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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v4 1/5] tools/debugger: Fix PAGE_SIZE redefinition error
If PAGE_SIZE is already defined in the system (e.g. in /usr/include/limits.h
header) then gcc will trigger a redefinition error because of -Werror. This
patch replaces usage of PAGE_* macros with KDD_PAGE_* macros in order to avoid
confusion between control domain page granularity (PAGE_* definitions) and
guest domain page granularity (which is what we are dealing with here).
We chose to define the KDD_PAGE_* macros instead of using XC_PAGE_* macros
because (1) the code in kdd.c should not include any Xen headers and (2) to add
consistency for code in both kdd.c and kdd-xen.c.
Signed-off-by: Costin Lupu <costin.lupu@xxxxxxxxx>
Reviewed-by: Tim Deegan <tim@xxxxxxx>
---
tools/debugger/kdd/kdd-xen.c | 15 ++++++---------
tools/debugger/kdd/kdd.c | 19 ++++++++-----------
tools/debugger/kdd/kdd.h | 7 +++++++
3 files changed, 21 insertions(+), 20 deletions(-)
diff --git a/tools/debugger/kdd/kdd-xen.c b/tools/debugger/kdd/kdd-xen.c
index f3f9529f9f..e78c9311c4 100644
--- a/tools/debugger/kdd/kdd-xen.c
+++ b/tools/debugger/kdd/kdd-xen.c
@@ -48,9 +48,6 @@
#define MAPSIZE 4093 /* Prime */
-#define PAGE_SHIFT 12
-#define PAGE_SIZE (1U << PAGE_SHIFT)
-
struct kdd_guest {
struct xentoollog_logger xc_log; /* Must be first for xc log callbacks */
xc_interface *xc_handle;
@@ -72,7 +69,7 @@ static void flush_maps(kdd_guest *g)
int i;
for (i = 0; i < MAPSIZE; i++) {
if (g->maps[i] != NULL)
- munmap(g->maps[i], PAGE_SIZE);
+ munmap(g->maps[i], KDD_PAGE_SIZE);
g->maps[i] = NULL;
}
}
@@ -490,13 +487,13 @@ static uint32_t kdd_access_physical_page(kdd_guest *g,
uint64_t addr,
uint32_t map_pfn, map_offset;
uint8_t *map;
- map_pfn = (addr >> PAGE_SHIFT);
- map_offset = addr & (PAGE_SIZE - 1);
+ map_pfn = (addr >> KDD_PAGE_SHIFT);
+ map_offset = addr & (KDD_PAGE_SIZE - 1);
/* Evict any mapping of the wrong frame from our slot */
if (g->pfns[map_pfn % MAPSIZE] != map_pfn
&& g->maps[map_pfn % MAPSIZE] != NULL) {
- munmap(g->maps[map_pfn % MAPSIZE], PAGE_SIZE);
+ munmap(g->maps[map_pfn % MAPSIZE], KDD_PAGE_SIZE);
g->maps[map_pfn % MAPSIZE] = NULL;
}
g->pfns[map_pfn % MAPSIZE] = map_pfn;
@@ -507,7 +504,7 @@ static uint32_t kdd_access_physical_page(kdd_guest *g,
uint64_t addr,
else {
map = xc_map_foreign_range(g->xc_handle,
g->domid,
- PAGE_SIZE,
+ KDD_PAGE_SIZE,
PROT_READ|PROT_WRITE,
map_pfn);
@@ -533,7 +530,7 @@ uint32_t kdd_access_physical(kdd_guest *g, uint64_t addr,
{
uint32_t chunk, rv, done = 0;
while (len > 0) {
- chunk = PAGE_SIZE - (addr & (PAGE_SIZE - 1));
+ chunk = KDD_PAGE_SIZE - (addr & (KDD_PAGE_SIZE - 1));
if (chunk > len)
chunk = len;
rv = kdd_access_physical_page(g, addr, chunk, buf, write);
diff --git a/tools/debugger/kdd/kdd.c b/tools/debugger/kdd/kdd.c
index 17513c2650..320c623eda 100644
--- a/tools/debugger/kdd/kdd.c
+++ b/tools/debugger/kdd/kdd.c
@@ -288,9 +288,6 @@ static void kdd_log_pkt(kdd_state *s, const char *name,
kdd_pkt *p)
* Memory access: virtual addresses and syntactic sugar.
