From 4e1ef15091b6f42ac13c22e3acc45a9bd9cce852 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 15 Dec 2014 11:05:56 +0100 Subject: [PATCH] arm: semihosting: fix up compile bugs There is currently a regression when using newer ARM64 compilers for semihosting: the way long types are inferred from context is no longer the same. The semihosting runtime uses long and size_t, so use this explicitly in the semihosting code and interface, and voila: the code now works again. Tested with aarch64-linux-gnu-gcc: Linaro GCC 4.9-2014.09. Cc: Darwin Rambo Cc: AKASHI Takahiro Cc: Mark Hambleton Cc: Tom Rini Acked-by: Steve Rae Suggested-by: Mark Hambleton Signed-off-by: Linus Walleij --- arch/arm/include/asm/semihosting.h | 2 +- arch/arm/lib/semihosting.c | 101 +++++++++++++++-------------- 2 files changed, 53 insertions(+), 50 deletions(-) diff --git a/arch/arm/include/asm/semihosting.h b/arch/arm/include/asm/semihosting.h index e59b44ed60..835ca7e4b6 100644 --- a/arch/arm/include/asm/semihosting.h +++ b/arch/arm/include/asm/semihosting.h @@ -12,6 +12,6 @@ * code for more information. */ int smh_load(const char *fname, void *memp, int avail, int verbose); -int smh_len(const char *fname); +long smh_len(const char *fname); #endif /* __SEMIHOSTING_H__ */ diff --git a/arch/arm/lib/semihosting.c b/arch/arm/lib/semihosting.c index 92bbabe158..e9d524e18a 100644 --- a/arch/arm/lib/semihosting.c +++ b/arch/arm/lib/semihosting.c @@ -23,17 +23,17 @@ #define MODE_READ 0x0 #define MODE_READBIN 0x1 -static int smh_read(int fd, void *memp, int len); -static int smh_open(const char *fname, char *modestr); -static int smh_close(int fd); -static int smh_len_fd(int fd); +static long smh_read(long fd, void *memp, size_t len); +static long smh_open(const char *fname, char *modestr); +static long smh_close(long fd); +static long smh_len_fd(long fd); /* * Call the handler */ -static int smh_trap(unsigned int sysnum, void *addr) +static long smh_trap(unsigned int sysnum, void *addr) { - register int result asm("r0"); + register long result asm("r0"); #if defined(CONFIG_ARM64) asm volatile ("hlt #0xf000" : "=r" (result) : "0"(sysnum), "r"(addr)); #else @@ -51,7 +51,9 @@ static int smh_trap(unsigned int sysnum, void *addr) */ int smh_load(const char *fname, void *memp, int avail, int verbose) { - int ret, fd, len; + long ret; + long fd; + size_t len; ret = -1; @@ -61,21 +63,21 @@ int smh_load(const char *fname, void *memp, int avail, int verbose) /* Open the file */ fd = smh_open(fname, "rb"); if (fd == -1) - return ret; + return -1; /* Get the file length */ ret = smh_len_fd(fd); if (ret == -1) { smh_close(fd); - return ret; + return -1; } /* Check that the file will fit in the supplied buffer */ if (ret > avail) { - printf("%s: ERROR ret %d, avail %u\n", __func__, ret, + printf("%s: ERROR ret %ld, avail %u\n", __func__, ret, avail); smh_close(fd); - return ret; + return -1; } len = ret; @@ -87,7 +89,7 @@ int smh_load(const char *fname, void *memp, int avail, int verbose) if (verbose) { printf("\n%s\n", fname); printf(" 0x%8p dest\n", memp); - printf(" 0x%08x size\n", len); + printf(" 0x%08lx size\n", len); printf(" 0x%08x avail\n", avail); } } @@ -101,54 +103,53 @@ int smh_load(const char *fname, void *memp, int avail, int verbose) /* * Read 'len' bytes of file into 'memp'. Returns 0 on success, else failure */ -static int smh_read(int fd, void *memp, int len) +static long smh_read(long fd, void *memp, size_t len) { - int ret; + long ret; struct smh_read_s { - int fd; + long