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setting ELF_HWCAP fixes dynamic library loading for Linux/sparc64
This patch allows loading busybox from Debian 6 initrd
Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
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Most exec-all.h include directives are now useless, remove them.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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As noticed while looking at "Bump do_syscall() up to 8 syscall arguments"
patch, sync_file_range uses a pad argument on 32bit mips. Deal with it
by reading the correct arguments when on mips.
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Remove fenab as it is only written, never used. Add a FIXME
comment about the discrepancy between our behaviour and that
of the Linux kernel for this routine.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Move the access of fpu_save into the commented out skeleton code for
restoring FPU registers on SPARC sigreturn, thus silencing a gcc
4.6 "variable set but never used" warning.
(This doesn't affect the calculation of 'err' because in fact
__get_user() can never fail.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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On 32 bit MIPS a few syscalls have 7 arguments, and so to call
them via NR_syscall the guest needs to be able to pass 8 arguments
to do_syscall(). Raise the number of arguments do_syscall() takes
accordingly.
This fixes some gcc 4.6 compiler warnings about arg7 and arg8
variables being set and never used.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Just unfold its definition in only use.
Signed-off-by: Juan Quintela <quintela@redhat.com>
[peter.maydell@linaro.org: fixed typo in the debug code,
added parentheses to fix precedence issue]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Looking at the other architectures, we should be using "how" not "arg1".
Signed-off-by: Juan Quintela <quintela@redhat.com>
[peter.maydell@linaro.org: remove unnecessary initialisation of how]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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We assign ret with the error code, but then return 0 unconditionally.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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The dynamic linker from the GNU C library v2.10+ uses the ELF
auxiliary vector AT_RANDOM [1] as a pointer to 16 bytes with random
values to initialize the stack protection mechanism. Technically the
emulated GNU dynamic linker crashes due to a NULL pointer
derefencement if it is built with stack protection enabled and if
AT_RANDOM is not defined by the QEMU ELF loader.
[1] This ELF auxiliary vector was introduced in Linux v2.6.29.
This patch can be tested with the code above:
#include <elf.h> /* Elf*_auxv_t, AT_RANDOM, */
#include <stdio.h> /* printf(3), */
#include <stdlib.h> /* exit(3), EXIT_*, */
#include <stdint.h> /* uint8_t, */
#include <string.h> /* memcpy(3), */
#if defined(__LP64__) || defined(__ILP64__) || defined(__LLP64__)
# define Elf_auxv_t Elf64_auxv_t
#else
# define Elf_auxv_t Elf32_auxv_t
#endif
main(int argc, char* argv[], char* envp[])
{
Elf_auxv_t *auxv;
/* *envp = NULL marks end of envp. */
while (*envp++ != NULL);
/* auxv->a_type = AT_NULL marks the end of auxv. */
for (auxv = (Elf_auxv_t *)envp; auxv->a_type != AT_NULL; auxv++) {
if (auxv->a_type == AT_RANDOM) {
int i;
uint8_t rand_bytes[16];
printf("AT_RANDOM is: 0x%x\n", auxv->a_un.a_val);
memcpy(rand_bytes, (const uint8_t *)auxv->a_un.a_val, sizeof(rand_bytes));
printf("it points to: ");
for (i = 0; i < 16; i++) {
printf("0x%02x ", rand_bytes[i]);
}
printf("\n");
exit(EXIT_SUCCESS);
}
}
exit(EXIT_FAILURE);
}
Changes introduced in v2 and v3:
* Fix typos + thinko (AT_RANDOM is used for stack canary, not for
ASLR)
* AT_RANDOM points to 16 random bytes stored inside the user
stack.
* Add a small test program.
Signed-off-by: Cédric VINCENT <cedric.vincent@st.com>
Signed-off-by: Laurent ALFONSI <laurent.alfonsi@st.com>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Some architectures (like Blackfin) only implement pselect6 (and skip
select/newselect). So add support for it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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There were several remaining bugs in the previous implementation of
do_brk():
1. the value of "new_alloc_size" was one page too large when the
requested brk was aligned on a host page boundary.
2. no new pages should be (re-)allocated when the requested brk is
in the range of the pages that were already allocated
previsouly (for the same purpose). Technically these pages are
never unmapped in the current implementation.