*/
-#define PAGE_SHIFT (12)
-#define PAGE_SIZE (1ULL << PAGE_SHIFT)
-
static uint32_t kdd_read_physical(kdd_state *s, uint64_t addr,
uint32_t len, void *buf)
{
@@ -352,7 +349,7 @@ static uint64_t v2p(kdd_state *s, int cpuid, uint64_t va)
/* Walk the appropriate number of levels */
for (i = levels; i > 0; i--) {
- shift = PAGE_SHIFT + bits * (i-1);
+ shift = KDD_PAGE_SHIFT + bits * (i-1);
mask = ((1ULL << bits) - 1) << shift;
offset = ((va & mask) >> shift) * width;
KDD_DEBUG(s, "level %i: mask 0x%16.16"PRIx64" pa 0x%16.16"PRIx64
@@ -364,12 +361,12 @@ static uint64_t v2p(kdd_state *s, int cpuid, uint64_t va)
return -1ULL; // Not present
pa = entry & 0x000ffffffffff000ULL;
if (pse && (i == 2) && (entry & 0x80)) { // Superpage
- mask = ((1ULL << (PAGE_SHIFT + bits)) - 1);
+ mask = ((1ULL << (KDD_PAGE_SHIFT + bits)) - 1);
return (pa & ~mask) + (va & mask);
}
}
- return pa + (va & (PAGE_SIZE - 1));
+ return pa + (va & (KDD_PAGE_SIZE - 1));
}
static uint32_t kdd_access_virtual(kdd_state *s, int cpuid, uint64_t addr,
@@ -380,7 +377,7 @@ static uint32_t kdd_access_virtual(kdd_state *s, int cpuid,
uint64_t addr,
/* Process one page at a time */
while (len > 0) {
- chunk = PAGE_SIZE - (addr & (PAGE_SIZE - 1));
+ chunk = KDD_PAGE_SIZE - (addr & (KDD_PAGE_SIZE - 1));
if (chunk > len)
chunk = len;
pa = v2p(s, cpuid, addr);
@@ -591,7 +588,7 @@ static void get_os_info_64(kdd_state *s)
uint64_t dbgkd_addr;
DBGKD_GET_VERSION64 dbgkd_get_version64;
/* Maybe 1GB is too big for the limit to search? */
- uint32_t search_limit = (1024 * 1024 * 1024) / PAGE_SIZE; /*1GB/PageSize*/
+ uint32_t search_limit = (1024 * 1024 * 1024) / KDD_PAGE_SIZE;
/*1GB/PageSize*/
uint64_t efer;
/* if we are not in 64-bit mode, fail */
@@ -620,7 +617,7 @@ static void get_os_info_64(kdd_state *s)
* in 1GB range above the current page base address
*/
- base = idt0_addr & ~(PAGE_SIZE - 1);
+ base = idt0_addr & ~(KDD_PAGE_SIZE - 1);
while (search_limit) {
uint16_t val;
@@ -633,7 +630,7 @@ static void get_os_info_64(kdd_state *s)
if (val == MZ_HEADER) // MZ
break;
- base -= PAGE_SIZE;
+ base -= KDD_PAGE_SIZE;
search_limit -= 1;
}
@@ -720,7 +717,7 @@ static void find_os(kdd_state *s)
/* Try each page in the potential range of kernel load addresses */
for (limit = s->os.base + s->os.range;
s->os.base <= limit;
- s->os.base += PAGE_SIZE)
+ s->os.base += KDD_PAGE_SIZE)
if (check_os(s))
return;
}
diff --git a/tools/debugger/kdd/kdd.h b/tools/debugger/kdd/kdd.h
index b9a17440df..b476a76d93 100644
--- a/tools/debugger/kdd/kdd.h
+++ b/tools/debugger/kdd/kdd.h
@@ -39,6 +39,13 @@
#define PACKED __attribute__((packed))
+/* We define our page related constants here in order to specifically
+ * avoid using the Xen page macros (this is a restriction for the code
+ * in kdd.c which should not include any Xen headers) and to add
+ * consistency for code in both kdd.c and kdd-xen.c. */
+#define KDD_PAGE_SHIFT 12
+#define KDD_PAGE_SIZE (1U << KDD_PAGE_SHIFT)
+
/*****************************************************************************
* Serial line protocol: Sender sends a 16-byte header with an optional
* payload following it. Receiver responds to each packet with an
--
2.20.1
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