fd; void *memp; - int len; + size_t len; } read; - debug("%s: fd %d, memp %p, len %d\n", __func__, fd, memp, len); + debug("%s: fd %ld, memp %p, len %lu\n", __func__, fd, memp, len); read.fd = fd; read.memp = memp; read.len = len; ret = smh_trap(SYSREAD, &read); - if (ret == 0) { - return 0; - } else { + if (ret < 0) { /* * The ARM handler allows for returning partial lengths, * but in practice this never happens so rather than create * hard to maintain partial read loops and such, just fail * with an error message. */ - printf("%s: ERROR ret %d, fd %d, len %u memp %p\n", + printf("%s: ERROR ret %ld, fd %ld, len %lu memp %p\n", __func__, ret, fd, len, memp); + return -1; } - return ret; + + return 0; } /* * Open a file on the host. Mode is "r" or "rb" currently. Returns a file * descriptor or -1 on error. */ -static int smh_open(const char *fname, char *modestr) +static long smh_open(const char *fname, char *modestr) { - int ret, fd, mode; + long fd; + unsigned long mode; struct smh_open_s { const char *fname; - unsigned int mode; - unsigned int len; + unsigned long mode; + size_t len; } open; debug("%s: file \'%s\', mode \'%s\'\n", __func__, fname, modestr); - ret = -1; - /* Check the file mode */ if (!(strcmp(modestr, "r"))) { mode = MODE_READ; @@ -157,7 +158,7 @@ static int smh_open(const char *fname, char *modestr) } else { printf("%s: ERROR mode \'%s\' not supported\n", __func__, modestr); - return ret; + return -1; } open.fname = fname; @@ -167,7 +168,7 @@ static int smh_open(const char *fname, char *modestr) /* Open the file on the host */ fd = smh_trap(SYSOPEN, &open); if (fd == -1) - printf("%s: ERROR fd %d for file \'%s\'\n", __func__, fd, + printf("%s: ERROR fd %ld for file \'%s\'\n", __func__, fd, fname); return fd; @@ -176,17 +177,15 @@ static int smh_open(const char *fname, char *modestr) /* * Close the file using the file descriptor */ -static int smh_close(int fd) +static long smh_close(long fd) { - int ret; - long fdlong; + long ret; - debug("%s: fd %d\n", __func__, fd); + debug("%s: fd %ld\n", __func__, fd); - fdlong = (long)fd; - ret = smh_trap(SYSCLOSE, &fdlong); + ret = smh_trap(SYSCLOSE, &fd); if (ret == -1) - printf("%s: ERROR fd %d\n", __func__, fd); + printf("%s: ERROR fd %ld\n", __func__, fd); return ret; } @@ -194,17 +193,15 @@ static int smh_close(int fd) /* * Get the file length from the file descriptor */ -static int smh_len_fd(int fd) +static long smh_len_fd(long fd) { - int ret; - long fdlong; + long ret; - debug("%s: fd %d\n", __func__, fd); + debug("%s: fd %ld\n", __func__, fd); - fdlong = (long)fd; - ret = smh_trap(SYSFLEN, &fdlong); + ret = smh_trap(SYSFLEN, &fd); if (ret == -1) - printf("%s: ERROR ret %d\n", __func__, ret); + printf("%s: ERROR ret %ld, fd %ld\n", __func__, ret, fd); return ret; } @@ -212,26 +209,32 @@ static int smh_len_fd(int fd) /* * Get the file length from the filename */ -int smh_len(const char *fname) +long smh_len(const char *fname) { - int ret, fd, len; + long ret; + long fd; + long len; debug("%s: file \'%s\'\n", __func__, fname); /* Open the file */ fd = smh_open(fname, "rb"); - if (fd == -1) + if (fd < 0) return fd; /* Get the file length */ len = smh_len_fd(fd); + if (len < 0) { + smh_close(fd); + return len; + } /* Close the file */ ret = smh_close(fd); - if (ret == -1) + if (ret < 0) return ret; - debug("%s: returning len %d\n", __func__, len); + debug("%s: returning len %ld\n", __func__, len); /* Return the file length (or -1 error indication) */ return len; -- 2.25.1