From 499c27e1bd7015c48cff2c8f99237ab7dbf66a7b Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Tue, 10 Feb 2004 06:50:28 +0000 Subject: Fixup the definition of _dl_open, and move some bits back where they were, till I properly finish the next step in my evil plan. --- ldso/include/dl-syscall.h | 104 +++++++++++++++++------------------ ldso/include/ld_syscall.h | 104 +++++++++++++++++------------------ ldso/ldso/dl-elf.c | 4 +- ldso/ldso/ldso.c | 134 +--------------------------------------------- ldso/ldso/readelflib1.c | 4 +- 5 files changed, 104 insertions(+), 246 deletions(-) (limited to 'ldso') diff --git a/ldso/include/dl-syscall.h b/ldso/include/dl-syscall.h index 1e2ceccd6..344a93039 100644 --- a/ldso/include/dl-syscall.h +++ b/ldso/include/dl-syscall.h @@ -4,14 +4,21 @@ /* Pull in the arch specific syscall implementation */ #include /* For MAP_ANONYMOUS -- differs between platforms */ -#include +#include /* Pull in whatever this particular arch's kernel thinks the kernel version of * struct stat should look like. It turns out that each arch has a different * opinion on the subject, and different kernel revs use different names... */ #define kernel_stat stat #include +#include +/* _dl_open() parameters */ +#define O_RDONLY 0x0000 +#define O_WRONLY 01 +#define O_RDWR 02 +#define O_CREAT 0100 + /* Encoding of the file mode. */ #define S_IFMT 0170000 /* These bits determine file type. */ @@ -25,7 +32,6 @@ #define S_IFSOCK 0140000 /* Socket. */ /* Protection bits. */ - #define S_ISUID 04000 /* Set user ID on execution. */ #define S_ISGID 02000 /* Set group ID on execution. */ #define S_ISVTX 01000 /* Save swapped text after use (sticky). */ @@ -33,6 +39,19 @@ #define S_IWRITE 0200 /* Write by owner. */ #define S_IEXEC 0100 /* Execute by owner. */ +/* Stuff for _dl_mmap */ +#if 0 +#define MAP_FAILED ((void *) -1) +#define _dl_mmap_check_error(X) (((void *)X) == MAP_FAILED) +#else +#ifndef _dl_MAX_ERRNO +#define _dl_MAX_ERRNO 4096 +#endif +#define _dl_mmap_check_error(__res) \ + (((int)__res) < 0 && ((int)__res) >= -_dl_MAX_ERRNO) +#endif + + /* Here are the definitions for some syscalls that are used by the dynamic linker. The idea is that we want to be able @@ -40,79 +59,29 @@ we use our own version here. Note that we cannot assume any dynamic linking at all, so we cannot return any error codes. We just punt if there is an error. */ - - #define __NR__dl_exit __NR_exit static inline _syscall1(void, _dl_exit, int, status); - #define __NR__dl_close __NR_close static inline _syscall1(int, _dl_close, int, fd); - -#if defined(__powerpc__) || defined(__mips__) || defined(__sh__) -/* PowerPC, MIPS and SuperH have a different calling convention for mmap(). */ -#define __NR__dl_mmap __NR_mmap -static inline _syscall6(void *, _dl_mmap, void *, start, size_t, length, - int, prot, int, flags, int, fd, off_t, offset); -#else -#define __NR__dl_mmap_real __NR_mmap -static inline _syscall1(void *, _dl_mmap_real, unsigned long *, buffer); - -static inline void * _dl_mmap(void * addr, unsigned long size, int prot, - int flags, int fd, unsigned long offset) -{ - unsigned long buffer[6]; - - buffer[0] = (unsigned long) addr; - buffer[1] = (unsigned