The problem/fix can be reproduced/validated with the test-suite above:
#include <unistd.h> /* syscall(2), */
#include <sys/syscall.h> /* SYS_brk, */
#include <stdio.h> /* puts(3), */
#include <stdlib.h> /* exit(3), EXIT_*, */
#include <stdint.h> /* uint*_t, */
#include <sys/mman.h> /* mmap(2), MAP_*, */
#include <string.h> /* memset(3), */
int main()
{
int exit_status = EXIT_SUCCESS;
uint8_t *current_brk = 0;
uint8_t *initial_brk;
uint8_t *new_brk;
uint8_t *old_brk;
int failure = 0;
int i;
void test_brk(int increment, int expected_result) {
new_brk = (uint8_t *)syscall(SYS_brk, current_brk + increment);
if ((new_brk == current_brk) == expected_result)
failure = 1;
current_brk = (uint8_t *)syscall(SYS_brk, 0);
}
void test_result() {
if (!failure)
puts("OK");
else {
puts("failure");
exit_status = EXIT_FAILURE;
}
}
void test_title(const char *title) {
failure = 0;
printf("%-45s : ", title);
fflush(stdout);
}
test_title("Initialization");
test_brk(0, 1);
initial_brk = current_brk;
test_result();
test_title("Don't overlap \"brk\" pages");
test_brk(HOST_PAGE_SIZE, 1);
test_brk(HOST_PAGE_SIZE, 1);
test_result();
/* Preparation for the test "Re-allocated heap is initialized". */
old_brk = current_brk - HOST_PAGE_SIZE;
memset(old_brk, 0xFF, HOST_PAGE_SIZE);
test_title("Don't allocate the same \"brk\" page twice");
test_brk(-HOST_PAGE_SIZE, 1);
test_brk(HOST_PAGE_SIZE, 1);
test_result();
test_title("Re-allocated \"brk\" pages are initialized");
for (i = 0; i < HOST_PAGE_SIZE; i++) {
if (old_brk[i] != 0) {
printf("(index = %d, value = 0x%x) ", i, old_brk[i]);
failure = 1;
break;
}
}
test_result();
test_title("Don't allocate \"brk\" pages over \"mmap\" pages");
new_brk = mmap(current_brk, HOST_PAGE_SIZE / 2, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
if (new_brk == (void *) -1)
puts("unknown");
else {
test_brk(HOST_PAGE_SIZE, 0);
test_result();
}
test_title("All \"brk\" pages are writable (please wait)");
if (munmap(current_brk, HOST_PAGE_SIZE / 2) != 0)
puts("unknown");
else {
while (current_brk - initial_brk < 2*1024*1024*1024UL) {
old_brk = current_brk;
test_brk(HOST_PAGE_SIZE, -1);
if (old_brk == current_brk)
break;
for (i = 0; i < HOST_PAGE_SIZE; i++)
old_brk[i] = 0xAA;
}
puts("OK");
}
test_title("Maximum size of the heap > 16MB");
failure = (current_brk - initial_brk) < 16*1024*1024;
test_result();
exit(exit_status);
}
Changes introduced in patch v2:
* extend the "brk" test-suite embedded within the commit message;
* heap contents have to be initialized to zero, this bug was
exposed by "tst-calloc.c" from the GNU C library;
* don't [try to] allocate a new host page if the new "brk" is
equal to the latest allocated host page ("brk_page"); and
* print some debug information when DEBUGF_BRK is defined.
Signed-off-by: Cédric VINCENT <cedric.vincent@st.com>
Reviewed-by: Christophe Guillon <christophe.guillon@st.com>
Cc: Riku Voipio <riku.voipio@iki.fi>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Since mmap() with MAP_FIXED will map over the top of existing mappings,
it's a bad idea to use it to implement brk(), because brk() with a
large size is likely to overwrite important things like qemu itself
or the host libc. So we drop MAP_FIXED and handle "mapped but at
different address" as an error case instead.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Fix a bug in the linux-user ELF loader code where it was not correctly
handling images where the lowest vaddr to be loaded was not page aligned.
The problem was that the code to probe for a suitable guest base address
was changing the 'loaddr' variable (by rounding it to a page boundary),
which meant that the load bias would then be incorrectly calculated
unless loaddr happened to already be page-aligned.
Binaries generated by gcc with the default linker script do start with
a loadable segment at a page-aligned vaddr, so were unaffected. This
bug was noticed with a binary created by the Google Go toolchain for ARM.
We fix the bug by refactoring the "probe for guest base" code out into
its own self-contained function.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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This patch fixes a "double free()" due to "realloc(syms, 0)" in the
loader when the ELF file has no "useful" symbol, as with the following
example (compiled with "sh4-linux-gcc -nostdlib"):
.text
.align 1
.global _start
_start:
mov #1, r3
trapa #40 // syscall(__NR_exit)
nop
The bug appears when the log (option "-d") is enabled.
