diff options
Diffstat (limited to 'application')
| -rw-r--r-- | application/palemoon/app/Makefile.in | 8 | ||||
| -rw-r--r-- | application/palemoon/app/moz.build | 3 | ||||
| -rw-r--r-- | application/palemoon/app/nsBrowserApp.cpp | 45 | ||||
| -rw-r--r-- | application/palemoon/confvars.sh | 5 |
4 files changed, 61 insertions, 0 deletions
diff --git a/application/palemoon/app/Makefile.in b/application/palemoon/app/Makefile.in index c0f01212c..94f4dc1f3 100644 --- a/application/palemoon/app/Makefile.in +++ b/application/palemoon/app/Makefile.in @@ -33,6 +33,14 @@ NSDISTMODE = copy include $(topsrcdir)/config/config.mk +# If we are trying to show an error dialog about the lack of SSE2 support, +# make sure that code itself doesn't use SSE2. +ifdef MOZ_LINUX_SSE2_STARTUP_ERROR +CXXFLAGS := $(filter-out -march=% -msse2 -mfpmath=sse,$(CXXFLAGS)) +CXX := $(filter-out -march=% -msse2 -mfpmath=sse,$(CXX)) +CXXFLAGS += -msse -mno-sse2 -mfpmath=387 +endif + ifeq ($(OS_ARCH),WINNT) # Rebuild firefox.exe if the manifest changes - it's included by splash.rc. # (this dependency should really be just for firefox.exe, not other targets) diff --git a/application/palemoon/app/moz.build b/application/palemoon/app/moz.build index 8b358b622..044c3e2d1 100644 --- a/application/palemoon/app/moz.build +++ b/application/palemoon/app/moz.build @@ -68,3 +68,6 @@ if CONFIG['MOZ_LINKER']: if CONFIG['HAVE_CLOCK_MONOTONIC']: OS_LIBS += CONFIG['REALTIME_LIBS'] + +if CONFIG['MOZ_LINUX_SSE2_STARTUP_ERROR']: + DEFINES['MOZ_LINUX_SSE2_STARTUP_ERROR'] = True diff --git a/application/palemoon/app/nsBrowserApp.cpp b/application/palemoon/app/nsBrowserApp.cpp index 8b0613528..c73b05d23 100644 --- a/application/palemoon/app/nsBrowserApp.cpp +++ b/application/palemoon/app/nsBrowserApp.cpp @@ -35,6 +35,51 @@ #include "mozilla/Telemetry.h" #include "mozilla/WindowsDllBlocklist.h" +#ifdef MOZ_LINUX_SSE2_STARTUP_ERROR +#include <cpuid.h> +#include "mozilla/Unused.h" + +static bool +IsSSE2Available() +{ + // The rest of the app has been compiled to assume that SSE2 is present + // unconditionally, so we can't use the normal copy of SSE.cpp here. + // Since SSE.cpp caches the results and we need them only transiently, + // instead of #including SSE.cpp here, let's just inline the specific check + // that's needed. + unsigned int level = 1u; + unsigned int eax, ebx, ecx, edx; + unsigned int bits = (1u<<26); + unsigned int max = __get_cpuid_max(0, nullptr); + if (level > max) { + return false; + } + __cpuid_count(level, 0, eax, ebx, ecx, edx); + return (edx & bits) == bits; +} + +static const char sSSE2Message[] = + "This browser version requires a processor with the SSE2 instruction " + "set extension.\n"; + +__attribute__((constructor)) +static void +SSE2Check() +{ + if (IsSSE2Available()) { + return; + } + // Using write() in order to avoid jemalloc-based buffering. Ignoring return + // values, since there isn't much we could do on failure and there is no + // point in trying to recover from errors. + MOZ_UNUSED(write(STDERR_FILENO, + sSSE2Message, + MOZ_ARRAY_LENGTH(sSSE2Message) - 1)); + // _exit() instead of exit() to avoid running the usual "at exit" code. + _exit(255); +} +#endif + #if !defined(MOZ_WIDGET_COCOA) && !defined(MOZ_WIDGET_ANDROID) #define MOZ_BROWSER_CAN_BE_CONTENTPROC #include "../../ipc/contentproc/plugin-container.cpp" diff --git a/application/palemoon/confvars.sh b/application/palemoon/confvars.sh index 5109c0829..d1d2ce065 100644 --- a/application/palemoon/confvars.sh +++ b/application/palemoon/confvars.sh @@ -98,6 +98,11 @@ if test "$OS_ARCH" = "WINNT" -o \ MOZ_BUNDLED_FONTS=1 fi +# Display an error on non-SSE2 Linux systems +if test "$OS_ARCH" = "Linux"; then + MOZ_LINUX_SSE2_STARTUP_ERROR=1 +fi + # Short-circuit a few services to be removed MOZ_MAINTENANCE_SERVICE= MOZ_SERVICES_HEALTHREPORT= |