long) size; - buffer[2] = (unsigned long) prot; - buffer[3] = (unsigned long) flags; - buffer[4] = (unsigned long) fd; - buffer[5] = (unsigned long) offset; - return (void *) _dl_mmap_real(buffer); -} -#endif - -#ifndef _dl_MAX_ERRNO -#define _dl_MAX_ERRNO 4096 -#endif -#define _dl_mmap_check_error(__res) \ - (((int)__res) < 0 && ((int)__res) >= -_dl_MAX_ERRNO) -#ifndef MAP_ANONYMOUS -#ifdef __sparc__ -#define MAP_ANONYMOUS 0x20 -#else -#error MAP_ANONYMOUS not defined and suplementary value not known -#endif -#endif - - #define __NR__dl_open __NR_open -#define O_RDONLY 0x0000 -#define O_WRONLY 01 -#define O_RDWR 02 -#define O_CREAT 0100 /* not fcntl */ -static inline _syscall2(int, _dl_open, const char *, fn, int, flags); +static inline _syscall3(int, _dl_open, const char *, fn, int, flags, __kernel_mode_t, mode); #define __NR__dl_write __NR_write -static inline _syscall3(unsigned long, _dl_write, int, fd, +static inline _syscall3(unsigned long, _dl_write, int, fd, const void *, buf, unsigned long, count); - #define __NR__dl_read __NR_read -static inline _syscall3(unsigned long, _dl_read, int, fd, +static inline _syscall3(unsigned long, _dl_read, int, fd, const void *, buf, unsigned long, count); #define __NR__dl_mprotect __NR_mprotect static inline _syscall3(int, _dl_mprotect, const void *, addr, unsigned long, len, int, prot); - - #define __NR__dl_stat __NR_stat static inline _syscall2(int, _dl_stat, const char *, file_name, struct stat *, buf); - #define __NR__dl_munmap __NR_munmap static inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length); @@ -134,5 +103,30 @@ static inline _syscall0(gid_t, _dl_getpid); #define __NR__dl_readlink __NR_readlink static inline _syscall3(int, _dl_readlink, const char *, path, char *, buf, size_t, bufsiz); +#if defined(__powerpc__) || defined(__mips__) || defined(__sh__) +/* PowerPC, MIPS and SuperH have a different calling convention for mmap(). */ +#define __NR__dl_mmap __NR_mmap +static inline _syscall6(void *, _dl_mmap, void *, start, size_t, length, + int, prot, int, flags, int, fd, off_t, offset); +#else +#define __NR__dl_mmap_real __NR_mmap +static inline _syscall1(void *, _dl_mmap_real, unsigned long *, buffer); + +static inline void * _dl_mmap(void * addr, unsigned long size, int prot, + int flags, int fd, unsigned long offset) +{ + unsigned long buffer[6]; + + buffer[0] = (unsigned long) addr; + buffer[1] = (unsigned long) size; + buffer[2] = (unsigned long) prot; + buffer[3] = (unsigned long) flags; + buffer[4] = (unsigned long) fd; + buffer[5] = (unsigned long) offset; + return (void *) _dl_mmap_real(buffer); +} +#endif + + #endif /* _LD_SYSCALL_H_ */ diff --git a/ldso/include/ld_syscall.h b/ldso/include/ld_syscall.h index 1e2ceccd6..344a93039 100644 --- a/ldso/include/ld_syscall.h +++ b/ldso/include/ld_syscall.h @@ -4,14 +4,21 @@ /* Pull in the arch specific syscall implementation */ #include /* For MAP_ANONYMOUS -- differs between platforms */ -#include +#include /* Pull in whatever this particular arch's kernel thinks the kernel version of * struct stat should look like. It turns out that each arch has a different * opinion on the subject, and different kernel revs use different