Signed-off-by: Cédric VINCENT <cedric.vincent@st.com>
Signed-off-by: Yves JANIN <yves.janin@st.com>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
Reviewed-by: Richard Henderson <rth@twiddle.net>
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Fixes crash in i386 when user emulation base address is non-zero.
21797 rt_sigreturn(8,1082124603,1,0,1082126048,1082126248)Exit reason and status: signal 11
Signed-off-by: Mike McCormack <mj.mccormack@samsung.com>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Add command line support for logging to a location other than /tmp/qemu.log.
With logging enabled (command line option -d), the log is written to
the hard-coded path /tmp/qemu.log. This patch adds support for writing
the log to a different location by passing the -D option.
Signed-off-by: Matthew Fernandez <matthew.fernandez@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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* rth/axp-next: (26 commits)
target-alpha: Implement TLB flush primitives.
target-alpha: Use a fixed frequency for the RPCC in system mode.
target-alpha: Trap for unassigned and unaligned addresses.
target-alpha: Remap PIO space for 43-bit KSEG for EV6.
target-alpha: Implement cpu_alpha_handle_mmu_fault for system mode.
target-alpha: Implement more CALL_PAL values inline.
target-alpha: Disable interrupts properly.
target-alpha: All ISA checks to use TB->FLAGS.
target-alpha: Swap shadow registers moving to/from PALmode.
target-alpha: Implement do_interrupt for system mode.
target-alpha: Add IPRs to be used by the emulation PALcode.
target-alpha: Use kernel mmu_idx for pal_mode.
target-alpha: Add various symbolic constants.
target-alpha: Use do_restore_state for arithmetic exceptions.
target-alpha: Tidy up arithmetic exceptions.
target-alpha: Tidy exception constants.
target-alpha: Enable the alpha-softmmu target.
target-alpha: Rationalize internal processor registers.
target-alpha: Merge HW_REI and HW_RET implementations.
target-alpha: Cleanup MMU modes.
...
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This patch removes all references to signal.h when qemu-common.h is included
as they become redundant.
Signed-off-by: Alexandre Raymond <cerbere@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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There's no need to attempt to match EXCP_* values with PALcode entry
point offsets. Instead, compress all the values to make for more
efficient switch statements within QEMU.
We will be doing TLB fill within QEMU proper, not within the PALcode,
so all of the ITB/DTB miss, double fault, and access exceptions can
be compressed to EXCP_MMFAULT.
Compress all of the EXCP_CALL_PAL exceptions into one.
Use env->error_code to store the specific entry point.
Signed-off-by: Richard Henderson <rth@twiddle.net>
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Delete all the code that tried to emulate the real IPRs of some
unnamed CPU. Replace those with just 3 slots that we can use to
communicate trap information between the helper functions that
signal exceptions and the OS trap handler.
Signed-off-by: Richard Henderson <rth@twiddle.net>
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* 's390-next' of git://repo.or.cz/qemu/agraf:
s390x: complain when allocating ram fails
s390x: fix memory detection for guests > 64GB
s390x: change mapping base to allow guests > 2GB
s390x: Fix debugging for unknown sigp order codes
s390x: build s390x by default
s390x: remove compatibility cc field
s390x: Adjust GDB stub
s390x: translate engine for s390x CPU
s390x: Adjust internal kvm code
s390x: Implement opcode helpers
s390x: helper functions for system emulation
s390x: Shift variables in CPUState for memset(0)
s390x: keep hint on virtio managing size
s390x: make kvm exported functions conditional on kvm
s390x: s390x-linux-user support
tcg: extend max tcg opcodes when using 64-on-32bit
s390x: fix smp support for kvm
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tb_invalidate_page_range() was intended to be used to invalidate an
area of a TB which the guest explicitly flushes from i-cache. However,
QEMU detects writes to code areas where TBs have been generated, so
his has never been useful.
Delete the function, adjust callers.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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This patch adds support for running s390x binaries in the linux-user emulation
code.
Signed-off-by: Ulrich Hecht <uli@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
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Function bzero is deprecated, so replace it by function memset.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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The kernel doesn't fill the buffer provided to sched_getaffinity
with zero bytes, so neither should QEMU.
Signed-off-by: Mike McCormack <mj.mccormack@samsung.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Zeroing of the cpu array should start from &cpus[kernel_ret]
not &cpus[num_zeros_to_fill].
This fixes a crash in EFL's edje_cc running under qemu-arm.
