diff options
| author | Ryan Salsamendi <rsalsamendi@hotmail.com> | 2017-06-30 17:29:37 -0700 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2017-07-03 10:33:16 +0000 |
| commit | fa0725dead0fdc7e9330e77c42ff4ed4b36a89c4 (patch) | |
| tree | 95f4af78e21bf1e8a07ab6d27d0224206721c406 /src/northbridge/intel/haswell/northbridge.c | |
| parent | 889ce9c91ecabb40f079111b22124560c55be4e6 (diff) | |
northbridge/intel/haswell: Fix undefined behavior
Fix reports found by undefined behavior sanitizer. Left shifting an int
where the right operand is >= the width of the type is undefined. Add
UL suffix since it's safe for unsigned types.
Change-Id: If2d34e4f05494c17bf9b9dec113b8f6863214e56
Signed-off-by: Ryan Salsamendi <rsalsamendi@hotmail.com>
Reviewed-on: https://review.coreboot.org/20447
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/northbridge/intel/haswell/northbridge.c')
| -rw-r--r-- | src/northbridge/intel/haswell/northbridge.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/northbridge/intel/haswell/northbridge.c b/src/northbridge/intel/haswell/northbridge.c index a8c8015d97..32be916a45 100644 --- a/src/northbridge/intel/haswell/northbridge.c +++ b/src/northbridge/intel/haswell/northbridge.c @@ -36,6 +36,7 @@ static int get_pcie_bar(device_t dev, unsigned int index, u32 *base, u32 *len) { u32 pciexbar_reg; + u32 mask; *base = 0; *len = 0; @@ -47,15 +48,20 @@ static int get_pcie_bar(device_t dev, unsigned int index, u32 *base, u32 *len) switch ((pciexbar_reg >> 1) & 3) { case 0: // 256MB - *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)); + mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); + *base = pciexbar_reg & mask; *len = 256 * 1024 * 1024; return 1; case 1: // 128M - *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)); + mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); + mask |= (1 << 27); + *base = pciexbar_reg & mask; *len = 128 * 1024 * 1024; return 1; case 2: // 64M - *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)|(1 << 26)); + mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); + mask |= (1 << 27) | (1 << 26); + *base = pciexbar_reg & mask; *len = 64 * 1024 * 1024; return 1; } |