names... */ #define kernel_stat stat #include +#include +/* _dl_open() parameters */ +#define O_RDONLY 0x0000 +#define O_WRONLY 01 +#define O_RDWR 02 +#define O_CREAT 0100 + /* Encoding of the file mode. */ #define S_IFMT 0170000 /* These bits determine file type. */ @@ -25,7 +32,6 @@ #define S_IFSOCK 0140000 /* Socket. */ /* Protection bits. */ - #define S_ISUID 04000 /* Set user ID on execution. */ #define S_ISGID 02000 /* Set group ID on execution. */ #define S_ISVTX 01000 /* Save swapped text after use (sticky). */ @@ -33,6 +39,19 @@ #define S_IWRITE 0200 /* Write by owner. */ #define S_IEXEC 0100 /* Execute by owner. */ +/* Stuff for _dl_mmap */ +#if 0 +#define MAP_FAILED ((void *) -1) +#define _dl_mmap_check_error(X) (((void *)X) == MAP_FAILED) +#else +#ifndef _dl_MAX_ERRNO +#define _dl_MAX_ERRNO 4096 +#endif +#define _dl_mmap_check_error(__res) \ + (((int)__res) < 0 && ((int)__res) >= -_dl_MAX_ERRNO) +#endif + + /* Here are the definitions for some syscalls that are used by the dynamic linker. The idea is that we want to be able @@ -40,79 +59,29 @@ we use our own version here. Note that we cannot assume any dynamic linking at all, so we cannot return any error codes. We just punt if there is an error. */ - - #define __NR__dl_exit __NR_exit static inline _syscall1(void, _dl_exit, int, status); - #define __NR__dl_close __NR_close static inline _syscall1(int, _dl_close, int, fd); - -#if defined(__powerpc__) || defined(__mips__) || defined(__sh__) -/* PowerPC, MIPS and SuperH have a different calling convention for mmap(). */ -#define __NR__dl_mmap __NR_mmap -static inline _syscall6(void *, _dl_mmap, void *, start, size_t, length, - int, prot, int, flags, int, fd, off_t, offset); -#else -#define __NR__dl_mmap_real __NR_mmap -static inline _syscall1(void *, _dl_mmap_real, unsigned long *, buffer); - -static inline void * _dl_mmap(void * addr, unsigned long size, int prot, - int flags, int fd, unsigned long offset) -{ - unsigned long buffer[6]; - - buffer[0] = (unsigned long) addr; - buffer[1] = (unsigned long) size; - buffer[2] = (unsigned long) prot; - buffer[3] = (unsigned long) flags; - buffer[4] = (unsigned long) fd; - buffer[5] = (unsigned long) offset; - return (void *) _dl_mmap_real(buffer); -} -#endif - -#ifndef _dl_MAX_ERRNO -#define _dl_MAX_ERRNO 4096 -#endif -#define _dl_mmap_check_error(__res) \ - (((int)__res) < 0 && ((int)__res) >= -_dl_MAX_ERRNO) -#ifndef MAP_ANONYMOUS -#ifdef __sparc__ -#define MAP_ANONYMOUS 0x20 -#else -#error MAP_ANONYMOUS not defined and suplementary value not known -#endif -#endif - - #define __NR__dl_open __NR_open -#define O_RDONLY 0x0000 -#define O_WRONLY 01 -#define O_RDWR 02 -#define O_CREAT 0100 /* not fcntl */ -static inline _syscall2(int, _dl_open, const char *, fn, int, flags); +static inline _syscall3(int, _dl_open, const char *, fn, int, flags, __kernel_mode_t, mode); #define __NR__dl_write __NR_write -static inline _syscall3(unsigned long, _dl_write, int, fd, +static inline _syscall3(unsigned long, _dl_write, int, fd, const void *, buf, unsigned long, count); - #define __NR__dl_read __NR_read -static inline _syscall3(unsigned long, _dl_read, int, fd, +static inline _syscall3(unsigned