Signed-off-by: Mike McCormack <mj.mccormack@samsung.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Debian Lenny and other installations with older linux versions
failed to compile linux-user because some CLONE_xxx macros are
undefined.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Quite a number of uid/gid related syscalls are only defined on systems
with USE_UID16 defined. This is apperently based on the idea that these
system calls would never be called on non-UID16 systems. Make these
syscalls available for all architectures that define them.
drop alpha hack to support selected UID16 syscalls. MIPS and PowerPC
were also defined as UID16, to get uid/gid syscalls available, drop
this error as well.
Change QEMU to reflect this.
Cc: Ulrich Hecht <uli@suse.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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We keep a list of host architectures that do llseek with the same
syscall as lseek. S390x is one of them, so let's add it to the list.
Original-patch-by: Ulrich Hecht <uli@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Allow to run properly following program from linux-user:
/* cc -o wifi wifi.c */
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <linux/wireless.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
int main(int argc, char **argv)
{
int ret;
struct ifreq req;
struct sockaddr_in *addr;
int s;
if (argc != 2) {
fprintf(stderr, "Need an interface name (like wlan0)\n");
return 1;
}
s = socket( AF_INET, SOCK_DGRAM, 0 );
if (s < 0) {
perror("Cannot open socket");
return 1;
}
strncpy(req.ifr_name, argv[1], sizeof(req.ifr_name));
ret = ioctl( s, SIOCGIWNAME, &req );
if (ret < 0) {
fprintf(stderr, "No wireless extension\n");
return 1;
}
printf("%s\n", req.ifr_name);
printf("%s\n", req.ifr_newname);
return 0;
}
$ ./wifi eth0
No wireless extension
$ ./wifi wlan0
wlan0
IEEE 802.11bg
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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The result needs to be converted as it is stored in an array of struct
ifreq and sizeof(struct ifreq) differs according to target and host
alignment rules.
This patch allows to execute correctly the following program on arm
and m68k:
#include <stdio.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <alloca.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int main(void)
{
int s, ret;
struct ifconf ifc;
int i;
memset( &ifc, 0, sizeof( struct ifconf ) );
ifc.ifc_len = 8 * sizeof(struct ifreq);
ifc.ifc_buf = alloca(ifc.ifc_len);
s = socket( AF_INET, SOCK_DGRAM, 0 );
if (s < 0) {
perror("Cannot open socket");
return 1;
}
ret = ioctl( s, SIOCGIFCONF, &ifc );
if (s < 0) {
perror("ioctl() failed");
return 1;
}
for (i = 0; i < ifc.ifc_len / sizeof(struct ifreq) ; i ++) {
struct sockaddr_in *s;
s = (struct sockaddr_in*)&ifc.ifc_req[i].ifr_addr;
printf("%s\n", ifc.ifc_req[i].ifr_name);
printf("%s\n", inet_ntoa(s->sin_addr));
}
}
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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Add trace details for getpid(), kill(), _llseek(), rt_sigaction(),
rt_sigprocmask(), clone().
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
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PTHREAD_STACK_MIN (16KB) is somewhat inadequate for a new stack for new
QEMU threads. Set new limit to 256K which should be enough, yet doesn't
increase memory pressure significantly.
Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
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The REG_PC constant used in the ARM nwfpe code is fine in the kernel
but when used in qemu can clash with a definition in the host system
include files (in particular on Ubuntu Lucid SPARC, including signal.h
will define a REG_PC). Rename the constant to avoid this issue.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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float*_eq functions have a different semantics than other comparison
functions. Fix that by first renaming float*_quiet() into float*_eq_quiet().
Note that it is purely mechanical, and the behaviour should be unchanged.
That said it clearly highlight problems due to this different semantics,
they are fixed later in this patch series.
Cc: Alexander Graf <agraf@suse.de>
Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
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Correct the broken attempt to calculate the third argument
to unlock_user() in the code path which unlocked the pollfd
array on return from poll() and ppoll() emulation. (This
only caused a problem if unlock_user() wasn't a no-op, eg
if DEBUG_REMAP is defined.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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When emulating a 32 bit Linux user-mode program on a 64 bit target
we implement the llseek syscall in terms of lseek. Correct a bug
which meant we were silently casting the result of host lseek()
to a 32 bit integer as it passed through get_errno() and thus
throwing away the top half.
We also don't try to store the result back to userspace unless
the seek succeeded; this matches the kernel behaviour.
Thanks to Eoghan Sherry for identifying the problem and suggesting
a solution.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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If CONFIG_USE_GUEST_BASE is not defined, gcc complains:
linux-user/mmap.c:235: error: comparison of unsigned expression >= 0 is always true
because RESERVED_VA is #defined to 0. Since mmap_find_vma_reserved()
will never be called anyway if RESERVED_VA is always 0, fix this by
simply #ifdef'ing away the function and its callsite.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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