT_TERMINAL to indicate that the region will
43 * become free at some point in the future.
44 */
45- if (!KeepPXE) {
46- dprintf("Marking PXE code region 0x%x - 0x%x as SMT_TERMINAL\n",
47- pxe_code_start, pxe_code_start + pxe_code_size);
48- rv = callback(data, pxe_code_start, pxe_code_size, SMT_TERMINAL);
49-
50- dprintf("Marking PXE data region 0x%x - 0x%x as SMT_TERMINAL\n",
51- pxe_data_start, pxe_data_start + pxe_data_size);
52- rv = callback(data, pxe_data_start, pxe_data_size, SMT_TERMINAL);
53- }
54+ start = bios_fbm() << 10;
55+ size = (real_base_mem - bios_fbm()) << 10;
56+ dprintf("Marking PXE region 0x%x - 0x%x as SMT_TERMINAL\n",
57+ start, start + size);
58
59+ callback(data, start, size, SMT_TERMINAL);
60 return rv;
61 }
62
63--
641.8.5.3
65
diff --git a/meta/recipes-devtools/syslinux/syslinux_6.01.bb b/meta/recipes-devtools/syslinux/syslinux_6.01.bb
index 078f8bc40b..1af6806100 100644
--- a/meta/recipes-devtools/syslinux/syslinux_6.01.bb
+++ b/meta/recipes-devtools/syslinux/syslinux_6.01.bb
@@ -8,7 +8,11 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=0636e73ff0215e8d672dc4c32c317bb3 \
8# ldlinux.* stuff for now, so skip mtools-native 8# ldlinux.* stuff for now, so skip mtools-native
9DEPENDS = "nasm-native util-linux" 9DEPENDS = "nasm-native util-linux"
10 10
11SRC_URI = "${KERNELORG_MIRROR}/linux/utils/boot/syslinux/6.xx/syslinux-${PV}.tar.bz2" 11SRC_URI = "${KERNELORG_MIRROR}/linux/utils/boot/syslinux/6.xx/syslinux-${PV}.tar.bz2 \
12 file://0001-movebits-Add-SMT_TERMINAL-a-last-resort-region-type.patch \
13 file://0002-memscan-build-a-linked-list-of-memory-scanners.patch \
14 file://0003-PXELINUX-Add-bios-memscan-function.patch \
15 file://0004-pxe-use-bios_fbm-and-real_base_mem-to-calculate-free.patch"
12 16
13SRC_URI[md5sum] = "6945ee89e29119d459baed4937bbc534" 17SRC_URI[md5sum] = "6945ee89e29119d459baed4937bbc534"
14SRC_URI[sha256sum] = "83a04cf81e6a46b80ee5a321926eea095af3498b04317e3674b46c125c7a5b43" 18SRC_URI[sha256sum] = "83a04cf81e6a46b80ee5a321926eea095af3498b04317e3674b46c125c7a5b43"
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-12-14 18:58:42 +0000