long, _dl_read, int, fd, const void *, buf, unsigned long, count); #define __NR__dl_mprotect __NR_mprotect static inline _syscall3(int, _dl_mprotect, const void *, addr, unsigned long, len, int, prot); - - #define __NR__dl_stat __NR_stat static inline _syscall2(int, _dl_stat, const char *, file_name, struct stat *, buf); - #define __NR__dl_munmap __NR_munmap static inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length); @@ -134,5 +103,30 @@ static inline _syscall0(gid_t, _dl_getpid); #define __NR__dl_readlink __NR_readlink static inline _syscall3(int, _dl_readlink, const char *, path, char *, buf, size_t, bufsiz); +#if defined(__powerpc__) || defined(__mips__) || defined(__sh__) +/* PowerPC, MIPS and SuperH have a different calling convention for mmap(). */ +#define __NR__dl_mmap __NR_mmap +static inline _syscall6(void *, _dl_mmap, void *, start, size_t, length, + int, prot, int, flags, int, fd, off_t, offset); +#else +#define __NR__dl_mmap_real __NR_mmap +static inline _syscall1(void *, _dl_mmap_real, unsigned long *, buffer); + +static inline void * _dl_mmap(void * addr, unsigned long size, int prot, + int flags, int fd, unsigned long offset) +{ + unsigned long buffer[6]; + + buffer[0] = (unsigned long) addr; + buffer[1] = (unsigned long) size; + buffer[2] = (unsigned long) prot; + buffer[3] = (unsigned long) flags; + buffer[4] = (unsigned long) fd; + buffer[5] = (unsigned long) offset; + return (void *) _dl_mmap_real(buffer); +} +#endif + + #endif /* _LD_SYSCALL_H_ */ diff --git a/ldso/ldso/dl-elf.c b/ldso/ldso/dl-elf.c index ec324d6c4..cef44965e 100644 --- a/ldso/ldso/dl-elf.c +++ b/ldso/ldso/dl-elf.c @@ -51,7 +51,7 @@ int _dl_map_cache(void) return 0; if (_dl_stat(LDSO_CACHE, &st) - || (fd = _dl_open(LDSO_CACHE, O_RDONLY)) < 0) { + || (fd = _dl_open(LDSO_CACHE, O_RDONLY, 0)) < 0) { _dl_dprintf(2, "%s: can't open cache '%s'\n", _dl_progname, LDSO_CACHE); _dl_cache_addr = (caddr_t) - 1; /* so we won't try again */ return -1; @@ -429,7 +429,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, } libaddr = 0; - infile = _dl_open(libname, O_RDONLY); + infile = _dl_open(libname, O_RDONLY, 0); if (infile < 0) { #if 0 /* diff --git a/ldso/ldso/ldso.c b/ldso/ldso/ldso.c index ae91e5068..064323bf7 100644 --- a/ldso/ldso/ldso.c +++ b/ldso/ldso/ldso.c @@ -314,7 +314,7 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *app_tpnt filename[len1] = '.'; _dl_strcpy (&filename[len1+1], tmp1); - _dl_debug_file= _dl_open (filename, O_WRONLY|O_CREAT, 0644); + _dl_debug_file= _dl_open(filename, O_WRONLY|O_CREAT, 0644); if (_dl_debug_file<0) { _dl_debug_file = 2; @@ -422,7 +422,7 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *app_tpnt struct stat st; char *preload; if (!_dl_stat(LDSO_PRELOAD, &st) && st.st_size > 0) { - if ((fd = _dl_open(LDSO_PRELOAD, O_RDONLY)) < 0) { + if ((fd = _dl_open(LDSO_PRELOAD, O_RDONLY, 0)) < 0) { _dl_dprintf(2, "%s: can't open file '%s'\n", _dl_progname, LDSO_PRELOAD); } else { @@ -767,135 +767,5 @@ static int _dl_suid_ok(void) return 0; } -/* Minimal printf which handles only %s, %d, and %x */ -void _dl_dprintf(int fd, const char *fmt, ...) -{ - int num; - va_list args; - char *start, *ptr, *string; - static char *buf; - - buf = _dl_mmap((void *) 0, PAGE_SIZE, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); - if (_dl_mmap_check_error(buf)) { - _dl_write(fd, "mmap of a spare page failed!\n", 29); - _dl_exit(20); - } - - start = ptr = buf; - - if (!fmt) - return; - - if (_dl_strlen(fmt) >= (PAGE_SIZE - 1)) { - _dl_write(fd, "overflow\n", 11); - _dl_exit(20); - } - - _dl_strcpy(buf, fmt); - va_start(args, fmt); - - while (start) { - while (*ptr != '%' && *ptr) { - ptr++; - } - - if (*ptr == '%') { - *ptr++ = '\0'; - _dl_write(fd, start, _dl_strlen(start)); - - switch (*ptr++) { - case 's': - string = va_arg(args, char *); - - if (!string) - _dl_write(fd, "(null)", 6); - else - _dl_write(fd, string, _dl_strlen(string)); - break; - - case 'i': - case 'd': - { - char tmp[22]; - num = va_arg(args, int); - - string = _dl_simple_ltoa(tmp, num); - _dl_write(fd, string, _dl_strlen(string)); - break; - } - case 'x': - case 'X': - { - char tmp[22]; - num = va_arg(args, int); - - string = _dl_simple_ltoahex(tmp, num); - _dl_write(fd, string, _dl_strlen(string)); - break; - } - default: - _dl_write(fd, "(null)", 6); - break; - } - - start = ptr; - } else { - _dl_write(fd, start, _dl_strlen(start)); - start = NULL; - } - } - _dl_munmap(buf, PAGE_SIZE); - return; -} - -char *_dl_strdup(const char *string) -{ - char *retval; - int len; - - len = _dl_strlen(string); - retval = _dl_malloc(len + 1); - _dl_strcpy(retval, string); - return retval; -} - -void *(*_dl_malloc_function) (size_t size) = NULL; -void *_dl_malloc(int size) -{ - void *retval; - -#if 0 -#ifdef __SUPPORT_LD_DEBUG_EARLY__ - _dl_dprintf(2, "malloc: request for %d bytes\n", size); -#endif -#endif - - if (_dl_malloc_function) - return (*_dl_malloc_function) (size); - - if (_dl_malloc_addr - _dl_mmap_zero + size > PAGE_SIZE) { -#ifdef __SUPPORT_LD_DEBUG_EARLY__ - _dl_dprintf(2, "malloc: mmapping more memory\n"); -#endif - _dl_mmap_zero = _dl_malloc_addr = _dl_mmap((void *) 0, size, - PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); - if (_dl_mmap_check_error(_dl_mmap_zero)) { - _dl_dprintf(2, "%s: mmap of a spare page failed!\n", _dl_progname); - _dl_exit(20); - } - } - retval = _dl_malloc_addr; - _dl_malloc_addr += size; - - /* - * Align memory to 4 byte boundary. Some platforms require this, others - * simply get better performance. - */ - _dl_malloc_addr = (unsigned char *) (((unsigned long) _dl_malloc_addr + 3) & ~(3)); - return retval; -} - - #include "hash.c" #include "readelflib1.c" diff --git a/ldso/ldso/readelflib1.c b/ldso/ldso/readelflib1.c index ec324d6c4..cef44965e 100644 --- a/ldso/ldso/readelflib1.c +++ b/ldso/ldso/readelflib1.c @@ -51,7 +51,7 @@ int _dl_map_cache(void) return 0; if (_dl_stat(LDSO_CACHE, &st) - || (fd = _dl_open(LDSO_CACHE, O_RDONLY)) < 0) { + || (fd = _dl_open(LDSO_CACHE, O_RDONLY, 0)) < 0) { _dl_dprintf(2, "%s: can't open cache '%s'\n", _dl_progname, LDSO_CACHE); _dl_cache_addr = (caddr_t) - 1; /* so we won't try again */ return -1; @@ -429,7 +429,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, } libaddr = 0; - infile = _dl_open(libname, O_RDONLY); + infile = _dl_open(libname, O_RDONLY, 0); if (infile < 0) { #if 0 /* -- cgit v1.2.3